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Farnell PDF

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REF102: 10V Precision Voltage Reference (Rev. A) - Farnell - Farnell Element 14

REF102: 10V Precision Voltage Reference (Rev. A) - Texas Instrument - Farnell Element 14 - Revenir à l'accueil

 

 

Branding Farnell element14 (France)

 

Farnell Element 14 :

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Everything You Need To Know About Arduino

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Tutorial 01 for Arduino: Getting Acquainted with Arduino

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The Cube® 3D Printer

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What's easier- DIY Dentistry or our new our website features?

 

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Ben Heck's Getting Started with the BeagleBone Black Trailer

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Ben Heck's Home-Brew Solder Reflow Oven 2.0 Trailer

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Get Started with Pi Episode 3 - Online with Raspberry Pi

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Discover Simulink Promo -- Exclusive element14 Webinar

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Ben Heck's TV Proximity Sensor Trailer

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Ben Heck's PlayStation 4 Teardown Trailer

See the trailer for the next exciting episode of The Ben Heck show. Check back on Friday to be among the first to see the exclusive full show on element…

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Get Started with Pi Episode 4 - Your First Raspberry Pi Project

Connect your Raspberry Pi to a breadboard, download some code and create a push-button audio play project.

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Ben Heck Anti-Pickpocket Wallet Trailer

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Molex Earphones - The 14 Holiday Products of Newark element14 Promotion

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Tripp Lite Surge Protector - The 14 Holiday Products of Newark element14 Promotion

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Microchip ChipKIT Pi - The 14 Holiday Products of Newark element14 Promotion

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Beagle Bone Black - The 14 Holiday Products of Newark element14 Promotion

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3M E26, LED Lamps - The 14 Holiday Products of Newark element14 Promotion

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3M Colored Duct Tape - The 14 Holiday Products of Newark element14 Promotion

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Tenma Soldering Station - The 14 Holiday Products of Newark element14 Promotion

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Duratool Screwdriver Kit - The 14 Holiday Products of Newark element14 Promotion

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Cubify 3D Cube - The 14 Holiday Products of Newark element14 Promotion

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Bud Boardganizer - The 14 Holiday Products of Newark element14 Promotion

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Raspberry Pi Starter Kit - The 14 Holiday Products of Newark element14 Promotion

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Fluke 323 True-rms Clamp Meter - The 14 Holiday Products of Newark element14 Promotion

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Dymo RHINO 6000 Label Printer - The 14 Holiday Products of Newark element14 Promotion

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3M LED Advanced Lights A-19 - The 14 Holiday Products of Newark element14 Promotion

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Innovative LPS Resistor Features Very High Power Dissipation

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Charge Injection Evaluation Board for DG508B Multiplexer Demo

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Ben Heck The Great Glue Gun Trailer Part 2

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Introducing element14 TV

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Ben Heck Time to Meet Your Maker Trailer

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Détecteur de composants

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Recherche intégrée

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Ben Builds an Accessibility Guitar Trailer Part 1

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Ben Builds an Accessibility Guitar - Part 2 Trailer

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PiFace Control and Display Introduction

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Flashmob Farnell

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Express Yourself in 3D with Cube 3D Printers from Newark element14

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Farnell YouTube Channel Move

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Farnell: Design with the best

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French Farnell Quest

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Altera - 3 Ways to Quickly Adapt to Changing Ethernet Protocols

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Cy-Net3 Network Module

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MC AT - Professional and Precision Series Thin Film Chip Resistors

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Solderless LED Connector

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PSA-T Series Spectrum Analyser: PSA1301T/ PSA2701T

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3-axis Universal Motion Controller For Stepper Motor Drivers: TMC429

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Voltage Level Translation

Puce électronique / Microchip :

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Microchip - 8-bit Wireless Development Kit

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Microchip - Introduction to mTouch Capacitive Touch Sensing Part 2 of 3

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Microchip - Introduction to mTouch Capacitive Touch Sensing Part 3 of 3

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Microchip - Introduction to mTouch Capacitive Touch Sensing Part 1 of 3

Sans fil - Wireless :

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Microchip - 8-bit Wireless Development Kit

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Wireless Power Solutions - Wurth Electronics, Texas Instruments, CadSoft and element14

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Analog Devices - Remote Water Quality Monitoring via a Low Power, Wireless Network

Texas instrument :

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Texas Instruments - Automotive LED Headlights

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Texas Instruments - Digital Power Solutions

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Texas Instruments - Industrial Sensor Solutions

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Texas Instruments - Wireless Pen Input Demo (Mobile World Congress)

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Texas Instruments - Industrial Automation System Components

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Texas Instruments - TMS320C66x - Industry's first 10-GHz fixed/floating point DSP

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Texas Instruments - TMS320C66x KeyStone Multicore Architecture

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Texas Instruments - Industrial Interfaces

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Texas Instruments - Concerto™ MCUs - Connectivity without compromise

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Texas Instruments - Stellaris Robot Chronos

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Texas Instruments - DRV8412-C2-KIT, Brushed DC and Stepper Motor Control Kit

Ordinateurs :

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Ask Ben Heck - Connect Raspberry Pi to Car Computer

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Ben's Portable Raspberry Pi Computer Trailer

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Ben's Raspberry Pi Portable Computer Trailer 2

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Ben Heck's Pocket Computer Trailer

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Ask Ben Heck - Atari Computer

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Ask Ben Heck - Using Computer Monitors for External Displays

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Raspberry Pi Partnership with BBC Computer Literacy Project - Answers from co-founder Eben Upton

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Installing RaspBMC on your Raspberry Pi with the Farnell element14 Accessory kit

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Raspberry Pi Served - Joey Hudy

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Happy Birthday Raspberry Pi

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Raspberry Pi board B product overview

Logiciels :

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Ask Ben Heck - Best Opensource or Free CAD Software

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Tektronix FPGAView™ software makes debugging of FPGAs faster than ever!

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Ask Ben Heck - Best Open-Source Schematic Capture and PCB Layout Software

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Introduction to Cadsoft EAGLE PCB Design Software in Chinese

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Altera - Developing Software for Embedded Systems on FPGAs

Tutoriels :

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Ben Heck The Great Glue Gun Trailer Part 1

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the knode tutorial - element14

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Ben's Autodesk 123D Tutorial Trailer

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Ben's CadSoft EAGLE Tutorial Trailer

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Ben Heck's Soldering Tutorial Trailer

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Ben Heck's AVR Dev Board tutorial

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Ben Heck's Pinball Tutorial Trailer

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Ben Heck's Interface Tutorial Trailer

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First Stage with Python and PiFace Digital

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Cypress - Getting Started with PSoC® 3 - Part 2

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Energy Harvesting Challenge

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New Features of CadSoft EAGLE v6

Autres documentations :

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REF102 SBVS022A – SEPTEMBER 2000 – REVISED NOVEMBER 2003 www.ti.com FEATURES  +10V ±0.0025V OUTPUT  VERY LOW DRIFT: 2.5ppm/°C max  EXCELLENT STABILITY: 5ppm/1000hr typ  EXCELLENT LINE REGULATION: 1ppm/V max  EXCELLENT LOAD REGULATION: 10ppm/mA max  LOW NOISE: 5μVPP typ, 0.1Hz to 10Hz  WIDE SUPPLY RANGE: 11.4VDC to 36VDC  LOW QUIESCENT CURRENT: 1.4mA max  PACKAGE OPTIONS: PLASTIC DIP, SO-8 PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2000-2003, Texas Instruments Incorporated 10V Precision Voltage Reference Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. APPLICATIONS  PRECISION-CALIBRATED VOLTAGE STANDARD  D/A AND A/D CONVERTER REFERENCE  PRECISION CURRENT REFERENCE  ACCURATE COMPARATOR THRESHOLD REFERENCE  DIGITAL VOLTMETERS  TEST EQUIPMENT  PC-BASED INSTRUMENTATION DESCRIPTION The REF102 is a precision 10V voltage reference. The drift is laser-trimmed to 2.5ppm/°C max C-grade over the industrial temperature range. The REF102 achieves its precision without a heater. This results in low power, fast warm-up, excellent stability, and low noise. The output voltage is extremely insensitive to both line and load variations and can be externally adjusted with minimal effect on drift and stability. Single supply operation from 11.4V to 36V and excellent overall specifications make the REF102 an ideal choice for demanding instrumentation and system reference applications. – + A R2 R3 R4 R6 R1 R5 1 50kΩ 22kΩ 7kΩ 4kΩ 8kΩ DZ1 Noise Reduction Common VOUT Trim V+ 14kΩ 5 2 6 8 4 REF102 REF102 REF102 2 www.ti.com SBVS022A SPECIFIED MAX INITIAL MAX DRIFT PACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT PRODUCT ERROR (mV) (PPM/°C) PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER MEDIA, QUANTITY REF102AU ±10 ±10 SO-8 D –25°C to +85°C REF102AU REF102AU Tube, 100 " ±10 ±10 SO-8 D " REF102AU/2K5 REF102AU/2K5 Tape and Reel, 2500 REF102AP ±10 ±10 DIP-8 P " REF102AP REF102AP Tube, 50 REF102BU ±5 ±5 SO-8 D " REF102BU REF102BU Tube, 100 " ±5 ±5 SO-8 D " REF102BU/2K5 REF102BU/2K5 Tape and Reel, 2500 REF102BP ±5 ±5 DIP-8 P " REF102BP REF102BP Tube, 50 REF102CU ±2.5 ±2.5 SO-8 D " REF102CU REF102CU Tube, 100 " ±2.5 ±2.5 SO-8 D " REF102CU/2K5 REF102CU/2K5 Tape and Reel, 2500 REF102CP ±2.5 ±2.5 DIP-8 P " REF102CP REF102CP Tube, 50 PIN CONFIGURATIONS Top View DIP, SO Input Voltage ...................................................................................... +40V Operating Temperature P, U ................................................................................. –25°C to +85°C Storage Temperature Range P, U ............................................................................... –40°C to +125°C Lead Temperature (soldering, 10s) ............................................... +300°C (SO, 3s) ........................................................... +260°C Short-Circuit Protection to Common or V+ .............................. Continuous NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. ABSOLUTE MAXIMUM RATINGS(1) ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE/ORDERING INFORMATION(1) NOTE: (1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet. 8 7 6 5 1 2 3 4 NC = Not Connected Noise Reduction NC VOUT Trim NC V+ Com NC REF102 3 SBVS022A www.ti.com ELECTRICAL CHARACTERISTICS At TA = +25°C and VS = +15V power supply, unless otherwise noted. REF102A REF102B REF102C PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS OUTPUT VOLTAGE Initial TA = 25°C 9.99 10.01 9.995 10.005 9.9975 10.0025 V vs Temperature (1) 10 5 2.5 ppm/°C vs Supply (Line Regulation) VS = 11.4V to 36V 2 1 1 ppm/V vs Output Current (Load Regulation) IL = 0mA to +10mA 20 10 10 ppm/mA IL = 0mA to –5mA 40 20 20 ppm/mA vs Time TA = +25°C M Package 5 ✻ ✻ ppm/1000hr P, U Packages (2) 20 ✻ ppm/1000hr Trim Range (3) ±3 ✻ ✻ % Capacitive Load, max 1000 ✻ ✻ pF NOISE 0.1Hz to 10Hz 5 ✻ ✻ μVPP OUTPUT CURRENT +10, –5 ✻ ✻ mA INPUT VOLTAGE RANGE +11.4 +36 ✻ ✻ ✻ ✻ V QUIESCENT CURRENT IOUT = 0 +1.4 ✻ ✻ mA WARM-UP TIME (4) To 0.1% 15 ✻ ✻ μs TEMPERATURE RANGE Specification REF102A, B, C –25 +85 ✻ ✻ ✻ ✻ °C ✻ Specifications same as REF102A. NOTES: (1) The “box” method is used to specify output voltage drift vs temperature. See the Discussion of Performance section. (2) Typically 5ppm/1000hrs after 168hr powered stabilization. (3) Trimming the offset voltage affects drift slightly. See Installation and Operating Instructions for details. (4) With noise reduction pin floating. See Typical Characteristics for details. REF102 4 www.ti.com SBVS022A TYPICAL CHARACTERISTICS At TA = +25°C, VS = +15V, unless otherwise noted. POWER TURN-ON RESPONSE VOUT VIN Time (5μs/div) Power Turn-On POWER TURN-ON RESPONSE with 1μF CN VOUT VIN Time (10ms/div) Power Turn-On POWER SUPPLY REJECTION vs FREQUENCY 130 120 110 100 90 80 70 60 1 100 1k 10k Frequency (Hz) Power Supply Rejection (dB) LOAD REGULATION +1.5 +1.0 +0.5 0 −0.5 −1.0 −1.5 –5 0 +5 +10 Output Current (mA) Output Voltage Change (mV) RESPONSE TO THERMAL SHOCK 0 15 30 45 60 +600 +300 0 –300 –600 TA = +25°C REF102C Immersed in +85°C Fluorinert Bath Output Voltage Change (μV) Time (s) TA = +85°C QUIESCENT CURRENT vs TEMPERATURE 1.6 1.4 1.2 1.0 0.8 −50 −25 0 +25 +50 +75 +100 +125 Temperature (°C) Quiescent Current (mA) −75 REF102 5 SBVS022A www.ti.com TYPICAL CHARACTERISTICS (Cont.) At TA = +25°C, VS = +15V, unless otherwise noted. TYPICAL REF102 REFERENCE NOISE 6 4 2 0 −2 −4 −6 Low Frequency Noise (1s/div) (See Noise Test Circuit) Noise Voltage (μV) – + OPA227 DUT Noise Test Circuit. 100μF 15.8kΩ 20Ω 2kΩ 8kΩ 2μF Oscilloscope Gain = 100V/V f − 3 d B = 0.1Hz and 10Hz THEORY OF OPERATION Refer to the diagram on the first page of this data sheet. The 10V output is derived from a compensated buried zener diode DZ1, op amp A1, and resistor network R1 – R6. Approximately 8.2V is applied to the non-inverting input of A1 by DZ1. R1, R2, and R3 are laser-trimmed to produce an exact 10V output. The zener bias current is established from the regulated output voltage through R4. R5 allows user-trimming of the output voltage by providing for small external adjustment of the amplifier gain. Because the temperature coefficient (TCR) of of R5 closely matches the TCR of R1, R2 and R3 , the voltage trim has minimal effect on the reference drift. The output voltage noise of the REF102 is dominated by the noise of the zener diode. A capacitor can be connected between the Noise Reduction pin and ground to form a lowpass filter with R6 and roll off the high-frequency noise of the zener. DISCUSSION OF PERFORMANCE The REF102 is designed for applications requiring a precision voltage reference where both the initial value at room temperature and the drift over temperature are of importance to the user. Two basic methods of specifying voltage reference drift versus temperature are in common usage in the industry—the “butterfly method” and the “box method.” The REF102 is specified by the more commonly-used “box method.” The “box” is formed by the high and low specification temperatures and a diagonal, the slope of which is equal to the maximum specified drift. Since the shape of the actual drift curve is not known, the vertical position of the box is not known, either. It is, however, bounded by VUPPER BOUND and VLOWER BOUND (see Figure 1). Figure 1 uses the REF102CU as an example. It has a drift specification of 2.5ppm/°C maximum and a specification temperature range of –25°C to +85°C. The “box” height, V1 to V2, is 2.75mV. REF102CU VUPPER BOUND +10.00275 V1 VNOMINAL +10.0000 2.75mV Worst-case ΔVOUT for REF102CU V2 +9.99725 REF102CU VLOWER BOUND −25 0 +25 +50 +85 Output Voltage (V) Temperature (°C) FIGURE 1. REF102CU Output Voltage Drift. REF102 6 www.ti.com SBVS022A INSTALLATION AND OPERATING INSTRUCTIONS BASIC CIRCUIT CONNECTION Figure 2 shows the proper connection of the REF102. To achieve the specified performance, pay careful attention to layout. A low resistance star configuration will reduce voltage errors, noise pickup, and noise coupled from the power supply. Commons should be connected as indicated, being sure to minimize interconnection resistances. OPTIONAL OUTPUT VOLTAGE ADJUSTMENT Optional output voltage adjustment circuits are shown in Figures 3 and 4. Trimming the output voltage will change the voltage drift by approximately 0.008ppm/°C per mV of trimmed voltage. In the circuit in Figure 3, any mismatch in TCR between the two sections of the potentiometer will also affect drift, but the effect of the ΔTCR is reduced by a factor of five by the internal resistor divider. A high quality potentiometer, with good mechanical stability, such as a cermet, should be REF102 1μF Tantalum + RL 1 RL 2 RL 3 V+ (1) 2 (2) (1) (2) 4 6 NOTES: (1) Lead resistances here of up to a few ohms have negligible effect on performance. (2) A resistance of 0.1Ω in series with these leads will cause a 1mV error when the load current is at its maximum of 10mA. This results in a 0.01% error of 10V. FIGURE 2. REF102 Installation. REF102 1μF Tantalum + V+ 2 4 20k Output Voltage Adjust Minimum range (±300mV) and minimal degradation of drift. Ω +10V 5 VTRIM 6 VOUT FIGURE 3. REF102 Optional Output Voltage Adjust. REF102 V+ 2 4 20k Output Voltage Adjust Higher resolution, reduced range (typically ±25mV). Ω +10V 5 VTRIM 6 VOUT RS 1M Ω 1μF Tantalum + FIGURE 4. REF102 Optional Output Voltage, Fine Adjust. used. The circuit in Figure 3 has a minimum trim range of ±300mV. The circuit in Figure 4 has less range but provides higher resolution. The mismatch in TCR between RS and the internal resistors can introduce some slight drift. This effect is minimized if RS is kept significantly larger than the 50kΩ internal resistor. A TCR of 100ppm/°C is normally sufficient. REF102 7 SBVS022A www.ti.com OPTIONAL NOISE REDUCTION The high-frequency noise of the REF102 is dominated by the zener diode noise. This noise can be greatly reduced by connecting a capacitor between the Noise Reduction pin and ground. The capacitor forms a low-pass filter with R6 (refer to the figure on page 1) and attenuates the high-frequency noise generated by the zener. Figure 5 shows the effect of a 1μF noise reduction capacitor on the high-frequency noise of the REF102. R6 is typically 7kΩ so the filter has a –3dB frequency of about 22Hz. The result is a reduction in noise from about 800μVPP to under 200μVPP. If further noise reduction is required, use the circuit in Figure 14. APPLICATIONS INFORMATION High accuracy, extremely low drift, outstanding stability, and low cost make the REF102 an ideal choice for all instrumentation and system reference applications. Figures 6 through 14 show a variety of useful application circuits. 6 b) Precision –10V Reference. a) Resistor Biased –10V Reference RS IL 4 REF102 2 −10V Out See SBVA008 for more detail. V+ (1.4V to 26V) 1.4mA < < 5.4mA (5V −IL) RS 2 6 4 10V OPA227 R1 2kΩ C 1000pF 1 −10V Out −15V REF102 V+ (1.4V to 26V) FIGURE 6. –10V Reference Using a) Resistor or b) OPA227. NO CN CN = 1μF FIGURE 5. Effect of 1μF Noise Reduction Capacitor on Broadband Noise (f–3dB = 1MHz) REF102 8 www.ti.com SBVS022A FIGURE 7. +10V Reference With Output Current Boosted to: a) ±20mA, b) +100mA, and c) IL (TYP) +10mA, –5A. Ω – + OPA227 6 220 +10V IL 6 +10V IL 2N2905 6 +10V 4 IL REF102 V+ a) −20mA < IL < +20mA (OPA227 also improves transient immunity) b) −5mA < IL < +100mA c) IL (MAX) = IL (TYP) +10mA IL (MIN) = IL (TYP) −5mA VCC − 10V IL (TYP) R1 = 2 4 REF102 V+ 2 4 REF102 V+ 2 – + INA126 V x100 2 4 6 +15V −5V –15V 357 1/2W Ω 2 3 OPA227 – + 357 1/2W Ω 28mA 28.5mA +5V 350 Strain Gauge Bridge Ω 5 10 R 8 G OUT 6 REF102 V+ REF102 6 4 2 3 See SBVA007 for more details. 1 25kΩ 25kΩ 25kΩ 25kΩ INA105 5 6 +10V Out −10V Out 2 – + LOAD IOUT Can be connected to ground or −VS . V+ REF102 2 6 4 OPA277 R IOUT = , R ≥ 1kΩ See SBVA001 for more details and ISINK Circuit. 10V R FIGURE 8. Strain Gauge Conditioner for 350Ω Bridge. FIGURE 9. ±10V Reference. FIGURE 10. Positive Precision Current Source. REF102 9 SBVS022A www.ti.com 6 +30V 31.4V to 56V 2 4 6 2 6 2 4 +20V +10V REF102 4 REF102 REF102 NOTES: (1) REF102s can be stacked to obtain voltages in multiples of 10V. (2) The supply voltage should be between 10n + 1.4 and 10n + 26, where n is the number of REF102s. (3) Output current of each REF102 must not exceed its rated output current of +10, −5mA. This includes the current delivered to the lower REF102. – + 2 4 6 +5V Out INA105 2 5 1 3 6 –5V Out REF102 V+ – + 2 4 6 +10V +5V INA105 5 1 3 6 2 REF102 V+ Ω – + OPA227 6 2k +10V REF102 (2) 2 R 1k 1 4 VOUT 2 Ω C VREF 1 1μF C2 1μF R2 2kΩ VREF = (V01 + V02 … VOUT N) N eN = 5μVPP (f = 0.1Hz to 1MHz) See SBVA002 for more details. √N 2 3 Ω 6 2k REF102 (1) 2 4 VOUT 1 Ω 6 2k VOUT N V+ REF102 (N) 2 4 V+ V+ FIGURE 11. Stacked References. FIGURE 12. ±5V Reference. FIGURE 13. +5V and +10V Reference. FIGURE 14. Precision Voltage Reference with Extremely Low Noise. PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) REF102AM OBSOLETE TO-99 LMC 8 TBD Call TI Call TI REF102AP ACTIVE PDIP P 8 50 TBD Call TI Level-NA-NA-NA REF102AU ACTIVE SOIC D 8 100 TBD CU NIPDAU Level-2-240C-1 YEAR REF102AU/2K5 ACTIVE SOIC D 8 2500 TBD CU NIPDAU Level-2-220C-1 YEAR REF102BM OBSOLETE TO-99 LMC 8 TBD Call TI Call TI REF102BP ACTIVE PDIP P 8 50 TBD Call TI Level-NA-NA-NA REF102BU ACTIVE SOIC D 8 100 TBD CU NIPDAU Level-2-240C-1 YEAR REF102CM OBSOLETE TO-99 LMC 8 TBD Call TI Call TI REF102CP ACTIVE PDIP P 8 50 TBD Call TI Level-NA-NA-NA REF102CU ACTIVE SOIC D 8 100 TBD CU NIPDAU Level-2-240C-1 YEAR REF102RM OBSOLETE TO-99 LMC 8 TBD Call TI Call TI REF102SM OBSOLETE TO-99 LMC 8 TBD Call TI Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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PACKAGE OPTION ADDENDUM www.ti.com 28-Nov-2005 Addendum-Page 1 MECHANICAL DATA MMBC008 – MARCH 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 LMC (O–MBCY–W8) METAL CYLINDRICAL 4202483/A 03/01 4 3 2 1 8 7 6 5 0.335 (8,51) 0.500 (12,70) MIN 0.021 (0,53) 0.016 (0,41) 0.040 (1,02) 0.305 (7,75) 0.010 (0,25) 0.335 (8,51) 0.165 (4,19) 0.185 (4,70) 0.370 (9,40) 0.040 (1,02) MAX 0.105 (2,67) 0.095 (2,41) 0.140 (3,56) 0.160 (4,06) 0.095 (2,41) 0.105 (2,67) 0.028 (0,71) 0.034 (0,86) 0.045 (1,14) 0.029 (0,74) ø ø ø ø Seating Plane 0.200 (5,08) 45° NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Leads in true position within 0.010 (0,25) R @ MMC at seating plane. D. Pin numbers shown for reference only. Numbers may not be marked on package. E. Falls within JEDEC MO-002/TO-99. MECHANICAL DATA MPDI001A – JANUARY 1995 – REVISED JUNE 1999 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 P (R-PDIP-T8) PLASTIC DUAL-IN-LINE 8 4 0.015 (0,38) Gage Plane 0.325 (8,26) 0.300 (7,62) 0.010 (0,25) NOM MAX 0.430 (10,92) 4040082/D 05/98 0.200 (5,08) MAX 0.125 (3,18) MIN 5 0.355 (9,02) 0.020 (0,51) MIN 0.070 (1,78) MAX 0.240 (6,10) 0.260 (6,60) 0.400 (10,60) 1 0.015 (0,38) 0.021 (0,53) Seating Plane 0.010 (0,25) M 0.100 (2,54) NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. Falls within JEDEC MS-001 For the latest package information, go to http://www.ti.com/sc/docs/package/pkg_info.htm IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Amplifiers amplifier.ti.com Audio www.ti.com/audio Data Converters dataconverter.ti.com Automotive www.ti.com/automotive DSP dsp.ti.com Broadband www.ti.com/broadband Interface interface.ti.com Digital Control www.ti.com/digitalcontrol Logic logic.ti.com Military www.ti.com/military Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork Microcontrollers microcontroller.ti.com Security www.ti.com/security Telephony www.ti.com/telephony Video & Imaging www.ti.com/video Wireless www.ti.com/wireless Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2005, Texas Instruments Incorporated TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 􀀀 Direct Upgrades to TL05x, TL07x, and TL08x BiFET Operational Amplifiers 􀀀 Greater Than 2× Bandwidth (10 MHz) and 3× Slew Rate (45 V/μs) Than TL08x 􀀀 On-Chip Offset Voltage Trimming for Improved DC Performance 􀀀 Wider Supply Rails Increase Dynamic Signal Range to ±19 V description The TLE208x series of JFET-input operational amplifiers more than double the bandwidth and triple the slew rate of the TL07x and TL08x families of BiFET operational amplifiers. The TLE208x also have wider supply-voltage rails, increasing the dynamic-signal range for BiFET circuits to ±19 V. On-chip zener trimming of offset voltage yields precision grades for greater accuracy in dc-coupled applications. The TLE208x are pin-compatible with lower performance BiFET operational amplifiers for ease in improving performance in existing designs. BiFET operational amplifiers offer the inherently higher input impedance of the JFET-input transistors, without sacrificing the output drive associated with bipolar amplifiers. This makes these amplifiers better suited for interfacing with high-impedance sensors or very low level ac signals. They also feature inherently better ac response than bipolar or CMOS devices having comparable power consumption. Because BiFET operational amplifiers are designed for use with dual power supplies, care must be taken to observe common-mode input-voltage limits and output voltage swing when operating from a single supply. DC biasing of the input signal is required and loads should be terminated to a virtual ground node at mid-supply. Texas Instruments TLE2426 integrated virtual ground generator is useful when operating BiFET amplifiers from single supplies. The TLE208x are fully specified at ±15 V and ±5 V. For operation in low-voltage and/or single-supply systems, Texas Instruments LinCMOS families of operational amplifiers (TLC- and TLV-prefix) are recommended. When moving from BiFET to CMOS amplifiers, particular attention should be paid to slew rate and bandwidth requirements and output loading. For BiFET circuits requiring low noise and/or tighter dc precision, the TLE207x offer the same ac response as the TLE208x with more stringent dc and noise specifications. PRODUCTION DATA information is current as of publication date. Copyright  2001, Texas Instruments Incorporated Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. LinCMOS is a trademark of Texas Instruments. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081 AVAILABLE OPTIONS PACKAGED DEVICES CHIP TA VIOmax AT 25°C SMALL OUTLINE (D) CHIP CARRIER (FK) CERAMIC DIP (JG) PLASTIC DIP (P) FORM (Y) 0°C to 70°C 3 mV TLE2081ACD TLE2081ACP — 6 mV TLE2081CD — — TLE2081CP TLE2081Y 40°C to 85°C 3 mV TLE2081AID TLE2081AIP –6 mV TLE2081ID — — TLE2081IP — 55°C to 125°C 3 mV TLE2081AMFK TLE2081AMJG –6 mV — TLE2081MFK TLE2081MJG — — † The D packages are available taped and reeled. Add R suffix to device type (e.g., TLE2081ACDR). ‡ Chip forms are tested at TA = 25°C only. TLE2082 AVAILABLE OPTIONS PACKAGED DEVICES TA VIOmax AT 25°C SMALL OUTLINE (D) CHIP CARRIER (FK) CERAMIC DIP (JG) PLASTIC DIP (P) CHIP FORM (Y) 0°C to 70°C 4 mV TLE2082ACD TLE2082ACP 7 mV TLE2082CD — — TLE2082CP — 40°C to 85°C 4 mV TLE2082AID TLE2082AIP –TLE2082Y 7 mV TLE2082ID — — TLE2082IP 55°C to 125°C 4 mV TLE2082AMD TLE2082AMFK TLE2082AMJG TLE2082AMP –7 mV TLE2082MD TLE2082MFK TLE2082MJG TLE2082MP — ‡ The D packages are available taped and reeled. Add R suffix to device type (e.g., TLE2082ACDR). ‡ Chip forms are tested at TA = 25°C only. TLE2084 AVAILABLE OPTIONS PACKAGED DEVICES CHIP TA VIOmax AT 25°C SMALL OUTLINE (DW) CHIP CARRIER (FK) CERAMIC DIP (J) PLASTIC DIP (N) FORM (Y) 0°C to 70°C 4 mV TLE2084ACDW TLE2084ACN — 7 mV TLE2084CDW — — TLE2084CN TLE2084Y 55°C to 125°C 4 mV TLE2084AMFK TLE2084AMJ –7 mV — TLE2084MFK TLE2084MJ — — † The DW packages are available taped and reeled. Add R suffix to device type (e.g., TLE2084ACDWR). ‡ Chip forms are tested at TA = 25°C only. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 1 2 3 4 8 7 6 5 OFFSET N1 IN – IN + VCC– NC VCC+ OUT OFFSET N2 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 NC VCC+ NC OUT NC NC IN – NC IN + NC NC OFFSET N1 NC NC NC NC V NC OFFSET N2 NC CC – TLE2081 D, JG, OR P PACKAGE (TOP VIEW) TLE2081 FK PACKAGE (TOP VIEW) 1 2 3 4 8 7 6 5 1OUT 1IN– 1IN + VCC– VCC+ 2OUT 2IN– 2IN+ 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 NC 2OUT NC 2IN– NC NC 1IN– NC 1IN+ NC NC 1OUT NC NC NC NC V NC 2IN + CC – V CC + TLE2082 D, JG, OR P PACKAGE (TOP VIEW) TLE2082 FK PACKAGE (TOP VIEW) 3 2 1 20 19 9 10 11 12 13 4 5 6 7 8 18 17 16 15 14 4IN+ NC VCC– NC 3IN+ 1IN+ NC VCC+ NC 2IN+ TLE2084 FK PACKAGE (TOP VIEW) 1IN – 1OUT NC 3IN – 4IN – 2 IN – NC 3OUT 2OUT 4OUT 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1OUT 1IN– 1IN+ VCC+ 2IN+ 2IN– 2OUT NC 4OUT 4IN– 4IN+ VCC– 3IN+ 3IN– 3OUT NC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1OUT 1IN– 1IN+ VCC+ 2IN+ 2IN– 2OUT 4OUT 4IN– 4IN+ VCC– 3IN+ 3IN– 3OUT TLE2084 J OR N PACKAGE (TOP VIEW) TLE2084 DW PACKAGE (TOP VIEW) NC – No internal connection symbol + – OUT IN+ IN– TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081Y chip information This chip, when properly assembled, displays characteristics similar to the TLE2081. Thermal compression or ultrasonic bonding may be used on the doped-aluminum bonding pads. Chips may be mounted with conductive epoxy or a gold-silicon preform. BONDING PAD ASSIGNMENTS CHIP THICKNESS: 15 TYPICAL BONDING PADS: 4 × 4 MINIMUM TJmax = 150°C TOLERANCES ARE ±10%. ALL DIMENSIONS ARE IN MILS. PIN (4) IS INTERNALLY CONNECTED TO BACKSIDE OF THE CHIP. + – OUT IN+ IN– VCC+ (6) (3) (2) (5) (1) (7) (4) OFFSET N1 OFFSET N2 VCC– 58 85 (1) (2) (4) (5) (6) (7) (8) (3) TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 TLE2082Y chip information This chip, when properly assembled, displays characteristics similar to the TLE2082. Thermal compression or ultrasonic bonding may be used on the doped-aluminum bonding pads. Chips may be mounted with conductive epoxy or a gold-silicon preform. BONDING PAD ASSIGNMENTS CHIP THICKNESS: 15 TYPICAL BONDING PADS: 4 × 4 MINIMUM TJmax = 150°C TOLERANCES ARE ±10%. ALL DIMENSIONS ARE IN MILS. PIN (4) IS INTERNALLY CONNECTED TO BACKSIDE OF THE CHIP. + – 1OUT 1IN+ 1IN– VCC+ (4) (6) (3) (2) (5) (1) (7) (8) – + 2OUT 2IN+ 2IN– VCC– 80 90 (1) (2) (3) (4) (5) (6) (7) (8) TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2084Y chip information This chip, when properly assembled, displays characteristics similar to the TLE2084. Thermal compression or ultrasonic bonding may be used on the doped-aluminum bonding pads. Chips may be mounted with conductive epoxy or a gold-silicon preform. BONDING PAD ASSIGNMENTS CHIP THICKNESS: 15 TYPICAL BONDING PADS: 4 × 4 MINIMUM TJmax = 150°C TOLERANCES ARE ±10%. ALL DIMENSIONS ARE IN MILS. PIN (11) IS INTERNALLY CONNECTED TO BACKSIDE OF THE CHIP. + – 1OUT 1IN+ 1IN– VCC+ (11) (6) (3) (2) (5) (1) (7) (4) – + 2OUT 2IN+ 2IN– VCC– + – 3OUT 3IN+ 3IN– (13) (10) (9) (12) (8) (14) – + 4OUT 4IN+ 4IN– (2) (1) (14) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) 100 150 (3) TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 equivalent schematic (each channel) Q1 IN– IN+ Q2 D1 Q7 Q5 Q6 Q9 Q10 C2 R4 Q14 Q4 Q3 R1 Q8 R2 Q11 R3 C1 Q12 D2 Q13 Q15 Q16 Q19 Q20 Q17 R6 VCC– VCC+ R8 C3 Q18 R7 R5 C4 Q21 C5 R9 R10 Q22 Q26 Q27 Q31 R14 Q29 Q25 C6 Q30 R11 Q23 Q28 Q24 D3 OUT R13 R12 OFFSET N1 (see Note A) OFFSET N2 (see Note A) NOTE A: OFFSET N1 and OFFSET N2 are only availiable on the TLE2081x devices. ACTUAL DEVICE COMPONENT COUNT COMPONENT TLE2081 TLE2082 TLE2084 Transistors 33 57 114 Resistors 25 37 74 Diodes 8 5 10 Capacitors 6 11 22 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC+ (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 V Supply voltage, VCC– (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –19 V Differential input voltage range, VID (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC+ to VCC– Input voltage range, VI (any input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC+ to VCC– Input current, II (each input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1 mA Output current, IO (each output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±80 mA Total current into VCC+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 mA Total current out of VCC– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 mA Duration of short-circuit current at (or below) 25°C (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . unlimited Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA: C suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C I suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to 85°C M suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C Case temperature for 60 seconds: FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: DW or N package . . . . . . . . . . . . . . . 260°C Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . . . . . . 300°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values, except differential voltages, are with respect to the midpoint between VCC+ and VCC–. 2. Differential voltages are at IN+ with respect to IN–. 3. The output can be shorted to either supply. Temperatures and/or supply voltages must be limited to ensure that the maximum dissipation rate is not exceeded. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING TA = 125°C POWER RATING D 725 mW 5.8 mW/°C 464 mW 377 mW 145 mW DW 1025 mW 8.2 mW/°C 656 mW 533 mW 205 mW FK 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW J 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW JG 1050 mW 8.4 mW/°C 672 mW 546 mW 210 mW N 1150 mW 9.2 mW/°C 736 mW 598 mW 230 mW P 1000 mW 8.0 mW/°C 640 mW 344 mW 200 mW recommended operating conditions C SUFFIX I SUFFIX M SUFFIX UNIT MIN MAX MIN MAX MIN MAX Supply voltage, VCC± ±2.25 ±19 ±2.25 ±19 ±2.25 ±19 V Common mode input voltage VIC VCC± = ±5 V –0.9 5 –0.8 5 –0.8 5 Common-voltage, V VCC± = ±15 V –10.9 15 –10.8 15 –10.8 15 Operating free-air temperature, TA 0 70 –40 85 –55 125 °C TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 TLE2081C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.34 6 0.3 3 mV VIC = 0, VO = 0, Full range 8 5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 3.2 29 3.2 29 μV/°C IIO Input offset current 25°C 5 100 5 100 nA VIC = 0, VO = 0, Full range 1.4 1.4 IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 nA Full range 5 5 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to g to –0.9 –0.9 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.7 3.7 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.4 3.4 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.5 1.5 IO = 200 μA 25°C –3.5 –4.2 –3.5 –4.2 Full range –3.4 –3.4 VOM Maximum negative peak IO = 2 mA 25°C –3.7 –4.1 –3.7 –4.1 VOM– V g output voltage swing Full range –3.6 –3.6 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.5 –1.5 RL = 600 Ω 25°C 80 91 80 91 Full range 79 79 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 89 89 RL = 10 kΩ 25°C 95 106 95 106 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, Common mode 25°C 11 11 IC pF , See Figure 5 Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 70 89 70 89 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio(ΔVCC± /ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.6 2.2 1.35 1.6 2.2 0, mA Full range 2.2 2.2 IOS Short-circuit output VO = 0 VID = 1 V 25°C –35 –35 mA current VID = –1 V 45 45 † Full range is 0°C to 70°C. TLE2081C operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD 1 RL 2 kΩ Full range 23 23 V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 23 23 V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(, VD , RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity gain VI = 10 mV, RL = 2 kΩ, φm I 25°C 56° 56° , L , CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 11 TLE2081C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.49 6 0.47 3 mV VIC = 0, VO = 0, Full range 8 5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 3.2 29 3.2 29 μV/°C IIO Input offset current 25°C 6 100 6 100 nA VIC = 0, VO = 0, Full range 1.4 1.4 IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 nA Full range 5 5 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to g to –10.9 –10.9 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.7 13.7 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.4 13.4 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.5 11.5 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.7 –13.7 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.4 –13.4 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.5 –11.5 RL = 600 Ω 25°C 80 96 80 96 Full range 79 79 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 89 89 RL = 10 kΩ 25°C 95 118 95 118 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, See Figure 5 Common mode 25°C 7.5 7.5 i pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 79 79 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC± /ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 81 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.7 2.2 1.35 1.7 2.2 0, mA Full range 2.2 2.2 I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 † Full range is 0°C to 70°C. TLE2081C operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2081C TLE2081AC TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 30 40 30 40 SR+ Positive slew rate VO(PP) = 10 V, AVD = –1, RL 2 kΩ CL 100 pF Full range 27 27 V/μs = kΩ, = pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate Full range 27 27 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak S See Figure 3 10 kHz 25°C equivalent input noise μV voltage f = 0.1 Hz to 10 Hz 0.6 0.6 I Equivalent input noise In VIC = 0 f = 10 kHz 25°C 2 8 2 8 fA/√Hz q current 0, 2.8 2.8 fA /√THD + N Total harmonic VO(PP) = 20 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 008% 0 008% distortion plus noise = kHz, = kΩ, RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8 10 8 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output- VO(PP) = 20 V, AVD = –1, 25°C 478 637 478 637 kHz swing bandwidth O(, VD , RL = 2 kΩ, CL = 25 pF φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g y gain I L CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 13 TLE2081I electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081I TLE2081AI TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.34 6 0.3 3 mV VIC = 0, VO = 0, Full range 7.6 5.6 αVIO Temperature coefficient of input offset voltage RS = 50 Ω, Full range 3.2 29 3.2 29 μV/°C IIO Input offset current 25°C 5 100 5 100 pA VIC = 0, VO = 0, Full range 5 5 nA IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 pA Full range 10 10 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to g to –0.8 –0.8 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.7 3.7 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.4 3.4 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.5 1.5 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.7 –3.7 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.4 –3.4 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.5 –1.5 RL = 600 Ω 25°C 80 91 80 91 Full range 79 79 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 89 89 RL = 10 kΩ 25°C 95 106 95 106 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, See Figure 5 Common mode 25°C 11 11 i pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 70 89 70 89 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 14 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081I electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2081I TLE2081AI TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.6 2.2 1.35 1.6 2.2 0, mA Full range 2.2 2.2 IOS Short-circuit output VO = 0 VID = 1 V 25°C –35 –35 mA current VID = –1 V 45 45 † Full range is –40°C to 85°C. TLE2081I operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2081I TLE2081AI TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD 1 RL 2 kΩ Full range 22 22 V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 22 22 V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(, VD , RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity gain VI = 10 mV, RL = 2 kΩ, φm I 25°C 56° 56° , L , CL = 25 pF, See Figure 2 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 15 TLE2081I electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081I TLE2081AI TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.49 6 0.47 3 mV VIC = 0, VO = 0, Full range 7.6 5.6 αVIO Temperature coefficient of input offset voltage RS = 50 Ω, Full range 3.2 29 3.2 29 μV/°C IIO Input offset current 25°C 6 100 6 100 pA VIC = 0, VO = 0, Full range 5 5 nA IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 pA Full range 10 10 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to g to –10.8 –10.8 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.7 13.7 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.4 13.4 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.5 11.5 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.7 –13.7 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.4 –13.4 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.5 –11.5 RL = 600 Ω 25°C 80 96 80 96 Full range 79 79 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 89 89 RL = 10 kΩ 25°C 95 118 95 118 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, See Figure 5 Common mode 25°C 7.5 7.5 i pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, VO 0 25°C 80 98 80 98 dB rejection ratio = 0, RS = 50 Ω Full range 79 79 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 16 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081I electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2081I TLE2081AI TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.7 2.2 1.35 1.7 2.2 0, mA Full range 2.2 2.2 I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 † Full range is –40°C to 85°C. TLE2081I operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS TA† TLE2081I TLE2081AI UNIT MIN TYP MAX MIN TYP MAX 25°C 30 40 30 40 SR+ Positive slew rate VO(PP) = ±10 V, AVD = –1 RL = 2 kΩ Full range 24 24 V/μs 1, kΩ, CL = 100 pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate F, Full range 24 24 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts R μs L = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent See Figure 3 10 kHz 25°C input noise voltage μV f = 0.1 Hz to 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 20 V, AVD = 10, plus noise f = 1 kHz, RL = 2 kΩ, 25°C 0 008% 0 008% RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I L 25°C 8 10 8 10 MHz CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478 637 478 637 kHz g bandwidth O(VD RL = 2 kΩ, CL = 25 pF φm Phase margin at unity gain VI = 10 mV, RL = 2 kΩ, I L 25°C 57° 57° CL = 25 pF, See Figure 2 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 17 TLE2081M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.34 6 0.3 3 mV VIC = 0, VO = 0, Full range 11.2 8.2 αVIO Temperature coefficient of input offset voltage RS = 50Ω Full range 3.2 29∗ 3.2 29∗ μV/°C IIO Input offset current 25°C 5 100 5 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 pA Full range 65 65 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to g to –0.8 –0.8 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.6 3.6 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.3 3.3 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.4 1.4 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.6 –3.6 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.3 –3.3 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.4 –1.4 RL = 600 Ω 25°C 80 91 80 91 Full range 78 78 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 88 88 RL = 10 kΩ 25°C 95 106 95 106 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, See Figure 5 Common mode 25°C 11 11 i pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 70 89 70 89 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.6 2.2 1.35 1.6 2.2 0, mA Full range 2.2 2.2 IOS Short-circuit output VO = 0 VID = 1 V 25°C –35 –35 mA current VID = –1 V 45 45 † Full range is –55°C to 125°C. TLE2081M operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD 1 RL 2 kΩ Full range 20∗ 20∗ V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 20∗ 20∗ V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak S See Figure 3 10 kHz 25°C equivalent input noise μV voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA /√Hz THD + N Total harmonic VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% distortion plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(, VD , RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 19 TLE2081M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.49 6 0.47 3 mV VIC = 0, VO = 0, Full range 11.2 8.2 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 3.2 29∗ 3.2 29∗ μV/°C IIO Input offset current 25°C 6 100 6 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 pA Full range 65 65 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to g to –10.8 –10.8 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.6 13.6 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.3 13.3 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.4 11.4 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.6 –13.6 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.3 –13.3 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.4 –11.4 RL = 600 Ω 25°C 80 96 80 96 Full range 78 78 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 88 88 RL = 10 kΩ 25°C 95 118 95 118 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, See Figure 5 Common mode 25°C 7.5 7.5 i pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 78 78 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC± /ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 20 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2081M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted)(continued) PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX ICC Supply current VO = 0 No load 25°C 1.35 1.7 2.2 1.35 1.7 2.2 0, mA Full range 2.2 2.2 I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 † Full range is –55°C to 125°C. TLE2081M operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2081M TLE2081AM TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 30 40 30 40 SR+ Positive slew rate VO(PP) = 10 V, AVD 1 RL 2 kΩ Full range 22 22 V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate F, Full range 22 22 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak S See Figure 3 10 kHz 25°C equivalent input noise μV voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 20 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 008% 0 008% plus noise = kHz, = kΩ, RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8∗ 10 8∗ 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478∗ 637 478∗ 637 kHz g bandwidth O(, VD , RL = 2 kΩ, CL = 25 pF φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g y gain I L CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 21 TLE2081Y electrical characteristics at VCC± = ±15 V, TA = 25°C PARAMETER TEST CONDITIONS TLE2081Y UNIT MIN TYP MAX VIO Input offset voltage VIC = 0, VO = 0, RS = 50 Ω 0.49 6 mV IIO Input offset current VIC = 0 VO = 0 See Figure 4 6 100 pA IIB Input bias current 0, 0, 20 175 15 15 VICR Common-mode input voltage range RS = 50 Ω to ICR g g S to V –11 11.9 M i iti k IO = –200 μA 13.8 14.1 VOM+ Maximum positive peak output voltage swing IO = –2 mA 13.5 13.9 V out ut IO = –20 mA 11.5 12.3 M i ti k t t IO = 200 μA –13.8 –14.2 VOM– Maximum negative peak output IO = 2 mA –13.5 –14 V voltage swing IO = 20 mA –11.5 –12.4 L i l diff ti l lt RL = 600 Ω 80 96 AVD Large-signal differential voltage amplification VO = ± 10 V RL = 2 kΩ 90 109 dB am lification RL = 10 kΩ 95 118 ri Input resistance VIC = 0 1012 Ω ci Input capacitance VIC = 0 See Figure 5 Common mode 7.5 0, pF Differential 2.5 zo Open-loop output impedance f = 1 MHz 80 Ω CMRR Common-mode rejection ratio VIC = VICRmin, VO = 0, RS = 50 Ω 80 98 dB kSVR Supply-voltage rejection ratio (ΔVCC± /ΔVIO) VCC±= ±5 V to ±15 V, VO = 0, RS = 50 Ω 82 99 dB ICC Supply current VO = 0, No load 1.35 1.7 2.2 mA I Short circuit output current V 0 VID = 1 V –30 –45 IOS Short-VO = mA VID = –1 V 30 48 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 22 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082C TLE2082AC TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.9 6 0.65 4 mV VIC = 0, VO = 0, Full range 8.1 5.1 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 2.3 25 2.3 25 μV/°C IIO Input offset current 25°C 5 100 5 100 pA VIC = 0, VO = 0, Full range 1.4 1.4 nA IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 pA Full range 5 5 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to to –0.9 –0.9 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.7 3.7 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.4 3.4 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.5 1.5 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.7 –3.7 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.4 –3.4 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.5 –1.5 RL = 600 Ω 25°C 80 91 80 91 Full range 79 79 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 89 89 RL = 10 kΩ 25°C 95 106 95 106 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input Common mode VIC = 0 See Figure 5 25°C 11 11 pF In ut capacitance Differential 0, 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common mode rejection ratio VIC = VICRmin, 25°C 70 89 70 89 Common-IC ICR dB , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio(ΔVCC± /ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 ICC Supply current VO = 0 No load 25°C 2.7 2.9 3.9 2.7 2.9 3.9 mA y (both channels) 0, Full range 3.9 3.9 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 23 TLE2082C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2082C TLE2082AC TA UNIT MIN TYP MAX MIN TYP MAX Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB IOS Short circuit output current VO = 0 VID = 1 V 25°C –35 –35 Short-mA VID = –1 V 45 45 TLE2082C operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2082C TLE2082AC TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD = 1 RL = 2 kΩ Full range 22 22 V/μs –1, kΩ, = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate CL F, Full range 22 22 V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1Hz to 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(VD RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 24 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082C TLE2082AC TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 1.1 7 0.7 4 mV VIC = 0, VO = 0, Full range 8.1 5.1 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 2.4 25 2.4 25 μV/°C IIO Input offset current 25°C 6 100 6 100 pA VIC = 0, VO = 0, Full range 1.4 1.4 nA IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 pA Full range 5 5 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to to –10.9 –10.9 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.6 13.6 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.4 13.4 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.5 11.5 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.7 –13.7 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.4 –13.4 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.5 –11.5 RL = 600 Ω 25°C 80 96 80 96 Full range 79 79 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 89 89 RL = 10 kΩ 25°C 95 118 95 118 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance Common mode VIC = 0, See Figure 5 25°C 7.5 7.5 i ca acitance pF Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 79 79 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 81 81 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 25 TLE2082C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2082C TLE2082AC TA UNIT MIN TYP MAX MIN TYP MAX Supply current 25°C 2.7 3.1 3.9 2.7 3.1 3.9 ICC (both channels) VO = 0, No load Full range 3.9 3.9 mA Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB IOS Short circuit output current VO = 0 VID = 1 V 25°C –30 –45 –30 –45 Short-mA VID = –1 V 30 48 30 48 TLE2082C operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2082C TLE2082AC TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 28 40 28 40 SR+ Positive slew rate VO(PP) = 10 V, AVD = –1, RL = 2 kΩ CL = 100 pF Full range 25 25 V/μs kΩ, pF, Figure 1 25°C 30 45 30 45 SR– Negative slew rate See Full range 25 25 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 V Peak-to-peak equivalent S , See Figure 3 10 kHz 25°C VN(PP) V Peak to eak input noise voltage f = 0.1 Hz to 0 6 0 6 μV 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz Total harmonic distortion VO(PP) = 20 V, AVD = 10, THD + N kHz kΩ 0 008% 0 008% plus noise f = 1 kHz, RL = 2 kΩ, RS = 25 Ω 25°C 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8 10 8 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478 637 478 637 kHz g bandwidth O(VD RL = 2 kΩ, CL = 25 pF φ Phase margin at VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g unity gain I , L , CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 26 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082I electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082I TLE2082AI TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.9 7 0.65 4 mV VIC = 0, VO = 0, Full range 8.5 5.5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 2.4 25 2.4 25 μV/°C IIO Input offset current 25°C 5 100 5 100 pA VIC = 0, VO = 0, Full range 5 5 nA IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 pA Full range 10 10 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to to –0.8 –0.8 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.7 3.7 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.4 3.4 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.5 1.5 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.7 –3.7 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.4 –3.4 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.5 –1.5 RL = 600 Ω 25°C 80 91 80 91 Full range 79 79 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 89 89 RL = 10 kΩ 25°C 95 106 95 106 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input Common mode VIC = 0, 25°C 11 11 pF In ut capacitance Differential IC , See Figure 5 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common mode rejection ratio VIC = VICRmin, 25°C 70 89 70 89 Common-IC ICR dB , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection ratio VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j (ΔVCC±/ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 ICC Supply current VO = 0 No load 25°C 2.7 2.9 3.9 2.7 2.9 3.9 mA y (both channels) 0, Full range 3.9 3.9 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 27 TLE2082I electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2082I TLE2082AI TA UNIT MIN TYP MAX MIN TYP MAX Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB IOS Short circuit output current VO = 0 VID = 1 V 25°C –35 –35 Short-mA VID = –1 V 45 45 TLE2082I operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2082I TLE2082AI TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD = 1 RL = 2 kΩ Full range 20 20 V/μs –1, kΩ, = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate CL F, Full range 20 20 V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(VD RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 † Full range is 40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 28 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082I electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082I TLE2082AI TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 1.1 7 0.7 4 mV VIC = 0, VO = 0, Full range 8.5 5.5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 2.4 25 2.4 25 μV/°C IIO Input offset current 25°C 6 100 6 100 pA VIC = 0, VO = 0, Full range 5 5 nA IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 pA Full range 10 10 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to to –10.8 –10.8 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.7 13.7 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.4 13.4 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.5 11.5 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.7 –13.7 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.4 –13.4 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.5 –11.5 RL = 600 Ω 25°C 80 96 80 96 Full range 79 79 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 89 89 RL = 10 kΩ 25°C 95 118 95 118 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance Common mode VIC = 0, See Figure 5 25°C 7.5 7.5 i ca acitance pF Differential IC , g 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 dB rejection ratio IC ICR , VO = 0, RS = 50 Ω Full range 79 79 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC± /ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 29 TLE2082I electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2082I TLE2082AI TA UNIT MIN TYP MAX MIN TYP MAX Supply current 25°C 2.7 3.1 3.9 2.7 3.1 3.9 ICC (both channels) VO = 0, No load Full range 3.9 3.9 mA Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB IOS Short circuit output current VO = 0 VID = 1 V 25°C –30 –45 –30 –45 Short-mA VID = –1 V 30 48 30 48 TLE2082I operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2082I TLE2082AI TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 28 40 28 40 SR+ Positive slew rate VO(PP) = 10 V, AVD = –1, RL = 2 kΩ CL = 100 pF Full range 22 22 V/μs kΩ, pF, Figure 1 25°C 30 45 30 45 SR– Negative slew rate See Full range 22 22 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic distortion VO(PP) = 20 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 008% 0 008% plus noise = kHz, = kΩ, RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8 10 8 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478 637 478 637 kHz g bandwidth O(VD RL = 2 kΩ, CL = 25 pF φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g y gain I L CL = 25 pF, See Figure 2 † Full range is –40°C to 85°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 30 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 0.9 7 0.65 4 mV VIC = 0, VO = 0, Full range 9.5 6.5 αVIO Temperature coefficient of input offset voltage RS= 50Ω Full range 2.3 25∗ 2.3 25∗ μV/°C IIO Input offset current 25°C 5 100 5 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC , O , See Figure 4 25°C 15 175 15 175 pA Full range 60 60 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 V voltage range 5 5 Full range to to –0.8 –0.8 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.6 3.6 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ V output voltage swing –Full range 3.3 3.3 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.4 1.4 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.6 –3.6 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.3 –3.3 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.4 –1.4 RL = 600 Ω 25°C 80 91 80 91 Full range 78 78 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 88 88 RL = 10 kΩ 25°C 95 106 95 106 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capaci Common mode VIC = 0 See Figure 5 25°C 11 11 capaci- pF tance Differential 0, 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common mode rejection ratio VIC = VICRmin, 25°C 70 89 70 89 Common-IC ICR dB , VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection ratio VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j (ΔVCC± /ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 31 TLE2082M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX Supply current 25°C 2.7 2.9 3.6 2.7 2.9 3.6 ICC (both channels) VO = 0, No load Full range 3.6 3.6 mA Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB IOS Short circuit output current VO = 0 VID = 1 V 25°C –35 –35 Short-mA VID = –1 V 45 45 † Full range is –55°C to 125°C. TLE2082M operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, 1 kΩ Full range 18∗ 18∗ V/μs AVD = –1, RL = 2 kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 18∗ 18∗ V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz THD + N Total harmonic VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% distortion plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(VD RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 32 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C 1.1 7 0.7 4 mV VIC = 0, VO = 0, Full range 9.5 6.5 αVIO Temperature coefficient of input offset voltage RS= 50 Ω Full range 2.4 25∗ 2.4 25∗ μV/°C IIO Input offset current 25°C 6 100 6 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC , O , See Figure 4 25°C 20 175 20 175 pA Full range 65 65 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 V voltage range 15 15 Full range to to –10.8 –10.8 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.6 13.6 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ V output voltage swing –Full range 13.3 13.3 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.4 11.4 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.6 –13.6 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.3 –13.3 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.4 –11.4 RL = 600 Ω 25°C 80 96 80 96 Full range 78 78 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 88 88 RL = 10 kΩ 25°C 95 118 95 118 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance Common mode VIC = 0, See Figure 5 25°C 7.5 7.5 i ca acitance pF Differential IC , g 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode rejection VIC = VICRmin, 25°C 80 98 80 98 dB j ratio IC ICR , VO = 0, RS = 50 Ω Full range 78 78 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± , VO = 0, RS = 50 Ω Full range 80 80 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 33 TLE2082M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX Supply current 25°C 2.7 3.1 3.6 2.7 3.1 3.6 ICC (both channels) VO = 0, No load Full range 3.6 3.6 mA Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 † Full range is –55°C to 125°C. TLE2082M operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2082M TLE2082AM TA† UNIT MIN TYP MAX MIN TYP MAX 25°C 28 40 28 40 SR+ Positive slew rate VO(PP) = 10 V, AVD = –1, kΩ pF Full range 20 20 V/μs RL = 2 kΩ, CL = 100 pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate Full range 20 20 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts μs , RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA/√Hz Total harmonic distortion VO(PP) = 20 V, AVD = 10, THD + N kHz kΩ 0 008% 0 008% plus noise f = 1 kHz, RL = 2 kΩ, RS = 25 Ω 25°C 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8∗ 10 8∗ 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478∗ 637 478∗ 637 kHz g bandwidth O(VD RL = 2 kΩ, CL = 25 pF φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g y gain I L CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 34 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2082Y electrical characteristics at VCC± = ±15 V, TA = 25°C PARAMETER TEST CONDITIONS TLE2082Y UNIT MIN TYP MAX VIO Input offset voltage VIC = 0, VO = 0, RS = 50 Ω 1.1 6 mV IIO Input offset current VIC = 0 VO = 0 See Figure 4 6 100 pA IIB Input bias current 0, 0, 20 175 pA 15 15 VICR Common-mode input voltage range RS = 50 Ω to to V –11 11.9 IO = –200 μA 13.8 14.1 VOM+ Maximum positive peak output voltage swing IO = –2 mA 13.5 13.9 V IO = –20 mA 11.5 12.3 IO = 200 μA –13.8 –14.2 VOM– Maximum negative peak output voltage swing IO = 2 mA –13.5 –14 V IO = 20 mA –11.5 –12.4 RL = 600 Ω 80 96 AVD Large-signal differential voltage amplification VO = ± 10 V RL = 2 kΩ 90 109 dB RL = 10 kΩ 95 118 ri Input resistance VIC = 0 1012 Ω ci Input capacitance Common mode VO = 0 See Figure 5 7.5 pF Differential 0, 2.5 zo Open-loop output impedance f = 1 MHz 80 Ω CMRR Common-mode rejection ratio VIC = VICRmin, VO = 0, RS = 50 Ω 80 98 dB kSVR Supply-voltage rejection ratio (ΔVCC± /ΔVIO) VCC± = ±5 V to ±15 V, VO = 0, RS = 50 Ω 82 99 dB ICC Supply current (both channels) VO = 0, No load 2.7 3.1 3.9 mA IOS Short circuit output current VO = 0 VID = 1 V –30 –45 Short-mA VID = –1 V 30 48 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 35 TLE2084C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C –1.6 7 –0.5 4 mV VIC = 0, VO = 0, Full range 9.1 6.1 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 10.1 30 10.1 30 μV/°C IIO Input offset current 25°C 15 100 15 100 pA VIC = 0, VO = 0, Full range 1.4 1.4 nA IIB Input bias current IC O See Figure 4 25°C 20 175 20 175 pA Full range 5 5 nA 25°C 5 to 5 to 5 to 5 to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 voltage range V Full range 5 to 5 to –0.9 –0.9 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.7 3.7 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ output voltage swing –V Full range 3.4 3.4 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.5 1.5 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 Full range –3.7 –3.7 VOM Maximum negative peak IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– V g output voltage swing Full range –3.4 –3.4 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.5 –1.5 RL = 600 Ω 25°C 80 91 80 91 Full range 79 79 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 89 89 RL = 10 kΩ 25°C 95 106 95 106 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, Common mode 25°C 11 11 IC pF See Figure 5 Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 70 89 70 89 rejection ratio dB IC ICR VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC± /ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 ICC Supply current VO = 0 No load 25°C 5.2 6.3 7.5 5.2 6.3 7.5 mA y ( four amplifiers ) 0, Full range 7.5 7.5 ax Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 36 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2084C electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX I Short-circuit output V 0 VID = 1 V 25°C –35 –35 IOS current VO = mA VID = –1 V 45 45 † Full range is 0°C to 70°C. TLE2084C operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, 1 kΩ Full range 22 22 V/μs AVD = –1, RL = 2 kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 22 22 V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts R μs L = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent See Figure 3 10 kHz 25°C input noise voltage μV f = 0.1Hz to 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA /√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f = 1 kHz RL = 2 kΩ 25°C 0 013% 0 013% plus noise kHz, kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I L 25°C 9 4 9 4 MHz CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(VD RL = 2 kΩ , CL = 25 pF 2.8 2.8 φm Phase margin at unity VI = 10 mV, RL = 2 kΩ, 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 37 TLE2084C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C –1.6 7 –0.5 4 mV VIC = 0, VO = 0, Full range 9.1 6.1 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 10.1 30 10.1 30 μV/°C IIO Input offset current 25°C 15 100 15 100 pA VIC = 0, VO = 0, Full range 1.4 1.4 nA IIB Input bias current IC O See Figure 4 25°C 25 175 25 175 pA Full range 5 5 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 voltage range V 15 15 Full range to to –10.9 –10.9 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.7 13.7 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ output voltage swing –V Full range 13.4 13.4 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.5 11.5 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 M i ti Full range –13.7 –13.7 VOM Maximum negative peak output voltage IO = 2 mA 25°C –13.7 –14 –13.7 –14 VOM– eak out ut V swing Full range –13.6 –13.6 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.5 –11.5 RL = 600 Ω 25°C 80 96 80 96 Full range 79 79 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 89 89 RL = 10 kΩ 25°C 95 118 95 118 Full range 94 94 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, Common mode 25°C 7.5 7.5 IC pF See Figure 5 Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 rejection ratio dB IC ICR VO = 0, RS = 50 Ω Full range 79 79 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± VO = 0, RS = 50 Ω Full range 81 81 ICC Supply current VO = 0 No load 25°C 5.2 6.5 7.5 5.2 6.5 7.5 mA y ( four amplifiers ) 0, Full range 7.5 7.5 ax Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 38 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2084C electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 † Full range is 0°C to 70°C. TLE2084C operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2084C TLE2084AC TA UNIT MIN TYP MAX MIN TYP MAX 25°C 25 40 25 40 SR+ Positive slew rate VO(PP) = 10 V, AVD = –1, kΩ pF Full range 22 22 V/μs RL = 2 kΩ, CL = 100 pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate Full range 25 25 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 V Peak-to-peak equivalent S , See Figure 3 10 kHz 25°C VN(PP) V Peak to eak input noise voltage f = 0.1 Hz to 0 6 0 6 μV 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA /√Hz THD + N Total harmonic distortion VO(PP) = 20 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 008% 0 008% plus noise = kHz, = kΩ, RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8 10 8 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478 637 478 637 kHz g bandwidth O(, VD , RL = 2 kΩ, CL = 25 pF φ Phase margin at VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g unity gain I L CL = 25 pF, See Figure 2 † Full range is 0°C to 70°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 39 TLE2084M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C –1.6 7 –0.5 4 mV VIC = 0, VO = 0, Full range 12.5 9.5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 10.1 30∗ 10.1 30∗ μV/°C IIO Input offset current 25°C 15 100 15 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC O See Figure 4 25°C 20 175 20 175 pA Full range 65 65 nA 5 5 5 5 25°C to to to to VICR Common-mode input RS = 50 Ω –1 –1.9 –1 –1.9 voltage range V 5 5 Full range to to –0.8 –0.8 IO = 200 μA 25°C 3.8 4.1 3.8 4.1 –Full range 3.6 3.6 VOM Maximum positive peak IO = 2 mA 25°C 3.5 3.9 3.5 3.9 VOM+ output voltage swing –V Full range 3.3 3.3 IO = 20 mA 25°C 1.5 2.3 1.5 2.3 –Full range 1.4 1.4 IO = 200 μA 25°C –3.8 –4.2 –3.8 –4.2 M i ti Full range –3.6 –3.6 VOM Maximum negative peak output voltage IO = 2 mA 25°C –3.5 –4.1 –3.5 –4.1 VOM– eak out ut V swing Full range –3.3 –3.3 IO = 20 mA 25°C –1.5 –2.4 –1.5 –2.4 Full range –1.4 –1.4 RL = 600 Ω 25°C 80 91 80 91 Full range 78 78 AVD Large-signal differential VO = ± 2 3 V RL = 2 kΩ 25°C 90 100 90 100 dB g g voltage amplification 2.3 Full range 88 88 RL = 10 kΩ 25°C 95 106 95 106 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, Common mode 25°C 11 11 IC pF See Figure 5 Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 70 89 70 89 rejection ratio dB IC ICR VO = 0, RS = 50 Ω Full range 68 68 kSVR Supply-voltage rejec- VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j tion ratio (ΔVCC± /ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 ICC Supply current VO = 0 No load 25°C 5.2 6.3 7.5 5.2 6.3 7.5 mA y ( four amplifiers ) 0, Full range 7.5 7.5 ax Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 40 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2084M electrical characteristics at specified free-air temperature, VCC± = ±5 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX I Short-circuit output V 0 VID = 1 V 25°C –35 –35 IOS current VO = mA VID = –1 V 45 45 TLE2084M operating characteristics at specified free-air temperature, VCC± = ±5 V PARAMETER TEST CONDITIONS T † TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX 25°C 35 35 SR+ Positive slew rate VO(PP) = ±2.3 V, AVD 1 RL 2 kΩ Full range 18∗ 18∗ V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 38 38 SR– Negative slew rate F, Full range 18∗ 18∗ V/μs t Settling time AVD = –1, 2-V step, To 10 mV 25°C 0.25 0.25 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 0.4 0.4 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 In Equivalent input noise current VIC = 0, f = 10 kHz 25°C 2.8 2.8 fA /√Hz THD + N Total harmonic distortion VO(PP) = 5 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 013% 0 013% plus noise = kHz, = kΩ, RS = 25 Ω 0.013% 0.013% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 9 4 9 4 MHz , L , CL = 25 pF, See Figure 2 9.4 9.4 BOM Maximum output-swing VO(PP) = 4 V, AVD = –1, 25°C 2 8 2 8 MHz g bandwidth O(, VD , RL = 2 kΩ , CL = 25 pF 2.8 2.8 φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 56° 56° g y gain I L CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 41 TLE2084M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) PARAMETER TEST CONDITIONS T † TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX VIO Input offset voltage 25°C –1.6 7 –0.5 4 mV VIC = 0, VO = 0, Full range 12.5 7.5 αVIO Temperature coefficient of input offset voltage RS = 50 Ω Full range 10.1 30∗ 10.1 30∗ μV/°C IIO Input offset current 25°C 15 100 15 100 pA VIC = 0, VO = 0, Full range 20 20 nA IIB Input bias current IC O See Figure 4 25°C 25 175 25 175 pA Full range 65 65 nA 15 15 15 15 25°C to to to to VICR Common-mode input RS = 50 Ω –11 –11.9 –11 –11.9 voltage range V 15 15 Full range to to –10.8 –10.8 IO = 200 μA 25°C 13.8 14.1 13.8 14.1 –Full range 13.6 13.6 VOM Maximum positive peak IO = 2 mA 25°C 13.5 13.9 13.5 13.9 VOM+ output voltage swing –V Full range 13.3 13.3 IO = 20 mA 25°C 11.5 12.3 11.5 12.3 –Full range 11.4 11.4 IO = 200 μA 25°C –13.8 –14.2 –13.8 –14.2 Full range –13.6 –13.6 VOM Maximum negative peak IO = 2 mA 25°C –13.5 –14 –13.5 –14 VOM– V g output voltage swing Full range –13.3 –13.3 IO = 20 mA 25°C –11.5 –12.4 –11.5 –12.4 Full range –11.4 –11.4 RL = 600 Ω 25°C 80 96 80 96 Full range 78 78 AVD Large-signal differential VO = ± 10 V RL = 2 kΩ 25°C 90 109 90 109 dB g g voltage amplification Full range 88 88 RL = 10 kΩ 25°C 95 118 95 118 Full range 93 93 ri Input resistance VIC = 0 25°C 1012 1012 Ω ci Input capacitance VIC = 0, Common mode 25°C 7.5 7.5 IC pF See Figure 5 Differential 25°C 2.5 2.5 zo Open-loop output impedance f = 1 MHz 25°C 80 80 Ω CMRR Common-mode VIC = VICRmin, 25°C 80 98 80 98 rejection ratio dB IC ICR VO = 0, RS = 50 Ω Full range 78 78 kSVR Supply-voltage rejection VCC± = ±5 V to ±15 V, 25°C 82 99 82 99 dB y g j ratio (ΔVCC±/ΔVIO) CC± VO = 0, RS = 50 Ω Full range 80 80 ICC Supply current VO = 0 No load 25°C 5.2 6.5 7.5 5.2 6.5 7.5 mA y ( four amplifiers ) 0, Full range 7.5 7.5 ax Crosstalk attenuation VIC = 0, RL = 2 kΩ 25°C 120 120 dB ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 42 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TLE2084M electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted) (continued) PARAMETER TEST CONDITIONS T TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX I Short-circuit output V 0 VID = 1 V 25°C –30 –45 –30 –45 IOS current VO = mA VID = –1 V 30 48 30 48 TLE2084M operating characteristics at specified free-air temperature, VCC± = ±15 V PARAMETER TEST CONDITIONS T † TLE2084M TLE2084AM TA UNIT MIN TYP MAX MIN TYP MAX 25°C 25 40 25 40 SR+ Positive slew rate VO(PP) = 10 V, AVD 1 RL 2 kΩ Full range 17 17 V/μs = –1, = kΩ, CL = 100 pF, See Figure 1 25°C 30 45 30 45 SR– Negative slew rate F, Full range 20 20 V/μs t Settling time AVD = –1, 10-V step, To 10 mV 25°C 0.4 0.4 ts , μs RL = 1 kΩ, CL = 100 pF To 1 mV 1.5 1.5 V Equivalent input noise f = 10 Hz 25°C 28 28 Vn nV/√Hz q voltage f = 10 kHz 11.6 11.6 RS = 20 Ω, f = 10 Hz to 6 6 VN(PP) Peak-to-peak equivalent S See Figure 3 10 kHz 25°C μV q input noise voltage f = 0.1 Hz to 0 6 0 6 10 Hz 0.6 0.6 I Equivalent input noise In VIC = 0 f = 10 kHz 25°C 2 8 2 8 fA/√Hz q current 0, 2.8 2.8 fA /√THD + N Total harmonic distortion VO(PP) = 20 V, AVD = 10, f 1 kHz RL 2 kΩ 25°C 0 008% 0 008% plus noise = kHz, = kΩ, RS = 25 Ω 0.008% 0.008% B1 Unity gain bandwidth VI = 10 mV, RL = 2 kΩ, Unity-I 25°C 8∗ 10 8∗ 10 MHz , L , CL = 25 pF, See Figure 2 BOM Maximum output-swing VO(PP) = 20 V, AVD = –1, 25°C 478∗ 637 478∗ 637 kHz g bandwidth O(, VD , RL = 2 kΩ, CL = 25 pF φ Phase margin at unity VI = 10 mV, RL = 2 kΩ, φm 25°C 57° 57° g y gain I , L , CL = 25 pF, See Figure 2 ∗On products compliant with MIL-PRF-38535, Class B, this parameter is not production tested. † Full range is –55°C to 125°C. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 43 TLE2084Y electrical characteristics at VCC± = ±15 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS TLE2084Y UNIT MIN TYP MAX VIO Input offset voltage VIC = 0, VO = 0, RS = 50 Ω 7 mV IIO Input offset current VIC = 0, VO = 0, 15 100 pA IIB Input bias current IC O See Figure 4 25 175 pA 15 15 VICR Common-mode input voltage range RS = 50 Ω to to V –11 11.9 IO = –200 μA 13.8 14.1 VOM+ Maximum positive peak output voltage swing IO = –2 mA 13.5 13.9 V IO = –20 mA 11.5 12.3 IO = 200 μA –13.8 –14.2 VOM– Maximum negative peak output voltage swing IO = 2 mA –13.5 –14 V IO = 20 mA –11.5 –12.4 RL = 600 Ω 80 96 AVD Large-signal differential voltage amplification VO = ± 10 V RL = 2 kΩ 90 109 dB RL = 10 kΩ 95 118 ri Input resistance VIC = 0 1012 Ω ci Input capacitance VIC = 0, Common mode 7.5 IC pF See Figure 5 Differential 2.5 zo Open-loop output impedance f = 1 MHz 80 Ω CMRR Common-mode rejection ratio VIC = VICRmin, VO = 0, RS = 50 Ω 80 98 dB kSVR Supply-voltage rejection ratio (ΔVCC± /ΔVIO) VCC± = ±5 V to ±15 V, VO = 0, RS = 50 Ω 82 99 dB ICC Supply current ( four amplifiers ) VO = 0, No load 5.2 6.5 7.5 mA IOS Short circuit output current VO = 0 VID = 1 V –30 –45 Short-mA VID = –1 V 30 48 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 44 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION – + 2 kΩ 2 kΩ RL CL† VO VCC+ VCC+ VI – + 10 kΩ VO CL† 100Ω RL VCC+ VCC+ VI † Includes fixture capacitance † Includes fixture capacitance Figure 1. Slew-Rate Test Circuit Figure 2. Unity-Gain Bandwidth and Phase-Margin Test Circuit † Includes fixture capacitance – + – + 2 kΩ VCC+ VCC+ VO VO VCC– RS RS VCC– Ground Shield Picoammeters Figure 3. Noise-Voltage Test Circuit Figure 4. Input-Bias and Offset- Current Test Circuit – + VCC+ VO VCC– IN– IN+ Cic Cic Cid Figure 5. Internal Input Capacitance typical values Typical values presented in this data sheet represent the median (50% point) of device parametric performance. input bias and offset current At the picoampere bias-current level typical of the TLE208x and TLE208xA, accurate measurement of the bias becomes difficult. Not only does this measurement require a picoammeter, but test socket leakages can easily exceed the actual device bias currents. To accurately measure these small currents, Texas Instruments uses a two-step process. The socket leakage is measured using picoammeters with bias voltages applied but with no device in the socket. The device is then inserted in the socket and a second test is performed that measures both the socket leakage and the device input bias current. The two measurements are then subtracted algebraically to determine the bias current of the device. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 45 TYPICAL CHARACTERISTICS Table of Graphs FIGURE VIO Input offset voltage Distribution 6, 7, 8 αVIO Input offset voltage temperature coefficient Distribution 9, 10, 11 IIO Input offset current vs Free-air temperature 12 – 15 IIB Input bias current vs Free-air temperature 12 – 15 vs Supply voltage 16 VICR Common-mode input voltage range vs Free-air temperature 17 VID Differential input voltage vs Output voltage 18, 19 vs Output current 20, 21 VOM+ Maximum positive peak output voltage vs Free-air temperature , OM+ g 24, 25 vs Supply voltage 26 vs Output current 22, 23 VOM– Maximum negative peak output voltage vs Free-air temperature , OM g g 24, 25 vs Supply voltage 26 VO(PP) Maximum peak-to-peak output voltage vs Frequency 27 VO Output voltage vs Settling time 28 AVD Large signal differential voltage amplification vs Load resistance 29 Large-vs Free-air temperature 30, 31 AVD Small-signal differential voltage amplification vs Frequency 32, 33 CMRR Common mode rejection ratio vs Frequency 34 Common-q y vs Free-air temperature 35 kSVR Supply voltage rejection ratio vs Frequency 36 Supply-q y vs Free-air temperature 37 vs Supply voltage 38, 39, 40 ICC Supply current y g vs Free-air temperature , , CC y 41, 42, 43 vs Differential input voltage 44 – 49 vs Supply voltage 50 IOS Short-circuit output current y g OS vs Elapsed time 51 vs Free-air temperature 52 vs Free-air temperature 53, 54 SR Slew rate vs Load resistance , 55 vs Differential input voltage 56 Vn Equivalent input noise voltage vs Frequency 57 V Input referred noise voltage vs Noise bandwidth frequency 58 Vn Input-q y Over a 10-second time interval 59 Third-octave spectral noise density vs Frequency bands 60 THD +N Total harmonic distortion plus noise vs Frequency 61, 62 B1 Unity-gain bandwidth vs Load capacitance 63 Gain bandwidth product vs Free-air temperature 64 Gain-vs Supply voltage 65 Gain margin vs Load capacitance 66 vs Free-air temperature 67 φm Phase margin vs Supply voltage 68 vs Load capacitance 69 Phase shift vs Frequency 32, 33 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 46 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Table of Graphs (Continued) FIGURE Noninverting large-signal pulse response vs Time 70 Small-signal pulse response vs Time 71 zo Closed-loop output impedance vs Frequency 72 ax Crosstalk attenuation vs Frequency 73 Figure 6 15 12 6 3 0 27 9 – 4 – 2.4 – 0.8 0.8 Percentage of Units – % 21 18 24 DISTRIBUTION OF TLE2081 INPUT OFFSET VOLTAGE 30 2.4 4 VIO – Input Offset Voltage – mV VCC = ±15 V TA = 25°C P Package Figure 7 VIO – Input Offset Voltage – mV 10 8 4 2 0 18 6 – 4 – 2.4 – 0.8 0.8 Percentage of Units – % 14 12 16 DISTRIBUTION OF TLE2082 INPUT OFFSET VOLTAGE 20 2.4 4 600 Units Tested From One Wafer Lot VCC = ±15 V TA = 25°C P Package – 3.2 – 1.6 0 1.6 3.2 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 47 TYPICAL CHARACTERISTICS Figure 8 VIO – Input Offset Voltage – mV 25 20 10 5 0 45 15 – 8 – 4.8 – 1.6 1.6 Percentage of Units – % 35 30 40 DISTRIBUTION OF TLE2084 INPUT OFFSET VOLTAGE 50 4.8 8 TA = 25°C N Package VCC± = ±15 V Figure 9 15 12 6 3 0 27 9 – 40 – 32 – 24 –16 – 8 0 8 Percentage of Amplifiers – % 21 18 24 DISTRIBUTION OF TLE2081 INPUT OFFSET VOLTAGE TEMPERATURE COEFFICIENT 30 16 24 32 40 VCC = ±15 V TA = – 55 °C to 125°C P Package αVIO – Temperature Coefficient – μV/°C Figure 10 15 12 6 3 0 27 9 – 30 – 24 –18 –12 – 6 0 6 Percentage of Amplifiers – % 21 18 24 DISTRIBUTION OF TLE2082 INPUT OFFSET VOLTAGE TEMPERATURE COEFFICIENT 30 12 18 24 30 310 Amplifiers VCC = ±15 V TA = – 55°C to 125°C αVIO – Temperature Coefficient – μV/°C P Package Figure 11 15 12 6 3 0 27 9 – 40 – 32 – 24 –16 – 8 0 8 Percentage of Amplifiers – % 21 18 24 DISTRIBUTION OF TLE2084 INPUT OFFSET VOLTAGE TEMPERATURE COEFFICIENT 30 16 24 32 40 VCC± = ±15 V TA = – 55°C to 125°C N Package αVIO – Temperature Coefficient – μV/°C TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 48 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 12 IIB and – Input Bias and Input Offset Currents – nA 0.01 0.001 25 45 100 65 85 105 125 0.1 1 10 IIO VCC± = ±5 V VIC = 0 VO = 0 IIB IIO –75 –55 –35 –15 –5 TA – Free-Air Temperature – °C TLE2081 AND TLE2082 INPUT BIAS CURRENT AND INPUT OFFSET CURRENT vs FREE-AIR TEMPERATURE Figure 13 and IIO – Input Bias and Offset Currents – nA 0.01 0.001 25 45 100 65 85 105 125 0.1 1 10 IIB IIO VCC± = ±5 V VIC = 0 VO = 0 IIB IIO –75 –55 –35 –15 –5 TA – Free-Air Temperature – °C TLE2084 INPUT BIAS CURRENT AND INPUT OFFSET CURRENT vs FREE-AIR TEMPERATURE Figure 14 25 45 65 85 105 125 0.01 0.001 100 0.1 1 10 VCC± = ±15 V VIC = 0 VO = 0 IIO IIB –75 –55 –35 –15 5 TA – Free-Air Temperature – °C IIIIBB and IIIIOO – Input Bias and Input Offset Currents – nA TLE2081 AND TLE2082 INPUT BIAS CURRENT AND INPUT OFFSET CURRENT vs FREE-AIR TEMPERATURE Figure 15 IIIIBB and IIOIO – Input Bias and Offset Currents – nA 25 45 65 85 105 125 0.01 0.001 100 0.1 1 10 VCC± = ±15 V VIC = 0 VO = 0 IIO IIB –75 –55 –35 –15 5 TA – Free-Air Temperature – °C TLE2084 INPUT BIAS CURRENT AND INPUT OFFSET CURRENT vs FREE-AIR TEMPERATURE † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 49 TYPICAL CHARACTERISTICS† Figure 16 104 103 102 100 101 106 – Input Bias Current – pA INPUT BIAS CURRENT vs TOTAL SUPPLY VOLTAGE 0 5 10 15 20 25 30 35 40 45 IIB TA = 25°C TA = –55°C 105 VICmin TA = 125°C VICmax = VCC+ VCC – Total Supply Voltage (referred to VCC–) – V Figure 17 VVIICC – Common-Mode Input Voltage Range – V 5 25 45 COMMON-MODE INPUT VOLTAGE RANGE vs FREE-AIR TEMPERATURE 65 85 105 125 RS = 50 Ω VCC+ + 0.5 VCC+ –0.5 VCC– + 3.5 VCC+ VCC– +3 VCC– + 2.5 VCC– +2 VICmin VICmax – 75 –55 –35 –15 TA – Free-Air Temperature – °C Figure 18 VVIIDD – Differential Input Voltage – uV – 5 – 4 – 3 – 2 – 10 0 1 DIFFERENTIAL INPUT VOLTAGE vs OUTPUT VOLTAGE 2 5 RL = 2 kΩ RL = 2 kΩ RL = 10 kΩ RL = 10 kΩ VCC± = ±5 V VIC = 0 RS = 50 Ω TA = 25°C RL = 600 Ω RL = 600 Ω – 100 – 200 – 300 – 400 100 200 400 300 0 3 4 VO – Output Voltage – V μV Figure 19 – 100 – 200 – 300 – 400 – 15 – 10 – 5 0 5 100 200 400 10 15 RL = 2 kΩ VCC± = ±15 V RL = 10 kΩ RL = 10 kΩ RL = 2 kΩ RL = 600 Ω RL = 600 Ω DIFFERENTIAL INPUT VOLTAGE vs OUTPUT VOLTAGE 300 0 VO – Output Voltage – V VVIIDD – Differential Input Voltage – uμVV VIC = 0 RS = 50 Ω TA = 25°C † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 50 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 20 VOM – Maximum Positive Peak Output Voltage – V 7.5 6 3 1.5 0 13.5 4.5 0 – 5 –10 –15 – 20 – 25 – 30 10.5 9 12 15 – 35 – 40 – 45 – 50 VOM+ TA = 25°C TA = 125°C TA = 85°C IO – Output Current – mA VCC± = ±15 V TA = –55°C TLE2081 AND TLE2082 MAXIMUM POSITIVE PEAK OUTPUT VOLTAGE vs OUTPUT CURRENT Figure 21 VOM – Maximum Positive Peak Output Voltage – V 6 3 0 0 – 10 – 20 – 30 9 12 15 – 40 – 50 VOM+ TA = 25°C TA = 125°C TA = 85°C IO – Output Current – mA VCC± = ±15 V TLE2084 MAXIMUM POSITIVE PEAK OUTPUT VOLTAGE vs OUTPUT CURRENT Figure 22 – Maximum Negative Peak Output Voltage – V –7.5 – 6 – 3 –1.5 0 –13.5 – 4.5 0 5 10 15 20 25 30 –10.5 – 9 –12 –15 35 40 45 50 VOM – TA = 25°C TA = 125°C TA = –55°C VCC± = ±15 V TA = 85°C IO – Output Current – mA TLE2081 AND TLE2082 MAXIMUM NEGATIVE PEAK OUTPUT VOLTAGE vs OUTPUT CURRENT Figure 23 – Maximum Negative Peak Output Voltage – V – 6 – 3 0 0 10 20 30 – 9 –12 –15 40 50 VOM – TA = 25°C TA = 125°C TA = –55°C VCC± = ±15 V TA = 85°C IO – Output Current – mA TLE2084 MAXIMUM NEGATIVE PEAK OUTPUT VOLTAGE vs OUTPUT CURRENT † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 51 TYPICAL CHARACTERISTICS† Figure 24 VOM – Maximum Peak Output Voltage – V 0 – 1 – 3 – 4 – 5 4 – 2 5 25 45 2 1 3 MAXIMUM PEAK OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE 5 65 85 105 125 VOM IO = –200 μA IO = –2 mA IO = –20 mA VCC± = ±5 V IO = 20 mA IO = 2 mA IO = 200 μA –75 –55 –35 –15 TA – Free-Air Temperature – °C Figure 25 12.5 12 11 10.5 10 14.5 11.5 5 25 45 | | – Maximum Peak Output Voltage – V 13.5 13 14 15 65 85 105 125 VOM MAXIMUM PEAK OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE IO = –20 mA IO = 20 mA IO = 2 mA IO = –200 μA IO = 200 μA VCC± = ±15 V –75 –55 –35 –15 TA – Free-Air Temperature – °C IO = –2 mA Figure 26 VOM – Maximum Peak Output Voltage – V 0 – 5 –15 – 20 – 25 20 –10 0 2.5 5 7.5 10 12.5 15 10 5 15 MAXIMUM PEAK OUTPUT VOLTAGE vs SUPPLY VOLTAGE 25 17.5 20 22.5 25 VOM IO = –200 μA IO = –2 mA IO = –20 mA IO = 20 mA IO = 200 μA IO = 2 mA TA = 25°C |VCC±| – Supply Voltage – V Figure 27 PP) – Maximum Peak-to-Peak Output Voltage – V 20 5 0 30 10 25 100 k 1 M 10 M f – Frequency – Hz VO(PP) 15 MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE vs FREQUENCY TA = –55°C TA = 25°C, 125°C TA = 25°C, 125°C TA = –55°C VCC± = ±15 V RL = 2 kΩ VCC± = ±5 V † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 52 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 28 0 0.5 1 1.5 2 – Output Voltage – V OUTPUT VOLTAGE vs SETTLING TIME VO VCC± = ±15 V RL = 1 kΩ CL = 100 pF AV = –1 TA = 25°C 1 mV 1 mV Rising Falling 10 mV 10 mV – 2.5 – 10 – 12.5 10 12.5 – 5 7.5 2.5 – 7.5 5 0 ts – Settling Time – μs Figure 29 LARGE-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION vs LOAD RESISTANCE 115 110 100 95 90 125 105 0.1 1 10 100 120 VCC± = ±15 V VIC = 0 RS = 50 Ω TA = 25°C RL – Load Resistance – kΩ VCC± = ±5 V – Large-Signal Differential ÁÁ ÁÁ AVD Voltage Amplification – dB Figure 30 TA – Free-Air Temperature – °C 95 92 86 83 80 107 89 – 75 – 55 – 35 –15 5 25 45 101 98 104 LARGE-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION vs FREE-AIR TEMPERATURE 110 65 85 105 125 RL = 10 kΩ RL = 2 kΩ VCC± = ±5 V RL = 600 Ω VO = ±2.3 V – Large-Signal Differential ÁÁ ÁÁ AVD Voltage Amplification – dB Figure 31 – 55 – 35 –15 105 125 105 101 93 89 85 121 97 113 109 117 125 LARGE-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION vs FREE-AIR TEMPERATURE RL = 10 kΩ – 75 5 25 45 65 85 TA – Free-Air Temperature – °C RL = 600 Ω RL = 2 kΩ VCC± = ±15 V VO = ±10 V – Large-Signal Differential ÁÁ ÁÁ AVD Voltage Amplification – dB † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 53 TYPICAL CHARACTERISTICS 60 20 0 – 40 1 10 100 1 k 10 k 100 k 100 120 f – Frequency – Hz SMALL-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT vs FREQUENCY 140 1 M 10 M 100 M 80 40 Gain Phase Shift – 20 140° 120° 100° 80° 60° 40° 20° 0° Phase Shift 180° 160° VCC± = ±15 V RL = 2 kΩ CL = 100 pF TA = 25°C AVD – Small-Signal Differential Voltage Amplification – dB Figure 32 – 10 – 20 30 1 4 10 40 100 f – Frequency – MHz SMALL-SIGNAL DIFFERENTIAL VOLTAGE AMPLIFICATION AND PHASE SHIFT vs FREQUENCY 20 10 0 CL = 100 pF CL = 25 pF VCC± = ± 15 V Phase Shift Gain 80° 120° 100° 140° 160° 180° Phase Shift CL = 100 pF CL = 25 pF VIC = 0 RC = 2 kΩ TA = 25°C AVD – Small-Signal Differential Voltage Amplification – dB Figure 33 TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 54 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 34 10 100 1 k 10 k CMRR – Common-Mode Rejection Ratio – dB f – Frequency – Hz COMMON-MODE REJECTION RATIO vs FREQUENCY 100 k 1 M 10 M VCC± = ±15 V VCC± = ±5 V VIC = 0 VO = 0 RS = 50 Ω TA = 25°C 50 40 20 10 0 90 30 70 60 80 100 Figure 35 TA – Free-Air Temperature – °C 85 82 76 73 70 97 79 – 75 – 55 – 35 –15 5 25 45 CMRR – Common-Mode Rejection Ratio – dB 91 88 94 100 65 85 105 125 VO = 0 RS = 50 Ω VCC± = ±5 V VCC± = ±15 V COMMON-MODE REJECTION RATIO vs FREE-AIR TEMPERATURE VIC = VICRmin Figure 36 kX SXVXRX – Supply-Voltage Rejection Ratio – dB SUPPLY-VOLTAGE REJECTION RATIO vs FREQUENCY 40 20 0 – 20 10 100 1 k 10 k 100 k 60 80 f – Frequency – Hz 100 1 M 10 M 120 kSVR+ kSVR– ΔVCC± = ±5 V to ±15 V VIC = 0 VO = 0 RS = 50 Ω TA = 25°C Figure 37 TA – Free-Air Temperature – °C 90 84 72 66 60 114 78 – 75 – 55 – 35 –15 5 25 45 102 96 108 120 65 85 105 125 SUPPLY-VOLTAGE REJECTION RATIO vs FREE-AIR TEMPERATURE kSVR+ kSVR– kX SXVXRX – Supply-Voltage Rejection Ratio – dB ΔVCC± = ±5 V to ±15 V VIC = 0 VO = 0 RS = 50 Ω † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 55 TYPICAL CHARACTERISTICS† Figure 38 |VCC±| – Supply Voltage – V ICC – Supply Current – mA 2 1.6 0.8 0.4 0 3.6 1.2 0 2 4 6 8 10 12 2.8 2.4 3.2 4 14 16 18 20 ICC TA = 25°C TA = –55°C TA = 125°C VIC = 0 VO = 0 No Load TLE2081 SUPPLY CURRENT vs SUPPLY VOLTAGE Figure 39 |VCC±| – Supply Voltage – V ICC – Supply Current – mA 3 2.8 2.4 2.2 2 3.8 2.6 0 2.5 5 7.5 10 12.5 15 3.4 3.2 3.6 4 17.5 20 22.5 25 ICC TA = 25°C TA = –55°C TA = 125°C VIC = 0 VO = 0 No Load TLE2082 SUPPLY CURRENT vs SUPPLY VOLTAGE Figure 40 |VCC±| – Supply Voltage – V ICC – Supply Current – mA 4 2 0 0 2 4 6 8 10 12 6 8 10 14 16 18 20 ICC VIC = 0 VO = 0 No Load TA = –55°C TA = 25°C TA = 125°C TLE2084 SUPPLY CURRENT vs SUPPLY VOLTAGE Figure 41 TA – Free-Air Temperature – °C 2 1.6 0.8 0.4 0 3.6 1.2 – 75 – 55 – 35 – 15 5 25 45 ICC – Supply Current – mA 2.8 2.4 3.2 4 65 85 105 125 ICC VIC = 0 VO = 0 No Load VCC± = ±15 V VCC± = ±5 V TLE2081 SUPPLY CURRENT vs FREE-AIR TEMPERATURE † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 56 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 42 TA – Free-Air Temperature – °C 3 2.9 2.7 2.6 2.5 3.4 2.8 – 75 – 55 – 35 –15 5 25 45 ICC – Supply Current – mA 3.2 3.1 3.3 3.5 65 85 105 125 ICC VIC = 0 VO = 0 No Load VCC± = ±15 V VCC± = ±5 V TLE2082 SUPPLY CURRENT vs FREE-AIR TEMPERATURE Figure 43 TA – Free-Air Temperature – °C 7 5 6 –75 – 55 – 35 –15 5 25 45 ICC – Supply Current – mA 8 9 10 65 85 105 125 ICC VIC = 0 VO = 0 No Load VCC± = ±15 V VCC± = ±5 V TLE2084 SUPPLY CURRENT vs FREE-AIR TEMPERATURE Figure 44 VID – Differential Input Voltage – V – Supply Current – mA – 0.5 – 0.25 0 0.25 0.5 0 6 8 10 12 ICC VCC+ = 5 V VCC– = 0 VIC = + 4.5 V TA = 25°C Open Loop No Load 4 2 TLE2081 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE Figure 45 VID – Differential Input Voltage – V – Supply Current – mA – 0.5 – 0.25 0 0.25 0.5 0 6 8 10 12 14 ICC VCC+ = 5 V VCC– = 0 VIC = 4.5 V TA = 25°C Open Loop No Load 4 2 TLE2082 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 57 TYPICAL CHARACTERISTICS Figure 46 VID – Differential Input Voltage – V – Supply Current – mA – 0.5 – 0.25 0 0.25 0.5 0 6 8 10 12 14 ICC 4 2 VCC+ = 5 V VCC– = 0 VIC = 4.5 V TA = 25°C Open Loop No Load 16 18 20 TLE2084 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE Figure 47 VID – Differential Input Voltage – V 10 5 0 –1.5 – 0.9 – 0.3 0 1.5 – Supply Current – mA 15 20 25 ICC 13 8 3 18 23 0.3 0.9 VCC± = ±15 V VIC = 0 TA = 25°C Open Loop No Load TLE2081 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE Figure 48 VID – Differential Input Voltage – V 10 5 0 –1.5 –1 – 0.5 0 0.5 1 1.5 – Supply Current – mA 15 20 25 ICC VCC± = ±15 V VIC = 0 TA = 25°C Open Loop No Load TLE2082 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE Figure 49 VID – Differential Input Voltage – V 8 4 0 –1.5 – 0.3 0 0.9 1.2 1.5 – Supply Current – mA 12 16 20 ICC VCC± = ±15 V 28 24 32 36 40 –1.2 – 0.9 – 0.6 0.3 0.6 VIC = 0 TA = 25°C Open Loop No Load TLE2084 SUPPLY CURRENT vs DIFFERENTIAL INPUT VOLTAGE TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 58 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 50 – Short-Circuit Output Current – mA 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 0 –12 – 36 – 48 – 60 48 – 24 24 12 36 SHORT-CIRCUIT OUTPUT CURRENT vs SUPPLY VOLTAGE 60 IOS VO = 0 TA = 25°C VID = –1 V VID = 1 V |VCC±| – Supply Voltage – V Figure 51 IOS – Short-Circuit Output Current – mA 10 –10 – 20 – 50 0 60 120 30 40 t – Elapsed Time – s 50 180 20 0 SHORT-CIRCUIT OUTPUT CURRENT vs ELAPSED TIME VCC± = ±15 V VID = –1 V VID = 1 V – 30 – 40 VO = 0 TA = 25°C Figure 52 TA – Free-Air Temperature – °C IOS – Short-Circuit Output Current – mA 0 – 16 – 48 – 64 – 80 64 – 32 – 75 – 55 – 35 –15 5 25 45 32 16 48 SHORT-CIRCUIT OUTPUT CURRENT vs FREE-AIR TEMPERATURE 80 65 85 105 125 IOS VCC± = ±15 V VCC± = ±15 V VCC± = ±5 V VCC± = ±5 V VID = –1 V VID = 1 V VO = 0 Figure 53 TA – Free-Air Temperature – °C SR – Slew Rate – xs 35 33 29 27 25 43 31 – 75 – 55 – 35 –15 5 25 45 39 37 41 SLEW RATE vs FREE-AIR TEMPERATURE 45 65 85 105 125 V/μ s VCC± = ± 5 V RL = 2 kΩ CL = 100 pF SR– SR+ † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 59 TYPICAL CHARACTERISTICS† Figure 54 TA – Free-Air Temperature – °C 50 46 38 34 30 66 42 – 75 – 55 – 35 –15 5 25 45 SR – Slew Rate – 58 54 62 SLEW RATE vs FREE-AIR TEMPERATURE 70 65 85 105 125 V/μs VCC± = ±15 V RL = 2 kΩ CL = 100 pF SR– SR+ Figure 55 RL – Load Resistance – Ω 10 –10 0 – 20 – 50 50 – 30 100 1 k 10 k 100 k 30 20 40 SLEW RATE vs LOAD RESISTANCE VCC± = ±15 V VO± = ±10 V VCC± = ±5 V VO± = ±2.5 V Rising Edge Falling Edge – 40 SR – Slew Rate – V/μs AV = –1 CL = 100 pF TA = 25°C Figure 56 VID – Differential Input Voltage – V 50 0.1 0.4 1 4 10 SLEW RATE vs DIFFERENTIAL INPUT VOLTAGE VCC± = ±15 V VO± = ±10 V (10% – 90%) CL = 100 pF TA = 25°C Rising Edge Falling Edge 40 30 20 10 0 –10 – 20 – 30 – 40 – 50 SR – Slew Rate – V/μs AV = 1 AV = –1 AV = –1 AV = 1 Figure 57 – Equivalent Input Noise Voltage – 40 5 25 15 0 50 30 10 100 1 k 10 k 45 10 20 f – Frequency – Hz EQUIVALENT INPUT NOISE VOLTAGE vs FREQUENCY 35 Vn nV/ Hz VIC = 0 RS = 20 Ω TA = 25°C VCC± = ±15 V † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 60 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 58 0.01 1 10 100 1 k 10 k 100 k Noise Bandwidth Frequency – Hz 1 0.1 10 100 INPUT-REFERRED NOISE VOLTAGE vs NOISE BANDWIDTH FREQUENCY VCC± = ±15 V VIC = 0 RS = 20 Ω TA = 25°C Peak-to-Peak RMS VVnn – Input-Referred Noise Voltage – μV Figure 59 0.3 0 – 0.3 – 0.6 0 1 2 3 4 5 6 – Input-Referred Noise Voltage – 0.6 0.9 t – Time – s INPUT-REFERRED NOISE VOLTAGE OVER A 10-SECOND TIME INTERVAL 1.2 7 8 9 10 Vn μV VCC± = ±15 V f = 0.1 to 10 Hz TA = 25°C Figure 60 – 90 – 95 –100 –115 10 15 20 25 30 35 Third-Octave Spectral Noise Density – dB – 85 – 80 Frequency Bands THIRD-OCTAVE SPECTRAL NOISE DENSITY vs FREQUENCY BANDS – 75 40 45 VCC± = ±15 V Start Frequency: 12.5 Hz Stop Frequency: 20 kHz –105 –110 VIC = 0 TA = 25°C Figure 61 0.001 10 100 1 k 10 k 100 k THD + N – Total Harmonic Distortion + Noise – % 0.01 f – Frequency – Hz TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY 0.1 1 VCC± = ±5 V VO(PP) = 5 V TA = 25°C Filter: 10-Hz to 500-kHz Band Pass AV = 100, RL = 600 Ω AV = 100, RL = 2 kΩ AV = 10, RL = 2 kΩ AV = 10, RL = 600 Ω TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 61 TYPICAL CHARACTERISTICS† Figure 62 10 100 1 k 10 k 100 k f – Frequency – Hz 0.001 THD + N – Total Harmonic Distortion + Noise – % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY 0.01 0.1 1 Filter: 10-Hz to 500-kHz Band Pass VCC± = ±15 V VO(PP) = 20 V TA = 25°C AV = 100, RL = 600 Ω AV = 100, RL = 2 kΩ AV = 10, RL = 600 Ω AV = 10, RL = 2 kΩ Figure 63 BB11 – Unity-Gain Bandwidth – MHz 10 9 8 7 0 20 40 60 11 12 UNITY-GAIN BANDWIDTH vs LOAD CAPACITANCE 13 80 100 VCC± = ±15 V VIC = 0 VO = 0 RL = 2 kΩ TA = 25°C CL – Load Capacitance – pF Figure 64 TA – Free-Air Temperature – °C 10 9 8 7 – 75 – 55 – 35 – 15 5 25 45 Gain-Bandwidth Product – MHz 11 12 GAIN-BANDWIDTH PRODUCT vs FREE-AIR TEMPERATURE 13 65 85 105 125 f = 100 kHz VIC = 0 VO = 0 RL = 2 kΩ CL = 100 pF VCC± = ±15 V VCC± = ±5 V Figure 65 |VCC + | – Supply Voltage – V 10 9 8 7 0 5 10 15 Gain-Bandwidth Product – MHz 11 12 13 20 25 VCC ± f = 100 kHz VIC = 0 VO = 0 RL = 2 kΩ CL = 100 pF TA = 25°C GAIN-BANDWIDTH PRODUCT vs SUPPLY VOLTAGE † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 62 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS† Figure 66 Gain Margin – dB 6 4 2 0 0 20 40 60 8 GAIN MARGIN vs LOAD CAPACITANCE 10 80 100 VCC± = ±15 V VIC = 0 VO = 0 RL = 2 kΩ TA = 25°C CL – Load Capacitance – pF Figure 67 30° 20° 10° 0° 40° 50° 60° 70° 80° 90° xm – Phase Margin –75 – 55 – 35 –15 5 25 45 PHASE MARGIN vs FREE-AIR TEMPERATURE 65 85 105 φm VCC± = ±15 V VCC± = ±15 V VCC± = ±5 V VCC± = ±5 V 125 VIC = 0 VO = 0 CL = 25 pF CL = 100 pF TA – Free-Air Temperature – °C RL = 2 kΩ Figure 68 PHASE MARGIN vs SUPPLY VOLTAGE 0 4 8 12 16 20 VIC = 0 VO = 0 RL = 2 kΩ TA = 25°C 0° 10° 90° 80° 30° 20° 40° 50° 60° 70° CL = 25 pF CL = 100 pF |VCC±| – Supply Voltage – V xφmm – Phase Margin Figure 69 0° 10° 90° 80° VIC = 0 VO = 0 RL = 2 kΩ TA = 25°C VCC± = ±15 V VCC± = ±5 V PHASE MARGIN vs LOAD CAPACITANCE 30° 20° 40° 50° 60° 70° 0 20 40 60 80 100 CL – Load Capacitance – pF xφmm – Phase Margin † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 63 TYPICAL CHARACTERISTICS† Figure 70 – Output Voltage – V 0 – 5 – 10 – 15 0 1 5 10 NONINVERTING LARGE-SIGNAL PULSE RESPONSE 15 2 4 5 VO VCC± = ±15 V AV = 1 RL = 2 kΩ CL = 100 pF TA = 25°C, 125°C TA = 25°C, 125°C TA = –55°C 3 TA = –55°C t – Time – μs Figure 71 0 – 50 –100 0 0.4 0.8 VO – Output Voltage – mV 50 SMALL-SIGNAL PULSE RESPONSE 100 1.2 1.6 VCC± = ±15 V t – Time – μs AV = –1 RL = 2 kΩ CL = 100 pF TA = 25°C Figure 72 CLOSED-LOOP OUTPUT IMPEDANCE vs FREQUENCY 0.001 10 100 1 k 10 k 100 k 1 M 10 M f – Frequency – Hz 1 0.1 10 100 AV = 100 AV = 10 AV = 1 VCC± = ±15 V 0.01 TA = 25°C zzoo – Closed-Loop Output Impedance – ΩX Figure 73 100 60 40 20 140 80 10 100 1 k 10 k 100 k – Crosstalk Attenuation – dB 120 f – Frequency – Hz ax VCC± = ±15 V VIC = 0 RL = 2 kΩ TA = 25°C TLE2082 AND TLE2084 CROSSTALK ATTENUATION vs FREQUENCY † Data at high and low temperatures are applicable only within the rated operating free-air temperature ranges of the various devices. TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 64 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION input characteristics The TLE208x, TLE208xA, and TLE208xB are specified with a minimum and a maximum input voltage that if exceeded at either input could cause the device to malfunction. Because of the extremely high input impedance and resulting low bias current requirements, the TLE208x, TLE208xA, and TLE208xB are well suited for low-level signal processing; however, leakage currents on printed-circuit boards and sockets can easily exceed bias current requirements and cause degradation in system performance. It is good practice to include guard rings around inputs (see Figure 74). These guards should be driven from a low-impedance source at the same voltage level as the common-mode input. VI R2 R1 VI R4 + – VO R3 VI + – VO VO + – R3 R4 􀀀 R2 R1 Where Figure 74. Use of Guard Rings TLE2081 input offset voltage nulling The TLE2061 series offers external null pins that can be used to further reduce the input offset voltage. The circuit of Figure 75 can be connected as shown if the feature is desired. When external nulling is not needed, the null pins may be left unconnected. + – VCC– N2 N1 100 kΩ 5 kΩ IN– IN+ OUT Figure 75. Input Offset Voltage Nulling TLE208x, TLE208xA, TLE208xY EXCALIBUR HIGH-SPEED JFET-INPUT OPERATIONAL AMPLIFIERS SLOS182B – FEBRUARY 1997 – REVISED JUNE 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 65 APPLICATION INFORMATION macromodel information Macromodel information provided was derived using PSpice Parts model generation software. The Boyle macromodel (see Note 4) and subcircuit in Figure 58 were generated using the TLE208x typical electrical and operating characteristics at TA = 25°C. Using this information, output simulations of the following key parameters can be generated to a tolerance of 20% (in most cases): 􀀀 Unity-gain frequency 􀀀 Common-mode rejection ratio 􀀀 Phase margin 􀀀 DC output resistance 􀀀 AC output resistance 􀀀 Short-circuit output current limit 􀀀 Maximum positive output voltage swing 􀀀 Maximum negative output voltage swing 􀀀 Slew rate 􀀀 Quiescent power dissipation 􀀀 Input bias current 􀀀 Open-loop voltage amplification NOTE 4: G.R. Boyle, B.M. Cohn, D. O. Pederson, and J. E. Solomon, “Macromodeling of Integrated Circuit Operational Amplifiers”, IEEE Journal of Solid-State Circuits, SC-9, 353 (1974). OUT + – + – + – + – + – + – + – – + VCC+ RP IN– 2 IN+ 1 VCC– RD1 11 J1 J2 10 RSS ISS 3 12 RD2 VE 54 DE DP VC DC C1 53 R2 6 9 EGND VB FB C2 GCM GA VLIM 8 5 RO1 RO2 HLIM 90 DLP 91 DLN 92 VLP VLN 99 7 4 .SUBCKT TLE208x 1 2 3 4 5 C1 11 12 2.2E–12 C2 6 7 10.00E–12 DC 5 53 DX DE 54 5 DX DLP 90 91 DX DLN 92 90 DX DP 4 3 DX EGND 99 0 POLY (2) (3,0) (4,0) 0 .5 .5 FB 7 99 POLY (5) VB VC VE VLP VLN 0 + . . . . 5.607E6 –6E6 6E6 6E6 –6E6 GA 6 0 11 12 333.0E–6 GCM 0 6 10 99 7.43E–9 ISS 3 10 DC 400.0E–6 HLIM 90 0 VLIM 1K J1 11 2 10 JX J2 12 1 10 JX RD1 4 11 3.003E3 RD2 4 12 3.003E3 R01 8 5 80 R02 7 99 80 RP 3 4 27.30E3 RSS 10 99 500.0E3 VB 9 0 DC 0 VC 3 53 DC 2.20 VE 54 4 DC 2.20 VLIM 7 8 DC 0 VLP 91 0 DC 45 VLN 0 92 DC 45 .MODEL DX D (IS=800.0E–18) .MODEL JX PJF (IS=15.00E–12 BETA=554.5E–6 + VTO=–.6) .ENDS R2 6 9 100.0E3 Figure 76. Boyle Macromodel and Subcircuit PSpice and Parts are trademarks of MicroSim Corporation. PACKAGE OPTION ADDENDUM www.ti.com 9-May-2014 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples TLE2081ACD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081AC TLE2081ACDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081AC TLE2081ACDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081AC TLE2081ACDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081AC TLE2081ACP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 TLE2081AC TLE2081ACPE4 ACTIVE PDIP P 8 TBD Call TI Call TI -40 to 85 TLE2081AC TLE2081AID ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 2081AI TLE2081AIDG4 ACTIVE SOIC D 8 TBD Call TI Call TI -40 to 85 2081AI TLE2081AIP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 TLE2081AI TLE2081AIPE4 ACTIVE PDIP P 8 TBD Call TI Call TI -40 to 85 TLE2081AI TLE2081CD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081C TLE2081CDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081C TLE2081CDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 0 to 70 2081C TLE2081CDRG4 ACTIVE SOIC D 8 TBD Call TI Call TI 0 to 70 2081C TLE2081CP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 TLE2081CP TLE2081CPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type 0 to 70 TLE2081CP TLE2081ID ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 2081I TLE2081IDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 2081I PACKAGE OPTION ADDENDUM www.ti.com 9-May-2014 Addendum-Page 2 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples TLE2081IDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2081I TLE2081IDRG4 ACTIVE SOIC D 8 TBD Call TI Call TI 2081I TLE2081IP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2081IP TLE2081IPE4 ACTIVE PDIP P 8 TBD Call TI Call TI TLE2081IP TLE2082ACD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AC TLE2082ACDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AC TLE2082ACDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AC TLE2082ACDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AC TLE2082ACP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082AC TLE2082ACPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082AC TLE2082AID ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AI TLE2082AIDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AI TLE2082AIDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AI TLE2082AIDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082AI TLE2082AIP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082AI TLE2082AIPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082AI TLE2082AMFKB NRND LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 TLE2082 AMFKB TLE2082AMJGB ACTIVE CDIP JG 8 1 TBD A42 N / A for Pkg Type -55 to 125 TLE2082 AMJGB TLE2082AMP OBSOLETE PDIP P 8 TBD Call TI Call TI -55 to 125 PACKAGE OPTION ADDENDUM www.ti.com 9-May-2014 Addendum-Page 3 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples TLE2082CD ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082C TLE2082CDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082C TLE2082CDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082C TLE2082CDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082C TLE2082CP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082CP TLE2082CPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082CP TLE2082ID ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082I TLE2082IDG4 ACTIVE SOIC D 8 75 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082I TLE2082IDR ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082I TLE2082IDRG4 ACTIVE SOIC D 8 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 2082I TLE2082IP ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082IP TLE2082IPE4 ACTIVE PDIP P 8 50 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2082IP TLE2082MFKB ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 TLE2082 MFKB TLE2082MJGB OBSOLETE CDIP JG 8 TBD Call TI Call TI -55 to 125 TLE2082MP OBSOLETE PDIP P 8 TBD Call TI Call TI -55 to 125 TLE2084ACDW ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084AC TLE2084ACDWG4 ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084AC TLE2084ACN ACTIVE PDIP N 14 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2084ACN TLE2084ACNE4 ACTIVE PDIP N 14 TBD Call TI Call TI TLE2084ACN PACKAGE OPTION ADDENDUM www.ti.com 9-May-2014 Addendum-Page 4 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples TLE2084CDW ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084C TLE2084CDWG4 ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084C TLE2084CDWR ACTIVE SOIC DW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084C TLE2084CDWRG4 ACTIVE SOIC DW 16 TBD Call TI Call TI TLE2084C TLE2084CN ACTIVE PDIP N 14 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2084CN TLE2084CNE4 ACTIVE PDIP N 14 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type TLE2084CN TLE2084IDW ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084I TLE2084IDWG4 ACTIVE SOIC DW 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TLE2084I TLE2084IDWR OBSOLETE SOIC DW 16 TBD Call TI Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. PACKAGE OPTION ADDENDUM www.ti.com 9-May-2014 Addendum-Page 5 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. 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OTHER QUALIFIED VERSIONS OF TLE2082, TLE2082A, TLE2082AM, TLE2082M : • Catalog: TLE2082A, TLE2082 • Military: TLE2082M, TLE2082AM NOTE: Qualified Version Definitions: • Catalog - TI's standard catalog product • Military - QML certified for Military and Defense Applications TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant TLE2081ACDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2081CDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2081IDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2081IDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2082ACDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2082AIDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2082AIDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2082CDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2082IDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TLE2084CDWR SOIC DW 16 2000 330.0 16.4 10.75 10.7 2.7 12.0 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 Pack Materials-Page 1 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLE2081ACDR SOIC D 8 2500 340.5 338.1 20.6 TLE2081CDR SOIC D 8 2500 340.5 338.1 20.6 TLE2081IDR SOIC D 8 2500 340.5 338.1 20.6 TLE2081IDR SOIC D 8 2500 367.0 367.0 35.0 TLE2082ACDR SOIC D 8 2500 340.5 338.1 20.6 TLE2082AIDR SOIC D 8 2500 367.0 367.0 35.0 TLE2082AIDR SOIC D 8 2500 340.5 338.1 20.6 TLE2082CDR SOIC D 8 2500 340.5 338.1 20.6 TLE2082IDR SOIC D 8 2500 340.5 338.1 20.6 TLE2084CDWR SOIC DW 16 2000 367.0 367.0 38.0 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 Pack Materials-Page 2 MECHANICAL DATA MCER001A – JANUARY 1995 – REVISED JANUARY 1997 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.310 (7,87) 0.290 (7,37) 0.014 (0,36) 0.008 (0,20) Seating Plane 4040107/C 08/96 5 4 0.065 (1,65) 0.045 (1,14) 8 1 0.020 (0,51) MIN 0.400 (10,16) 0.355 (9,00) 0.015 (0,38) 0.023 (0,58) 0.063 (1,60) 0.015 (0,38) 0.200 (5,08) MAX 0.130 (3,30) MIN 0.245 (6,22) 0.280 (7,11) 0.100 (2,54) 0°–15° NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. This package can be hermetically sealed with a ceramic lid using glass frit. D. Index point is provided on cap for terminal identification. E. Falls within MIL STD 1835 GDIP1-T8 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. 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The IL710 is the world's fastest digital isolator with a 110 Mbaud data rate. The symmetric magnetic coupling barrier provides a typical propagation delay of only 10 ns and a pulse width distortion of 2 ns achieving the best specifications of any isolator device. Typical transient immunity of 30 kV/μs is unsurpassed. The IL710 is ideally suited for isolating applications such as PROFIBUS, RS-485, RS422 and others. The IL710 is available in 8-pin PDIP and 8-pin SOIC packages and performance is specified over the temperature range of -40°C to +100°C without any derating. Isoloop® is a registered trademark of NVE Corporation * US Patent number 5,831,426; 6,300,617 and others IL710ISOLOOP® 2 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com Recommended Operating Conditions Parameters Symbol Min. Max. Units Ambient Operating Temperature TA -40 100 oC Supply Voltage (3.3/5.0 V operation) VDD1,VDD2 3.0 5.5 Volts Supply Voltage (5.0 V operation) VDD1,VDD2 4.5 5.5 Volts Logic High Input Voltage VIH 2.4 VDD1 Volts Logic Low Input Voltage VIL 0 0.8 Volts Minimum Signal Rise and Fall Times tIR,tIF 1 μsec Absolute Maximum Ratings Parameters Symbol Min. Max. Units Storage Temperature TS -55 175 oC Ambient Operating Temperature(1) TA -55 125 oC Supply Voltage VDD1,VDD2 -0.5 7 Volts Input Voltage VI -0.5 VDD1+0.5 Volts Input Voltage VOE -0.5 VDD2+0.5 Volts Output Voltage VO -0.5 VDD2+0.5 Volts Output Current Drive IO 10 mA Lead Solder Temperature (10s) 280 oC ESD 2kV Human Body Model Insulation Specifications Parameter Condition Min. Typ. Max. Units Barrier Impedance >1014 ||3 Ω || pF Creepage Distance (External) 7.036 (PDIP) mm 4.026 (SOIC) Leakage Current 240 VRMS 0.2 μA 60Hz Package Characteristics Parameter Symbol Min. Typ. Max. Units Test Conditions Capacitance (Input-Output)(5) CI-O 1.1 pF f= 1MHz Thermal Resistance (PDIP) θJCT 150 oC/W Thermocouple located at (SOIC) θJCT 240 oC/W center underside of package Package Power Dissipation PPD 150 mW Model Pollution Material Max Working Package Type Degree Group Voltage 8–PDIP 8–SOIC IL710-2 II III 300 VRMS 􀀹 IL710-3 II III 150 VRMS 􀀹 IEC61010-1 TUV Certificate Numbers: B 01 07 44230 001 (PDIP) B 01 07 44230 002 (SOIC) Classification as Table 1. UL 1577 Component Recognition program. File # E207481 Rated 2500Vrms for 1min. NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com Electrical Specifications Electrical Specifications are Tmin to Tmax unless otherwise stated. Parameter Symbol 3.3 Volt Specifications 5.0 Volt Specifications Units Test Conditions DC Specifications Min. Typ. Max. Min. Typ. Max. Input Quiescent Supply Current IDD1 8 10 10 15 μA Output Quiescent Supply Current IDD2 1.7 2 2.5 3 mA Logic Input Current II -10 10 -10 10 μA Logic High Output Voltage VOH VDD2-0.1 VDD2 VDD2-0.1 VDD2 V IO =-20 μA, VI =VIH 0.8*VDD2 VDD2-0.5 0.8*VDD2 VDD2-0.5 IO = -4 mA, VI =VIH Logic Low Output Voltage VOL 0 0.1 0 0.1 V IO = 20 μA, VI =VIL 0.5 0.8 0.5 0.8 IO = 4 mA, VI =VIL Switching Specifications Maximum Data Rate 100 110 100 110 MBd CL = 15 pF Pulse Width PW 10 10 ns Propagation Delay Input to Output (High to Low) tPHL 12 18 10 15 ns CL = 15 pF Propagation Delay Input to Output (Low to High) tPLH 12 18 10 15 ns CL = 15 pF Propagation Delay Enable to Output (High to High Impedance) tPHZ 3 5 3 5 ns CL = 15 pF Propagation Delay Enable to Output (Low to High Impedance) tPLZ 3 5 3 5 ns CL = 15 pF Propagation Delay Enable to Output (High Impedance to High) tPZH 3 5 3 5 ns CL = 15 pF Propagation Delay Enable to Output (High Impedance to Low) tPZL 3 5 3 5 ns CL = 15 pF Pulse Width Distortion(2) 2 3 2 3 Propagation Delay Skew(3) tPSK 4 6 4 6 ns CL = 15 pF Output Rise Time (10-90%) tR 2 4 1 3 ns CL = 15 pF Output Fall Time (10-90%) tF 2 4 1 3 ns CL = 15 pF Common Mode Transient |CMH| Immunity (Output Logic High or 20 30 20 30 kV/μs Vcm = 300V Logic Low) (4) |CML| IL710ISOLOOP® 3 Notes: 1. Absolute Maximum ambient operating temperature means the device will not be damaged if operated under these conditions. It does not guarantee performance. 2. PWD is defined as | tPHL - tPLH |. %PWD is equal to the PWD divided by the pulse width. 3. tPSK is equal to the magnitude of the worst case difference in tPHL and/or tPLH that will be seen between units at 25OC. 4. CMH is the maximum common mode voltage slew rate that can be sustained while maintaining VO > 0.8 VDD2. CML is the maximum common mode input voltage that can be sustained while maintaining VO < 0.8 V. The common mode voltage slew rates apply to both rising and falling common mode voltage edges. 5. Device is considered a two terminal device: pins 1-4 shorted and pins 5-8 shorted. IL710ISOLOOP® 4 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com Application Notes: Dynamic Power Consumption Isoloop devices achieve their low power consumption from the manner by which they transmit data across the isolation barrier. By detecting the edge transitions of the input logic signal and converting these to narrow current pulses, a magnetic field is created around the GMR Wheatstone bridge. Depending on the direction of the magnetic field, the bridge causes the output comparator to switch following the input logic signal. Since the current pulses are narrow, about 2.5ns wide, the power consumption is independent of mark-to-space ratio and solely dependent on frequency. This has obvious advantages over optocouplers whose power consumption is heavily dependent on its on-state and frequency. The approximate power supply current per channel for IsoLoop® is: Power Supply Decoupling Both power supplies to these devices should be decoupled with low ESR 47 nF ceramic capacitors. For data rates in excess of 10MBd, use of ground planes for both GND1 and GND2 is highly recommended. Capacitors must be located as close as possible to the VDD Pins. Signal Status on Start-up and Shut Down To minimize power dissipation, the input signals are differentiated and then latched on the output side of the isolation barrier to reconstruct the signal. This could result in an ambiguous output state depending on power up, shutdown and power loss sequencing. Therefore, the designer should consider the inclusion of an initialization signal in his start-up circuit. Initialization consists of toggling the input either high then low or low then high, depending on the desired state. Electrostatic Discharge Sensitivity This product has been tested for electrostatic sensitivity to the limits stated in the specifications. However, NVE recommends that all integrated circuits be handled with appropriate care to avoid damage. Damage caused by inappropriate handling or storage could range from performance degradation to complete failure. Data Transmission Rates The reliability of a transmission system is directly related to the accuracy and quality of the transmitted digital information. For a digital system, those parameters which determine the limits of the data transmission are pulse width distortion and propagation delay skew. Propagation delay is the time taken for the signal to travel through the device. This is usually different when sending a low-to-high than when sending a high-to-low signal. This difference, or error, is called pulse width distortion (PWD) and is usually in ns. It may also be expressed as a percentage: This figure is almost three times better than for any available optocoupler with the same temperature range, and two times better than any optocoupler regardless of published temperature range. The IsoLoop® range of isolators surpasses the 10% maximum PWD recommended by PROFIBUS, and will run at almost 35 Mb before reaching the 10% limit. Propagation delay skew is the difference in time taken for two or more channels to propagate their signals. This becomes significant when clocking is involved since it is undesirable for the clock pulse to arrive before the data has settled. A short propagation delay skew is therefore critical, especially in high data rate parallel systems, to establish and maintain accuracy and repeatability. The IsoLoop® range of isolators all have a maximum propagation delay skew of 6 ns, which is five times better than any optocoupler. PWD% = Maximum Pulse Width Distortion (ns) x 100% Signal Pulse Width (ns) For example: For data rates of 12.5 Mb PWD% = 3 ns 80 ns x 100% = 3.75% IL710ISOLOOP® 5 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com RS-485 Truth Table TXD RTS A B RXD 1 0 Z Z X 0 0 Z Z X 1 1 1 0 1 0 1 0 1 0 Isolated PROFIBUS / RS-485 Applications Reference 485 Drivers (Texas Instruments) 65ALS176 (-40°C to +85°C) 75ALS176 (0°C to +70°) VDD1 and VISO should be decoupled with 10 nF capacitors at IL710 supply pins IL710ISOLOOP® NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com 6 Truth Table VI VOE VO L L L H L H L H Z H H Z Legend tPLH Propagation Delay, Low to High tPHL Propagation Delay, High to Low tPW Minimum Pulse Width tPLZ Propagation Delay, Low to High Impedance tPZH Propagation Delay, High Impedance to High tPHZ Propagation Delay, High to High Impedance tPZL Propagation Delay, High Impedance to Low tR Rise Time tF Fall Time Timing Diagram IR Soldering Profile Pin Configuration Recommended profile shown. Maximum temperature allowed on any profile is 260° C. 7 NVE Corporation 11409 Valley View Road Eden Prairie, MN 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.isoloop.com IL710-2 (8-Pin PDIP Package) IL710-3 (Small Outline SOIC-8 package) IL710ISOLOOP® Ordering Information: use the following format to order these devices IL 710 -2 B E TR7 Bulk Package Blank = Tube TR7 = 7’’ Tape and Reel TR13 = 13’’ Tape and Reel Lead Frame Material Blank = Tin-Lead Plating E = 100% Tin (Pb Free) Supply Voltage Blank = 3.3/5.0 VDC B = 5.0 VDC Package -2 = PDIP -3 = SOIC (0.15’’) Base Part Number 710 = 1 drive channel Product Family IL = Isolators Valid Part Numbers IL 710-2 IL 710-2E IL 710-2B IL 710-2BE IL 710-3 IL 710-3E IL 710-3B IL 710-3BE All IL710-3 products are available in TR7 or TR13 bulk package options. NVE Corporation 11409 Valley View Road Eden Prairie, Mn 55344-3617 USA Telephone: (952) 829-9217 Fax: (952) 829-9189 Internet: www.nve.com e-mail: isoinfo@nve.com About NVE NVE Corporation is a world leader in the practical commercialization of "spintronics," which many experts believe represents the next generation of microelectronics — the successor to the transistor. Unlike conventional electronics, which rely on electron charge, spintronics uses electron spin to store and transmit information. Spintronics devices are smaller, faster, and more accurate, compared to charge-based microelectronics. It is the spin of electrons that causes magnetism. NVE's products use proprietary spintronic materials called Giant Magnetoresistors (GMR). These materials are made of exotic alloys a few atoms thick, and provide very large signals (the "Giant" in "Giant Magnetoresistor"). NVE has the unique capability to combine leading edge GMR materials with integrated circuits to make high performance electronic components. We are pioneers in creating practical products using this revolutionary technology and introduced the world's first GMR products in 1994. We also license spintronics/Magnetic Random Access Memory (MRAM) designs to world-class memory manufacturers. Our products include: · Digital Signal Isolators · Isolated Bus Transceivers · Magnetic Field Sensors · Magnetic Field Gradient Sensors (Gradiometer) · Digital Magnetic Field Sensors. The information provided by NVE Corporation is believed to be accurate. However, no responsibility is assumed by NVE Corporation for its use, nor for any infringement of patents, nor rights or licenses granted to third parties, which may result from its use. No license is granted by implication, or otherwise, under any patent or patent rights of NVE Corporation. NVE Corporation does not authorize, nor warrant, any NVE Corporation product for use in life support devices or systems or other critical applications. The use of NVE Corporation’s products in such applications is understood to be entirely at the customer's own risk. Specifications shown are subject to change without notice. ISB-DS-001-IL710-G May 31, 2005 Features ➤ Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries ➤ Hysteretic PWM switch-mode current regulation or gated control of an external regulator ➤ Easily integrated into systems or used as a stand-alone charger ➤ Pre-charge qualification of temperature and voltage ➤ Configurable, direct LED outputs display battery and charge status ➤ Fast-charge termination by Δ temperature/ Δ time, peak volume detection, -ΔV, maximum voltage, maximum temperature, and maximum time ➤ Optional top-off charge and pulsed current maintenance charging ➤ Logic-level controlled low-power mode (< 5μA standby current) General Description The bq2004E and bq2004H Fast Charge ICs provide comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device. Integration of closed-loop current control circuitry allows the bq2004 to be the basis of a cost-effective solution for stand-alone and systemintegrated chargers for batteries of one or more cells. Switch-activated discharge-beforecharge allows bq2004E/H-based chargers to support battery conditioning and capacity determination. High-efficiency power conversion is accomplished using the bq2004E/H as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2004E/H may alternatively be used to gate an externally regulated charging current. Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits. Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:  Rate of temperature rise (ΔT/Δt)  Peak voltage detection (PVD)  Negative delta voltage (-ΔV)  Maximum voltage  Maximum temperature  Maximum time After fast charge, optional top-off and pulsed current maintenance phases with appropriate display mode selections are available. The bq2004H differs from the bq2004E only in that fast charge, hold-off, and top-off time units have been scaled up by a factor of two, and the bq2004H provides different display selections. Timing differences between the two ICs are illustrated in Table 1. Display differences are shown in Table 2. 1 Fast-Charge ICs bq2004E/H DCMD Discharge command DSEL Display select VSEL Voltage termination select TM1 Timer mode select 1 TM2 Timer mode select 2 TCO Temperature cutoff TS Temperature sense BAT Battery voltage 1 PN2004E01.eps 16-Pin Narrow DIP or Narrow SOIC 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 INH DIS MOD VCC VSS LED2 LED1 SNS DCMD DSEL VSEL TM1 TM2 TCO TS BAT SNS Sense resistor input LED1 Charge status output 1 LED2 Charge status output 2 VSS System ground VCC 5.0V ±10% power MOD Charge current control DIS Discharge control output INH Charge inhibit input Pin Connections SLUS081A - APRIL 2005 Pin Names Pin Descriptions DCMD Discharge-before-charge control input The DCMD input controls the conditions that enable discharge-before-charge. DCMD is pulled up internally. A negative-going pulse on DCMD initiates a discharge to endof- discharge voltage (EDV) on the BAT pin, followed by a new charge cycle start. Tying DCMD to ground enables automatic discharge-before-charge on every new charge cycle start. DSEL Display select input This three-state input configures the charge status display mode of the LED1 and LED2 outputs and can be used to disable top-off and pulsed-trickle. See Table 2. VSEL Voltage termination select input This three-state input controls the voltagetermination technique used by the bq2004E/H. When high, PVD is active. When floating, -ΔV is used. When pulled low, both PVD and -ΔV are disabled. TM1– TM2 Timer mode inputs TM1 and TM2 are three-state inputs that configure the fast charge safety timer, voltage termination hold-off time, “top-off ”, and trickle charge control. See Table 1. TCO Temperature cut-off threshold input Input to set maximum allowable battery temperature. If the potential between TS and SNS is less than the voltage at the TCO input, then fast charge or top-off charge is terminated. TS Temperature sense input Input, referenced to SNS, for an external thermister monitoring battery temperature. BAT Battery voltage input BAT is the battery voltage sense input, referenced to SNS. This is created by a highimpedance resistor-divider network connected between the positive and the negative terminals of the battery. SNS Charging current sense input SNS controls the switching of MOD based on an external sense resistor in the current path of the battery. SNS is the reference potential for both the TS and BAT pins. If SNS is connected to VSS, then MOD switches high at the beginning of charge and low at the end of charge. LED1– LED2 Charge status outputs Push-pull outputs indicating charging status. See Table 2. Vss Ground VCC VCC supply input 5.0V, ±10% power input. MOD Charge current control output MOD is a push-pull output that is used to control the charging current to the battery. MOD switches high to enable charging current to flow and low to inhibit charging current flow. DIS Discharge control output Push-pull output used to control an external transistor to discharge the battery before charging. INH Charge inhibit input When low, the bq2004E/H suspends all charge actions, drives all outputs to high impedance, and assumes a low-power operational state. When transitioning from low to high, a new charge cycle is started. 2 bq2004E/H Functional Description Figure 2 shows a block diagram and Figure 3 shows a state diagram of the bq2004E/H. Battery Voltage and Temperature Measurements Battery voltage and temperature are monitored for maximum allowable values. The voltage presented on the battery sense input, BAT, should represent a two-cell potential for the battery under charge. A resistor-divider ratio of: RB1 RB2 = N 2 - 1 is recommended to maintain the battery voltage within the valid range, where N is the number of cells, RB1 is the resistor connected to the positive battery terminal, and RB2 is the resistor connected to the negative battery terminal. See Figure 1. Note: This resistor-divider network input impedance to end-to-end should be at least 200kΩ and less than 1MΩ. A ground-referenced negative temperature coefficient thermistor placed in proximity to the battery may be used as a low-cost temperature-to-voltage transducer. The temperature sense voltage input at TS is developed using a resistor-thermistor network between VCC and VSS. See Figure 1. Both the BAT and TS inputs are referenced to SNS, so the signals used inside the IC are: VBAT - VSNS = VCELL and VTS - VSNS = VTEMP Discharge-Before-Charge The DCMD input is used to command discharge-beforecharge via the DIS output. Once activated, DIS becomes active (high) until VCELL falls below VEDV, at which time DIS goes low and a new fast charge cycle begins. The DCMD input is internally pulled up to VCC (its inactive state). Leaving the input unconnected, therefore, results in disabling discharge-before-charge. A negative going pulse on DCMD initiates discharge-before-charge at any time regardless of the current state of the bq2004. If DCMD is tied to VSS, discharge-before-charge will be the first step in all newly started charge cycles. Starting A Charge Cycle A new charge cycle is started by: 1. Application of VCC power. 2. VCELL falling through the maximum cell voltage, VMCV where: VMCV = 0.8 ∗ VCC ± 30mV 3. A transition on the INH input from low to high. If DCMD is tied low, a discharge-before-charge will be executed as the first step of the new charge cycle. Otherwise, pre-charge qualification testing will be the first step. The battery must be within the configured temperature and voltage limits before fast charging begins. The valid battery voltage range is VEDV < VBAT < VMCV where: VEDV = 0.4 ∗ VCC ± 30mV 3 bq2004E/H Fg2004a.eps NT C bq2004E/H VCC PACK + PACK - TS SNS RT1 RT2 RB2 bq2004E/H RB1 Negative Temperature Coefficient Thermister PACK+ PACKBAT SNS Figure 1. Voltage and Temperature Monitoring The valid temperature range is VHTF < VTEMP < VLTF, where: VLTF = 0.4 ∗ VCC ± 30mV VHTF = [(1/3 ∗ VLTF) + (2/3 ∗ VTCO)] ± 30mV VTCO is the voltage presented at the TCO input pin, and is configured by the user with a resistor divider between VCC and ground. The allowed range is 0.2 to 0.4 ∗ VCC. If the temperature of the battery is out of range, or the voltage is too low, the chip enters the charge pending state and waits for both conditions to fall within their allowed limits. During the charge-pending mode, the IC first applies a top-off charge to the battery. The top-off charge, at the rate of 1 8 of the fast charge, continues until the fast-charge conditions are met or the top-off time-out period is exceeded. The IC then trickle charges until the fast-charge conditions are met. There is no time limit on the charge pending state; the charger remains in this state as long as the voltage or temperature conditons are outside of the allowed limits. If the voltage is too high, the chip goes to the battery absent state and waits until a new charge cycle is started. Fast charge continues until termination by one or more of the six possible termination conditions:  Delta temperature/delta time (ΔT/Δt)  Peak voltage detection (PVD)  Negative delta voltage (-ΔV)  Maximum voltage  Maximum temperature  Maximum time PVD and -ΔV Termination The bq2004E/H samples the voltage at the BAT pin once every 34s. When -ΔV termination is selected, if VCELL is lower than any previously measured value by 12mV ±4mV (6mV/cell), fast charge is terminated. When PVD termination is selected, if VCELL is lower than any previously measured value by 6mV ±2mV (3mV/cell), fast charge is terminated. The PVD and -ΔV tests are valid in the range 0.4 ∗ VCC < VCELL < 0.8 ∗ VCC. 4 bq2004E/H BD200401.eps Timing Control OSC Display Control Charge Control State Machine Discharge Control MOD Control TCO Check LTF Check A/D EDV Check MCV Check DIS MOD INH VCC VSS BAT SNS TS TM1 TM2 TCO LED1 DCMD DVEN VTS - VSNS VBAT - VSNS LED2 DSEL PWR Control Figure 2. Block Diagram 5 VSEL Input Voltage Termination Low Disabled Float -ΔV High PVD Voltage Sampling Each sample is an average of voltage measurements. The IC takes 32 measurements in PVD mode and 16 measurements in -ΔV mode. The resulting sample periods (9.17ms and 18.18ms, respectively) filter out harmonics centered around 55Hz and 109Hz. This technique minimizes the effect of any AC line ripple that may feed through the power supply from either 50Hz or 60Hz AC sources. Tolerance on all timing is ±16%. Temperature and Voltage Termination Hold-off A hold-off period occurs at the start of fast charging. During the hold-off period, -ΔV and ΔT/Δt termination are disabled. The MOD pin is enabled at a duty cycle of 260μs active for every 1820μs inactive. This modulation results in an average rate 1/8th that of the fast charge rate. This avoids premature termination on the voltage spikes sometimes produced by older batteries when fast-charge current is first applied. Maximum voltage and maximum temperature terminations are not affected by the hold-off period. ΔT/Δt Termination The bq2004E/H samples at the voltage at the TS pin every 34s, and compares it to the value measured two samples earlier. If VTEMP has fallen 16mV ±4mV or more, fast charge is terminated. The ΔT/Δt termination test is valid only when VTCO < VTEMP < VLTF. Temperature Sampling Each sample is an average of 16 voltage measurements. The resulting sample period (18.18ms) filters out harmonics around 55Hz. This technique minimizes the effect of any AC line ripple that may feed through the power supply from either 50Hz or 60Hz AC sources. Tolerance on all timing is ±16%. Maximum Voltage, Temperature, and Time Anytime VCELL rises above VMCV, the LEDs go off and current flow into the battery ceases immediately. If VCELL then falls back below VMCV before tMCV = 1.5s ±0.5s, the chip transitions to the Charge Complete state (maximum voltage termination). If VCELL remains above VMCV at the expiration of tMCV, the bq2004E/H transitions to the Battery Absent state (battery removal). See Figure 3. Maximum temperature termination occurs anytime VTEMP falls below the temperature cutoff threshold VTCO. Charge will also be terminated if VTEMP rises above the low temperature fault threshold, VLTF, after fast charge begins. Corresponding Fast-Charge Rate TM1 TM2 Typical Fast-Charge Safety Time (min) Typical PVD, -ΔV Hold-Off Time (s) Top-Off Rate Pulse- Trickle Rate Pulse- Trickle Period (Hz) 2004E 2004H 2004E 2004H 2004E 2004H 2004E 2004H 2004E 2004H C/4 C/8 Low Low 325 650 137 273 Disabled Disabled Disabled C/2 C/4 Float Low 154 325 546 546 Disabled C/512 15 30 1C C/2 High Low 77 154 273 546 Disabled C/512 7.5 15 2C 1C Low Float 39 77 137 273 Disabled C/512 3.75 7.5 4C 2C Float Float 19 39 68 137 Disabled C/512 1.88 3.75 C/2 C/4 High Float 154 325 546 546 C/16 C/32 C/512 15 30 1C C/2 Low High 77 154 273 546 C/8 C/16 C/512 7.5 15 2C 1C Float High 39 77 137 273 C/4 C/18 C/512 3.75 7.5 4C 2C High High 19 39 68 137 C/2 C/4 C/512 1.88 3.75 Note: Typical conditions = 25°C, VCC = 5.0V. Table 1. Fast Charge Safety Time/Hold-Off/Top-Off Table bq2004E/H 6 bq2004E/H Mode 1 bq2004E Charge Action State LED1 LED2 DSEL = VSS Battery absent Low Low Fast charge pending or a discharge-before-charge in progress High High Fast charging Low High Fast charge complete, top-off, and/or trickle High Low Mode 1 bq2004H Charge Action State LED1 LED2 DSEL = VSS Battery absent Low Low Discharge-before-charge in progress High High Fast charge pending Low 1 8 second high 1 8 second low Fast charging Low High Fast charge complete, top-off, and/or trickle High Low Mode 2 bq2004E Charge Action State (See note) LED1 LED2 DSEL = Floating Battery absent Low Low Fast charge pending or discharge-before-charge in progress High High Fast charging Low High Fast charge complete, top-off, and/or trickle High Low Mode 2 bq2004H Charge Action State (See note) LED1 LED2 DSEL = Floating Battery absent Low Low Discharge-before-charge in progress High High Fast charge pending Low 1 8 second high 1 8 second low Fast charging Low High Fast charge complete, top-off, and/or trickle High Low Mode 3 bq2004E/H Charge Action State LED1 LED2 DSEL = VCC Battery absent Low Low Fast charge pending or discharge-before-charge in progress Low 1 8 second high 1 8 second low Fast charging Low High Fast charge complete, top-off, and/or trickle High Low Note: Pulse trickle is inhibited in Mode 2. Table 2. bq2004E/H LED Output Summary Maximum charge time is configured using the TM pin. Time settings are available for corresponding charge rates of C/4, C/2, 1C, and 2C. Maximum time-out termination is enforced on the fast-charge phase, then reset, and enforced again on the top-off phase, if selected. There is no time limit on the trickle-charge phase. Top-off Charge An optional top-off charge phase may be selected to follow fast charge termination for the C/2 through 4C rates. This phase may be necessary on NiMH or other battery chemistries that have a tendency to terminate charge prior to reaching full capacity. With top-off enabled, charging continues at a reduced rate after fast-charge termination for a period of time equal to 0.235∗ the fast-charge safety time (See Table 1.) During top-off, the MOD pin is enabled at a duty cycle of 260μs active for every 1820μs inactive. This modulation results in an average rate 1/8th that of the fast charge rate. Maximum voltage, time, and temperature are the only termination methods enabled during topoff. Pulse-Trickle Charge Pulse-trickle charging may be configured to follow the fast charge and optional top-off charge phases to compensate for self-discharge of the battery while it is idle in the charger. In the pulse-trickle mode, MOD is active for 260μs of a period specified by the settings of TM1 and TM2. See Table 1. The resulting trickle-charge rate is C/512. Both pulse trickle and top-off may be disabled by tying TM1 and TM2 to VSS or by selecting Mode 2 in the display. Charge Status Indication Charge status is indicated by the LED1 and LED2 outputs. The state of these outputs in the various charge cycle phases is given in Table 2 and illustrated in Figure 3. In all cases, if VCELL exceeds the voltage at the MCV pin, both LED1 and LED2 outputs are held low regardless of other conditions. Both can be used to directly drive an LED. Charge Current Control The bq2004E/H controls charge current through the MOD output pin. The current control circuitry is designed to support implementation of a constant-current switching regulator or to gate an externally regulated current source. When used in switch mode configuration, the nominal regulated current is: IREG = 0.225V/RSNS Charge current is monitored at the SNS input by the voltage drop across a sense resistor, RSNS, between the low side of the battery pack and ground. RSNS is sized to provide the desired fast charge current. If the voltage at the SNS pin is less than VSNSLO, the MOD output is switched high to pass charge current to the battery. When the SNS voltage is greater than VSNSHI, the MOD output is switched low—shutting off charging current to the battery. VSNSLO = 0.04 ∗ VCC ± 25mV VSNSHI = 0.05 ∗ VCC ± 25mV When used to gate an externally regulated current source, the SNS pin is connected to VSS, and no sense resisitor is required. 7 bq2004E/H 8 Charge Pending DCMD Tied to Ground? Falling Edge on DCMD Discharge- Before-Charge Top-Off and Pulse-Trickle Charge Pulse Trickle Charge Pulse Trickle Charge Pulse Trickle Charge Top-Off Charge Fast Charge Battery Voltage? Battery Temperature? Top-Off Selected? New Charge Cycle Started by Any One of: VCC Rising to Valid Level Battery Replacement (VCELL Falling through VMCV) Inhibit (INH) Released VEDV < VCELL < VMCV and VHTF < VTEMP < VLTF VHTF < VTEMP < VLTF VEDV < VCELL < VMCV VTEMP > VLTF or VTEMP < VHTF VCELL < VEDV VCELL < VEDV Yes Yes No No t > tMCV > VMCV VCELL > VMCV VCELL > VCELL VMCV > VCELL VMCV > VCELL VMCV VCELL < VMCV Charge Complete Battery Absent or 0.235 Maximum Time Out VTEMP < VTCO SD2004EH.eps > VCELL VMCV - V or T/ t or VTEMP < VTCO or Maximum Time Out Figure 3. Charge Algorithm State Diagram bq2004E/H 9 Absolute Maximum Ratings Symbol Parameter Minimum Maximum Unit Notes VCC VCC relative to VSS -0.3 +7.0 V VT DC voltage applied on any pin excluding VCC relative to VSS -0.3 +7.0 V TOPR Operating ambient temperature -20 +70 °C Commercial TSTG Storage temperature -55 +125 °C TSOLDER Soldering temperature - +260 °C 10 sec max. TBIAS Temperature under bias -40 +85 °C Note: Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to conditions beyond the operational limits for extended periods of time may affect device reliability. DC Thresholds (TA = TOPR; VCC ±10%) Symbol Parameter Rating Tolerance Unit Notes VSNSHI High threshold at SNS resulting in MOD = Low 0.05 * VCC ±0.025 V VSNSLO Low threshold at SNS resulting in MOD = High 0.04 * VCC ±0.025 V VLTF Low-temperature fault 0.4 * VCC ±0.030 V VTEMP ≥ VLTF inhibits/ terminates charge VHTF High-temperature fault (1/3 * VLTF) + (2/3 * VTCO) ±0.030 V VTEMP ≤ VHTF inhibits charge VEDV End-of-discharge voltage 0.4 * VCC ±0.030 V VCELL < VEDV inhibits fast charge VMCV Maximum cell voltage 0.8 * VCC ±0.030 V VCELL > VMCV inhibits/ terminates charge VTHERM TS input change forΔT/Δt detection -16 ±4 mV VCC = 5V, TA = 25°C -ΔV BAT input change for -ΔV detection -12 ±4 mV VCC = 5V, TA = 25°C PVD BAT input change for PVD detection -6 ±2 mV VCC = 5V, TA = 25°C bq2004E/H 10 Recommended DC Operating Conditions (TA = TOPR) Symbol Condition Minimum Typical Maximum Unit Notes VCC Supply voltage 4.5 5.0 5.5 V VBAT Battery input 0 - VCC V VCELL BAT voltage potential 0 - VCC V VBAT - VSNS VTS Thermistor input 0 - VCC V VTEMP TS voltage potential 0 - VCC V VTS - VSNS VTCO Temperature cutoff 0.2 * VCC - 0.4 * VCC V Valid ΔT/Δt range VIH Logic input high 2.0 - - V DCMD, INH Logic input high VCC - 0.3 - - V TM1, TM2, DSEL, VSEL VIL Logic input low - - 0.8 V DCMD, INH Logic input low - - 0.3 V TM1, TM2, DSEL, VSEL VOH Logic output high VCC - 0.8 - - V DIS, MOD, LED1, LED2, IOH ≤ -10mA VOL Logic output low - - 0.8 V DIS, MOD, LED1, LED2, IOL ≤ 10mA ICC Supply current - 1 3 mA Outputs unloaded ISB Standby current - - 1 μA INH = VIL IOH DIS, LED1, LED2,MODsource -10 - - mA @VOH = VCC - 0.8V IOL DIS, LED1, LED2, MOD sink 10 - - mA @VOL = VSS + 0.8V IL Input leakage - - ±1 μA INH, BAT, V = VSS to VCC Input leakage 50 - 400 μA DCMD, V = VSS to VCC IIL Logic input low source - - 70 μA TM1, TM2, DSEL, VSEL, V = VSS to VSS + 0.3V IIH Logic input high source -70 - - μA TM1, TM2, DSEL, VSEL, V = VCC - 0.3V to VCC IIZ Tri-state -2 - 2 μA TM1, TM2, DSEL, and VSEL should be left disconnected (floating) for Z logic input state Note: All voltages relative to VSS except as noted. bq2004E/H 11 Impedance Symbol Parameter Minimum Typical Maximum Unit RBAT Battery input impedance 50 - - MΩ RTS TS input impedance 50 - - MΩ RTCO TCO input impedance 50 - - MΩ RSNS SNS input impedance 50 - - MΩ Timing (TA = 0 to +70°C; VCC ±10%) Symbol Parameter Minimum Typical Maximum Unit Notes tPW Pulse width for DCMD and INH pulse command 1 - - μs Pulse start for charge or discharge before charge dFCV Time base variation -16 - 16 % VCC = 4.75V to 5.25V fREG MOD output regulation frequency - - 300 kHz tMCV Maximum voltage termination time limit 1 - 2 s Time limit to distinguish battery removed from charge complete. Note: Typical is at TA = 25°C, VCC = 5.0V. bq2004E/H 12 bq2004E/H 16-Pin DIP Narrow (PN) 16-Pin PN (0.300" DIP) Dimension Inches Millimeters Min. Max. Min. Max. A 0.160 0.180 4.06 4.57 A1 0.015 0.040 0.38 1.02 B 0.015 0.022 0.38 0.56 B1 0.055 0.065 1.40 1.65 C 0.008 0.013 0.20 0.33 D 0.740 0.770 18.80 19.56 E 0.300 0.325 7.62 8.26 E1 0.230 0.280 5.84 7.11 e 0.300 0.370 7.62 9.40 G 0.090 0.110 2.29 2.79 L 0.115 0.150 2.92 3.81 S 0.020 0.040 0.51 1.02 13 bq2004E/H 16-Pin SOIC Narrow (SN) A A1 .004 C B e D E H L 16-Pin SN (0.150" SOIC) Dimension Inches Millimeters Min. Max. Min. Max. A 0.060 0.070 1.52 1.78 A1 0.004 0.010 0.10 0.25 B 0.013 0.020 0.33 0.51 C 0.007 0.010 0.18 0.25 D 0.385 0.400 9.78 10.16 E 0.150 0.160 3.81 4.06 e 0.045 0.055 1.14 1.40 H 0.225 0.245 5.72 6.22 L 0.015 0.035 0.38 0.89 14 bq2004E/H Data Sheet Revision History Change No. Page No. Description Nature of Change 1 All Combined bq2004E and bq2004H, revised and expanded format of this data sheet Clarification 2 7 Separated bq2004E and bq2004H in Table 2, LED Output Summary Clarification 3 5 Description of charge-pending state Clarification 4 Note: Change 1 = Oct. 1997 B changes from Sept. 1996 (bq2004E), Feb. 1997 (bq2004H). Change 2 = Feb. 1998 C changes from Oct. 1997 B. Change 3 = Dec. 1998 D changes from Feb. 1998 C. Change 4 = June 1999 E changes from Dec. 1998 D. 5 9 Corrected VSNSLO tolerance Was: ±0.010 Is: ±0.025 Change 5 = Apr. 2005 F changes from June 1999 E. 15 bq2004E/H Ordering Information bq2004 Package Option: PN = 16-pin narrow plastic DIP SN = 16-pin narrow SOIC Device: E = bq2004E Fast-Charge IC H= bq2004H Fast-Charge IC TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant BQ2004ESNTR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 BQ2004HSNTR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 Pack Materials-Page 1 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) BQ2004ESNTR SOIC D 16 2500 367.0 367.0 38.0 BQ2004HSNTR SOIC D 16 2500 367.0 367.0 38.0 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. 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Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap TI E2E Community e2e.ti.com Wireless Connectivity www.ti.com/wirelessconnectivity Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated TSV6390, TSV6390A, TSV6391, TSV6391A Micropower (60 μA), wide bandwidth (2.4 MHz) CMOS op-amps Features ■ Low offset voltage: 500 μV max (A version) ■ Low power consumption: 60 μA typ at 5 V ■ Low supply voltage: 1.5 V – 5.5 V ■ Gain bandwidth product: 2.4 MHz typical ■ Stable in gain configuration (-3 or +4) ■ Low power shutdown mode: 5 nA typical ■ High output current: 63 mA at VCC= 5 V ■ Low input bias current: 1 pA typical ■ Rail-to-rail input and output ■ Extended temperature range: -40°C to +125°C ■ 4 kV human body model Applications ■ Battery-powered applications ■ Portable devices ■ Signal conditioning ■ Active filtering ■ Medical instrumentation Description The TSV6390 and TSV6391 devices are single operational amplifiers offering low voltage, low power operation and rail-to-rail input and output. With a very low input bias current and low offset voltage (500 μV maximum for the A version), the TSV6390 and TSV6391 are ideal for applications requiring precision. The devices can operate at power supplies ranging from 1.5 to 5.5 V, and are therefore ideal for battery-powered devices, extending battery life. When used with a gain (above -3 or +4), these products feature an excellent speed/power consumption ratio, offering a 2.4 MHz gain bandwidth product while consuming only 60 μA at a 5 V supply voltage. The TSV6390 comes with a shutdown function. Both the TSV6390 and TSV6391 have a high tolerance to ESD, sustaining 4 kV for the human body model. Additionally, they are offered in micropackages, SC70-6 and SOT23-6 for the TSV6390 and SC70-5 and SOT23-5 for the TSV6391. They are guaranteed for industrial temperature ranges from -40° C to +125° C. All these features combined make the TSV6390 and TSV6391 ideal for sensor interfaces, battery-supplied and portable applications, as well as active filtering. TSV6390ICT/ILT TSV6391ICT/ILT SC70-6/SOT23-6 SC70-5/SOT23-5 VCCIn+ In- Out 1 2 3 6 4 +_ 5 SHDN VCC+ VCCIn+ In- Out 1 2 3 5 4 +_ VCC+ www.st.com Contents TSV6390, TSV6390A, TSV6391, TSV6391A 2/22 Doc ID 17118 Rev 1 Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 Operating voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Rail-to-rail input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Rail-to-rail output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.4 Shutdown function (TSV6390) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.5 Optimization of DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.6 Driving resistive and capacitive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.7 PCB layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.8 Macromodel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1 SOT23-5 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2 SOT23-6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.3 SC70-5 (or SOT323-5) package mechanical data . . . . . . . . . . . . . . . . . . 17 4.4 SC70-6 (or SOT323-6) package mechanical data . . . . . . . . . . . . . . . . . . 18 5 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 TSV6390, TSV6390A, TSV6391, TSV6391A Absolute maximum ratings and operating conditions Doc ID 17118 Rev 1 3/22 1 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol Parameter Value Unit VCC Supply voltage(1) 1. All voltage values, except differential voltages, are with respect to network ground terminal. 6 V Vid Differential input voltage (2) 2. Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. ±VCC V Vin Input voltage (3) 3. VCC-Vin must not exceed 6 V, Vin must not exceed 6 V. VCC- -0.2 to VCC+ +0.2 V Iin Input current (4) 4. Input current must be limited by a resistor in series with the inputs. 10 mA SHDN Shutdown voltage(3) VCC- -0.2 to VCC+ +0.2 V Tstg Storage temperature -65 to +150 °C Rthja Thermal resistance junction to ambient(5)(6) SC70-5 SOT23-5 SOT23-6 SC70-6 5. Short-circuits can cause excessive heating and destructive dissipation. 6. Rth are typical values. 205 250 240 232 °C/W Tj Maximum junction temperature 150 °C ESD HBM: human body model(7) 7. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for all couples of pin combinations with other pins floating. 4 kV MM: machine model(8) 8. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 Ω), done for all couples of pin combinations with other pins floating. 300 V CDM: charged device model(9) 9. Charged device model: all pins plus package are charged together to the specified voltage and then discharged directly to the ground. 1.5 kV Latch-up immunity 200 mA Table 2. Operating conditions Symbol Parameter Value Unit VCC Supply voltage 1.5 to 5.5 V Vicm Common mode input voltage range VCC- -0.1 to VCC+ +0.1 V Toper Operating free air temperature range -40 to +125 °C Electrical characteristics TSV6390, TSV6390A, TSV6391, TSV6391A 4/22 Doc ID 17118 Rev 1 2 Electrical characteristics Table 3. Electrical characteristics at VCC+ = +1.8 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C and RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio Offset voltage TSV6390-TSV6391 TSV6390A-TSV6391A 3 0.5 mV Tmin < Top < Tmax TSV6390-TSV6391 TSV6390A-TSV6391A 4.5 2 DVio Input offset voltage drift 2 μV/°C Iio Input offset current (1) (Vout = VCC/2) 1 10 pA Tmin < Top < Tmax 1 100 Iib Input bias current(1) (Vout = VCC/2) 1 10 pA Tmin < Top < Tmax 1 100 CMR Common mode rejection ratio 20 log (ΔVic/ΔVio) 0 V to 1.8 V, Vout = 0.9 V 53 74 dB Tmin < Top < Tmax 51 Avd Large signal voltage gain RL= 10 kΩ, Vout = 0.5 V to 1.3 V 85 95 dB Tmin < Top < Tmax 80 VOH High level output voltage RL = 10 kΩ 35 5 mV Tmin < Top < Tmax 50 VOL Low level output voltage RL = 10 kΩ 4 35 mV Tmin < Top < Tmax 50 Iout Isink Vout = 1.8 V 6 12 mA Tmin < Top < Tmax 4 Isource Vout = 0 V 6 10 mA Tmin < Top < Tmax 4 ICC Supply current SHDN = VCC No load, Vout = VCC/2 40 50 60 μA Tmin < Top < Tmax 62 AC performance GBP Gain bandwidth product RL = 10 kΩ, CL = 100 pF 2 MHz Gain Minimum gain for stability Phase margin = 60°, Rf = 10 kΩ, RL = 10 kΩ, CL = 20 pF +4 -3 V/V SR Slew rate RL = 10 kΩ, CL = 100 pF, Vout = 0.5 V to 1.3 V 0.7 V/μs en Equivalent input noise voltage f = 1 kHz f = 10 kHz 60 33 1. Guaranteed by design. nV Hz ----------- TSV6390, TSV6390A, TSV6391, TSV6391A Electrical characteristics Doc ID 17118 Rev 1 5/22 Table 4. Shutdown characteristics VCC = 1.8 V (TSV6390) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance ICC Supply current in shutdown mode (all operators) SHDN = VCC- 2.5 50 nA Tmin < Top < 85° C 200 nA Tmin < Top < 125° C 1.5 μA ton Amplifier turn-on time RL = 2 kΩ, Vout = VCC- to VCC - + 0.2 V 300 ns toff Amplifier turn-off time RL = 2 kΩ, Vout = VCC+ - 0.5 V to VCC+ - 0.7 V 20 ns VIH SHDN logic high 1.3 V VIL SHDN logic low 0.5 V IIH SHDN current high SHDN = VCC+ 10 pA IIL SHDN current low SHDN = VCC- 10 pA IOLeak Output leakage in shutdown mode SHDN = VCC- 50 pA Tmin < Top < Tmax 1 nA Electrical characteristics TSV6390, TSV6390A, TSV6391, TSV6391A 6/22 Doc ID 17118 Rev 1 Table 5. VCC+ = +3.3 V, VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C, RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio Offset voltage TSV6390-TSV6391 TSV6390A-TSV6391A 3 0.5 mV Tmin < Top < Tmax TSV6390-TSV6391 TSV6390A-TSV6391A 4.5 2 DVio Input offset voltage drift 2 μV/°C Iio Input offset current(1) 1 10 pA Tmin < Top < Tmax 1 100 Iib Input bias current(1) 1 10 pA Tmin < Top < Tmax 1 100 CMR Common mode rejection ratio 20 log (ΔVic/ΔVio) 0 V to 3.3 V, Vout = 1.65 V 57 79 dB Tmin < Top < Tmax 53 Avd Large signal voltage gain RL = 10 kΩ, Vout = 0.5 V to 2.8 V 88 98 dB Tmin < Top < Tmax 83 VOH High level output voltage RL = 10 kΩ 35 6 mV Tmin. < Top < Tmax 50 VOL Low level output voltage RL = 10 kΩ 7 35 mV Tmin < Top < Tmax 50 Iout Isink Vout = 3.3 V 23 45 mA Tmin < Top < Tmax 20 42 Isource Vout = 0 V 23 38 mA Tmin < Top < Tmax 20 ICC Supply current SHDN = VCC No load, Vout= VCC/2 43 55 64 μA Tmin < Top < Tmax 66 μA AC performance GBP Gain bandwidth product RL = 10 kΩ, CL = 100 pF 2.2 MHz Gain Minimum gain for stability Phase margin = 60°, Rf = 10 kΩ, RL = 10 kΩ, CL = 20 pF, +4 -3 V/V SR Slew rate RL = 10 kΩ, CL = 100 pF, Vout = 0.5 V to 2.8 V 0.9 V/μs en Equivalent input noise voltage f = 1 kHz 65 1. Guaranteed by design. nV Hz ----------- TSV6390, TSV6390A, TSV6391, TSV6391A Electrical characteristics Doc ID 17118 Rev 1 7/22 Table 6. Electrical characteristics at VCC+ = +5 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C and RL connected to VCC/2 (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance Vio Offset voltage TSV6390-TSV6391 TSV6390A-TSV6391A 3 0.5 mV Tmin < Top < Tmax TSV6390-TSV6391 TSV6390A-TSV6391A 4.5 2 mV DVio Input offset voltage drift 2 μV/°C Iio Input offset current(1) (Vout = VCC/2) 1 10 pA Tmin < Top < Tmax 1 100 Iib Input bias current(1) (Vout = VCC/2) 1 10 pA Tmin < Top < Tmax 1 100 CMR Common mode rejection ratio 20 log (ΔVic/ΔVio) 0 V to 5 V, Vout = 2.5 V 60 80 dB Tmin < Top < Tmax 55 SVR Supply voltage rejection ratio 20 log (ΔVCC/ΔVio) VCC = 1.8 to 5 V 75 93 dB Tmin < Top < Tmax 73 Avd Large signal voltage gain RL= 10 kΩ, Vout= 0.5 V to 4.5 V 89 98 dB Tmin < Top < Tmax 84 VOH High level output voltage RL = 10 kΩ 35 7 mV Tmin < Top < Tmax 50 VOL Low level output voltage RL = 10 kΩ 6 35 mV Tmin < Top < Tmax 50 Iout Isink Vout = 5 V 40 65 mA Tmin < Top < Tmax 35 Isource Vout = 0 V 40 72 mA Tmin < Top < Tmax 35 ICC Supply current SHDN = VCC No load, Vout=VCC/2 50 60 69 μA Tmin < Top < Tmax 72 AC performance GBP Gain bandwidth product RL = 10 kΩ, CL = 100 pF 2.4 MHz Gain Minimum gain for stability Phase margin = 60°, Rf = 10 kΩ, RL = 10 kΩ, CL = 20 pF, +4 -3 V/V SR Slew rate RL = 10 kΩ, CL = 100 pF 1.1 V/μs Electrical characteristics TSV6390, TSV6390A, TSV6391, TSV6391A 8/22 Doc ID 17118 Rev 1 en Equivalent input noise voltage f = 1 kHz f = 10 kHz 60 33 THD+N Total harmonic distortion + noise Av = -10, fin = 1 kHz, R= 100 kΩ, Vicm = Vcc/2, Vin = 40 mVpp 0.11 % 1. Guaranteed by design. Table 6. Electrical characteristics at VCC+ = +5 V with VCC- = 0 V, Vicm = VCC/2, Tamb = 25° C and RL connected to VCC/2 (unless otherwise specified) (continued) Symbol Parameter Conditions Min. Typ. Max. Unit nV Hz ----------- Table 7. Shutdown characteristics VCC = 5 V (TSV6390) Symbol Parameter Conditions Min. Typ. Max. Unit DC performance ICC Supply current in shutdown mode (all operators) SHDN = VCC- 5 50 nA Tmin < Top < 85° C 200 nA Tmin < Top < 125° C 1.5 μA ton Amplifier turn-on time RL = 2 kΩ, Vout = VCC- to VCC - + 0.2 V 300 ns toff Amplifier turn-off time RL = 2 Ω, Vout = VCC+ - 0.5 V to VCC+ - 0.7 V 30 ns VIH SHDN logic high 4.5 V VIL SHDN logic low 0.5 V IIH SHDN current high SHDN = VCC+ 10 pA IIL SHDN current low SHDN = VCC- 10 pA IOLeak Output leakage in shutdown mode SHDN = VCC- 50 pA Tmin < Top < Tmax 1 nA TSV6390, TSV6390A, TSV6391, TSV6391A Electrical characteristics Doc ID 17118 Rev 1 9/22 Figure 1. Supply current vs. supply voltage at Vicm = VCC/2 Figure 2. Output current vs. output voltage at VCC = 1.5 V Figure 3. Output current vs. output voltage at VCC = 5 V Figure 4. Peaking at closed loop gain = -10 10000 100000 1000000 0 5 10 15 20 VCC=5V VCC=1.5V Closed loop gain = -10 T=25 C,CLoad=100pF, Vicm=VCC/2, RLoad=2.2kΩ for Iout giving minimum stability on a typical part Gain (dB) Frequency (Hz) Figure 5. Peaking at closed loop gain = -3 at VCC = 1.5 V Figure 6. Peaking at closed loop gain = -3 at VCC = 5 V 10000 100000 1000000 0 2 4 6 8 10 12 14 RLoad=100kΩ RLoad T=25 C, V =2.2kΩ icm=VCC/2 ACL=-3, VCC=1.5V CLoad=33pF RLoad= 100kΩ connected to VCC/2 RLoad= 2.2kΩ for Iout giving minimum stability on a typical part Gain (dB) Frequency (Hz) 10000 100000 1000000 0 2 4 6 8 10 12 14 RLoad=2.2kΩ T=25 C, Vicm=VCC/2 ACL=-3, VCC=5V CLoad=33pF RLoad=100kΩ RLoad= 100kΩ connected to VCC/2 RLoad= 2.2kΩ for Iout giving minimum stability on a typical part Gain (dB) Frequency (Hz) Electrical characteristics TSV6390, TSV6390A, TSV6391, TSV6391A 10/22 Doc ID 17118 Rev 1 Figure 7. Positive slew rate vs. supply voltage Figure 8. Negative slew rate vs. supply voltage Figure 9. Distortion + noise vs. output voltage at VCC = 1.8 V Figure 10. Distortion + noise vs. output voltage at VCC = 5 V RLoad=2kΩ, CLoad=100pF, ACL=−10 Vin: from 0.5V to VCC+− 0.5V SR calculated from 10% to 90% Vicm=VCC/2 T=25°C T=125°C T=−40°C Slew rate (V/ s) Supply voltage (V) T=25°C RLoad=2kΩ, CLoad=100pF, ACL=−10 Vin: from VCC+−0.5V to 0.5V SR calculated from 10% to 90% Vicm=VCC/2 T=125°C T=−40°C Slew rate (V/ s) Supply voltage (V) Ω Ω THD + N (%) Output voltage (Vrms) Ω Ω THD + N (%) Ouput voltage (Vrms) Figure 11. Slew rate timing Figure 12. Noise vs. frequency at VCC = 5 V Vin Vout RLoad=2kΩ, CLoad=100pF, Vicm=VCC/2, ACL=−10 T=25°C, VCC=5V Amplitude (V) Time (μs) 10 100 1000 10000 10 100 Equivalent Input Voltage Noise (nV/VHz) Vcc=5V Tamb=25 C Vicm=4.5V Vicm=2.5V TSV6390, TSV6390A, TSV6391, TSV6391A Application information Doc ID 17118 Rev 1 11/22 3 Application information 3.1 Operating voltages The TSV6390 and TSV6391 can operate from 1.5 to 5.5 V. Their parameters are fully specified for 1.8, 3.3 and 5 V power supplies. However, the parameters are very stable in the full VCC range and several characterization curves show the TSV639x characteristics at 1.5 V. Additionally, the main specifications are guaranteed in extended temperature ranges from -40° C to +125° C. 3.2 Rail-to-rail input The TSV6390 and TSV6391 are built with two complementary PMOS and NMOS input differential pairs. The devices have a rail-to-rail input, and the input common mode range is extended from VCC- -0.1 V to VCC+ +0.1 V. The transition between the two pairs appears at VCC+ -0.7 V. In the transition region, the performance of CMRR, PSRR, Vio and THD is slightly degraded (as shown in Figure 13 and Figure 14 for Vio vs. Vicm). The devices are guaranteed without phase reversal. 3.3 Rail-to-rail output The operational amplifiers’ output levels can go close to the rails: 35 mV maximum above and below the rail when connected to a 10 kΩ resistive load to VCC/2. 3.4 Shutdown function (TSV6390) The operational amplifier is enabled when the SHDN pin is pulled high. To disable the amplifier, the SHDN must be pulled down to VCC-. When in shutdown mode, the amplifier’s output is in a high impedance state. The SHDN pin must never be left floating, but tied to VCC+ or VCC-. Figure 13. Input offset voltage vs input common mode at VCC = 1.5 V Figure 14. Input offset voltage vs input common mode at VCC = 5 V -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 0.4 0.5 Input Offset Voltage (mV) Input Common Mode Voltage (V) 0.0 1.0 2.0 3.0 4.0 5.0 -0.4 -0.2 0.0 0.2 0.4 Input Offset Voltage (mV) Input Common Mode Voltage (V) Application information TSV6390, TSV6390A, TSV6391, TSV6391A 12/22 Doc ID 17118 Rev 1 The turn-on and turn-off times are calculated for an output variation of ±200 mV (Figure 15 and Figure 16 show the test configurations). Figure 15. Test configuration for turn-on time (Vout pulled down) Figure 16. Test configuration for turn-off time (Vout pulled down) + VCC GND 2 KΩ + - DUT GND VCC - 0.5 V + VCC GND 2 KΩ + - DUT GND VCC - 0.5 V Figure 17. Turn-on time, VCC = 5 V, Vout pulled down, T = 25° C Figure 18. Turn-off time, VCC= 5 V, Vout pulled down, T = 25° C Shutdown pulse Vout Vcc = 5V T = 25°C Voltage (V) Time( s) Shutdown pulse Vout Vcc = 5V T = 25°C Output voltage (V) Time( s) TSV6390, TSV6390A, TSV6391, TSV6391A Application information Doc ID 17118 Rev 1 13/22 3.5 Optimization of DC and AC parameters These devices use an innovative approach to reduce the spread of the main DC and AC parameters. An internal adjustment achieves a very narrow spread of the current consumption (60 μA typical, min/max at ±17 %). Parameters linked to the current consumption value, such as GBP, SR and AVd, benefit from this narrow dispersion. 3.6 Driving resistive and capacitive loads These products are micropower, low-voltage operational amplifiers optimized to drive rather large resistive loads, above 2 kΩ. For lower resistive loads, the THD level may significantly increase. These operational amplifiers have a relatively low internal compensation capacitor, making them very fast while consuming very little. They are ideal when used in a non-inverting configuration or in an inverting configuration in the following conditions. ● IGainI ≥ 3 in an inverting configuration (CL = 20 pF, RL = 100 kΩ) or IgainI ≥ 10 (CL = 100 pF, RL = 100 kΩ) ● Gain ≥ +4 in a non-inverting configuration (CL = 20 pF, RL = 100 kΩ) or gain ≥ +11 (CL = 100 pF, RL= 100 kΩ) As these operational amplifiers are not unity gain stable, for a low closed-loop gain it is recommended to use the TSV62x (29 μA, 420 kHz) or TSV63x (60 μA, 880 kHz) which are unity gain stable. 3.7 PCB layouts For correct operation, it is advised to add 10 nF decoupling capacitors as close as possible to the power supply pins. 3.8 Macromodel An accurate macromodel of the TSV6390 and TSV6391 is available on STMicroelectronics’ web site at www.st.com. This model is a trade-off between accuracy and complexity (that is, time simulation) of the TSV639x operational amplifiers. It emulates the nominal performances of a typical device within the specified operating conditions mentioned in the datasheet. It also helps to validate a design approach and to select the right operational amplifier, but it does not replace on-board measurements. Table 8. Related products Part # Icc (μA) at 5 V GBP (MHz) SR (V/μs) Minimum gain for stability (CLoad = 100 pF) TSV620-1 29 0.42 0.14 1 TSV6290-1 29 1.3 0.5 +11 TSV630-1 60 0.88 0.34 1 TSV6390-1 60 2.4 1.1 +11 Package information TSV6390, TSV6390A, TSV6391, TSV6391A 14/22 Doc ID 17118 Rev 1 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. TSV6390, TSV6390A, TSV6391, TSV6391A Package information Doc ID 17118 Rev 1 15/22 4.1 SOT23-5 package mechanical data Figure 19. SOT23-5L package mechanical drawing Table 9. SOT23-5L package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 0.90 1.20 1.45 0.035 0.047 0.057 A1 0.15 0.006 A2 0.90 1.05 1.30 0.035 0.041 0.051 B 0.35 0.40 0.50 0.013 0.015 0.019 C 0.09 0.15 0.20 0.003 0.006 0.008 D 2.80 2.90 3.00 0.110 0.114 0.118 D1 1.90 0.075 e 0.95 0.037 E 2.60 2.80 3.00 0.102 0.110 0.118 F 1.50 1.60 1.75 0.059 0.063 0.069 L 0.10 0.35 0.60 0.004 0.013 0.023 K 0° 10° Package information TSV6390, TSV6390A, TSV6391, TSV6391A 16/22 Doc ID 17118 Rev 1 4.2 SOT23-6 package mechanical data Figure 20. SOT23-6L package mechanical drawing Table 10. SOT23-6L package mechanical data Ref. Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 0.90 1.45 0.035 0.057 A1 0.10 0.004 A2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.013 0.019 c 0.09 0.20 0.003 0.008 D 2.80 3.05 0.110 0.120 E 1.50 1.75 0.060 0.069 e 0.95 0.037 H 2.60 3.00 0.102 0.118 L 0.10 0.60 0.004 0.024 ° 0 10° TSV6390, TSV6390A, TSV6391, TSV6391A Package information Doc ID 17118 Rev 1 17/22 4.3 SC70-5 (or SOT323-5) package mechanical data Figure 21. SC70-5 (or SOT323-5) package mechanical drawing Table 11. SC70-5 (or SOT323-5) package mechanical data Ref Dimensions Millimeters Inches Min Typ Max Min Typ Max A 0.80 1.10 0.315 0.043 A1 0.10 0.004 A2 0.80 0.90 1.00 0.315 0.035 0.039 b 0.15 0.30 0.006 0.012 c 0.10 0.22 0.004 0.009 D 1.80 2.00 2.20 0.071 0.079 0.087 E 1.80 2.10 2.40 0.071 0.083 0.094 E1 1.15 1.25 1.35 0.045 0.049 0.053 e 0.65 0.025 e1 1.30 0.051 L 0.26 0.36 0.46 0.010 0.014 0.018 < 0° 8° SEATING PLANE GAUGE PLANE DIMENSIONS IN MM SIDE VIEW TOP VIEW COPLANAR LEADS Package information TSV6390, TSV6390A, TSV6391, TSV6391A 18/22 Doc ID 17118 Rev 1 4.4 SC70-6 (or SOT323-6) package mechanical data Figure 22. SC70-6 (or SOT323-6) package mechanical drawing Table 12. SC70-6 (or SOT323-6) package mechanical data Ref Dimensions Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 0.80 1.10 0.031 0.043 A1 0.10 0.004 A2 0.80 1.00 0.031 0.039 b 0.15 0.30 0.006 0.012 c 0.10 0.18 0.004 0.007 D 1.80 2.20 0.071 0.086 E 1.15 1.35 0.045 0.053 e 0.65 0.026 HE 1.80 2.40 0.071 0.094 L 0.10 0.40 0.004 0.016 Q1 0.10 0.40 0.004 0.016 TSV6390, TSV6390A, TSV6391, TSV6391A Package information Doc ID 17118 Rev 1 19/22 Figure 23. SC70-6 (or SOT323-6) package footprint Ordering information TSV6390, TSV6390A, TSV6391, TSV6391A 20/22 Doc ID 17118 Rev 1 5 Ordering information Table 13. Order codes Part number Temperature range Package Packing Marking TSV6390ILT -40°C to +125°C SOT23-6 Tape & reel K109 TSV6390ICT SC70-6 K19 TSV6390AILT SOT23-6 K142 TSV6390AICT SC70-6 K42 TSV6391ILT SOT23-5 K108 TSV6391ICT SC70-5 K20 TSV6391AILT SOT23-5 K141 TSV6391AICT SC70-5 K41 TSV6390, TSV6390A, TSV6391, TSV6391A Revision history Doc ID 17118 Rev 1 21/22 6 Revision history Table 14. Document revision history Date Revision Changes 09-Mar-2010 1 Initial release. TSV6390, TSV6390A, TSV6391, TSV6391A 22/22 Doc ID 17118 Rev 1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com General Description The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24 communications interface devices feature low power consumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmitter output pins are protected to ±15kV using the Human Body Model. A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1μF capacitors for operation from a +3.3V supply. Each device guarantees operation at data rates of 250kbps while maintaining RS-232 output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232- compliant output levels. The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1μA shutdown mode that reduces power consumption in battery-powered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1μA of supply current. The MAX3222E and MAX3232E are pin, package, and functionally compatible with the industry-standard MAX242 and MAX232, respectively. The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/ three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shutdown mode in which all receivers remain active, while consuming only 1μA (MAX3241E/MAX3246E) or 10nA (MAX3237E). The MAX3222E, MAX3232E, and MAX3241E are available in space-saving SO, SSOP, TQFN and TSSOP packages. The MAX3237E is offered in an SSOP package. The MAX3246E is offered in the ultra-small 6 x 6 UCSP™ package. Applications Battery-Powered Equipment Printers Cell Phones Smart Phones Cell-Phone Data Cables xDSL Modems Notebook, Subnotebook, and Palmtop Computers Next-Generation Device Features ♦ For Space-Constrained Applications MAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V, RS-232 Transceivers in UCSP ♦ For Low-Voltage or Data Cable Applications MAX3380E/MAX3381E: +2.35V to +5.5V, 1μA, 2Tx/2Rx, RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ________________________________________________________________ Maxim Integrated Products 1 19-1298; Rev 10; 1/06 _______________Ordering Information Ordering Information continued at end of data sheet. *Dice are tested at TA = +25°C, DC parameters only. **EP = Exposed paddle. Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. PART TEMP RANGE PINPACKAGE PKG CODE MAX3222ECTP 0°C to +70°C 20 Thin QFNEP** (5mm x 5mm) T2055-5 MAX3222ECUP 0°C to +70°C 20 TSSOP — MAX3222ECAP 0°C to +70°C 20 SSOP — MAX3222ECWN 0°C to +70°C 18 Wide SO — MAX3222ECPN 0°C to +70°C 18 Plastic DIP — MAX3222EC/D 0°C to +70°C Dice* — MAX3222EETP -40°C to +85°C 20 Thin QFNEP** (5mm x 5mm) T2055-5 MAX3222EEUP -40°C to +85°C 20 TSSOP — MAX3222EEAP -40°C to +85°C 20 SSOP — MAX3222EEWN -40°C to +85°C 18 Wide SO — MAX3222EEPN -40°C to +85°C 18 Plastic DIP — MAX3232ECAE 0°C to +70°C 16 SSOP — MAX3232ECWE 0°C to +70°C 16 Wide SO — MAX3232ECPE 0°C to +70°C 16 Plastic DIP — MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc. †Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending. MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 2 _______________________________________________________________________________________ ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. VCC to GND..............................................................-0.3V to +6V V+ to GND (Note 1) ..................................................-0.3V to +7V V- to GND (Note 1) ...................................................+0.3V to -7V V+ + |V-| (Note 1).................................................................+13V Input Voltages T_IN, EN, SHDN, MBAUD to GND ........................-0.3V to +6V R_IN to GND .....................................................................±25V Output Voltages T_OUT to GND...............................................................±13.2V R_OUT, R_OUTB (MAX3241E)................-0.3V to (VCC + 0.3V) Short-Circuit Duration, T_OUT to GND.......................Continuous Continuous Power Dissipation (TA = +70°C) 16-Pin SSOP (derate 7.14mW/°C above +70°C) ..........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C) .......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C) .....1666.7mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C) .....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW 20-Pin TQFN (derate 21.3mW/°C above +70°C) ........1702mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C) ........879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C) ..........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C) ......1026mW 32-Lead Thin QFN (derate 33.3mW/°C above +70°C)..2666mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C).............1010mW Operating Temperature Ranges MAX32_ _EC_ _ ...................................................0°C to +70°C MAX32_ _EE_ _.................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Bump Reflow Temperature (Note 2) Infrared, 15s..................................................................+200°C Vapor Phase, 20s..........................................................+215°C Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is required. Hand or wave soldering is not allowed. PARAMETER CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS (VCC = +3.3V or +5V, TA = +25°C) MAX3222E, MAX3232E, MAX3241E, MAX3246E 0.3 1 Supply Current SHDN = VCC, no load MAX3237E 0.5 2.0 mA SHDN = GND 1 10 μA Shutdown Supply Current SHDN = R_IN = GND, T_IN = GND or VCC (MAX3237E) 10 300 nA LOGIC INPUTS Input Logic Low T_IN, EN, SHDN, MBAUD 0.8 V VCC = +3.3V 2.0 Input Logic High T_IN, EN, SHDN, MBAUD VCC = +5.0V 2.4 V Transmitter Input Hysteresis 0.5 V T_IN, EN, SHDN MAX3222E, MAX3232E, MAX3241E, MAX3246E ±0.01 ±1 Input Leakage Current T_IN, SHDN, MBAUD MAX3237E (Note 5) 9 18 μA RECEIVER OUTPUTS Output Leakage Current R_OUT (MAX3222E/MAX3237E/MAX3241E/ MAX3246E), EN = VCC, receivers disabled ±0.05 ±10 μA Output-Voltage Low IOUT = 1.6mA (MAX3222E/MAX3232E/MAX3241E/ MAX3246E), IOUT = 1.0mA (MAX3237E) 0.4 V MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER CONDITIONS MIN TYP MAX UNITS Output-Voltage High IOUT = -1.0mA VCC - 0.6 VCC - 0.1 V RECEIVER INPUTS Input Voltage Range -25 +25 V VCC = +3.3V 0.6 1.1 Input Threshold Low TA = +25°C VCC = +5.0V 0.8 1.5 V VCC = +3.3V 1.5 2.4 Input Threshold High TA = +25°C VCC = +5.0V 2.0 2.4 V Input Hysteresis 0.5 V Input Resistance TA = +25°C 3 5 7 kΩ TRANSMITTER OUTPUTS Output Voltage Swing All transmitter outputs loaded with 3kΩ to ground (Note 6) ±5 ±5.4 V Output Resistance VCC = 0, transmitter output = ±2V 300 50k Ω Output Short-Circuit Current ±60 mA Output Leakage Current V C C = 0 or + 3.0V to + 5.5V , V OU T = ± 12V , tr ansm i tter s d i sab l ed ( M AX 3222E /M AX 3232E /M AX 3241E /M AX 3246E ) ±25 μA MOUSE DRIVABILITY (MAX3241E) Transmitter Output Voltage T1IN = T2IN = GND, T3IN = VCC, T3OUT loaded with 3kΩ to GND, T1OUT and T2OUT loaded with 2.5mA each ±5 V ESD PROTECTION Human Body Model ±15 IEC 1000-4-2 Air-Gap Discharge (except MAX3237E) ±15 IEC 1000-4-2 Contact Discharge (except MAX3237E) ±8 R_IN, T_OUT IEC 1000-4-2 Contact Discharge (MAX3246E only) ±9 kV Human Body Model ±15 IEC1000-4-2 Air-Gap Discharge ±15 T_IN, R_IN, R_OUT, EN, SHDN, MBAUD MAX3237E IEC1000-4-2 Contact Discharge ±8 kV MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 4 _______________________________________________________________________________________ TIMING CHARACTERISTICS—MAX3237E (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 3) Note 3:MAX3222E/MAX3232E/MAX3241E: C1–C4 = 0.1μF tested at +3.3V ±10%; C1 = 0.047μF, C2, C3, C4 = 0.33μF tested at +5.0V ±10%. MAX3237E: C1–C4 = 0.1μF tested at +3.3V ±5%, C1–C4 = 0.22μF tested at +3.3V ±10%; C1 = 0.047μF, C2, C3, C4 = 0.33μF tested at +5.0V ±10%. MAX3246E; C1-C4 = 0.22μF tested at +3.3V ±10%; C1 = 0.22μF, C2, C3, C4 = 0.54μF tested at 5.0V ±10%. Note 4: MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range. Note 5: The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are at the supply rails. Note 6: MAX3241EEUI is specified at TA = +25°C. Note 7: Transmitter skew is measured at the transmitter zero crosspoints. PARAMETER CONDITIONS MIN TYP MAX UNITS RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = GND 250 VCC = +3.0V to +4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching, MBAUD = VCC Maximum Data Rate 1000 VCC = +4.5V to +5.5V, RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = VCC 1000 kbps tPHL 0.15 Receiver Propagation Delay R_IN to R_OUT, CL = 150pF tPLH 0.15 μs Receiver Output Enable Time Normal operation 2.6 μs Receiver Output Disable Time Normal operation 2.4 μs | tPHL - tPLH |, MBAUD = GND Transmitter Skew (Note 7) | tPHL - tPLH |, MBAUD = VCC 100 ns Receiver Skew | tPHL - tPLH | 50 ns CL = 150pF MBAUD = GND 6 30 to 1000pF MBAUD = VCC 24 150 VCC = +3.3V, RL = 3kΩ to 7kΩ, +3.0V to -3.0V or -3.0V to +3.0V, TA = +25°C CL = 150pF to 2500pF, MBAUD = GND 4 30 Transition-Region Slew Rate V/μs TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246E (VCC = +3V to +5.5V, C1–C4 = 0.1μF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 3, 4) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TA = TMIN to TMAX (MAX3222E/MAX3232E/ MAX3241E) (Note 6) 250 Maximum Data Rate RL = 3kΩ, CL = 1000pF, one transmitter switching TA = + 25°C ( M AX 3246E ) 250 kbps tPHL 0.15 Receiver Propagation Delay tPLH Receiver input to receiver output, CL = 150pF 0.15 μs Receiver Output Enable Time Normal operation (except MAX3232E) 200 ns Receiver Output Disable Time Normal operation (except MAX3232E) 200 ns Transmitter Skew |tPHL - tPLH| (Note 7) 100 ns Receiver Skew |tPHL - tPLH| 50 ns Transition-Region Slew Rate V C C = + 3.3V , TA = + 25°C , RL = 3kΩ to 7kΩ , m easur ed fr om + 3.0V to - 3.0V or - 3.0V to + 3.0V , one tr ansm i tter sw i tchi ng CL = 150pF to 1000pF 6 30 V/μs MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers _______________________________________________________________________________________ 5 -6 -4 -2 0 2 4 6 0 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND) MAX3237E toc07 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) 500 1000 1500 2000 2500 3000 FOR DATA RATES UP TO 250kbps 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 5 3 1 -1 -3 -5 VOUT+ VOUT- -6 -2 -4 2 0 4 6 -5 -3 1 -1 3 5 0 500 1000 1500 2000 2500 3000 MAX3246E toc07A LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) VOUTVOUT+ FOR DATA RATES UP TO 250kbps 1 TRANSMITTER 250kbps 4 TRANSMITTERS 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE -7.5 -5.0 -2.5 0 2.5 5.0 7.5 0 MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = VCC) MAX3237E toc08 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) 500 1000 1500 2000 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD, EACH OUTPUT 2Mbps 1.5Mbps 1Mbps 2Mbps 1Mbps 1.5Mbps __________________________________________Typical Operating Characteristics (VCC = +3.3V, 250kbps data rate, 0.1μF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 0 1000 2000 3000 4000 5000 MAX3241E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3237E to04 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps VOUT+ VOUT- 0 30 20 10 40 50 60 0 1000 2000 3000 4000 5000 MAX3241E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3237E toc06 LOAD CAPACITANCE (pF) SUPPLY CURRENT (mA) 250kbps 120kbps 20kbps 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 0 4 2 8 6 12 10 14 0 1000 2000 3000 4000 5000 MAX3241E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc05 LOAD CAPACITANCE (pF) SLEW RATE (V/μs) -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 0 1000 2000 3000 4000 5000 MAX3222E/MAX3232E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3237E toc01 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps VOUT+ VOUT- 0 6 2 4 10 8 14 12 16 0 1000 2000 3000 4000 5000 MAX3222E/MAX3232E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc02 LOAD CAPACITANCE (pF) SLEW RATE (V/μs) +SLEW FOR DATA RATES UP TO 250kbps -SLEW 0 25 20 15 5 10 35 30 40 45 0 1000 2000 3000 4000 5000 MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3237E toc03 LOAD CAPACITANCE (pF) SUPPLY CURRENT (mA) 250kbps 120kbps 20kbps T1 TRANSMITTING AT 250kbps T2 TRANSMITTING AT 15.6kbps MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (VCC = +3.3V, 250kbps data rate, 0.1μF capacitors, all transmitters loaded with 3kΩ and CL, TA = +25°C, unless otherwise noted.) 0 20 60 40 80 100 0 MAX3237E TRANSMITTER SKEW vs. LOAD CAPACITANCE (MBAUD = VCC) MAX3237E toc12 LOAD CAPACITANCE (pF) 500 1000 1500 2000 TRANSMITTER SKEW (ns) |tPLH - tPHL| 1 TRANSMITTER AT 500kbps 4 TRANSMITTERS AT 1/16 DATA RATE ALL TRANSMITTERS LOADED WITH 3kΩ + CL -6 -2 -4 2 0 4 6 -3 -5 1 -1 3 5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 MAX3237E toc13 SUPPLY VOLTAGE (V) TRANSMITTER OUTPUT VOLTAGE (V) VOUTVOUT+ 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ +1000pF MAX3237E TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND) 0 10 20 30 40 50 2.0 MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND) MAX3237E toc14 SUPPLY VOLTAGE (V) SUPPLY CURRENT (mA) 2.5 3.0 3.5 4.0 4.5 5.0 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ AND 1000pF MAX3246E TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE MAX3237E toc15 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE (V) 1000 2000 3000 4000 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 -6 0 5000 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps VOUTVOUT+ 4 6 8 10 12 14 16 0 MAX3246E SLEW RATE vs. LOAD CAPACITANCE MAX3237E toc16 LOAD CAPACITANCE (pF) SLEW RATE (V/μs) 1000 2000 3000 4000 5000 SR+ SR- 0 10 20 30 40 50 60 0 MAX3246E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3237E toc17 LOAD CAPACITANCE (pF) SUPPLY CURRENT (mA) 1000 2000 3000 4000 5000 1 TRANSMITTER AT 250kbps 2 TRANSMITTERS AT 15.6kbps 55 45 35 25 15 5 250kbps 120kbps 20kbps 0 2 4 6 8 10 12 0 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = GND) MAX3237E toc09 LOAD CAPACITANCE (pF) SLEW RATE (V/μs) 500 1000 1500 2000 2500 3000 SR+ SR- 1 TRANSMITTER AT 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL 0 10 20 30 50 40 60 70 0 MAX3237E SLEW RATE vs. LOAD CAPACITANCE (MBAUD = VCC) MAX3237E toc10 LOAD CAPACITANCE (pF) SLEW RATE (V/μs) 500 1000 1500 2000 -SLEW, 1Mbps +SLEW, 1Mbps 1 TRANSMITTER AT FULL DATA RATE 4 TRANSMITTERS AT 1/16 DATA RATE 3kΩ + CL LOAD EACH OUTPUT -SLEW, 2Mbps +SLEW, 2Mbps 0 10 20 30 40 50 0 MAX3237E SUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND) MAX3237E toc11 LOAD CAPACITANCE (pF) SUPPLY CURRENT (mA) 500 1000 1500 2000 2500 3000 250kbps 120kbps 20kbps 1 TRANSMITTER AT 20kbps, 120kbps, 250kbps 4 TRANSMITTERS AT 15.6kbps ALL TRANSMITTERS LOADED WITH 3kΩ + CL MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers _______________________________________________________________________________________ 7 *These pins have an active positive feedback resistor internal to the MAX3237E, allowing unused inputs to be left unconnected. Pin Description PIN MAX3222E MAX3232E MAX3241E TQFN SO/ DIP TSSOP/ SSOP TQFN SO/DIP/ SSOP/ 16-PIN TSSOP 20-PIN TSSOP MAX3237E SSOP/ SO QFN MAX3246E NAME FUNCTION 19 1 1 — — — 13* 23 22 B3 EN Receiver Enable. Active low. 1 2 2 16 1 2 28 28 28 F3 C1+ Positive Terminal of Voltage-Doubler Charge- Pump Capacitor 20 3 3 15 2 3 27 27 27 F1 V+ +5.5V Generated by the Charge Pump 2 4 4 1 3 4 25 24 23 F4 C1- Negative Terminal of Voltage-Doubler Charge- Pump Capacitor 3 5 5 2 4 5 1 1 29 E1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor 4 6 6 3 5 6 3 2 30 D1 C2- Negative Terminal of Inverting Charge-Pump Capacitor 5 7 7 4 6 7 4 3 31 C1 V- -5.5V Generated by the Charge Pump 6, 15 8, 15 8, 17 5, 12 7, 14 8, 17 5, 6, 7, 10, 12 9, 10, 11 6, 7, 8 F6, E6, D6 T_OUT RS-232 Transmitter Outputs 7, 14 9, 14 9, 16 6, 11 8, 13 9, 16 8, 9, 11 4–8 1–5 A4, A5, A6, B6, C6 R_IN RS-232 Receiver Inputs 8, 13 10, 13 10, 15 7, 10 9, 12 12, 15 18, 20, 21 15–19 13, 14, 15, 17, 18 C2, B1, A1, A2, A3 R_OUT TTL/CMOS Receiver Outputs 10, 11 11, 12 12, 13 8, 9 10, 11 13, 14 17*, 19*, 22*, 23*, 24* 12, 13, 14 10, 11, 12 E3, E2, D2 T_IN TTL/CMOS Transmitter Inputs MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 8 _______________________________________________________________________________________ Pin Description (continued) PIN MAX3222E MAX3232E MAX3241E TQFN SO/ DIP TSSOP/ SSOP TQFN SO/DIP/ SSOP/ 16-PIN TSSOP 20-PIN TSSOP MAX3237E SSOP/ SO/ TSSOP QFN MAX3246E NAME FUNCTION 16 16 18 13 15 18 2 25 24 F5 GND Ground 17 17 19 14 16 19 26 26 26 F2 VCC +3.0V to +5.5V Supply Voltage 18 18 20 — — — 14* 22 21 B2 SHDN Shutdown Control. Active low. 9, 12 — 11, 14 — — 1, 10, 11, 20 — — 9, 16, 25, 32 C3, D3, B4, C4, D4, E4, B5, C5, D5, E5 N.C. No Connection. For MAX3246E, these locations are not populated with solder bumps. — — — — — — 15* — — — MBAUD MegaBaud Control Input. Connect to GND for normal operation; connect to VCC for 1Mbps transmission rates. — — — — — — 16 20, 21 19, 20 — R_OUTB Noninverting Complementary Receiver Outputs. Always active. EP — — EP — — — — EP — GND Exposed Paddle. Solder the exposed paddle to the ground alone or leave unconnected. MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers _______________________________________________________________________________________ 9 Detailed Description Dual Charge-Pump Voltage Converter The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246Es’ internal power supply consists of a regulated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V VCC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1). RS-232 Transmitters The transmitters are inverting level translators that convert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compliant levels. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3kΩ in parallel with 1000pF, providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be paralleled to drive multiple receivers or mice. The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forced into a high-impedance state when the device is in shutdown mode (SHDN = GND). The MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown. The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or VCC. The MAX3237E’s transmitter inputs have a 400kΩ active positive-feedback resistor, allowing unused inputs to be left unconnected. MAX3237E MegaBaud Operation For higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = VCC), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3kΩ in parallel with 250pF for +3.0V < VCC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3kΩ in parallel with 1000pF. RS-232 Receivers The receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/ MAX3246E receivers have inverting three-state outputs. Drive EN high to place the receiver(s) into a highimpedance state. Receivers can be either active or inactive in shutdown (Table 1). MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 5kΩ R_ OUT R_ IN C2- C2+ C1- C1+ VV+ VCC C4 C1 C3 C2 0.1μF VCC T_ IN T_ OUT GND 7kΩ 150pF MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 5kΩ R_ OUT R_ IN C2- C2+ C1- C1+ VV+ VCC C4 C1 C3 C2 0.1μF VCC T_ IN T_ OUT GND 3kΩ 1000pF (2500pF, MAX3237E only) MINIMUM SLEW-RATE TEST CIRCUIT MAXIMUM SLEW-RATE TEST CIRCUIT Figure 1. Slew-Rate Test Circuits LapLink is a trademark of Traveling Software. MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 10 ______________________________________________________________________________________ The complementary outputs on the MAX3237E/ MAX3241E (R_OUTB) are always active, regardless of the state of EN or SHDN. This allows the device to be used for ring indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where VCC drops to zero in shutdown to accommodate peripherals such as UARTs (Figure 2). MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown Mode Supply current falls to less than 1μA in shutdown mode (SHDN = low). The MAX3237E’s supply current falls to10nA (typ) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3). When shut down, the device’s charge pumps are shut off, V+ is pulled down to VCC, V- is pulled to ground, and the transmitter outputs are disabled (high impedance). The time required to recover from shutdown is typically 100μs, as shown in Figure 3. Connect SHDN to VCC if shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB (MAX3237E/MAX3241E). ±15kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated to protect against electrostatic discharges encountered during handling and assembly. The driver outputs and receiver inputs of the MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation, shutdown, and powered down. After an ESD event, Maxim’s E versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup. Furthermore, the MAX3237E logic I/O pins also have ±15kV ESD protection. Protecting the logic I/O pins to ±15kV makes the MAX3237E ideal for data cable applications. T1OUT R1OUTB Tx 5kΩ UART VCC T1IN LOGIC TRANSITION DETECTOR R1OUT R1IN THREE-STATED EN = VCC SHDN = GND VCC TO μP Rx PREVIOUS RS-232 Tx UART PROTECTION DIODE PROTECTION DIODE SHDN = GND VCC VCC GND Rx 5kΩ a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM A ACTIVE RECEIVER OUTPUT IN SHUTDOWN. b) NEW MAX3237E/MAX3241E: EN SHUTS DOWN RECEIVER OUTPUTS B (EXCEPT FOR B OUTPUTS), SO NO CURRENT FLOWS TO UART IN SHUTDOWN. B B OUTPUTS INDICATE RECEIVER ACTIVITY DURING SHUTDOWN WITH EN HIGH. GND MAX3237E/MAX3241E Figure 2. Detection of RS-232 Activity when the UART and Interface are Shut Down; Comparison of MAX3237E/MAX3241E (b) with Previous Transceivers (a) 40μs/div SHDN T2OUT T1OUT 5V/div 0 2V/div 0 VCC = 3.3V C1–C4 = 0.1μF Figure 3. Transmitter Outputs Recovering from Shutdown or Powering Up MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 11 ESD protection can be tested in various ways; the transmitter outputs and receiver inputs for the MAX3222E/MAX3232E/MAX3241E/MAX3246E are characterized for protection to the following limits: • ±15kV using the Human Body Model • ±8kV using the Contact Discharge method specified in IEC 1000-4-2 • ±9kV (MAX3246E only) using the Contact Discharge method specified in IEC 1000-4-2 • ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 CHARGE-CURRENTLIMIT RESISTOR DISCHARGE RESISTANCE STORAGE CAPACITOR Cs 100pF RC 1MΩ RD 1500Ω HIGHVOLTAGE DC SOURCE DEVICEUNDERTEST Figure 4a. Human Body ESD Test Model IP 100% 90% 36.8% tRL TIME tDL CURRENT WAVEFORM PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Ir 10% 0 0 AMPERES Figure 4b. Human Body Model Current Waveform CHARGE-CURRENTLIMIT RESISTOR DISCHARGE RESISTANCE STORAGE CAPACITOR Cs 150pF RC 50MΩ to 100MΩ RD 330Ω HIGHVOLTAGE DC SOURCE DEVICEUNDERTEST Figure 5a. IEC 1000-4-2 ESD Test Model tr = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% IPEAK I Figure 5b. IEC 1000-4-2 ESD Generator Current Waveform Table 1. MAX3222E/MAX3237E/MAX3241E/ MAX3246E Shutdown and Enable Control Truth Table SHDN EN T_OUT R_OUT R_OUTB (MAX3237E/ MAX3241E) 0 0 High impedance Active Active 0 1 High impedance High impedance Active 1 0 Active Active Active 1 1 Active High impedance Active MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 12 ______________________________________________________________________________________ For the MAX3237E, all logic and RS-232 I/O pins are characterized for protection to ±15kV per the Human Body Model. ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 4a shows the Human Body Model, and Figure 4b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3222E/ MAX3232E/MAX3237E/MAX3241E/MAX3246E help you design equipment that meets level 4 (the highest level) of IEC 1000-4-2, without the need for additional ESDprotection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 5a shows the IEC 1000-4-2 model, and Figure 5b shows the current waveform for the ±8kV IEC 1000-4-2 level 4 ESD Contact Discharge test. The Air- Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just RS-232 inputs and outputs. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports. Table 2. Required Minimum Capacitor Values -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 0 1 2 3 4 5 6 7 8 9 10 MAX3222E-fig06a LOAD CURRENT PER TRANSMITTER (mA) TRANSMITTER OUTPUT VOLTAGE (V) VOUT+ VOUTVOUT+ VCC VOUTVCC = 3.0V Figure 6a. MAX3241E Transmitter Output Voltage vs. Load Table 3. Logic-Family Compatibility with Current Per Transmitter Various Supply Voltages VCC (V) C1 (μF) C2, C3, C4 (μF) MAX3222E/MAX3232E/MAX3241E 3.0 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.1 0.47 MAX3237E/MAX3246E 3.0 to 3.6 0.22 0.22 3.15 to 3.6 0.1 0.1 4.5 to 5.5 0.047 0.33 3.0 to 5.5 0.22 1.0 SYSTEM POWER-SUPPLY VOLTAGE (V) VCC SUPPLY VOLTAGE (V) COMPATIBILITY 3.3 3.3 Compatible with all CMOS families 5 5 Compatible with all TTL and CMOS families 5 3.3 C om p ati b l e w i th AC T and H C T C M OS , and w i th AC , H C , or C D 4000 C M O S MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 13 Applications Information Capacitor Selection The capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1μF capacitors for 3.3V operation. For other supply voltages, see Table 2 for required capacitor values. Do not use values smaller than those listed in Table 2. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1 without also increasing the values of C2, C3, C4, and CBYPASS to maintain the proper ratios (C1 to the other capacitors). When using the minimum required capacitor values, make sure the capacitor value does not degrade excessively with temperature. If in doubt, use capacitors with a larger nominal value. The capacitor’s equivalent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+ and V-. Power-Supply Decoupling In most circumstances, a 0.1μF VCC bypass capacitor is adequate. In applications sensitive to power-supply noise, use a capacitor of the same value as chargepump capacitor C1. Connect bypass capacitors as close to the IC as possible. Operation Down to 2.7V Transmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V. MAX3241E 23 EN 15 R5OUT 16 R4OUT 17 R3OUT 18 R2OUT 19 R1OUT 20 R2OUTB 21 R1OUTB 5kΩ 5kΩ 5kΩ 5kΩ 5kΩ R5IN 8 VCC R4IN 7 6 R2IN 5 R1IN 4 SHDN 22 GND 25 12 T3IN 13 T2IN 14 T1IN 2 C2- 1 C2+ 24 C1- 28 C1+ T3OUT 11 +V COMPUTER SERIAL PORT +V -V GND Tx T2OUT 10 T1OUT 9 V- 3 V+ VCC 27 VCC C4 C1 C3 C2 CBYPASS VCC = +3.0V TO +5.5V 26 R3IN MOUSE Figure 6b. Mouse Driver Test Circuit MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 14 ______________________________________________________________________________________ Figure 7. Loopback Test Circuit 2μs/div T1IN T1OUT R1OUT 5V/div 5V/div V 5V/div CC = 3.3V C1–C4 = 0.1μF Figure 8. MAX3241E Loopback Test Result at 120kbps 2μs/div T1IN T1OUT R1OUT 5V/div 5V/div 5V/div VCC = 3.3V, C1–C4 = 0.1μF Figure 9. MAX3241E Loopback Test Result at 250kbps +5V 0 +5V 0 -5V +5V 0 T_IN T_OUT 5kΩ + 250pF R_OUT 400ns/div VCC = 3.3V C1–C4 = 0.1μF Figure 10. MAX3237E Loopback Test Result at 1000kbps (MBAUD = VCC) MAX3222E MAX3232E MAX3237E MAX3241E MAX3246E 5kΩ R_ OUT R_ IN C2- C2+ C1- C1+ VV+ VCC C4 C1 C3 C2 0.1μF VCC T_ IN T_ OUT GND 1000pF Transmitter Outputs Recovering from Shutdown Figure 3 shows two transmitter outputs recovering from shutdown mode. As they become active, the two transmitter outputs are shown going to opposite RS-232 levels (one transmitter input is high; the other is low). Each transmitter is loaded with 3kΩ in parallel with 2500pF. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown. Note that the transmitters are enabled only when the magnitude of V- exceeds approximately -3.0V. Mouse Drivability The MAX3241E is designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manufacturers such as Microsoft and Logitech. The MAX3241E successfully drove all serial mice tested and met their current and voltage requirements. MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 15 Figure 6a shows the transmitter output voltages under increasing load current at +3.0V. Figure 6b shows a typical mouse connection using the MAX3241E. High Data Rates The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E maintain the RS-232 ±5V minimum transmitter output voltage even at high data rates. Figure 7 shows a transmitter loopback test circuit. Figure 8 shows a loopback test result at 120kbps, and Figure 9 shows the same test at 250kbps. For Figure 8, all transmitters were driven simultaneously at 120kbps into RS- 232 loads in parallel with 1000pF. For Figure 9, a single transmitter was driven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF. The MAX3237E maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps. Figure 10 shows a loopback test result at 1Mbps with MBAUD = VCC. For Figure 10, all transmitters were loaded with an RS-232 receiver in parallel with 250pF. Interconnection with 3V and 5V Logic The MAX3222E/MAX3232E/MAX3237E/MAX3241E/ MAX3246E can directly interface with various 5V logic families, including ACT and HCT CMOS. See Table 3 for more information on possible combinations of interconnections. UCSP Reliability The UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a UCSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as the wafer-fabrication process primarily determines it. Mechanical stress performance is a greater consideration for a UCSP package. UCSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Table 4 shows the testing done to characterize the UCSP reliability performance. In conclusion, the UCSP is capable of performing reliably through environmental stresses as indicated by the results in the table. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at www.maxim-ic.com. Table 4. Reliability Test Data TEST CONDITIONS DURATION FAILURES PER SAMPLE SIZE Temperature Cycle TA = -35°C to +85°C, TA = -40°C to +100°C 150 cycles, 900 cycles 0/10, 0/200 Operating Life TA = +70°C 240 hours 0/10 Moisture Resistance TA = +20°C to +60°C, 90% RH 240 hours 0/10 Low-Temperature Storage TA = -20°C 240 hours 0/10 Low-Temperature Operational TA = -10°C 24 hours 0/10 Solderability 8-hour steam age — 0/15 ESD ±15kV, Human Body Model — 0/5 High-Temperature Operating Life TJ = +150°C 168 hours 0/45 MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 16 ______________________________________________________________________________________ __________________________________________________________Pin Configurations 20 19 18 17 16 15 14 13 1 2 3 8 12 10 11 4 5 6 7 SHDN VCC GND C1- T1OUT V+ C1+ EN R1IN R1OUT T1IN T2IN T2OUT VC2- C2+ R2IN 9 R2OUT TSSOP/SSOP N.C. N.C. MAX3222E 20 19 18 17 16 15 14 13 1 2 3 8 12 10 11 4 5 6 7 N.C. VCC GND C1- T1OUT V+ C1+ N.C. R1IN R1OUT T2IN R2OUT T2OUT VC2- C2+ R2IN 9 N.C. TSSOP T1IN N.C. MAX3232E 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 VCC GND T1OUT C2+ R1IN C1- V+ C1+ MAX3232E R1OUT T1IN T2IN R2IN R2OUT T2OUT VC2- SO/DIP/SSOP/TSSOP 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C1+ V+ VCC GND C1- EN R5OUT SHDN R1OUTB R2OUTB R1OUT R2OUT R3OUT R4OUT T1IN T2IN T3IN T3OUT T2OUT T1OUT R5IN R4IN R3IN R2IN R1IN VC2- C2+ SSOP/SO/TSSOP QFN MAX3241E TOP VIEW 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 C1+ V+ VCC C1- T1IN T2IN MBAUD T3IN R1OUT R2OUT T4IN R3OUT T5IN R1OUTB SHDN EN T5OUT R3IN T4OUT R2IN R1IN T3OUT T2OUT T1OUT VC2- GND C2+ SSOP MAX3237E 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 SHDN VCC GND C1- T1OUT V+ C1+ EN R1IN R1OUT T1IN T2OUT T2IN VC2- C2+ R2IN 9 10 R2OUT SO/DIP MAX3222E 32 31 30 29 28 27 26 N.C. VC2- C2+ C1+ V+ VCC 25 N.C. 9 10 11 12 13 14 15 N.C. T3IN T2IN T1IN R5OUT R4OUT R3OUT N.C. 16 17 18 19 20 21 22 23 R2OUT R1OUT R2OUTB R1OUTB SHDN EN C1- 8 7 6 5 4 3 2 T3OUT T2OUT T1OUT R5IN R4IN R3IN R2IN MAX3241E R1IN 1 24 GND TOP VIEW MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 17 Pin Configurations (continued) 19 20 18 17 7 6 8 C1- C2- V- 9 C1+ R1IN N.C. T1IN T1OUT 1 2 SHDN 4 5 15 14 12 11 EN V+ EXPOSED PADDLE EXPOSED PADDLE N.C. R2OUT R2IN T2OUT MAX3222E C2+ R1OUT 3 13 VCC GND 16 10 T2IN TQFN TOP VIEW 15 16 14 13 6 5 7 C2+ V- 8 C1- R1IN T1IN T1OUT 1 2 VCC 4 12 11 9 V+ C1+ T2IN R2OUT R2IN T2OUT MAX3232E C2- R1OUT 3 10 GND TQFN TOP VIEW UCSP F2 F3 F4 F5 F6 E3 E6 D6 C6 B3 B6 A2 A3 A4 A5 A6 TOP VIEW (BUMPS ON BOTTOM) T1OUT VCC C1+ C1- GND R3IN R4OUT R5OUT R1IN R2IN R4IN R5IN T3OUT T2OUT B2: SHDN C2: R1OUT D2: T3IN E2: T2IN B3: EN E3: T1IN BUMPS B4, B5, C3, C4, C5, D3, D4, D5, E4, AND E5 NOT POPULATED E2 D2 C2 B2 F1 E1 D1 C1 B1 A1 V+ R3OUT R2OUT VC2- C2+ MAX3246E MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 18 ______________________________________________________________________________________ __________________________________________________Typical Operating Circuits 10 R2OUT 1 13 R1OUT R2IN 9 18 GND 16 RS-232 OUTPUTS TTL/CMOS INPUTS 11 T2IN 12 T1IN C2- 6 5 C2+ 4 C1- 2 C1+ R1IN 14 T2OUT 8 T1OUT 15 V- 7 V+ VCC 3 17 C1 0.1μF C2 0.1μF CBYPASS +3.3V RS-232 INPUTS TTL/CMOS OUTPUTS 5kΩ EN 5kΩ SHDN C3* 0.1μF C4 0.1μF NOTE: PIN NUMBERS REFER TO SO/DIP PACKAGES. MAX3222E PINOUT REFERS TO SO/DIP PACKAGES. MAX3232E PINOUT REFERS TO TSSOP/SSOP/SO/DIP/ PACKAGES *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. 9 R2OUT 12 R1OUT R2IN 8 GND 15 RS-232 OUTPUTS TTL/CMOS INPUTS 10 T2IN 11 T1IN C2- 5 4 C2+ 3 C1- 1 C1+ R1IN 13 T2OUT 7 T1OUT 14 V- 6 V+ VCC 2 C4 0.1μF 16 C1 0.1μF C2 0.1μF CBYPASS +3.3V RS-232 INPUTS TTL/CMOS OUTPUTS C3* 0.1μF 5kΩ 5kΩ SEE TABLE 2 FOR CAPACITOR SELECTION. MAX3222E MAX3232E MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 19 _____________________________________Typical Operating Circuits (continued) 23 EN 15 R5OUT 16 R4OUT 17 R3OUT 18 R2OUT 19 R1OUT 20 R2OUTB 21 R1OUTB TTL/CMOS OUTPUTS 5kΩ 5kΩ 5kΩ 5kΩ 5kΩ R5IN 8 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. R4IN 7 R3IN 6 R2IN 5 R1IN 4 RS-232 INPUTS SHDN 22 GND 25 RS-232 OUTPUTS TTL/CMOS INPUTS 12 T3IN 13 T2IN 14 T1IN C2- 2 1 C2+ 24 C1- 28 C1+ T3OUT 11 T2OUT 10 T1OUT 9 V- 3 V+ VCC 27 C4 0.1μF C3* 0.1μF C1 0.1μF C2 0.1μF 26 +3.3V CBYPASS MAX3241E 13 EN 18 R3OUT 20 R2OUT 21 R1OUT 16 R1OUTB LOGIC OUTPUTS 5kΩ 5kΩ 5kΩ R3IN 11 R2IN 9 R1IN 8 RS-232 INPUTS GND 2 RS-232 OUTPUTS LOGIC INPUTS 22 T3IN 23 T2IN 24 T1IN C2- 3 1 C2+ 25 C1- 28 C1+ T3OUT 7 T2OUT 6 T1OUT 5 T1 T2 T3 R1 R2 R3 V- 4 V+ VCC 27 0.1μF 0.1μF 0.1μF 0.1μF 26 MBAUD 15 17 T5IN 19 T4IN T5OUT 12 T4OUT 10 SHDN 14 T4 T5 C3* CBYPASS +3.3V MAX3237E MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 20 ______________________________________________________________________________________ _____________________________________Typical Operating Circuits (continued) B3 EN A3 R5OUT A2 R4OUT A1 R3OUT B1 R2OUT C2 R1OUT TTL/CMOS OUTPUTS 5kΩ 5kΩ 5kΩ 5kΩ 5kΩ R5IN C6 *C3 CAN BE RETURNED TO EITHER VCC OR GROUND. R4IN B6 R3IN A6 R2IN A5 R1IN A4 RS-232 INPUTS SHDN B2 GND F5 RS-232 OUTPUTS TTL/CMOS INPUTS D2 T3IN E2 T2IN E3 T1IN C2- D1 E1 C2+ F4 C1- F3 C1+ T3OUT D6 T2OUT E6 T1OUT F6 VC1 V+ VCC F1 C4 0.1μF C3* 0.1μF C1 0.1μF C2 0.1μF F2 +3.3V CBYPASS MAX3246E MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 21 Selector Guide PART NO. OF DRIVERS/ RECEIVERS LOW-POWER SHUTDOWN GUARANTEED DATA RATE (bps) MAX3222E 2/2 ✔ 250k MAX3232E 2/2 — 250k MAX3237E (Normal) 5/3 ✔ 250k MAX3237E (MegaBaud) 5/3 ✔ 1M MAX3241E 3/5 ✔ 250k MAX3246E 3/5 ✔ 250k ___________________Chip Information TRANSISTOR COUNT: MAX3222E/MAX3232E: 1129 MAX3237E: 2110 MAX3241E: 1335 MAX3246E: 842 PROCESS: BICMOS Ordering Information (continued) PART TEMP RANGE PINPACKAGE PKG CODE MAX3232ECTE 0°C to +70°C 16 Thin QFNEP** (5mm x 5mm) T1655-2 MAX3232ECUE 0°C to +70°C 16 TSSOP — MAX3232ECUP 0°C to +70°C 20 TSSOP — MAX3232EEAE -40°C to +85°C 16 SSOP — MAX3232EEWE -40°C to +85°C 16 Wide SO — MAX3232EEPE -40°C to +85°C 16 Plastic DIP — MAX3232EETE -40°C to +85°C 16 Thin QFNEP** (5mm x 5mm) T1655-2 MAX3232EEUE -40°C to +85°C 16 TSSOP — MAX3232EEUP -40°C to +85°C 20 TSSOP — MAX3237ECAI 0°C to +70°C 28 SSOP — MAX3237EEAI -40°C to +85°C 28 SSOP — MAX3241ECAI 0°C to +70°C 28 SSOP — MAX3241ECWI 0°C to +70°C 28 Wide SO — MAX3241ECUI 0°C to +70°C 28 TSSOP — MAX3241ECTJ 0°C to +70°C 32 Thin QFN — MAX3241EEAI -40°C to +85°C 28 SSOP — MAX3241EEWI -40°C to +85°C 28 Wide SO — MAX3241EEUI -40°C to +85°C 28 TSSOP — MAX3246ECBX-T 0°C to +70°C 6 x 6 UCSP† — MAX3246EEBX-T -40°C to +85°C 6 x 6 UCSP† — †Requires solder temperature profile described in the Absolute Maximum Ratings section. UCSP Reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this datasheet for more information. **EP = Exposed paddle. 24L QFN THIN.EPS PACKAGE OUTLINE, 21-0139 2 1 E 12, 16, 20, 24, 28L THIN QFN, 4x4x0.8mm PACKAGE OUTLINE, 21-0139 2 2 E 12, 16, 20, 24, 28L THIN QFN, 4x4x0.8mm Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 22 ______________________________________________________________________________________ MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 23 TSSOP4.40mm.EPS PACKAGE OUTLINE, TSSOP 4.40mm BODY 21-0066 1 1 I Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers 24 ______________________________________________________________________________________ 36L,UCSP.EPS 21-0082 1 1 K PACKAGE OUTLINE, 6x6 UCSP Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers ______________________________________________________________________________________ 25 SOICW.EPS PACKAGE OUTLINE, .300" SOIC 1 1 21-0042 B APPROVAL DOCUMENT CONTROL NO. REV. PROPRIETARY INFORMATION TITLE: TOP VIEW FRONT VIEW MAX 0.012 0.104 0.019 0.299 0.013 INCHES 0.291 0.009 E C DIM 0.014 0.004 B A1 MIN A 0.093 0.23 7.40 7.60 0.32 MILLIMETERS 0.10 0.35 2.35 MIN 0.49 0.30 MAX 2.65 L 0.016 0.050 0.40 1.27 D 0.496 0.512 D DIM MIN D INCHES MAX 12.60 13.00 MILLIMETERS MIN MAX 20 AC 0.447 0.463 11.35 11.75 18 AB 0.398 0.413 10.10 10.50 16 AA N MS013 SIDE VIEW H 0.394 0.419 10.00 10.65 e 0.050 1.27 D 0.598 0.614 15.20 15.60 24 AD D 0.697 0.713 17.70 18.10 28 AE E H N D e B A1 A 0∞-8∞ C L 1 VARIATIONS: Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SSOP.EPS PACKAGE OUTLINE, SSOP, 5.3 MM 1 1 21-0056 C APPROVAL DOCUMENT CONTROL NO. REV. PROPRIETARY INFORMATION TITLE: NOTES: 1. D&E DO NOT INCLUDE MOLD FLASH. 2. MOLD FLASH OR PROTRUSIONS NOT TO EXCEED .15 MM (.006"). 3. CONTROLLING DIMENSION: MILLIMETERS. 4. MEETS JEDEC MO150. 5. LEADS TO BE COPLANAR WITHIN 0.10 MM. H 7.90 L 0∞ 0.301 0.025 8∞ 0.311 0.037 0∞ 7.65 0.63 8∞ 0.95 MAX 5.38 MILLIMETERS B C D E e A1 DIM A SEE VARIATIONS 0.0256 BSC 0.010 0.004 0.205 0.002 0.015 0.008 0.212 0.008 INCHES MIN MAX 0.078 0.65 BSC 0.25 0.09 5.20 0.05 0.38 0.20 0.21 MIN 1.73 1.99 MILLIMETERS 6.07 6.07 10.07 8.07 7.07 INCHES D D D D D 0.239 0.239 0.397 0.317 0.278 MIN 0.249 0.249 0.407 0.328 0.289 MAX MIN 6.33 6.33 10.33 8.33 7.33 14L 16L 28L 24L 20L MAX N A D e A1 L C E H N 2 1 B 0.068 MAX3222E/MAX3232E/MAX3237E/MAX3241E†/MAX3246E ±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V, Up to 1Mbps, True RS-232 Transceivers Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 26 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) PDIPN.EPS Revision History Pages changed at Rev 10: 1–4, 9, 11, 21, 22, 26 PCB Keyswitches 4 - 23 4 RF RF short-travel keyswitches General data RF 15 (15 x 15 mm) and RF 19 (19 x 19 mm) with distinct key click, for use under an overlay or with RK 90 keycaps. Can be fully illuminated. Content RF 15 short-travel keyswitch 4 - 26 RF 15 short-travel keyswitch, non-illuminated 4 - 28 RF 15 short-travel keyswitch, fully illuminated with 2 LEDs 4 - 29 RF 15 short-travel keyswitch, 1 LED spot-illumination 4 - 30 RF 15 N short-travel keyswitch 4 - 32 RF 15 N short-travel keyswitch, non-illuminated 4 - 35 RF 15 R short-travel keyswitch 4 - 36 RF 15 R low short-travel keyswitch, non-illuminated 4 - 39 RF 15 R high short-travel keyswitch, non-illuminated 4 - 39 RF 15 R low short-travel keyswitch, 1 LED spot-illumination 4 - 40 RF 15 R high short-travel keyswitch, 1 LED spot-illumination 4 - 41 RF 15 H short-travel keyswitch 4 - 42 RF 15 H short-travel keyswitch, non-illuminated 4 - 44 RF 15 H short-travel keyswitch, fully illuminated 4 - 45 RF 15 signal indicator 4 - 46 RF 15 signal indicator, fully illuminated, 1 LED 4 - 48 RF 19 short-travel keyswitch 4 - 50 RF 19 short-travel keyswitch, non-illuminated 4 - 53 RF 19 short-travel keyswitch, fully illuminated with 2 LEDs 4 - 54 RF 19 short-travel keyswitch, 1 LED spot-illumination 4 - 55 RF 19 short-travel keyswitch, 1 NC + 1 NO 4 - 56 RF 19 short-travel keyswitch, non-illuminated 4 - 58 RF 19 H short-travel keyswitch 4 - 60 RF 19 H keyswitch, non-illuminated 4 - 62 RF 19 H short-travel keyswitch, fully illuminated 4 - 63 RF 19 signal indicator 4 - 64 RF 19 signal indicator, 1/2 x 1-module 4 - 66 RF 19 signal indicator, 1/2 x 2-module 4 - 66 RF 19 signal indicator, 1 x 1-module 4 - 67 RF 19 signal indicator, 1 x 2-module 4 - 67 4 - 24 PCB Keyswitches 4 RF RF short-travel keyswitches RF special accessories 4 - 68 Extension plunger for RF 15 N, round head 4 - 68 Extension plunger for RF 15 N, round head, with recess for LED 4 - 69 Keycap for RF 15, snap-on, for overall height 12.5 mm 4 - 69 Spacers, round 4 - 70 Spacers, triangular 4 - 71 LED spacer for RF 15 N 4 - 72 PCB Keyswitches 4 - 25 4 RF RF short-travel keyswitches Specifications LED 3 mm LED 2 mm LED Max. forward current lF: Current reduction from: T0 = 50 °C: Wavelength typ: Forward voltage UF/lF typ: Reverse voltage UR/lF typ: Ambient temperature, operating: (valid for 25 °C) 30 mA approx 0.5 mA/°C 635 nm 2 V/10 mA 5 V/100 μA min. - 20 °C . . . + 80 °C Red LED 30 mA approx 0.5 mA/°C 565 nm 2 V/10 mA 5 V/100 μA min. - 20 °C . . . + 80 °C Green LED 20 mA approx 0.2 mA/°C 586 nm 2 V/10 mA 5 V/100 μA min. - 20 °C . . . + 80 °C Yellow LED Max. forward current lF: Current reduction from: T0 = 50 °C: Wavelength typ: Forward voltage UF/lF typ: Reverse voltage UR/lF typ: Ambient temperature, operating: 20 mA approx 0.6 mA/°C 470 nm 2.7 V/10 mA 5V/100 μA min. - 20 °C . . . + 80 °C Blue LED 25 mA -- 3.6 V/20 mA - - 20 °C . . . + 80 °C White LED 30 mA - 510-545 nm 3.5 V/20 mA - -30 °C . . . + 100 °C Green LED superbright Max. forward current lF: Current reduction from: T0 = 50 °C: Light current fV/lF typ: Wavelength typ: Forward voltage UF/lF typ: Reverse voltage UR/lF typ: Ambient temperature, operating: (valid for 25 °C) 30 mA 0.5 mA/°C - 637 nm 1.8 V/20 mA 5 V/100 μA min. - 55 °C . . . + 100 °C Red LED 30 mA 0.5 mA/°C - 569 nm 2.1 V/10 mA 5 V/100 μA min. - 40 °C . . . + 100 °C Green LED 50 mA 0.8 mA/°C 250 mIm/20 mA 590 nm 1.9 V/20 mA 5 V/100 μA min. -40 °C . . . + 100 °C Yellow LED Max. forward current lF: Current reduction from: T0 = 50 °C: Light current fV/lF typ: Wavelength typ: Forward voltage UF/lF typ: Reverse voltage UR/lF typ: Ambient temperature, operating: 30 mA - - 464-485 nm 3.6 V/20 mA - 20 °C . . . + 80 °C Blue LED 30 mA approx 0.6 mA/°C - 635/565 nm 2 V/10 mA - - 20 °C . . . + 80 °C Multi-colour LED Rated power of series: PV = IF 2 x RV Calculating the series resistor: RV = Example for 5 Volt: RV = = 150 Ω (= standard value) UB - UF IF 5V - 2.0 V 0.02 A 4 - 26 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 short-travel keyswitch General data Low-profile keyboards with RF 15 components should be designed with a 19.05 mm grid. With this grid, frame webs remain free between the individual keys. The overlay can be glued onto these frame webs; we recommend area embossing over the keys for the overlays. Technical data General information Colour of lens see order block Recommended key grid 19.05 mm Dimensions Length 15 mm Width 15 mm Overall height 9.7 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination spot-/fully illuminated LED colour see order block LED type see order block Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 27 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 View on component side, all hole diameters 1,1 +/- 0,1 mm Operation characteristic limits RF Keyswitch, non-illuminated Keyswitch, fully illuminated Keyswitch, spot-illuminated Force/Travel Diagram – Keyswitch RF 15 Circuit Diagram – Keyswitch RF 15 Dimensional Drawing RF 15 Hole Pattern RF 15 Hole Pattern – Front Panel Stock items are marked by bold printed order numbers. 4 - 28 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 short-travel keyswitch, non-illuminated Contact materials Illumination Colour of lens LED colour LED type Order no. Ag not illuminated transparent 3.14.100.006/0000 Au not illuminated transparent 3.14.100.001/0000 Technical data see page 4 - 26 Accessories: Keycap for RF 15, snap-on, for overall height 12.5 mm: 5.46.654.059/0227 For keycaps, refer to chapter accessories and system RK 90. If exchangeable legends are required, or if an overall height of 12.5 mm is required, a keycap can be mounted on the non-illuminated keys. The keycap legend is visible through a window in the overlay. You can change the legend by replacing the keycap. Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 29 4 RF RF short-travel keyswitches RF 15 short-travel keyswitch, fully illuminated with 2 LEDs Illuminated area 10.8 x 10.8 mm Housing Actuator Lens Pict.: red Contact materials Illumination Colour of lens LED colour LED type Order no. Ag fully illuminated 2 LEDs red red 2 mm 3.14.200.021/0000 Ag fully illuminated 2 LEDs green green 2 mm 3.14.200.022/0000 Ag fully illuminated 2 LEDs yellow yellow 2 mm 3.14.200.023/0000 Ag fully illuminated 2 LEDs orange yellow 2 mm 3.14.200.024/0000 Ag fully illuminated 2 LEDs blue blue 2 mm 3.14.200.025/0000 Au fully illuminated 2 LEDs green green 2 mm 3.14.200.012/0000 Au fully illuminated 2 LEDs yellow yellow 2 mm 3.14.200.013/0000 Au fully illuminated 2 LEDs orange yellow 2 mm 3.14.200.014/0000 Au fully illuminated 2 LEDs blue blue 2 mm 3.14.200.015/0000 Technical data see page 4 - 26 For keycaps, refer to RK 90 system design. Technical data of LED see seperate page at the beginning of this chapter. Stock items are marked by bold printed order numbers. 4 - 30 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 short-travel keyswitch, 1 LED spot-illumination Pict.: red Contact materials Illumination Colour of lens LED colour LED type Order no. Ag spot illumination 1 LED opaque white blue 3 mm 3.14.100.040/0000 Ag spot illumination 1 LED transparent red 3 mm 3.14.100.041/0000 Ag spot illumination 1 LED transparent green 3 mm 3.14.100.042/0000 Ag spot illumination 1 LED transparent yellow 3 mm 3.14.100.043/0000 Au spot illumination 1 LED opaque white blue 3 mm 3.14.100.030/0000 Au spot illumination 1 LED transparent red 3 mm 3.14.100.031/0000 Au spot illumination 1 LED transparent green 3 mm 3.14.100.032/0000 Au spot illumination 1 LED transparent yellow 3 mm 3.14.100.033/0000 Technical data see page 4 - 26 Double-spot LED illumination available on request Technical data of LED see seperate page at the beginning of this chapter. 4 - 32 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 N short-travel keyswitch General data The RF 15N keyswitch provides a minimum overall height of 6.2 mm. The overall height can be varied by extension plungers which are inserted into the cross-like notches on the actuator tops. LEDs can only be arranged separately next to the keyswitches up to an overall height of 10 mm (i.e. without plunger or with small plunger). Keyswitches with overall heights of 12 mm or more can be provided with a maximum of 2 LEDs which are inserted into the recesses of the keyswitch housing. LEDs of keyswitches with overall heights of 12.5 mm or more should be placed onto LED spacers in order to obtain satisfactory illumination. Technical data General information Colour of lens see order block Recommended key grid 19.05 mm Dimensions Length 15 mm Width 15 mm Overall height 6.2 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination external 3 mm LED possible if height ‹ 12 mm Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 33 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 Operation characteristic limits RF Keyswitch, non illuminated Keyswitch, spot-illuminated Force/Travel Diagram – Keyswitch RF 15 N Circuit Diagram – Keyswitch RF 15 N Dimensional Drawings RF 15 N 4 - 34 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 N without plunger RF 15 N with plunger ø 10 mm, non-illuminated RF 15 N with plunger ø 10 mm, illuminated RF 15 N with plunger ø 15 mm, illuminated View on component side All hole diameters 1,1 +/- 0,1 mm PCB layout Keyswitch 1/400” grid Hole Pattern RF 15 N Hole Patterns – Front Panel RF 15 N Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 35 4 RF Description Photo Order no. Page Accessories RF 15 N short-travel keyswitch LED yellow, 3mm 1.90.690.103/0000 5 - 20 LED spacer for RF 15 N, Ø 5 mm, spacing length 2.2 mm, light grey, for use with overall height of 12.5 mm 5.30.109.010/0756 Extension plunger for RF 15 N, Ø 10 mm, overall height 22.5 mm 5.46.011.028/0710 Extension plunger for RF 15 N, Ø 15 mm, overall height 22.5 mm 5.46.017.028/0710 RF 15 N short-travel keyswitch, non-illuminated Contact materials Illumination Recommended key grid Overall height Order no. Au external 3 mm LED possible if height < 12 mm 19.05 mm 6.2 mm 3.14.100.601/0000 Ag external 3 mm LED possible if height < 12 mm 19.05 mm 6.2 mm 3.14.100.606/0000 Technical data see page 4 - 32 For keycaps, refer to RK 90 system design. Double-spot LED illumination available on request. 4 - 36 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 R short-travel keyswitch with 3 mm LED, green Pict.: with 2 mm LED, red General data The round actuator of the RF 15 R keyswitch requires round front panel cut-outs. These make it possible to use a narrow keyboard grid of only 15.24 mm with sufficiently large frame webs between the individual keys. We recommend area embossing over the actuators for the overlay. Technical data General information Recommended key grid 15.24 mm Dimensions Length 15 mm Width 15 mm Overall height 9,7/12,5 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination spot illumination LED colour see order block LED type see order block Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 37 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 View on component side All hole diameters 1,1 +/- 0,1 mm PCB layout Keyswitch 1/400” grid Operation characteristic limits RF Keyswitch, non-illuminated Keyswitch, spot-illuminated Force/Travel Diagram – Keyswitch RF 15 R Circuit Diagram – Keyswitch RF 15 R Dimensional Drawing RF 15 R Hole Pattern RF 15 R 4 - 38 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 R, non-illuminated RF 15 R, illuminated Hole Pattern – Front Panel RF 15 R Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 39 4 RF RF short-travel keyswitches RF 15 R low short-travel keyswitch, non-illuminated Contact materials Overall height Illumination LED type LED colour Order no. Au 9.7 mm not illuminated 3.14.100.501/0000 Ag 9.7 mm not illuminated 3.14.100.506/0000 Technical data see page 4 - 36 RF 15 R high short-travel keyswitch, non-illuminated Contact materials Overall height Illumination LED type LED colour Order no. Au 12.5 mm not illuminated 3.14.100.801/0000 Ag 12.5 mm not illuminated 3.14.100.806/0000 Technical data see page 4 - 36 Stock items are marked by bold printed order numbers. 4 - 40 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 R low short-travel keyswitch, 1 LED spot-illumination Pict.: with 2 mm LED, red Contact materials Overall height Illumination LED type LED colour Order no. Au 9.7 mm spot illumination 1 LED 2 mm red 3.14.100.531/0000 Au 9.7 mm spot illumination 1 LED 2 mm green 3.14.100.532/0000 Au 9.7 mm spot illumination 1 LED 2 mm yellow 3.14.100.533/0000 Ag 9.7 mm spot illumination 1 LED 2 mm red 3.14.100.541/0000 Ag 9.7 mm spot illumination 1 LED 2 mm green 3.14.100.542/0000 Ag 9.7 mm spot illumination 1 LED 2 mm yellow 3.14.100.543/0000 Technical data see page 4 - 36 Versions with 2 LEDs available on request. Technical data of LED see seperate page at the beginning of this chapter. Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 41 4 RF RF short-travel keyswitches RF 15 R high short-travel keyswitch, 1 LED spot-illumination Pict.: with 3 mm LED, green Contact materials Overall height Illumination LED type LED colour Order no. Au 12.5 mm spot illumination 1 LED 3 mm blue 3.14.100.830/0000 Au 12.5 mm spot illumination 1 LED 3 mm red 3.14.100.831/0000 Au 12.5 mm spot illumination 1 LED 3 mm green 3.14.100.832/0000 Au 12.5 mm spot illumination 1 LED 3 mm yellow 3.14.100.833/0000 Ag 12.5 mm spot illumination 1 LED 3 mm blue 3.14.100.840/0000 Ag 12.5 mm spot illumination 1 LED 3 mm red 3.14.100.841/0000 Ag 12.5 mm spot illumination 1 LED 3 mm green 3.14.100.842/0000 Ag 12.5 mm spot illumination 1 LED 3 mm yellow 3.14.100.843/0000 Technical data see page 4 - 36 Versions with 2 LEDs available on request. Technical data of LED see seperate page at the beginning of the chapter. 4 - 42 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 H short-travel keyswitch yellow General data Application notes: The RF 15 H key has an overall height of 12.5 mm and can be fully illuminated. When designing membrane keyboards, we recommend using a key grid of at least 19.05 mm and a 0.13 mm overlay with area embossing over the keys. You can use the O-ring (accessory) to block the key and use it as an indicator field or blank spaceholder. Technical data General information Colour of lens see order block Recommended key grid 20 mm Dimensions Length 15 mm Width 15 mm Overall height 12.5 mm Mechanical design Mounting soldering into PCB Terminals see order block Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination not illuminated / fully illuminated LED colour see order block LED type see order block Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 43 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 No metal webs with 15.24 mm. View on component side. All hole diameters 1,1 +/- 0,1 mm. PCB layout Keyswitch 1/400” grid. Operation characteristic limits RF Keyswitch, non-illuminated Keyswitch, fully illuminated Force/Travel Diagram – Keyswitch RF 15 H Circuit Diagram – Keyswitch RF 15 H Dimensional Drawing Hole Pattern Hole Pattern – Front Panel Stock items are marked by bold printed order numbers. 4 - 44 PCB Keyswitches 4 RF RF short-travel keyswitches Description Photo Order no. Page Accessories RF 15 H short-travel keyswitch O-ring, black, for blocking the operating stroke 5.30.120.009/0100 5 - 27 RF 15 H short-travel keyswitch, non-illuminated overall height housing actuator lens illuminated area Contact materials Illumination Colour of lens LED colour LED type Order no. Au not illuminated white 3.14.100.702/0000 Ag not illuminated white 3.14.100.707/0000 Technical data see page 4 - 42 Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 45 4 RF RF short-travel keyswitches RF 15 H short-travel keyswitch, fully illuminated overall height housing actuator lens illuminated area Pict.: yellow Contact materials Illumination Colour of lens LED colour LED type Order no. Au fully illuminated 2 LEDs red red 2 mm 3.14.200.731/0000 Au fully illuminated 2 LEDs green green 2 mm 3.14.200.732/0000 Au fully illuminated 1 LED green green super bright 3 mm 3.14.200.736/0000 Au fully illuminated 2 LEDs yellow yellow 2 mm 3.14.200.733/0000 Au fully illuminated 1 LED white white 3 mm 3.14.200.735/0000 Au fully illuminated 2 LEDs orange yellow 2 mm 3.14.200.738/0000 Au fully illuminated 1 LED blue blue 3 mm 3.14.200.739/0000 Au fully illuminated 2 LEDs white multi colour 3 mm 3.14.100.734/0000 Ag fully illuminated 2 LEDs red red 2 mm 3.14.200.741/0000 Ag fully illuminated 2 LEDs green green 2 mm 3.14.200.742/0000 Ag fully illuminated 1 LED green green super bright 3 mm 3.14.200.746/0000 Ag fully illuminated 2 LEDs yellow yellow 2 mm 3.14.200.743/0000 Ag fully illuminated 1 LED white white 3 mm 3.14.200.745/0000 Ag fully illuminated 2 LEDs orange yellow 2 mm 3.14.200.748/0000 Ag fully illuminated 1 LED blue blue 3 mm 3.14.200.749/0000 Ag fully illuminated 2 LEDs white multi colour 3 mm 3.14.100.744/0000 Technical data see page 4 - 42 When using the keyswitches with multicolour LEDs the illumination colour can be varied from red to green by change of polarity. Due to the frequency of the polarity-changes the colours red, green, yellow as well as all secondary colours from these are possible. Technical data of LED see seperate page of the beginning of this chapter. 4 - 46 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 signal indicator Pict.: green Technical data General information Colour of lens see order block Recommended key grid 19.05 mm Dimensions Length 15 mm Width 15 mm Overall height 9.7 mm Mechanical design Mounting soldering into PCB Illumination fully illuminated 1 LED LED colour see order block LED type 2 mm Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 47 4 RF Dimensional Drawing Signal Indicator RF 15 Hole Pattern Hole Pattern – Front Panel No metal webs with 15.24 mm. View on component side. All hole diameters 1,1 +/- 0,1 mm. RF short-travel keyswitches Stock items are marked by bold printed order numbers. 4 - 48 PCB Keyswitches 4 RF RF short-travel keyswitches RF 15 signal indicator, fully illuminated, 1 LED Pict.: green Overall height Illumination Colour of lens LED colour LED type Order no. 9.7 mm fully illuminated 1 LED red red 2 mm 3.14.200.051/0000 9.7 mm fully illuminated 1 LED green green 2 mm 3.14.200.052/0000 9.7 mm fully illuminated 1 LED yellow yellow 2 mm 3.14.200.053/0000 9.7 mm fully illuminated 1 LED orange yellow 2 mm 3.14.200.054/0000 9.7 mm fully illuminated 1 LED blue blue 2 mm 3.14.200.055/0000 Technical data see page 4 - 46 For more information, see LEDs. Technical data of LED see seperate page of the beginning of this chapter. 4 - 50 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch General data Application notes: RF 19 keys offer a large actuation area. When designing low-profile keyboards with a grid of >= 23 mm, frame webs remain free between the individual keys. The overlay can be glued onto these frame webs; we recommend area embossing over the keys for the overlay. Technical data General information Colour of lens see order block Recommended key grid 23 mm Dimensions Length 19.05 mm Width 19.05 mm Overall height 9.7 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination spot-/fully illuminated LED colour see order block LED type see order block Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 51 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 Operation characteristic limits RF Keyswitch, non-illuminated Keyswitch, fully illuminated Keyswitch, spot-illuminated Force/Travel Diagram – Keyswitch RF 19 Circuit Diagram – Keyswitch RF 19 Dimensional Drawing 4 - 52 PCB Keyswitches 4 RF RF short-travel keyswitches * The LED may be positioned either on the left-hand or right-hand side. Standard version: LED on left-hand side View on component side, all hole diameters 1,1 +/- 0,1 mm Hole Patterns RF 19 Hole Patterns – Front Panel RF 19 Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 53 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch, non-illuminated Contact materials Illumination Colour of lens LED colour LED type Order no. Au not illuminated transparent 3.14.001.001/0000 Ag not illuminated transparent 3.14.001.006/0000 Technical data see page 4 - 50 Stock items are marked by bold printed order numbers. 4 - 54 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch, fully illuminated with 2 LEDs Contact materials Illumination Colour of lens LED colour LED type Order no. Au fully illuminated 2 LEDs red red 2 mm 3.14.002.011/0000 Au fully illuminated 2 LEDs green green 2 mm 3.14.002.012/0000 Au fully illuminated 2 LEDs yellow yellow 2 mm 3.14.002.013/0000 Au fully illuminated 2 LEDs orange yellow 2 mm 3.14.002.014/0000 Au fully illuminated 2 LEDs blue blue 2 mm 3.14.002.015/0000 Ag fully illuminated 2 LEDs red red 2 mm 3.14.002.021/0000 Ag fully illuminated 2 LEDs green green 2 mm 3.14.002.022/0000 Ag fully illuminated 2 LEDs yellow yellow 2 mm 3.14.002.023/0000 Ag fully illuminated 2 LEDs orange yellow 2 mm 3.14.002.024/0000 Ag fully illuminated 2 LEDs blue blue 2 mm 3.14.002.025/0000 Technical data see page 4 - 50 Technical data of LED see seperate page of the beginning of this chapter. Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 55 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch, 1 LED spot-illumination Pict.: red Contact materials Illumination Colour of lens LED colour LED type Order no. Au spot illumination 1 LED opaque white blue 3 mm 3.14.001.030/0000 Au spot illumination 1 LED transparent red 3 mm 3.14.001.031/0000 Au spot illumination 1 LED transparent green 3 mm 3.14.001.032/0000 Au spot illumination 1 LED transparent yellow 3 mm 3.14.001.033/0000 Ag spot illumination 1 LED opaque white blue 3 mm 3.14.001.040/0000 Ag spot illumination 1 LED transparent red 3 mm 3.14.001.041/0000 Ag spot illumination 1 LED transparent green 3 mm 3.14.001.042/0000 Ag spot illumination 1 LED transparent yellow 3 mm 3.14.001.043/0000 Technical data see page 4 - 50 Versions with 2 LEDs available on request. Technical data of LED see seperate page of the beginning of this chapter. 4 - 56 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch, 1 NC + 1 NO Technical data General information Recommended key grid 23 mm Dimensions Length 19.05 mm Width 19.05 mm Overall height 9.7 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system bridge contact Contact arrangement 1 NC + 1 NO Contact materials Au/Ag Illumination none Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0,02 V, Ag: 3 V V Rated voltage max. Au: 42 V, Ag: 50 V V Rated current min. Au: 0,01 mA, Ag: 0,1 mA mA Rated current max. Au: 100 mA, Ag: 250 mA mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 2 x 106 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 100000 Soldering time max. 5 sec. Soldering temperature max. 265 °C Flammability of materials UL 94 HB For keycaps, refer to RK 90. PCB Keyswitches 4 - 57 4 RF RF short-travel keyswitches Dimensional Drawing Hole Pattern Hole Pattern – Front Panel Circuit Diagram view on component side Stock items are marked by bold printed order numbers. 4 - 58 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 short-travel keyswitch, non-illuminated Contact materials Contact arrangement Illumination Colour of lens Order no. Au 1 NC + 1 NO not illuminated opaque white 1.16.000.991/0000 Ag 1 NC + 1 NO not illuminated opaque white 1.16.000.990/0000 Technical data see page 4 - 56 4 - 60 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 H short-travel keyswitch General data Application notes: The RF 19H key has an overall height of 12.5 mm and can be fully illuminated. When designing membrane keyboards, we recommend using a key grid of at least 23 mm and a 0.13 mm overlay with area embossing over the keys. You can use the O-ring (accessory) to block the key and use it as an indicator field or blank spaceholder. Technical data General information Colour of lens see order block Recommended key grid 24 mm Dimensions Length 19.05 mm Width 19.05 mm Overall height 12.5 mm Mechanical design Mounting soldering into PCB Terminals contacts tin-plated, fix contact Ag plated Contact system snap-action contact Contact arrangement 1 NO Contact materials Au/Ag Illumination spot-/fully illuminated LED colour see order block LED type see order block Mechanical characteristics Operating force max. 2 ... 3 N Operating travel 0.5 mm Switching travel 0.5 mm Robustness min. with through-plated PCB 100 N Electrical characteristics Rated voltage min. Au: 0.02 V, Ag: 3 V Rated voltage max. Au: 42 V, Ag: 50 V Rated current min. Au: 0,01 mA, Ag: 0,1 mA Rated current max. Au: 100 mA, Ag: 250 mA Rated power max. (ohmic load) Au: 2 W, Ag: 12.5 W Contact resistance when new max. 100 mΩ Contact resistance acc. to life max. 3 Ω Insulation resistance 109 Ω ESD strength (underneath overlay) 15 kV Bouncing time max. 5 ms Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Operating life min. 1,000,000 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 61 4 RF RF short-travel keyswitches F 1 = Max. operating force F 2 = Force at contact F 2 is max. 55% of F 1 Operation characteristic limits RF Keyswitch, non illuminated Keyswitch, fully illuminated Force/Travel Diagram – Keyswitch RF 19 H Circuit Diagram – Keyswitch RF 19 H Dimensional Drawing 4 - 62 PCB Keyswitches 4 RF Stock items are marked by bold printed order numbers. RF short-travel keyswitches Description Photo Order no. Page Accessories RF 19 H short-travel keyswitch O-ring, black, 17.0 x 1.5, for blocking RF 19H keys 5.30.125.003/0100 5 - 27 RF 19 H keyswitch, non-illuminated Contact materials Illumination Colour of lens LED colour LED type Order no. Au not illuminated white 3.14.001.501/0000 Ag not illuminated white 3.14.001.506/0000 Technical data see page 4 - 60 * The LED may be positioned either on the left-hand or right-hand side. Standard version: LED on left-hand side View on component side, all hole diameters 1,1 +/- 0,1 mm Hole Pattern RF 19 H Hole Pattern – Front Panel RF 19 H LED Keyswitch not illuminated Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 63 4 RF RF short-travel keyswitches RF 19 H short-travel keyswitch, fully illuminated Contact materials Illumination Colour of lens LED colour LED type Order no. Au fully illuminated 2 LEDs red red 2 mm 3.14.002.613/0000 Au fully illuminated 2 LEDs green green 2 mm 3.14.002.632/0000 Au fully illuminated 1 LED green green super bright 3 mm 3.14.002.633/0000 Au fully illuminated 2 LEDs yellow yellow 2 mm 3.14.002.653/0000 Au fully illuminated 1 LED white white 3 mm 3.14.002.684/0000 Au fully illuminated 2 LEDs orange yellow 2 mm 3.14.002.673/0000 Au fully illuminated 2 LEDs white multi colour 3 mm 3.14.001.672/0000 Au fully illuminated 1 LED blue blue 3 mm 3.14.002.683/0000 Ag fully illuminated 2 LEDs red red 2 mm 3.14.002.623/0000 Ag fully illuminated 2 LEDs green green 2 mm 3.14.002.642/0000 Ag fully illuminated 1 LED green green super bright 3 mm 3.14.002.643/0000 Ag fully illuminated 1 LED blue blue super bright 3 mm 3.14.002.688/0000 Ag fully illuminated 2 LEDs yellow yellow 2 mm 3.14.002.663/0000 Ag fully illuminated 1 LED white white 3 mm 3.14.002.689/0000 Ag fully illuminated 2 LEDs orange yellow 2 mm 3.14.002.678/0000 Ag fully illuminated 2 LEDs white multi colour 3 mm 3.14.001.682/0000 Technical data see page 4 - 60 When using the keyswitches with multicolour LEDs the illumination colour can be varied from red to green by change of polarity. Due to the frequency of the polarity-changes the colours red, green, yellow as well as all secondary colours from these are possible. Technical data of LED see seperate page of the beginning of this chapter. 4 - 64 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 signal indicator 1 x 2-module 0.5 x 2-module 1 x 1-module Pict.: 0.5 x 1-module Technical data General information Colour of lens see order block Recommended key grid 23/x mm Dimensions Length see order block Width see order block Overall height 9.15 mm Mechanical design Mounting soldering into PCB Illumination see order block LED colour see order block LED type see order block Other specifications Ambient temp. operating min. -25 °C Ambient temp. operating max. +70 °C Storage temperature min. -40 °C Storage temperature max. (product) +80 °C Storage temperature max. (in tube) +50 °C Resistance to constant environment according to IEC 600 68-2-3 and 2-30 Resistance at variable environment according to IEC 600 68-2-14 and 2-33 Soldering time max. 2,5 sec. Soldering temperature max. 250 °C Flammability of materials UL 94 HB PCB Keyswitches 4 - 65 4 RF RF short-travel keyswitches * The LED may be positioned either on the left-hand or right-hand side. Standard verstion: LED on left-hand side View on component side, all hole diameters 1,1 +/- 0,1 mm Front panel cut-out = outer keyswitch size + 1 mm Dimensional Drawing Signal Indicator RF 19 Hole Patterns RF 19 Stock items are marked by bold printed order numbers. 4 - 66 PCB Keyswitches 4 RF RF short-travel keyswitches RF 19 signal indicator, 1/2 x 1-module Housing Lens Illuminated area 16.4 x 7.8 mm Pict.: 0,5 x 1-module, yellow Illumination Colour of lens LED colour LED type Order no. fully illuminated 1 LED red red 2 mm 3.14.002.061/0000 fully illuminated 1 LED green green 2 mm 3.14.002.062/0000 fully illuminated 1 LED yellow yellow 2 mm 3.14.002.063/0000 fully illuminated 1 LED orange yellow 2 mm 3.14.002.064/0000 Technical data see page 4 - 64 For more information, see LEDs. RF 19 signal indicator, 1/2 x 2-module Pict.: 0,5 x 2-module, yellow Illumination Colour of lens LED colour LED type Order no. fully illuminated 3 LEDs red red 2 mm 3.14.002.908/0000 fully illuminated 3 LEDs green green 2 mm 3.14.002.909/0000 fully illuminated 3 LEDs yellow yellow 2 mm 3.14.002.910/0000 fully illuminated 3 LEDs orange yellow 2 mm 3.14.002.911/0000 Technical data see page 4 - 64 For more information, see LEDs. Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 67 4 RF RF short-travel keyswitches RF 19 signal indicator, 1 x 1-module Pict.: 1 x 1-module, green Illumination Colour of lens LED colour LED type Order no. fully illuminated 2 LEDs red red 2 mm 3.14.002.051/0000 fully illuminated 2 LEDs green green 2 mm 3.14.002.052/0000 fully illuminated 2 LEDs yellow yellow 2 mm 3.14.002.053/0000 fully illuminated 2 LEDs orange yellow 2 mm 3.14.002.054/0000 fully illuminated 2 LEDs blue blue 2 mm 3.14.001.659/0000 Technical data see page 4 - 64 For more information, see LEDs. Suitable for RK 90 system design, illuminated for 2-module keycap. RF 19 signal indicator, 1 x 2-module Pict.: 1 x 2-module, red Illumination Colour of lens LED colour LED type Order no. fully illuminated 5 LEDs red red 2 mm 3.14.002.071/0000 fully illuminated 5 LEDs green green 2 mm 3.14.002.072/0000 fully illuminated 5 LEDs yellow yellow 2 mm 3.14.002.073/0000 fully illuminated 5 LEDs orange yellow 2 mm 3.14.002.074/0000 Technical data see page 4 - 64 For more information, see LEDs. Stock items are marked by bold printed order numbers. 4 - 68 PCB Keyswitches 4 RF RF short-travel keyswitches RF special accessories Pict.: light grey round and triangular versions Extension plunger for RF 15 N, round head Pict.: light grey Length Width Overall height Diameter Colour Order no. 9 mm 10 mm 5.46.011.036/0710 9.7 mm 10 mm 5.46.011.030/0710 12.5 mm 10 mm 5.46.011.037/0710 13 mm 10 mm 5.46.011.038/0710 22.5 mm 10 mm 5.46.011.028/0710 Length of plunger = Overall height - 4.25 mm. Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 69 4 RF RF short-travel keyswitches Extension plunger for RF 15 N, round head, with recess for LED Length Width Overall height Diameter Colour Order no. 9 mm 15 mm 5.46.017.036/0710 9.7 mm 15 mm 5.46.017.030/0710 12.5 mm 15 mm 5.46.017.037/0710 13 mm 15 mm 5.46.017.038/0710 22.5 mm 15 mm 5.46.017.028/0710 Keycap for RF 15, snap-on, for overall height 12.5 mm Length Width Overall height Diameter Colour Order no. 14.2 mm 14.2 mm 12.5 mm beige 5.46.654.059/0227 Stock items are marked by bold printed order numbers. 4 - 70 PCB Keyswitches 4 RF RF short-travel keyswitches Spacers, round Overlay Front panel Spacer PCB Length Width Overall height Diameter Colour Order no. 6.2 mm blue 5.30.759.251/0000 9.00 mm green 5.30.759.046/0000 3.50 mm blue transparent 5.30.759.023/0000 4 mm green 5.30.759.025/0000 4.25 mm blue 5.30.759.026/0000 4.50 mm red 5.30.759.027/0000 4.75 mm blue transparent 5.30.759.028/0000 5 mm black 5.30.759.029/0000 5.25 mm yellow orange transparent 5.30.759.030/0000 5.50 mm yellow 5.30.759.031/0000 5.75 mm green 5.30.759.032/0000 6 mm blue 5.30.759.033/0000 6.25 mm red 5.30.759.034/0000 6.50 mm blue transparent 5.30.759.035/0000 6.75 mm black 5.30.759.036/0000 7 mm yellow orange transparent 5.30.759.037/0000 7.25 mm yellow 5.30.759.038/0000 7.50 mm green 5.30.759.039/0000 7.75 mm blue 5.30.759.040/0000 8 mm red 5.30.759.041/0000 8.25 mm blue transparent 5.30.759.042/0000 10.00 mm black 5.30.759.043/0104 Stock items are marked by bold printed order numbers. PCB Keyswitches 4 - 71 4 RF RF short-travel keyswitches Spacers, triangular Countersink from height > 4 mm Overlay Front panel Spacer PCB Length Width Overall height Diameter Colour Order no. 6.2 mm blue 5.30.759.253/0000 2.50 mm blue 5.30.759.094/0000 2.75 mm red 5.30.759.095/0000 3 mm blue transparent 5.30.759.096/0000 3.25 mm black 5.30.759.097/0000 3.50 mm yellow orange transparent 5.30.759.098/0000 3.75 mm yellow 5.30.759.099/0000 4 mm green 5.30.759.100/0000 4.25 mm blue 5.30.759.101/0000 4.50 mm red 5.30.759.102/0000 4.75 mm blue transparent 5.30.759.103/0000 5 mm black 5.30.759.104/0000 5.25 mm yellow orange transparent 5.30.759.105/0000 5.50 mm yellow 5.30.759.106/0000 5.75 mm green 5.30.759.107/0000 6 mm blue 5.30.759.108/0000 6.25 mm red 5.30.759.109/0000 6.50 mm blue transparent 5.30.759.110/0000 6.75 mm black 5.30.759.111/0000 7 mm yellow orange transparent 5.30.759.112/0000 7.25 mm yellow 5.30.759.113/0000 7.50 mm green 5.30.759.114/0000 7.75 mm blue 5.30.759.115/0000 Stock items are marked by bold printed order numbers. 4 - 72 PCB Keyswitches 4 RF RF short-travel keyswitches Length Width Overall height Diameter Colour Order no. 8 mm red 5.30.759.116/0000 8.25 mm blue transparent 5.30.759.117/0000 10.00 mm black 5.30.759.124/0000 10.25 mm yellow orange transparent 5.30.759.125/0000 LED spacer for RF 15 N Pict.: light grey Length Characteristic 1 Width Overall height Order no. Characteristic 2 Diameter Colour 2.2 mm 12.5 mm 5 mm light grey 5.30.109.010/0756 12 mm 22.5 mm 5 mm black 5.30.109.019/0105 9 mm blue 5.30.759.254/0000 TL082 Wide Bandwidth Dual JFET Input Operational Amplifier General Description These devices are low cost, high speed, dual JFET input operational amplifiers with an internally trimmed input offset voltage (BI-FET II™ technology). They require low supply current yet maintain a large gain bandwidth product and fast slew rate. In addition, well matched high voltage JFET input devices provide very low input bias and offset currents. The TL082 is pin compatible with the standard LM1558 allowing designers to immediately upgrade the overall performance of existing LM1558 and most LM358 designs. These amplifiers may be used in applications such as high speed integrators, fast D/A converters, sample and hold circuits and many other circuits requiring low input offset voltage, low input bias current, high input impedance, high slew rate and wide bandwidth. The devices also exhibit low noise and offset voltage drift. Features n Internally trimmed offset voltage: 15 mV n Low input bias current: 50 pA n Low input noise voltage: 16nV/√Hz n Low input noise current: 0.01 pA/√Hz n Wide gain bandwidth: 4 MHz n High slew rate: 13 V/μs n Low supply current: 3.6 mA n High input impedance: 1012Ω n Low total harmonic distortion: ≤0.02% n Low 1/f noise corner: 50 Hz n Fast settling time to 0.01%: 2 μs Typical Connection 00835701 Connection Diagram DIP/SO Package (Top View) 00835703 Order Number TL082CM or TL082CP See NS Package Number M08A or N08E Simplified Schematic 00835702 BI-FET II™ is a trademark of National Semiconductor Corp. August 2000 TL082 Wide Bandwidth Dual JFET Input Operational Amplifier © 2004 National Semiconductor Corporation DS008357 www.national.com Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ±18V Power Dissipation (Note 2) Operating Temperature Range 0°C to +70°C Tj(MAX) 150°C Differential Input Voltage ±30V Input Voltage Range (Note 3) ±15V Output Short Circuit Duration Continuous Storage Temperature Range −65°C to +150°C Lead Temp. (Soldering, 10 seconds) 260°C ESD rating to be determined. Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. DC Electrical Characteristics (Note 5) Symbol Parameter Conditions TL082C Units Min Typ Max VOS Input Offset Voltage RS = 10 kΩ, TA = 25°C 5 15 mV Over Temperature 20 mV ΔVOS/ΔT Average TC of Input Offset RS = 10 kΩ 10 μV/°C Voltage IOS Input Offset Current Tj = 25°C, (Notes 5, 6) 25 200 pA Tj ≤ 70°C 4 nA IB Input Bias Current Tj = 25°C, (Notes 5, 6) 50 400 pA Tj ≤ 70°C 8 nA RIN Input Resistance Tj = 25°C 1012 Ω AVOL Large Signal Voltage Gain VS = ±15V, TA = 25°C 25 100 V/mV VO = ±10V, RL = 2 kΩ Over Temperature 15 V/mV VO Output Voltage Swing VS = ±15V, RL = 10 kΩ ±12 ±13.5 V VCM Input Common-Mode Voltage VS = ±15V ±11 +15 V Range −12 V CMRR Common-Mode Rejection Ratio RS ≤ 10 kΩ 70 100 dB PSRR Supply Voltage Rejection Ratio (Note 7) 70 100 dB IS Supply Current 3.6 5.6 mA TL082 www.national.com 2 AC Electrical Characteristics (Note 5) Symbol Parameter Conditions TL082C Units Min Typ Max Amplifier to Amplifier Coupling TA = 25°C, f = 1Hz- −120 dB 20 kHz (Input Referred) SR Slew Rate VS = ±15V, TA = 25°C 8 13 V/μs GBW Gain Bandwidth Product VS = ±15V, TA = 25°C 4 MHz en Equivalent Input Noise Voltage TA = 25°C, RS = 100Ω, 25 nV/√Hz f = 1000 Hz in Equivalent Input Noise Current Tj = 25°C, f = 1000 Hz 0.01 pA/√Hz THD Total Harmonic Distortion AV = +10, RL = 10k, VO = 20 Vp − p, BW = 20 Hz−20 kHz <0.02 % Note 2: For operating at elevated temperature, the device must be derated based on a thermal resistance of 115°C/W junction to ambient for the N package. Note 3: Unless otherwise specified the absolute maximum negative input voltage is equal to the negative power supply voltage. Note 4: The power dissipation limit, however, cannot be exceeded. Note 5: These specifications apply for VS = ±15V and 0°C ≤TA ≤ +70°C. VOS, IB and IOS are measured at VCM = 0. Note 6: The input bias currents are junction leakage currents which approximately double for every 10°C increase in the junction temperature, Tj. Due to the limited production test time, the input bias currents measured are correlated to junction temperature. In normal operation the junction temperature rises above the ambient temperature as a result of internal power dissipation, PD. Tj = TA + θjA PD where θjA is the thermal resistance from junction to ambient. Use of a heat sink is recommended if input bias current is to be kept to a minimum. Note 7: Supply voltage rejection ratio is measured for both supply magnitudes increasing or decreasing simultaneously in accordance with common practice. VS = ±6V to ±15V. Typical Performance Characteristics Input Bias Current Input Bias Current 00835718 00835719 TL082 3 www.national.com Typical Performance Characteristics (Continued) Supply Current Positive Common-Mode Input Voltage Limit 00835720 00835721 Negative Common-Mode Input Voltage Limit Positive Current Limit 00835722 00835723 Negative Current Limit Voltage Swing 00835724 00835725 TL082 www.national.com 4 Typical Performance Characteristics (Continued) Output Voltage Swing Gain Bandwidth 00835726 00835727 Bode Plot Slew Rate 00835728 00835729 Distortion vs Frequency Undistorted Output Voltage Swing 00835730 00835731 TL082 5 www.national.com Typical Performance Characteristics (Continued) Open Loop Frequency Response Common-Mode Rejection Ratio 00835732 00835733 Power Supply Rejection Ratio Equivalent Input Noise Voltage 00835734 00835735 Open Loop Voltage Gain (V/V) Output Impedance 00835736 00835737 TL082 www.national.com 6 Typical Performance Characteristics (Continued) Inverter Setting Time 00835738 Pulse Response Small Signal Inverting 00835706 Small Signal Non-Inverting 00835707 Large Signal Inverting 00835708 Large Signal Non-Inverting 00835709 TL082 7 www.national.com Pulse Response (Continued) Current Limit (RL = 100Ω) 00835710 Application Hints These devices are op amps with an internally trimmed input offset voltage and JFET input devices (BI-FET II). These JFETs have large reverse breakdown voltages from gate to source and drain eliminating the need for clamps across the inputs. Therefore, large differential input voltages can easily be accommodated without a large increase in input current. The maximum differential input voltage is independent of the supply voltages. However, neither of the input voltages should be allowed to exceed the negative supply as this will cause large currents to flow which can result in a destroyed unit. Exceeding the negative common-mode limit on either input will cause a reversal of the phase to the output and force the amplifier output to the corresponding high or low state. Exceeding the negative common-mode limit on both inputs will force the amplifier output to a high state. In neither case does a latch occur since raising the input back within the common-mode range again puts the input stage and thus the amplifier in a normal operating mode. Exceeding the positive common-mode limit on a single input will not change the phase of the output; however, if both inputs exceed the limit, the output of the amplifier will be forced to a high state. The amplifiers will operate with a common-mode input voltage equal to the positive supply; however, the gain bandwidth and slew rate may be decreased in this condition. When the negative common-mode voltage swings to within 3V of the negative supply, an increase in input offset voltage may occur. Each amplifier is individually biased by a zener reference which allows normal circuit operation on ±6V power supplies. Supply voltages less than these may result in lower gain bandwidth and slew rate. The amplifiers will drive a 2 kΩ load resistance to ±10V over the full temperature range of 0°C to +70°C. If the amplifier is forced to drive heavier load currents, however, an increase in input offset voltage may occur on the negative voltage swing and finally reach an active current limit on both positive and negative swings. Precautions should be taken to ensure that the power supply for the integrated circuit never becomes reversed in polarity or that the unit is not inadvertently installed backwards in a socket as an unlimited current surge through the resulting forward diode within the IC could cause fusing of the internal conductors and result in a destroyed unit. Because these amplifiers are JFET rather than MOSFET input op amps they do not require special handling. As with most amplifiers, care should be taken with lead dress, component placement and supply decoupling in order to ensure stability. For example, resistors from the output to an input should be placed with the body close to the input to minimize “pick-up” and maximize the frequency of the feedback pole by minimizing the capacitance from the input to ground. A feedback pole is created when the feedback around any amplifier is resistive. The parallel resistance and capacitance from the input of the device (usually the inverting input) to AC ground set the frequency of the pole. In many instances the frequency of this pole is much greater than the expected 3 dB frequency of the closed loop gain and consequently there is negligible effect on stability margin. However, if the feedback pole is less than approximately 6 times the expected 3 dB frequency a lead capacitor should be placed from the output to the input of the op amp. The value of the added capacitor should be such that the RC time constant of this capacitor and the resistance it parallels is greater than or equal to the original feedback pole time constant. TL082 www.national.com 8 Detailed Schematic 00835711 Typical Applications Three-Band Active Tone Control 00835712 TL082 9 www.national.com Typical Applications (Continued) 00835713 • All potentiometers are linear taper • Use the LF347 Quad for stereo applications Note 8: All controls flat. Note 9: Bass and treble boost, mid flat. Note 10: Bass and treble cut, mid flat. Note 11: Mid boost, bass and treble flat. Note 12: Mid cut, bass and treble flat. Improved CMRR Instrumentation Amplifier 00835714 C and are separate isolated grounds Matching of R2’s, R4’s and R5’s control CMRR With AVT = 1400, resistor matching = 0.01%: CMRR = 136 dB • Very high input impedance • Super high CMRR TL082 www.national.com 10 Typical Applications (Continued) Fourth Order Low Pass Butterworth Filter 00835715 Fourth Order High Pass Butterworth Filter 00835716 TL082 11 www.national.com Typical Applications (Continued) Ohms to Volts Converter 00835717 TL082 www.national.com 12 Physical Dimensions inches (millimeters) unless otherwise noted Order Number TL082CM NS Package M08A Order Number TL082CP NS Package N08E TL082 13 www.national.com Notes National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com TL082 Wide Bandwidth Dual JFET Input Operational Amplifier UDG-02157 VIN VOUT 5 13 12 16 15 1 2 3 4 6 11 7 8 14 10 9 + - KFF RT BP5 SGND VIN BPN10 SW BP10 SYNC ILIM TPS40060PWP SS/SD VFB COMP HDRV LDRV PGND 8 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER Check for Samples: TPS40060, TPS40061 1FEATURES APPLICATIONS 2• Operating Input Voltage 10 V to 55 V • Networking Equipment • Input Voltage Feed-Forward Compensation • Telecom Equipment • < 1% Internal 0.7-V Reference • Base Stations • Programmable Fixed-Frequency, Up to 1-MHz • Servers Voltage Mode Controller • Internal Gate Drive Outputs for High-Side P- DESCRIPTION Channel and Synchronous N-Channel The TPS40060 and TPS40061 are high-voltage, wide MOSFETs input (10 V to 55 V) synchronous, step-down • 16-Pin PowerPAD™ Package (θ converters. JC = 2°C/W) • Thermal Shutdown This family of devices offers design flexibility with a variety of user programmable functions, including; • Externally Synchronizable soft-start, UVLO, operating frequency, voltage feed- • Programmable High-Side Sense Short Circuit forward, high-side current limit, and loop Protection compensation. These devices are also • Programmable Closed-Loop Soft-Start synchronizable to an external supply. • TPS40060 Source Only/TPS40061 Source/Sink The TPS40060 and TPS40061 incorporate MOSFET gate drivers for external P-channel high-side and Nchannel synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction. SIMPLIFIED APPLICATION DIAGRAM 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. THERMAL PAD 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 KFF RT BP5 SYNC SGND SS/SD VFB COMP ILIM VIN HDRV BPN10 SW BP10 LDRV PGND PWP PACKAGE (1)(2) (TOP VIEW) TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION TA LOAD CURRENT PACKAGE(1) PART NUMBER SOURCE(2) Plastic HTSSOP (PWP) TPS40060PWP –40°C to 85°C SOURCE/SIN(2) Plastic HTSSOP (PWP) TPS40061PWP (1) The PWP package is also available taped and reeled. Add an R suffix to the device type (i.e., TPS40060PWPR). See the Application Information of the data sheet for PowerPAD drawing and layout information. (2) See Application Information section. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted(1) TPS40060 TPS40061 VIN 60 V VFB, SS/SD, SYNC –0.3 V to 6 V VIN Input voltage range SW –0.3 V to 60 V or VIN+5 V (whichever is less) SW. transient < 50 ns –2.5 V VOUT Output voltage range COMP, RT, KFF, SS –0.3 V to 6 V IIN Input current KFF 5 mA IOUT Output current RT 200 μA TJ Operating junction temperature range –40°C to 125°C Tstg Storage temperature –55°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C (1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS MIN NOM MAX UNIT VIN Input voltage 10 55 V TA Operating free-air temperature –40 85 °C (1) For more information on the PWP package, refer to TI Technical Brief (SLMA002). (2) PowerPAD™ heat slug must be connected to SGND (Pin 5), or electrically isolated from all other pins. 2 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 ELECTRICAL CHARACTERISTICS TA = –40°C to 85°C, VIN = 24 Vdc, RT = 165 kΩ, IKFF = 113 μA, fSW = 300 kHz, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VIN Input voltage range, VIN 10 55 V OPERATING CURRENT IDD Quiescent current Output drivers not switching 1.5 2.5 mA 5-V REFERENCE VBP5 Input voltage 4.5 5.0 5.5 V OSCILLATOR/RAMP GENERATOR(1) fOSC Frequency 270 300 330 kHz VRAMP PWM ramp voltage(2) 2 VIH High-level input voltage, SYNC 2 V VIL Low-level input voltage, SYNC 0.8 ISYNC Input current, SYNC 5 10 μA Pulse width, SYNC Pulse amplitude = 5 V 50 ns VRT RT voltage 2.32 2.50 2.68 V Maximum duty cycle VFB = 0 V, 100 kHz ≤ fSW≤ 1 MHz 85% 98% Minimum duty cycle VFB ≥ 0.75 V 0% VKFF Feed-forward voltage 3.35 3.50 3.65 V IKFF Feed-forward current operating range(2) 20 1100 μA SS/SD (SOFT START) ISS Soft-start source current 1.5 2.3 2.9 μA VSS Soft-start clamp voltage 3.1 3.7 4.0 V tDSCH Discharge time CSS = 220 pF 1.6 2.2 2.9 μs tSS Soft-start time CSS = 220 pF, 0 V ≤ VSS ≤ 1.6 V 120 155 235 SS/SD (SHUTDOWN) VSD Shutdown threshold voltage 90 130 160 VEN Device action threshold voltage 170 210 260 mV Hysteresis 80 10-V REFERENCE VBP10 Input voltage 9.0 9.7 10.7 V ERROR AMPLIFIER TA = 25°C 0.698 0.700 0.704 VFB Feedback regulation voltage 0°C ≤ TA ≤ 85°C 0.690 0.700 0.707 V 0.690 0.700 0.715 GBW Gain bandwidth 3 5 MHz AVOL Open loop gain 60 80 dB IOH High-level output source current VCOMP = 2.0 V, VFB = 0 V 1.5 4.0 mA IOL Low-level output sink current VCOMP = 2.0 V, VFB = 1 V 2.5 4.0 IBIAS Input bias current VFB = 0.7 V 100 300 nA VOH High-level output voltage IOH = 0.5 mA, VFB = 0 V 3.25 3.45 3.60 V VOL Low-level output voltage IOL = 0.5 mA, VFB = 1 V 0.050 0.215 0.350 (1) KFF current (IKFF) increases with SYNC frequency (fSYNC) and decreases with maximum duty cycle (DMAX). (2) Ensured by design. Not production tested. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) TA = –40°C to 85°C, VIN = 24 Vdc, RT = 165 kΩ, IKFF = 113 μA, fSW = 300 kHz, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT CURRENT LIMIT TA = 25°C 8.8 10.0 11.4 ISINK Current limit sink current 0°C ≤ TA ≤ 85°C 8.3 11.9 μA -40°C ≤ TA ≤ 0°C 7.5 11.5 VILIM = 23.7 V, VSW = (VILIM – 0.5 V) 330 500 tDELAY Propagation delay to output VILIM = 23.7 V, VSW = (VILIM – 2 V) 275 375 ns tON Switch leading-edge blanking pulse time(3) 100 tOFF Off time during a fault 7 cycles VOS Overcurrent comparator offset voltage -200 -60 50 mV OUTPUT DRIVER tHFALL High-side driver fall time(3) CHDRV = 2200 pF, (VIN – VBPN10) 48 96 tHRISE High-side driver rise time(3) CHDRV = 2200 pF, (VIN – VBPN10) 36 72 ns tLFALL Low-side driver fall time(3) CLDRV = 2200 pF, BP10 24 48 tLRISE Low-side driver rise time(3) CLDRV = 2200 pF, BP10 48 96 VOH High-level ouput voltage, HDRV IHDRV = 0.1 A , (VIN – VHDRV) 1.0 1.4 VOL Low-level ouput voltage, HDRV IHDRV = 0.1 A , (VHDRV – VBPN10) 0.75 V VOH High-level ouput voltage, LDRV ILDRV = 0.1 A, (VBP10 – VLDRV) 1.0 1.5 VOL Low-level ouput voltage, LDRV ILDRV = 0.1 A 0.5 Minimum controllable pulse width 100 150 ns BPN10 REGULATOR VBPN1 Output voltage Outputs off –7.5 –8.5 –9.5 V 0 RECTIFIER ZERO CURRENT COMPARATOR (TPS40060 ONLY) VSW Switch voltage LDRV output OFF –6 0 6 mV SW NODE ILEAK Leakage current(3) 1 μA THERMAL SHUTDOWN Shutdown temperature(3) 165 TSD °C Hysteresis(3) 25 UNDERVOLTAGE LOCKOUT VUVLO Undervoltage lockout threshold voltage, BP10 RKFF = 10 kΩ 6.25 6.5 7.5 Undervoltage lockout hysteresis 0.4 V VKFF KFF programmable threshold voltage RKFF = 82.5 kΩ 9 10 11 (3) Ensured by design. Not production tested. 4 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. 5-V reference. BP5 3 O This pin should be bypassed to ground with a 0.1-μF ceramic capacitor. This pin may be used with an external DC load of 1 mA or less. BP10 11 O 10-V reference used for gate drive of the N-channel synchronous rectifier. This pin should be bypassed by a 1-μF ceramic capacitor. This pin may be used with an external DC load of 1 mA or less. BPN10 13 O Negative 8-V reference with respect to VIN. This voltage is used to provide gate drive for the high side P-channel MOSFET. This pin should be bypassed to VIN with a 0.1-μF capacitor Output of the error amplifier, input to the PWM comparator. A feedback network is connected from this pin to the COMP 8 I VFB pin to compensate the overall loop. The comp pin is internally clamped above the peak of the ramp to improve large signal transient response. HDRV 14 O Floating gate drive for the high-side P-channel MOSFET. This pin switches from VIN (MOSFET off) to BPN10 (MOSFET on). Current limit pin, used to set the overcurrent threshold. An internal current sink from this pin to ground sets a ILIM 16 I voltage drop across an external resistor connected from this pin to VIN. The voltage on this pin is compared to the voltage drop (VIN -SW) across the high side MOSFET during conduction. KFF 1 I A resistor is connected from this pin to VIN to program the amount of voltage feed-forward. The current fed into this pin is internally divided and used to control the slope of the PWM ramp. LDRV 10 I Gate drive for the N-channel synchronous rectifier. This pin switches from BP10 (MOSFET on) to ground (MOSFET off). PGND 9 Power ground reference for the device. There should be a low-impedance connection from this point to the source of the power MOSFET. RT 2 I A resistor is connected from this pin to ground to set the internal oscillator ramp charging current and switching frequency. SGND 5 Signal ground reference for the device. Soft-start programming pin. A capacitor connected from this pin to ground programs the soft-start time. The capacitor is charged with an internal current source of 2.3 μA. The resulting voltage ramp on the SS pin is used as a second non-inverting input to the error amplifier. The output voltage begins to rise when VSS/SD is approximately SS/SD 6 I 0.85 V. The output continues to rise and reaches regulation when VSS/SD is approximately 1.55 V. The controller is considered shut down when VSS/SD is 125 mV or less. All internal circuitry is inactive. The internal circuitry is enabled when VSS/SD is 210 mV or greater. When VSS/SD is less than approximately 0.85 V, the outputs cease switching and the output voltage (VOUT) decays while the internal circuitry remains active. SW 12 I This pin is connected to the switched node of the converter and used for overcurrent sensing. This pin is used for zero current sensing in the TPS40060. SYNC 4 I Synchronization input for the device. This pin can be used to synchronize the oscillator to an external master frequency. VFB 7 I Inverting input to the error amplifier. In normal operation the voltage on this pin is equal to the internal reference voltage, 0.7 V. VIN 15 I Supply voltage for the device. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: TPS40060 TPS40061 1 2 7 + + 6 Ramp Generator Clock Oscillator 14 10 13 12 9 15 11 8 4 5 BP10 BP10 07VREF 7 7 16 3−bit up/down Fault Counter 7 7 7 07VREF 1V5REF 3V5REF Reference Voltages 7 Fault 7 Restart CLK 7 CLK BP5 7 3 BP5 7 7 Restart + 7 07VREF 7 7 Fault CL S Q R Q 7 CLK CL SW 7 SW S Q R Q 7 HDRV LDRV PGND BPN10 VIN BP10 SYNC RT KFF BP5 VFB SS/SD COMP ILIM SGND Zero Current Detector (TPS40060 Only) 10−V Regulator 7 1V5REF VIN 7 7 HDRV 7 HDRV 7 BPN10 7 + 0.85 V + N-Channel Driver P-Channel Driver UDG−02160 TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com SIMPLIFIED BLOCK DIAGRAM 6 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 UDG-02131 RAMP COMP SW VIN VIN SW COMP RAMP VPEAK VVALLEY T2 tON1 > tON2 and d1 > d2 t tON2 ON1 d  tON T T1 RT   1 fSW17.8210623 k TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 APPLICATION INFORMATION The TPS40060/61 family of parts allows the user to optimize the PWM controller to the specific application. The TPS40061 is the controller of choice for synchronous buck designs which will include most applications. It has two quadrant operation and will source or sink output current. This provides the best transient response. The TPS40060 operates in one quadrant and sources output current only, allowing for paralleling of converters and ensures that one converter does not sink current from another converter. This controller also emulates a standard buck converter at light loads where the inductor current goes discontinuous. At continuous output inductor currents the controller operates as a synchronous buck converter to optimize efficiency. SW NODE RESISTOR The SW node of the converter will be negative during the dead time when both the upper and lower MOSFETs are off. The magnitude of this negative voltage is dependent on the lower MOSFET body diode and the output current which flows during this dead time. This negative voltage could affect the operation of the controller, especially at low input voltages. Therefore, a 10-Ω resistor must be placed between the lower MOSFET drain and pin 12 (SW) of the controller as shown in Figure 14 as RSW. SETTING THE SWITCHING FREQUENCY (PROGRAMMING THE CLOCK OSCILLATOR) The TPS40060 and TPS40061 have independent clock oscillator and ramp generator circuits. The clock oscillator serves as the master clock to the ramp generator circuit. The switching frequency, fSW in kHz, of the clock oscillator is set by a single resistor (RT) to ground. The clock frequency is related to RT, in kΩ by Equation 1 and the relationship is charted in Figure 2. (1) PROGRAMMING THE RAMP GENERATOR CIRCUIT The ramp generator circuit provides the actual ramp used by the PWM comparator. The ramp generator provides voltage feed-forward control by varying the PWM ramp slope with line voltage, while maintaining a constant ramp magnitude. Varying the PWM ramp directly with line voltage provides excellent response to line variations since the PWM does not have to wait for loop delays before changing the duty cycle. (See Figure 1). Figure 1. Voltage Feed-Forward Effect on PWM Duty Cycle Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: TPS40060 TPS40061 RKFF  VIN (min)3.565.27RT1502 () 100 0 200 300 400 500 600 400 600 800 1000 700 200 800 FEED-FORWARD IMPEDANCE vs SWITCHING FREQUENCY RKFF - Feed-Forward Impedance - kW fSW - Switching Frequency - kHz VIN = 25 V VIN = 15 V VIN = 9 V RT - Timing Resistance - kW fSW - Switching Frequency - kHz TIMING RESISTANCE vs SWITCHING FREQUENCY 0 100 0 200 400 600 800 1000 200 300 400 500 600 RKFF  VIN (min)3.565.27RT1502 () TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com The PWM ramp must be faster than the master clock frequency or the PWM is prevented from starting. The PWM ramp time is programmed via a single resistor (RKFF) pulled up to VIN. RKFF is related to RT, and the minimum input voltage, VIN(min) through the following: where: • VIN is the desired start-up (UVLO) input voltage • RT is the timing resistor in kΩ (2) See the section on UVLO operation for further description. The curve showing the feedforward impedance required for a given switching frequency, fSW, at various input voltages is shown in Figure 3. For low input voltage and high duty cycle applications, the voltage feed-forward may limit the duty cycle prematurely. This does not occur for most applications. The voltage control loop controls the duty cycle and regulates the output voltages. For more information on large duty cycle operation, refer to Application Note (SLUA310). Figure 2. Figure 3. UVLO OPERATION The TPS40060 and TPS40061 use both fixed and variable (user programmable) UVLO protection. The fixed UVLO monitors the BP10 and BP5 bypass voltages. The UVLO circuit holds the soft-start low until the BP5 and BP10 voltage rails have exceeded their thresholds and the input voltage has exceed the user programmable undervoltage threshold. The TPS40060 and TPS40061 use the feed-forward pin, KFF, as a user programmable low-line UVLO detection. This variable low-line UVLO threshold compares the PWM ramp duration to the oscillator clock period. An undervoltage condition exists if the device receives a clock pulse before the ramp has reached 90% of its full amplitude. The ramp duration is a function of the ramp slope, which is directly related to the current into the KFF pin. The KFF current is a function of the input voltage and the resistance from KFF to the input voltage. The KFF resistor can be referenced to the oscillator frequency as described in Equation 3: 8 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 10 15 0.5 0 1.0 1.5 2.0 2.5 3.0 20 25 30 35 40 45 50 45 VUVLO - Output Voltage - V VUVLO - Undervoltage Lockout Threshold - V UNDERVOLTAGE LOCKOUT vs HYSTERESIS UDG-02132 Clock PWM RAMP PowerGood VIN UVLO Threshold 1 2 3 4 5 6 7 1 2 1 2 3 4 5 6 7 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 where: • VIN is the desired start-up (UVLO) input voltage • RT is the timing resistor in kΩ (3) The variable UVLO function utilizes a 3-bit full adder to prevent spurious shut-downs or turn-ons due to spikes or fast line transients. When the adder reaches a total of seven counts in which the ramp duration is shorter the clock cycle a powergood signal is asserted, a soft-start initiated, and the upper and lower MOSFETs are turned off. Once the soft-start is initiated, the UVLO circuit must see a total count of seven cycles in which the ramp duration is longer than the clock cycle before an undervoltage condition is declared (See Figure 4). Figure 4. Undervoltage Lockout Operation Figure 5. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TPS40060 TPS40061 CSS  2.3 A 0.7 V tSTART (Farads) tSTART  2LCO (seconds) TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com The impedance of the input voltage can cause the input voltage, at the TPS4006x, to sag when the converter starts to operate and draw current from the input source. Therefore, there is voltage hysteresis that prevents nuisance shutdowns at the UVLO point. With RT chosen to select the operating frequency and RKFF chosen to select the start-up voltage, the amount of hysteresis voltage is shown in Figure 5. PROGRAMMING SOFT START TPS4006x uses a closed-loop approach to ensure a controlled ramp on the output during start-up. Soft-start is programmed by charging an external capacitor (CSS) via an internally generated current source. The voltage on CSS minus 0.85 V, is fed into a separate non-inverting input to the error amplifier (in addition to FB and 0.7-V VREF). The loop is closed on the lower of the (VCSS – 0.85 V) voltage or the internal reference voltage (0.7-V VREF). Once the (VCSS – 0.85 V) voltage rises above the internal reference voltage, regulation is based on the internal reference. To ensure a controlled ramp-up of the output voltage the soft-start time should be greater than the L-CO time constant as described in Equation 4. (4) There is a direct correlation between tSTART and the input current required during start-up. The faster tSTART, the higher the input current required during start-up. This relationship is describe in more detail in the section titled, Programming the Current Limit, which follows. The soft-start capacitance, CSS, is described in Equation 5. For applications in which the VIN supply ramps up slowly, (typically between 50 ms and 100 ms) it may be necessary to increase the soft-start time to between approximately 2 ms and 5 ms to prevent nuisance UVLO tripping. The soft-start time should be longer than the time that the VINsupply transitions between 6 V and 7 V. (5) 10 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 RILIM IOCRDS(on)[max] ISINK  VOS ISINK () ( ) ( ) O O LIM LOAD START C V I I A t é ´ ù = ê ú + ë û TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 PROGRAMMING CURRENT LIMIT This device uses a two-tier approach for overcurrent protection. The first tier is a pulse-by-pulse protection scheme. Current limit is implemented on the high-side MOSFET by sensing the voltage drop across the MOSFET when the gate is driven low. The MOSFET voltage is compared to the voltage dropped across a resistor connected from VIN pin to the ILIM pin when driven by a constant current sink. If the voltage drop across the MOSFET exceeds the voltage drop across the ILIM resistor, the switching pulse is immediately terminated. The MOSFET remains off until the next switching cycle is initiated. The second tier consists of a fault counter. The fault counter is incremented on an overcurrent pulse and decremented on a clock cycle without an overcurrent pulse. When the counter reaches seven (7) a restart is issued and seven soft-start cycles are initiated. Both the upper and lower MOSFETs are turned off during this period. The counter is decremented on each soft-start cycle. When the counter is decremented to zero, the PWM is re-enabled. If the fault has been removed the output starts up normally. If the output is still present the counter counts seven overcurrent pulses and re-enters the second-tier fault mode. See Figure 7 for typical overcurrent protection waveforms. The minimum current limit setpoint (ILIM) depends on tSTART, CO, VO, and the load current at start-up (ILOAD). (6) The current limit programming resistor (RILIM) is calculated using Equation 7. Care must be taken in choosing the values used for VOS and ISINK in the equation. In order to ensure the output current at the overcurrent level, the minimum value of ISINK and the maximum value of VOS must be used. where: • ISINK is the current into the ILIM pin and is nominally 8.3 μA, minimum • IOC is the overcurrent setpoint which is the DC output current plus one-half of the peak inductor current • VOS is the overcurrent comparator offset and is 50 mV maximum (7) BP5, BP10 AND BPN10 INTERNAL VOLTAGE REGULATOR Start-up characteristics of the BP5, BP10 and BPN10 regulators are shown in Figure 7. Slight variations in the BP5 occurs dependent upon the switching frequency. Variation in the BPN10 and BP10 regulation characteristics is also based on the load presented by switching the external MOSFETs. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS40060 TPS40061 VBPx - Output Voltage - V VIN - Input Voltage - V INTERNAL REGULATOR OUTPUT VOLTAGE vs INPUT VOLTAGE 2 4 6 8 10 12 6 8 10 12 2 4 0 BP10 BP5 BPN10 UDG-02136 HDRV CLOCK VVIN-VSW SS 7 CURRENT LIMIT TRIPS (HDRV CYCLE TERMINATED BY CURRENT LIMIT TRIP) 7 SOFT-START CYCLES VILIM tBLANKING TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com Figure 6. Typical Current Limit Protection Waveforms Figure 7. CALCULATING THE BPN10 AND BP10V BYPASS CAPACITOR The BPN10 capacitance provides energy for the high-side driver. The BPN10 capacitor should be a good quality, high-frequency capacitor. The size of the bypass capacitor depends on the total gate charge of the high-side MOSFET and the amount of droop allowed on the bypass capacitor. The BPN10 capacitance is described in Equation 8. 12 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 L  VINVOVO VINIfSW (H) KFF ( IN(min) ) ( T(dummy) ) R = V - 3.5V ´ 65.27 ´R +1502 W RT(dummy)   1 fSYNC17.8210623 k CBP10V  QgSR V (F) CBPN10  Qg V (F) TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 (8) The 10-V reference pin, BP10V needs to provide energy for the synchronous MOSFET gate drive via the BP10V capacitor. Neglecting any efficiency penalty, the BP10V capacitance is described in Equation 9. (9) SYNCHRONIZING TO AN EXTERNAL SUPPLY The TPS4006x can be synchronized to an external clock through the SYNC pin. The SW node rises on the falling edge of the SYNC signal. The synchronization frequency should be in the range of 20% to 30% higher than its programmed free-run frequency. The clock frequency at the SYNC pin replaces the master clock generated by the oscillator circuit. Pulling the SYNC pin low programs the TPS4006x to freely run at the frequency programmed by RT. Internally, the SYNC pin has a pull-down current between 5 μA and 10 μA. In order to synchronize the device to an external clock signal, the SYNC pin has to be overdriven from the external clock circuit. Normal logic gates or an external MOSFET with a pull-up resistor of 10 kΩ is adequate. Internally there is a delay of between approximately 50 ns and 100 ns from the time the SYNC pin is pulled low and the HDRV signal goes low to turn on the upper MOSFET. Additionally, there is some delay as the MOSFET gate charges to turn on the upper MOSFET, typically between 20 ns and 50 ns. The higher synchronization must be factored in when programming the PWM ramp generator circuit. If the PWM ramp is interrupted by the SYNC pulse, a UVLO condition is declared and the PWM becomes disabled. Typically this is of concern under low-line conditions only. In any case, RKFF needs to be adjusted for the higher switching frequency. In order to specify the correct value for RKFF at the synchronizing frequency, calculate a 'dummy' value for RT that would cause the oscillator to run at the synchronizing frequency. Do not use this value of RT in the design. where: • fSYNC is the synchronous frequency in kHz (10) Use the value of RT(dummy) to calculate the value for RKFF. where: • RT(dummy) is in kΩ (11) This value of RKFF ensures that UVLO is not engaged when operating at the synchronization frequency. SELECTING THE INDUCTOR VALUE The inductor value determines the magnitude of ripple current in the output capacitors as well as the load current at which the converter enters discontinuous mode. Too large an inductance results in lower ripple current but is physically larger for the same load current. Too small an inductance results in larger ripple currents and a greater number of (or more expensive output capacitors for) the same output ripple voltage requirement. A good compromise is to select the inductance value such that the converter doesn't enter discontinuous mode until the load approximated somewhere between 10% and 30% of the rated output. The inductance value is described in Equation 12. where: • VO is the output voltage • ΔI is the peak-to-peak inductor current (12) Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 13 Product Folder Links: TPS40060 TPS40061 CO  LIOH 2 IOL 2 Vf 2 Vi 2 (F) V2  Vf 2 Vi 2 Volts2 EC  12 CV2 (J) I2  IOH 2 IOL 2 (Amperes)2 EL  12 LI2 (J) V  I ESR 1 8COfSW VPP TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com CALCULATING THE OUTPUT CAPACITANCE The output capacitance depends on the output ripple voltage requirement, output ripple current, as well as any output voltage deviation requirement during a load transient. The output ripple voltage is a function of both the output capacitance and capacitor ESR. The worst case output ripple is described in Equation 13. (13) The output ripple voltage is typically between 90% and 95% due to the ESR component. The output capacitance requirement typically increases in the presence of a load transient requirement. During a step load, the output capacitance must provide energy to the load (light to heavy load step) or absorb excess inductor energy (heavy-to-light load step) while maintaining the output voltage within acceptable limits. The amount of capacitance depends on the magnitude of the load step, the speed of the loop and the size of the inductor. Stepping the load from a heavy load to a light load results in an output overshoot. Excess energy stored in the inductor must be absorbed by the output capacitance. The energy stored in the inductor is described in Equation 14 and Equation 15. (14) where: where: • IOH is the output current under heavy load conditions • IOL is the output current under light load conditions (15) Energy in the capacitor is given by the following equation: (16) where: where: • Vf is the final peak capacitor voltage • Vi is the initial capacitor voltage (17) By substituting Equation 15 into Equation 14, substituting Equation 17 into Equation 16, setting Equation 14 equal to Equation 16 and solving for CO yields the following equation. (18) Loop Compensation Voltage-mode buck-type converters are typically compensated using Type III networks. Since the TPS40060 and TPS40061 use voltage feedforward control, the gain of the PWM modulator with voltage feedforward circuit must be included. The generic modulator gain is described in Figure 8. 14 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 fC  fSW 4 (Hertz) BIAS O 0.7 R1 R V 0.7 ´ = W - fZ  1 2ESRCO (Hz) fLC  1 2LCO (Hz) ( ) ( ) IN min IN(min) MOD MOD dB RAMP RAMP V V A or A 20 log V V æ ö æ ö = ç ÷ = ´ ç ÷ ç ÷ ç ÷ è ø è ø D  VO VIN  VC VS or VO VC  VIN VS TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 Duty cycle, D, varies from 0 to 1 as the control voltage, VC, varies from the minimum ramp voltage to the maximum ramp voltage, VS. Also, for a synchronous buck converter, D = VO / VIN. To get the control voltage to output voltage modulator gain in terms of the input voltage and ramp voltage, (19) With the voltage feedforward function, the ramp slope is proportional to the input voltage. Therefore, the moderator DC gain is independent of the change of input voltage. For the TPS40060 and TPS40061 the modulator dc gain is shown in Equation 20, with VIN(min) as the minimum input voltage required to cause the ramp excursion to reach the maximum ramp amplitude of VRAMP. (20) Calculate the Poles and Zeros For a buck converter using voltage mode control there is a double pole due to the output L-CO. The double pole is located at the frequency calculated in Equation 21. (21) There is also a zero created by the output capacitance, CO, and its associated ESR. The ESR zero is located at the frequency calculated in Equation 22. (22) Calculate the value of RBIAS to set the output voltage, VO. (23) The maximum crossover frequency (0 dB loop gain) is set by Equation 24. (24) Typically, fC is selected to be close to the midpoint between the L-CO double pole and the ESR zero. At this frequency, the control to output gain has a –2 slope (-40 dB/decade), while the Type III topology has a +1 slope (20 dB/decade), resulting in an overall closed loop –1 slope (–20 dB/decade). Figure 9 shows the modulator gain, L-C filter, output capacitor ESR zero, and the resulting response to be compensated. A Type III topology, shown in Figure 10, has two zero-pole pairs in addition to a pole at the origin. The gain and phase boost of a Type III topology is shown in Figure 11. The two zeros are used to compensate the L-CO double pole and provide phase boost. The double pole is used to compensate for the ESR zero and provide controlled gain roll-off. In many cases the second pole can be eliminated and the amplifier's gain roll-off used to roll-off the overall gain at higher frequencies. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 15 Product Folder Links: TPS40060 TPS40061 fC  1 2R1C2G (Hertz) fP1  1 2R2C2 (Hz) fP2  1 2R3C3 (Hz) fZ1  1 2R2C1 (Hz) fZ2  1 2R1C3 (Hz) RBIAS UDG−02189 + R1 R3 C3 C2 (optional) C1 R2 7 8 VREF COMP VFB VOUT GAIN 180° −90° −270° PHASE + 1 − 1 − 1 0 dB MODULATOR GAIN vs SWITCHING FREQUENCY ModulatorGain - dB fSW - Switching Frequency - Hz 100 1 k 10 k 100 k ESR Zero, + 1 LC Filter, - 2 AMOD = VIN(min) / VRAMP Resultant, - 1 VC PWM MODULATOR RELATIONSHIPS VS D = VC / VS TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com Figure 8. Figure 9. Figure 10. Type III Compensation of Configuration Figure 11. Type III Compensation Gain and Phase The poles and zeros for a type III network are described in Equation 25. (25) The value of R1 is somewhat arbitrary, but influences other component values. A value between 50kΩ and 100kΩ usually yields reasonable values. The unity gain frequency is described in Equation 26. where • G is the reciprocal of the modulator gain at fC (26) 16 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 PSW(fsw)  VINIOUTtSWfSW (Watts) IRMS  IOd AmperesRMS PCOND  IRMS 2 RDS(on)1TCRTJ25OC (W) R2(MIN)  VC (max) ISOURCE (min) ()  3.45 V 2.0 mA  1.725 k AMOD(f)  AMODfLC fC  2 and G  1 AMOD(f) TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 The modulator gain as a function of frequency at fC, is described in Equation 27. (27) Care must be taken not to load down the output of the error amplifier with the feedback resistor, R2, that is too small. The error amplifier has a finite output source and sink current which must be considered when sizing R2. Too small a value does not allow the output to swing over its full range. (28) dv/dt INDUCED TURN-ON MOSFETs are susceptible to dv/dt turn-on particularly in high-voltage (VDS) applications. The turn-on is caused by the capacitor divider that is formed by CGD and CGS. High dv/dt conditions and drain-to-source voltage, on the MOSFET causes current flow through CGD and causes the gate-to-source voltage to rise. If the gate-to-source voltage rises above the MOSFET threshold voltage, the MOSFET turns on, resulting in large shoot-through currents. Therefore the SR MOSFET should be chosen so that the CGD capacitance is smaller than the CGS capacitance. A 2-Ω to 5-Ω resistor in the upper MOSFET gate lead shapes the turn-on and dv/dt of the SW node and helps reduce the induced turn-on. HIGH-SIDE MOSFET POWER DISSIPATION The power dissipated in the external high-side MOSFET is comprised of conduction and switching losses. The conduction losses are a function of the IRMS current through the MOSFET and the RDS(on) of the MOSFET. The high-side MOSFET conduction losses are defined by Equation 29. where: • TCR is the temperature coefficient of the MOSFET RDS(on) (29) The TCR varies depending on MOSFET technology and manufacturer but is typically ranges between 3500 ppm/°C and 1000 ppm/°C. The IRMS current for the high side MOSFET is described in Equation 30. (30) The switching losses for the high-side MOSFET are described in Equation 31. where: • IO is the DC output current • tSW is the switching rise time, typically < 20 ns • fSW is the switching frequency (31) Typical switching waveforms are shown in Figure 12. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 17 Product Folder Links: TPS40060 TPS40061 PSR  PDCPRRPCOND (W) PRR  0.5QRRVINfSW (W) PDC  2IOVFtDELAYfSW (W) IRMS  IO1d ARMS PT  PCONDPSW(fsw) (W) PT  TJTA JA (W) UDG-02179 DI ANTI-CROSS CONDUCTION SYNCHRONOUS RECTIFIER ON BODY DIODE CONDUCTION BODY DIODE CONDUCTION HIGH SIDE ON ID1 ID2 IO SW 0  d 1-d TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com Figure 12. Inductor Current and SW Node Waveforms The maximum allowable power dissipation in the MOSFET is determined by the following equation. (32) where: (33) and ΘJA is the package thermal impedance. SYNCHRONOUS RECTIFIER MOSFET POWER DISSIPATION The power dissipated in the synchronous rectifier MOSFET is comprised of three components: RDS(on) conduction losses, body diode conduction losses, and reverse recovery losses. RDS(on) conduction losses can be found using Equation 29 and the RMS current through the synchronous rectifier MOSFET is described in Equation 34. (34) The body-diode conduction losses are due to forward conduction of the body diode during the anti-cross conduction delay time. The body diode conduction losses are described by Equation 35. where: • VF is the body diode forward voltage • tDELAY is the delay time just before the SW node rises (35) The 2-multiplier is used because the body-diode conducts twice during each cycle (once on the rising edge and once on the falling edge) The reverse recovery losses are due to the time it takes for the body diode to recovery from a forward bias to a reverse blocking state. The reverse recovery losses are described in Equation 36. where: • QRR is the reverse recovery charge of the body diode (36) The total synchronous rectifier MOSFET power dissipation is described in Equation 37. (37) 18 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 ( ) ( ) ( ) ( ) J A Q JA IN SW g T T I V f Hz 2 Q æ é - ù ö ç ê ú - ÷ ç êë q ´ úû ÷ = è ø ´ PT  2QgfSWIQVIN (W) PT  2PD VDR IQVIN (W) PD = Qg ´ VDR ´ fSW (W / driver) TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 TPS40060/TPS40061 POWER DISSIPATION The power dissipation in the TPS40060 and TPS40061 is largely dependent on the MOSFET driver currents and the input voltage. The driver current is proportional to the total gate charge, Qg, of the external MOSFETs. Driver power (neglecting external gate resistance, (refer to the second reference in the REFERENCES section) can be calculated from Equation 38. (38) And the total power dissipation in the device, assuming MOSFETs with similar gate charges for both the highside and synchronous rectifier is described in Equation 39. (39) or where: • IQ is the quiescent operating current (neglecting drivers) (40) The maximum power capability of the device's PowerPad package is dependent on the layout as well as air flow. The thermal impedance from junction to air, assuming 2 oz. copper trace and thermal pad with solder and no air flow. ΘJA = 36.51°C/W The maximum allowable package power dissipation is related to ambient temperature by Equation 36. Substituting Equation 32 into Equation 40 and solving for fSW yields the maximum operating frequency for the TPS40060 and TPS40061. The result is: (41) Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 19 Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com LAYOUT CONSIDERATIONS THE PowerPAD™ PACKAGE The PowerPAD package provides low thermal impedance for heat removal from the device. The PowerPAD derives its name and low thermal impedance from the large bonding pad on the bottom of the device. For maximum thermal performance, the circuit board must have an area of solder-tinned-copper underneath the package. The dimensions of this area depends on the size of the PowerPAD package. For a 16-pin TSSOP (PWP) package the dimensions of the circuit board pad are 5 mm x 3.4 mm. The dimensions of the package pad are shown in Figure 13. Thermal vias connect this area to internal or external copper planes and should have a drill diameter sufficiently small so that the via hole is effectively plugged when the barrel of the via is plated with copper. This plug is needed to prevent wicking the solder away from the interface between the package body and the solder-tinned area under the device during solder reflow. Drill diameters of 0.33 mm (13 mils) works well when 1-oz copper is plated at the surface of the board while simultaneously plating the barrel of the via. If the thermal vias are not plugged when the copper plating is performed, then a solder mask material should be used to cap the vias with a diameter equal to the via diameter of 0.1 mm minimum. This capping prevents the solder from being wicked through the thermal vias and potentially creating a solder void under the package. Refer to PowerPAD Thermally Enhanced Package (see REFERENCES section) for more information on the PowerPAD package. Figure 13. PowerPAD Dimensions MOSFET PACKAGING MOSFET package selection depends on MOSFET power dissipation and the projected operating conditions. In general, for a surface-mount applications, the DPAK style package provides the lowest thermal impedance (θJA) and, therefore, the highest power dissipation capability. However, the effectiveness of the DPAK depends on proper layout and thermal management. The θJAspecified in the MOSFET data sheet refers to a given copper area and thickness. In most cases, a thermal impedance of 40°C/W requires one square inch of 2-ounce copper on a G-10/FR-4 board. Lower thermal impedances can be achieved at the expense of board area. Please refer to the selected MOSFET's data sheet for more information regarding proper mounting. GROUNDING AND CIRCUIT LAYOUT CONSIDERATIONS The device provides separate signal ground (SGND) and power ground (PGND) pins. It is important that circuit grounds are properly separated. Each ground should consist of a plane to minimize its impedance if possible. The high power noisy circuits such as the output, synchronous rectifier, MOSFET driver decoupling capacitor (BP10), and the input capacitor should be connected to PGND plane at the input capacitor. Sensitive nodes such as the FB resistor divider, RT, and ILIM should be connected to the SGND plane. The SGND plane should only make a single point connection to the PGND plane. 20 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 Component placement should ensure that bypass capacitors (BP10, BP5, and BPN10) are located as close as possible to their respective power and ground pins. Also, sensitive circuits such as FB, RT and ILIM should not be located near high dv/dt nodes such as HDRV, LDRV, BPN10, and the switch node (SW). Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 21 Product Folder Links: TPS40060 TPS40061 PSW(fsw)  VINIOtSWfSW  55 V5 A20 ns130 kHz  0.715 W PCOND  1.220.12(10.007(15025))  0.324 W IRMS  IOd  50.0588  1.2 A I  IO20.2  520.2  2.0 A fSW  0.0588 400 ns  147 kHz 1 TSW  fSW    VO(min) VIN(max) TON    VO(min) VIN(max)  tON TSW or dMIN  VO(min) VIN(max)  0.0588 dMAX  VO(max) VIN(min)  0.187 TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com DESIGN EXAMPLE • Input voltage: 18 VDC to 55 VDC • Output voltage: 3.3 V ±2% • Output current: 5 A (maximum, steady-state), 7 A (surge, 10-ms duration, 10% duty cycle maximum) • Output ripple: 33 mVP-P at 5 A • Output load response: 0.3 V => 10% to 90% step load change • Operating temperature: –40°C to 85°C • fSW = 130 kHz 1. Calculate maximum and minimum duty cycles (42) 2. Select switching frequency The switching frequency is based on the minimum duty cycle ratio and the propagation delay of the current limit comparator. In order to maintain current limit capability, the on time of the upper MOSFET, tON, must be greater than 330 ns (see Electrical Characteristics table). Therefore (43) (44) Using 400 ns to provide margin, (45) Since the oscillator can vary by 10%, decrease fSW, by 10% fSW = 0.9 × 147 kHz = 130 kHz and therefore choose a frequency of 130 kHz. 3. Select ΔI In this case ΔI is chosen so that the converter enters discontinuous mode at 20% of nominal load. (46) 4. Calculate the high-side MOSFET power losses Power losses in the high-side MOSFET (Si9407AGY) at 55-VIN where switching losses dominate can be calculated from Equation 46 through Equation 49. (47) substituting Equation 47 into Equation 29 yields (48) and from Equation 31, the switching losses can be determined. (49) The MOSFET junction temperature can be found by substituting Equation 33 into Equation 32 22 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 RT   1 fSW17.82 E0623 k  408 k, use 412 k (55 3.3) 3.3 L 11.9 H 55 2 130 kHZ - ´ = = m ´ ´ J SR JA A ( ) T = P ´ q + T = 0.644 ´ 40 + 85 = 111°C SR RR COND DC P = P ´P ´P = 0.107 + 0.485 + 0.052 = 0.644 W PRR  0.5QRRVINfSW  0.530 nC55 V130 kHz  0.107 W DC O FD DELAY SW P = 2´I ´ V ´ t ´ f = 2´ 5 A ´ 0.8 V ´ 50 ns ´130 kHZ = 0.052 W ( ( )) 2 COND P = 4.85 ´ 0.011´ 1+ 0.007 150 - 25 = 0.485 W IRMS  IO1d  510.0588  4.85 ARMS TJ  PCONDPSWJATA  (0.3240.715)4085  127OC TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 (50) 5. Calculate synchronous rectifier losses The synchronous rectifier MOSFET has two loss components, conduction, and diode reverse recovery losses. The conduction losses are due to IRMS losses as well as body diode conduction losses during the dead time associated with the anti-cross conduction delay. The IRMS current through the synchronous rectifier from Equation 51 (51) The synchronous MOSFET conduction loss from Equation 29 is: (52) The body diode conduction loss from Equation 35 is: (53) The body diode reverse recovery loss from Equation 36 is: (54) The total power dissipated in the synchronous rectifier MOSFET from Equation 37 is: (55) The junction temperature of the synchronous rectifier at 85°C is: (56) In typical applications, paralleling the synchronous rectifier MOSFET with a Schottky rectifier increases the overall converter efficiency by approximately 2% due to the lower power dissipation during the body diode conduction and reverse recovery periods. 6. Calculate the Inductor Value The inductor value is calculated from Equation 12. (57) A standard inductor value of 10-μH is chosen. A Coev DXM1306-10RO or Panasonic ETQPF102HFA could be used. 7. Setting the switching frequency The clock frequency is set with a resistor (RT) from the RT pin to ground. The value of RT can be derived from following Equation 58, with fSW in kHz. (58) 8. Programming the Ramp Generator Circuit The PWM ramp is programmed through a resistor (RKFF) from the KFF pin to VIN. The ramp generator also controls the input UVLO voltage. For an undervoltage level of 14.4V (20% below the 18 VIN(min)), RKFF is calculated in Equation 59. RKFF = (80%xVIN(min) – 3.5)(65.27 ×RT + 1502) Ω = 309 kΩ, use 301 kΩ (59) Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 23 Product Folder Links: TPS40060 TPS40061 fZ  1 20.012180 F  74 kHz fLC  1 2 10 H180 F  3.7 kHz AMOD(dB) = 20 ´log(9) = 19 dB MOD 18 A 9 2 = = RILIM 100.14 ISINK  VOS ISINK   100.14 8.3 A  (50 mV) 8.3 A   175 k  174 k ILIM 180 F3.3 1 m 7.0  7.6 A CSS  2.3 A 0.7 V 1 ms  3.28 nF  3300 pF 33 mV  2.0ESR 1 8180 F130 kHz 33 mV  2.0ESR 1 8127 F130 kHz CO  10 H5212 3.323.02  127 F TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com 9. Calculating the Output Capacitance (CO) In this example. the output capacitance is determined by the load response requirement of ΔV = 0.3 V for a 1 A to 5 A step load. CO can be calculated using Equation 18. (60) Using Equation 13 calculate the ESR required to meet the output ripple requirements. (61) ESR = 8.9 mΩ In order to get the required ESR, the capacitance needs to be greater than the 127-μF calculated. For example, a single Panasonic SP capacitor, 180-μF with ESR of 12 mΩ can be used. Re-calculating the ESR required with the new value of 180-μF is shown in Equation 62. (62) ESR = 11.1 mΩ 10. Calculate the Soft-Start Capacitor (CSS) This design requires a soft-start time (tSTART) of 1 ms. CSS is calculated in Equation 63. (63) 11. Calculate the Current Limit Resistor (RILIM) The current limit set point depends on tSTART, VO, CO and ILOAD at start up as shown in Equation 7. (64) Set ILIM for 10.0 A minimum, then from Equation 7 (65) 12. Calculate Loop Compensation Values Calculate the DC modulator gain (AMOD) from Equation 20. (66) (67) Calculate the output poles and zeros from Equation 21 and Equation 22 of the L-C filter. (68) and (69) Select the close-loop 0 dB crossover frequency, fC. For this example fC = 10 kHz. Select the double zero location for the Type III compensation network at the output filter double pole at 3.7 kHz. Select the double pole location for the Type III compensation network at the output capacitor ESR zero at 73.7 kHz. 24 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 CBP10V  QgSR V  57 nC 0.5  114 nF CBPN10  Qg V  30 nC 0.5  60 nF RBIAS  0.7 VR1 VO0.7 V  0.7 V100k 3.3 V0.7 V  26.9 k, choose 26.7 k Z1 1 1 f C1 4301pF, choose 3900 pF 2 R2 C1 2 10 k 3.7 kHz = \ = = p´ ´ p´ W´ P1 1 1 f R2 9.82 k , choose 10 k 2 R2 C2 2 220 pF 73.7 kHz = \ = = W W p´ ´ p´ ´ C 1 1 f C2 196 pF, choose 220 pF 2 R1 C2 G 2 100 k 0.81 10 kHz = \ = = p´ ´ ´ p´ W´ ´ P2 1 1 f R3 4.59 k , choose 4.64 k 2 R3 C3 2 470 pF 73.7 kHz = \ = = W W p´ ´ p´ ´ fZ2  1 2R1C3  C3  1 2100 k3.7 kHz  430 pF, choose 470 pF MOD(f ) 1 1 G 0.81 A 1.23 = = = 2 2 LC MOD(f ) MOD C f 3.7 kHz A A 9 1.23 f 10 kHz æ ö æ ö = ´ ç ÷ = ´ ç ÷ = è ø è ø TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 The amplifier gain at the crossover frequency of 10 kHz is determined by the reciprocal of the modulator gain AMOD at the crossover frequency from Equation 27. (70) And also from Equation 27. (71) Choose R1 = 100 kΩ The poles and zeros for a Type III network are described in Equation 25 and Equation 26. (72) (73) (74) (75) (76) Calculate the value of RBIAS from Equation 23 with R1 = 100 kΩ. (77) CALCULATING THE BPN10 AND BP10V BYPASS CAPACITANCE The size of the bypass capacitor depends on the total gate charge of the MOSFET being used and the amount of droop allowed on the bypass capacitor. The BPN10 capacitance, allowing for a 0.5-V droop on the BPN10 pin from Equation 8 is shown in Equation 78. (78) and the BP10V capacitance from Equation 9 is shown in Equation 79. (79) For this application, a 0.1-μF capacitor was used for the BPN10V and a 1.0-μF was used for the BP10V bypass capacitor. Figure 14 shows component selection for the 18-V through 55-V to 3.3-V at 5-A dc-to-dc converter specified in the design example. GATE DRIVE CONFIGURATION Due to the possibility of dv/dt induced turn-on from the fast MOSFET switching times, high VDS voltage and low gate threshold voltage of the Si4470, the design includes a 2-Ω in the gate lead of the upper MOSFET. The resistor can be used to shape the low-to-high transition of the Switch node and reduce the tendency of dv/dtinduced turn on. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 25 Product Folder Links: TPS40060 TPS40061 5 13 12 16 15 1 2 3 KFF RT BP5 SGND VIN BPN10 SW BP10 4 SYNC 11 ILIM TPS40060PWP 6 SS/SD 7 VFB 8 COMP HDRV 14 LDRV 10 PGND 9 + − + − PGND RILIM 174 kΩ 0.1 μF 2 Ω 10 μH Si4470 1.0 μF Si9407 CO 180 μF RT 412 kΩ RKFF 301 kΩ UDG−02161 0.1 μF CSS 3300 pF C1 3900 pF R2 10 kΩ R1 R3 100kΩ 4.64 kΩ C2 220 pF C3 470 pF RSW 10 Ω 30BQ060 RBIAS 26.7 kΩ VOUT VIN TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com Figure 14. Design Example, 48 V to 3.3 V at 5 A dc-to-dc Converter REFERENCES 1. Balogh, Laszlo, Design and Application Guide for High Speed MOSFET Gate Drive Circuits, Texas Instruments/Unitrode Corporation, Power Supply Design Seminar, SEM-1400 Topic 2. 2. PowerPAD Thermally Enhanced Package Texas Instruments, Semiconductor Group, Technical Brief: TI Literature No. SLMA002 26 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 www.ti.com SLUS543F –DECEMBER 2002–REVISED JUNE 2013 REVISION HISTORY Changes from Revision E (June 2006) to Revision F Page • Changed reference to Figure 13, PowerPad Dimensions, to Figure 14, Design Example, 48 V to 3.3 V at 5 A dc-todc Converter ......................................................................................................................................................................... 7 • Changed both (CSS – 0.85 V) voltages to (VCSS – 0.85 V) in Programming Soft Start ....................................................... 10 • Changed turn-on (IL) to start-up (ILOAD) in the third paragraph of Programming Current Limit section. ............................. 11 • Changed first instance of BPN10 to BP10 in respective section title. ................................................................................ 11 • Added high-side before MOSFET in the Calculating the BP10 and BP10V Bypass Capacitor section ............................. 12 • Changed HDRV signal goes high to ...goes low in the Synchronizing to an External Supply section ............................... 13 • Added equation definition for fSYNC to Equation 10 ............................................................................................................. 13 • Deleted k from KΩ at the end of equation Equation 11 ...................................................................................................... 13 • Added (dummy) to RT in Equation 11 definition ................................................................................................................. 13 • Changed sequence of equation substitutions from: Equation 14 into Equation 13, Equation 16 into Equation 15, Equation 13 equal to Equation 15, to: Equation 15 into Equation 14, Equation 17 into Equation 16, Equation 14 equal to Equation 16 ........................................................................................................................................................... 14 • Added generic before modulator gain in first paragraph of the Loop Compensation section ............................................ 14 • Deleted with VIN being the minimum input voltage required to cause the ramp excursion to cover the entire switching period. from first paragraph of the Loop Compensation section ........................................................................................ 14 • Deleted previous Equation 19, which was AMOD = VIN / VS or AMOD(db) = 20 × log (VIN / VS ) ............................................. 14 • Changed figure reference for modulator gain in the Loop Compensation from Figure 6 (Typical Current Limit Protection Waveforms) to Figure 8 (PWM MODULATOR RELATIONSHIPS) ................................................................... 14 • Added moderator DC gain and new Equation 20 to Loop Compensation section ............................................................. 15 • Changed VOUT to VOin sentence before and in Equation 23 .............................................................................................. 15 • Changed calculated in to set by in sentence before Equation 24 ...................................................................................... 15 • Changed VIN / VS to VIN(min) / VRAMP in the Modulator Gain vs Switching Frequency graph ............................................... 15 • Changed the TCR minimum value from 0.0035 to 3500 and the maximum from 0.010 to 10000 in the second paragraph of the High-Side MOSFET Power Dissipation section ...................................................................................... 17 • Changed VDD to VIN in Equation 41 .................................................................................................................................... 19 • Changed PowerPAD Dimensions to include x and y axis values ....................................................................................... 20 • Added high-side MOSFET to step four title ........................................................................................................................ 22 • Changed reference to substituting Equation 30 to Equation 47 ......................................................................................... 22 • Deleted IRMS 2 × RDS(ON) from synchronous MOSFET conduction equation ........................................................................ 23 • Changed synchronous MOSFET conduction equation equals value from 0.10 to 0.485 ................................................... 23 • Changed body diode conduction equation values: 100 ns to 50 ns and 0.104 W to 0.052 W ........................................... 23 • Changed power dissipation equation values: 0.1 to 0.485, 0.104 to 0.052, 0.311 W to 0.644 W ..................................... 23 • Changed junction temperature equation values: (0.311) to 0.644, 97°C to 111°C ............................................................ 23 • Changed Step 6 reference to Equation 11 to Equation 12 ................................................................................................. 23 • Changed inductor value equation in Step 6: replaced value of 48 with 55 and 11.8 with 11.9 .......................................... 23 • Changed RKFF equation values in Step 8:133.7 to 309 kΩ, 133 to 301 kΩ ........................................................................ 23 • Added 80%x before VIN(min) in RKFF equation in Step 8 ....................................................................................................... 23 • Changed first ESR value in Step 9 from 12.7 to 8.9 mΩ .................................................................................................... 24 • Changed second ESR value in Step 9 from 13.8 to 11.1 mΩ ............................................................................................ 24 • Changed DC modulator gain values in both equations: 10 to 18, 5 to 9; (5.0) to 9, 14 to 19 dB ...................................... 24 • Changed AMOD crossover frequency equation values: 5 to 9, 0.68 to 1.23 ..................................................................... 25 • Changed gain (G) equation values: 0.68 to 1.23, 1.46 to 0.81 .......................................................................................... 25 • Changed poles and zeros equation values: Equation 73, 73.3 to 73.7 kHZ, 4.62 to 4.59 kΩ; Equation 74, 3.29 to 0.81, 1.46 to 10 kHZ, 109 to 196 pF, 100 to 220 pF; Equation 75, 100 to 200 pF, 73.3 to 73.7 kHz, 21.7 to 9.82 kΩ, Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 27 Product Folder Links: TPS40060 TPS40061 TPS40060 TPS40061 SLUS543F –DECEMBER 2002–REVISED JUNE 2013 www.ti.com 21.5 to 10 kΩ; Equation 76, 21.5 to 10 kΩ, 2000 to 4301 pF, 1800 to 3900 pF ................................................................ 25 • Changed Design Example graphic to include new values from equation: 133 to 301 kΩ, 1800 to 3900 pF, 21.5 to 10 kΩ, 100 to 220 pF. Si9470 to Si9407 ................................................................................................................................. 25 • Added link references to hard-coded references throughout document ............................................................................. 26 28 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: TPS40060 TPS40061 PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3) Op Temp (°C) Top-Side Markings (4) Samples TPS40060PWP ACTIVE HTSSOP PWP 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40060 TPS40060PWPG4 ACTIVE HTSSOP PWP 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40060 TPS40060PWPR ACTIVE HTSSOP PWP 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40060 TPS40060PWPRG4 ACTIVE HTSSOP PWP 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40060 TPS40061PWP ACTIVE HTSSOP PWP 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40061 TPS40061PWPG4 ACTIVE HTSSOP PWP 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40061 TPS40061PWPR ACTIVE HTSSOP PWP 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40061 TPS40061PWPRG4 ACTIVE HTSSOP PWP 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 40061 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. 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Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Literature Number: SLES025B January 2002–Revised May 2011 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Contents 1 Introduction ........................................................................................................................ 9 1.1 Features ...................................................................................................................... 9 1.2 Description ................................................................................................................. 10 1.3 Functional Block Diagram ................................................................................................ 11 1.4 Ordering Information ...................................................................................................... 11 1.5 Terminal Assignments—Normal Mode ................................................................................. 12 1.6 Terminal Assignments—External MCU Mode ......................................................................... 12 1.7 Terminal Functions ........................................................................................................ 13 1.8 Device Operation Modes ................................................................................................. 15 1.9 Terminal Assignments for Codec Port Interface Modes .............................................................. 15 2 Detailed Description .......................................................................................................... 16 2.1 Architectural Overview .................................................................................................... 16 2.1.1 Oscillator and PLL .............................................................................................. 16 2.1.2 Clock Generator and Sequencer Logic ...................................................................... 16 2.1.3 Adaptive Clock Generator (ACG) ............................................................................. 16 2.1.4 USB Transceiver ................................................................................................ 16 2.1.5 USB Serial Interface Engine (SIE) ........................................................................... 16 2.1.6 USB Buffer Manager (UBM) .................................................................................. 17 2.1.7 USB Frame Timer .............................................................................................. 17 2.1.8 USB Suspend and Resume Logic ............................................................................ 17 2.1.9 MCU Core ....................................................................................................... 17 2.1.10 MCU Memory ................................................................................................... 17 2.1.11 USB Endpoint Configuration Blocks and Buffer Space .................................................... 17 2.1.12 DMA Controller .................................................................................................. 17 2.1.13 Codec Port Interface ........................................................................................... 18 2.1.14 I2C Interface ..................................................................................................... 18 2.1.15 General-Purpose IO Ports (GPIO) ........................................................................... 18 2.1.16 Interrupt Logic ................................................................................................... 18 2.1.17 Reset Logic ...................................................................................................... 18 2.2 Device Operation .......................................................................................................... 19 2.2.1 Clock Generation ............................................................................................... 19 2.2.2 Boot Process .................................................................................................... 19 2.2.2.1 EEPROM Boot Process ........................................................................... 19 2.2.2.2 Host Boot Process ................................................................................. 19 2.2.2.3 EEPROM Data Organization ..................................................................... 20 2.2.2.4 I2C Serial EEPROM ................................................................................ 21 2.2.2.5 DFU Upgrade Process ............................................................................ 22 2.2.2.6 Download Error Recovery ........................................................................ 22 2.2.2.7 ROM Support Functions .......................................................................... 22 2.2.3 USB Enumeration .............................................................................................. 23 2.2.4 TAS1020B USB Reset Logic .................................................................................. 23 2.2.5 USB Suspend and Resume Modes .......................................................................... 24 2.2.5.1 USB Suspend Mode ............................................................................... 24 2.2.5.2 USB Resume Mode ................................................................................ 25 2.2.5.3 USB Remote Wake-Up Mode .................................................................... 25 2 Contents Copyright © 2002–2011, Texas Instruments Incorporated TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.6 Adaptive Clock Generator (ACG) ............................................................................. 26 2.2.6.1 Programmable Frequency Synthesizer ......................................................... 27 2.2.6.2 Capture Counter and Register ................................................................... 28 2.2.7 USB Transfers .................................................................................................. 29 2.2.7.1 Control Transfers ................................................................................... 29 2.2.7.2 Interrupt Transfers ................................................................................. 31 2.2.7.3 Bulk Transfers ...................................................................................... 32 2.2.7.4 Isochronous Transfers ............................................................................. 35 2.2.8 Microcontroller Unit ............................................................................................. 39 2.2.9 External MCU Mode Operation ............................................................................... 39 2.2.10 Interrupt Logic ................................................................................................... 39 2.2.11 General-Purpose I/O (GPIO) Ports ........................................................................... 45 2.2.11.1 Port 3 GPIO Bits ................................................................................... 47 2.2.11.2 Port 1 GPIO Bits ................................................................................... 48 2.2.11.3 Pullup Macro ........................................................................................ 48 2.2.12 DMA Controller .................................................................................................. 49 2.2.13 Codec Port Interface ........................................................................................... 49 2.2.13.1 General-Purpose Mode of Operation ............................................................ 50 2.2.13.2 Audio Codec (AC) '97 1.0 Mode of Operation ................................................. 57 2.2.13.3 Audio Codec (AC) '97 2.0 Mode of Operation ................................................. 58 2.2.13.4 Inter-IC Sound (I2S) Modes of Operation ....................................................... 59 2.2.13.5 AIC Mode of Operation ............................................................................ 61 2.2.13.6 Bulk Mode ........................................................................................... 61 2.2.14 I2C Interface ..................................................................................................... 62 2.2.14.1 Data Transfers ...................................................................................... 62 2.2.14.2 Single Byte Write ................................................................................... 63 2.2.14.3 Multiple Byte Write ................................................................................. 64 2.2.14.4 Single Byte Read ................................................................................... 64 2.2.14.5 Multiple Byte Read ................................................................................. 65 3 Electrical Specifications ..................................................................................................... 66 3.1 Absolute Maximum Ratings .............................................................................................. 66 3.2 Dissipation Ratings ........................................................................................................ 66 3.3 Recommended Operating Conditions .................................................................................. 66 3.4 Electrical Characteristics ................................................................................................. 66 3.5 Timing Characteristics .................................................................................................... 67 3.6 Clock and Control Signals ................................................................................................ 67 3.7 USB Signals When Sourced by TAS1020B ............................................................................ 67 3.8 Codec Port Interface Signals (AC ’97 Modes) ......................................................................... 68 3.9 Codec Port Interface Signals (I2S Modes) ............................................................................. 69 3.10 Codec Port Interface Signals (General-Purpose Mode) .............................................................. 69 3.11 I2C Interface Signals ...................................................................................................... 70 4 Application Information ...................................................................................................... 71 5 8K ROM ............................................................................................................................ 72 5.1 ROM Errata ................................................................................................................. 72 6 MCU Memory and Memory-Mapped Registers ....................................................................... 73 6.1 MCU Memory Space ...................................................................................................... 73 6.2 Internal Data Memory ..................................................................................................... 73 Copyright © 2002–2011, Texas Instruments Incorporated Contents 3 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.3 External MCU Mode Memory Space .................................................................................... 75 6.4 USB Endpoint Configuration Blocks and Data Buffer Space ........................................................ 76 6.4.1 USB Endpoint Configuration Blocks ......................................................................... 76 6.4.2 Data Buffer Space .............................................................................................. 76 6.4.3 USB OUT Endpoint Configuration Bytes .................................................................... 80 6.4.3.1 USB OUT Endpoint - Y Buffer Data Count Byte (OEPDCNTYx) ............................ 80 6.4.3.2 USB OUT Endpoint - Y Buffer Base Address Byte (OEPBBAYx) ........................... 80 6.4.3.3 USB OUT Endpoint - X Buffer Data Count Byte (OEPDCNTXx) ............................ 81 6.4.3.4 USB OUT Endpoint - X and Y Buffer Size Byte (OEPBSIZx) ................................ 81 6.4.3.5 USB OUT Endpoint - X Buffer Base Address Byte (OEPBBAXx) ........................... 81 6.4.3.6 USB OUT Endpoint - Configuration Byte (OEPCNFx) ........................................ 82 6.4.4 USB IN Endpoint Configuration Bytes ....................................................................... 83 6.4.4.1 USB IN Endpoint - Y Buffer Data Count Byte (IEPDCNTYx) ................................ 83 6.4.4.2 USB IN Endpoint - Y Buffer Base Address Byte (IEPBBAYx) ............................... 84 6.4.4.3 USB IN Endpoint - X Buffer Data Count Byte (IEPDCNTXx) ................................ 84 6.4.4.4 USB IN Endpoint - X and Y Buffer Size Byte (IEPBSIZx) .................................... 84 6.4.4.5 USB IN Endpoint - X Buffer Base Address Byte (IEPBBAXx) ............................... 85 6.4.4.6 USB IN Endpoint - Configuration Byte (IEPCNFx) ............................................ 85 6.4.5 USB Control Endpoint Setup Stage Data Packet Buffer .................................................. 86 6.5 Memory-Mapped Registers .............................................................................................. 87 6.5.1 USB Registers .................................................................................................. 89 6.5.1.1 USB Function Address Register (USBFADR - Address FFFFh) ............................ 89 6.5.1.2 USB Status Register (USBSTA - Address FFFEh) ............................................ 90 6.5.1.3 USB Interrupt Mask Register (USBIMSK - Address FFFDh) ................................. 91 6.5.1.4 USB Control Register (USBCTL - Address FFFCh) ........................................... 91 6.5.1.5 USB Frame Number Register (Low Byte) (USBFNL - Address FFFBh) .................... 92 6.5.1.6 USB Frame Number Register (High Byte) (USBFNH - Address FFFAh) ................... 92 6.5.2 DMA Registers .................................................................................................. 92 6.5.2.1 DMA Time Slot Assignment Register (Low Byte) (DMATSL1 - Address FFF0h) (DMATSL0 - Address FFEAh) .................................................................................. 92 6.5.2.2 DMA Time Slot Assignment Register (High Byte) (DMATSH1 - Address FFEFh) (DMATSH0 - Address FFE9h) ................................................................... 93 6.5.2.3 DMA Control Register (DMACTL1 - Address FFEEh) (DMACTL0 - Address FFE8h) .... 93 6.5.2.4 DMA Current Buffer Content Register (Low-Byte) (DMABCNT1L - Address FFF3h) (DMABCNT0L- Address FFEBh) ................................................................. 93 6.5.2.5 DMA Current Buffer Content Register (High Byte) (DMABCNT1H - Address FFF4h) (DMABCNT0H - Address FFECh) ............................................................... 94 6.5.2.6 DMA Bulk Packet Count Register (Low Byte) (DMABPCT0 - Address FFF2h) ........... 94 6.5.2.7 DMA Bulk Packet Count Register (High-byte) (DMABPCT1 - Address FFF1h) ........... 94 6.5.2.8 UBM Write Pointer (Low Byte) (Ch0WrPtrL - Address FFBCh) (Ch1WrPtrL - Address FFB8h) .............................................................................................. 94 6.5.2.9 UBM Write Pointer (High Byte) (Ch0WrPtrH - Address FFBBh) (Ch1WrPtrH - Address FFB7h) .............................................................................................. 95 6.5.2.10 DMA Read Pointer (Low Byte) (Ch0RdPtrL - Address FFBAh) (Ch1RdPtrL - Address FFB6h) .............................................................................................. 95 6.5.2.11 DMA Read Pointer (High Byte) (Ch0RdPtrH - Address FFB9h) (Ch1RdPtrH - Address FFB5h) .............................................................................................. 95 6.5.3 Adaptive Clock Generator Registers ......................................................................... 96 6.5.3.1 Adaptive Clock Generator1 Frequency Register (Byte 0) (ACG1FRQ0 - Address FFE7h) 4 Contents Copyright © 2002–2011, Texas Instruments Incorporated TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 ........................................................................................................ 96 6.5.3.2 Adaptive Clock Generator1 Frequency Register (Byte 1) (ACG1FRQ1 - Address FFE6h) ........................................................................................................ 96 6.5.3.3 Adaptive Clock Generator1 Frequency Register (Byte 2) (ACG1FRQ2 - Address FFE5h) ........................................................................................................ 96 6.5.3.4 Adaptive Clock Generator MCLK Capture Register (Low Byte) (ACGCAPL - Address FFE4h) .............................................................................................. 97 6.5.3.5 Adaptive Clock Generator MCLK Capture Register (High Byte) (ACGCAPH - Address FFE3h) .............................................................................................. 97 6.5.3.6 Adaptive Clock Generator2 Frequency Register (Byte 0) (ACG2FRQ0 - Address FFF9h) ........................................................................................................ 97 6.5.3.7 Adaptive Clock Generator2 Frequency Register (Byte 1) (ACG2FRQ1 - Address FFF8h) ........................................................................................................ 97 6.5.3.8 Adaptive Clock Generator2 Frequency Register (Byte 2) (ACG2FRQ2 - Address FFF7h) ........................................................................................................ 98 6.5.3.9 Adaptive Clock Generator2 Divider Control Register (ACG2DCTL - Address FFF6h) ... 98 6.5.3.10 Adaptive Clock Generator1 Divider Control Register (ACG1DCTL - Address FFE2h) ... 98 6.5.3.11 Adaptive Clock Generator Control Register (ACGCTL - Address FFE1h) ................. 99 6.5.4 Codec Port Interface Registers .............................................................................. 100 6.5.4.1 Codec Port Interface Configuration Register 1 (CPTCNF1 - Address FFE0h) ........... 100 6.5.4.2 Codec Port Interface Configuration Register 2 (CPTCNF2 - Address FFDFh) .......... 101 6.5.4.3 Codec Port Interface Configuration Register 3 (CPTCNF3 - Address FFDEh) .......... 102 6.5.4.4 Codec Port Interface Configuration Register 4 (CPTCNF4 - Address FFDDh) .......... 103 6.5.4.5 Codec Port Interface Control and Status Register (CPTCTL - Address FFDCh) ........ 104 6.5.4.6 Codec Port Interface Address Register (CPTADR - Address FFDBh) .................... 105 6.5.4.7 Codec Port Interface Data Register (Low Byte) (CPTDATL - Address FFDAh) ......... 105 6.5.4.8 Codec Port Interface Data Register (High Byte) (CPTDATH - Address FFD9h) ......... 105 6.5.4.9 Codec Port Interface Valid Time Slots Register (Low Byte) (CPTVSLL - Address FFD8h) ....................................................................................................... 106 6.5.4.10 Codec Port Interface Valid Time Slots Register (High Byte) (CPTVSLH - Address FFD7h) ....................................................................................................... 106 6.5.4.11 Codec Port Receive Interface Configuration Register 2 (CPTRXCNF2 - Address FFD6h) ....................................................................................................... 107 6.5.4.12 Codec Port Receive Interface Configuration Register 3 (CPTRXCNF3 - Address FFD5h) ....................................................................................................... 108 6.5.4.13 Codec Port Receive Interface Configuration Register 4 (CPTRXCNF4 - Address FFD4h) ....................................................................................................... 109 6.5.5 P3 Mask Register ............................................................................................. 109 6.5.5.1 P3 Mask Register (P3MSK - Address FFCAh) ............................................... 109 6.5.6 I2C Interface Registers ....................................................................................... 110 6.5.6.1 I2C Interface Address Register (I2CADR - Address FFC3h) ............................... 110 6.5.6.2 I2C Interface Receive Data Register (I2CDATI - Address FFC2h) ......................... 110 6.5.6.3 I2C Interface Transmit Data Register (I2CDATO - Address FFC1h) ....................... 110 6.5.6.4 I2C Interface Control and Status Register (I2CCTL - Address FFC0h) ................... 111 6.5.7 Miscellaneous Registers ..................................................................................... 112 6.5.7.1 USB OUT endpoint Interrupt Register (OEPINT - Address FFB4h) ....................... 112 6.5.7.2 USB IN endpoint Interrupt Register (IEPINT - Address FFB3h) ........................... 112 6.5.7.3 Interrupt Vector Register (VECINT - Address FFB2h) ....................................... 113 6.5.7.4 Global Control Register (GLOBCTL - Address FFB1h) ..................................... 114 6.5.7.5 Memory Configuration Register (MEMCFG - Address FFB0h) ............................. 114 Copyright © 2002–2011, Texas Instruments Incorporated Contents 5 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com List of Figures 2-1 Adaptive Clock Generator Block Diagram .................................................................................... 27 2-2 TAS1020B Interrupt, Reset, Suspend, and Resume Logic ................................................................. 41 2-3 Activation of Setup Stage Transaction Overwrite Interrupt ................................................................. 43 2-4 GPIO Port 1 and Port 3 Functionality.......................................................................................... 46 2-5 Pull-Up Logic Symbol............................................................................................................ 48 2-6 Codec Port Interface Parameters − AC '97 1.0 .............................................................................. 53 2-7 Codec Port Interface Parameters − AIC ...................................................................................... 54 2-8 Codec Port Interface Parameters – I2S........................................................................................ 57 2-9 Byte Reversal Example ......................................................................................................... 57 2-10 Connection of the TAS1020B to an AC '97 Codec .......................................................................... 58 2-11 Connection of the TAS1020B to Multiple AC '97 Codecs................................................................... 59 2-12 Bit Transfer on the I2C Bus ..................................................................................................... 62 2-13 I2C START and STOP Conditions ............................................................................................. 63 2-14 TAS1020B Acknowledge on the I2C Bus...................................................................................... 63 2-15 Single Byte Write Transfer ...................................................................................................... 64 2-16 Multiple Byte Write Transfer .................................................................................................... 64 2-17 Single Byte Read Transfer ...................................................................................................... 64 2-18 Multiple Byte Read Transfer .................................................................................................... 65 3-1 External Interrupt Timing Waveform ........................................................................................... 67 3-2 USB Differential Driver Timing Waveform..................................................................................... 67 3-3 BIT_CLK and SYNC Timing Waveforms...................................................................................... 68 3-4 SYNC, SD_IN, and SD_OUT Timing Waveforms............................................................................ 68 3-5 I2S Mode Timing Waveforms ................................................................................................... 69 3-6 General-Purpose Mode Timing Waveforms .................................................................................. 69 3-7 SCL and SDA Timing Waveforms.............................................................................................. 70 3-8 Start and Stop Conditions Timing Waveforms................................................................................ 70 3-9 Acknowledge Timing Waveform................................................................................................ 70 4-1 Typical TAS1020B Device Connections....................................................................................... 71 6-1 Boot Loader Mode Memory Map............................................................................................... 75 6-2 Normal Operating Mode Memory Map ........................................................................................ 75 6-3 USB Endpoint Configuration Blocks and Buffer Space Memory Map..................................................... 77 6 List of Figures Copyright © 2002–2011, Texas Instruments Incorporated TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 List of Tables 1-1 Terminal Functions—Normal Mode ........................................................................................... 13 1-2 Terminal Functions—External MCU Mode ................................................................................... 14 1-3 Operating Mode After Reset .................................................................................................... 15 1-4 Terminal Assignments for Codec Port Interface Modes..................................................................... 15 2-1 EEPROM Header ................................................................................................................ 21 2-2 AGC Control Registers .......................................................................................................... 27 2-3 ACG Frequency Registers ...................................................................................................... 28 2-4 Electrical Characteristics of Pullup Resistors................................................................................. 48 2-5 Terminal Assignments for Codec Port Interface General-Purpose Mode................................................. 50 2-6 Terminal Assignments for Codec Port Interface AC '97 1.0 Mode 2 ...................................................... 57 2-7 Terminal Assignments for Codec Port Interface AC '97 2.0 Mode 3 ...................................................... 58 2-8 Terminal Assignments for Codec Port Interface I2S Mode 4 and Mode 5 ................................................ 59 2-9 SLOT Assignments for Codec Port Interface I2S Mode 4................................................................... 60 2-10 SLOT Assignments for Codec Port Interface I2S Mode 5................................................................... 60 2-11 Terminal Assignments for Codec Port Interface AIC Mode 1 .............................................................. 61 6-1 USB Endpoint Configuration Blocks Address Map .......................................................................... 77 6-2 USB Control Endpoint Setup Data Packet Buffer Address Map ........................................................... 86 6-3 Memory-Mapped Registers Address Map .................................................................................... 87 Copyright © 2002–2011, Texas Instruments Incorporated List of Tables 7 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 8 List of Tables Copyright © 2002–2011, Texas Instruments Incorporated TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 USB Streaming Controller Check for Samples: TAS1020B 1 Introduction 1.1 Features 1 • Universal Serial Bus (USB) • DMA Controller – USB specification version 1.1 compatible – Two DMA channels to support streaming – USB audio class specification 1.0 compatible USB audio data to/from the codec port – Integrated USB transceiver interface – Supports 12 Mb/s data rate (full speed) – Each channel can support a single USB – Supports suspend/resume and remote isochronous endpoint wake-up – In the I2S mode the device can support – Supports control, interrupt, bulk, and DAC/ADCs at different sampling frequencies isochronous data transfer type – A circular programmable FIFO used for – Supports up to a total of seven IN endpoints isochronous audio data streaming and seven OUT endpoints in addition to the • Codec Port Interface control endpoint – Configurable to support AC '97 1.x, AC '97 – Data transfer type, data buffer size, single or 2.x, AIC, or I2S serial interface formats double buffering is programmable for each – I2S modes can support a combination of one endpoint stereo DAC and/or two stereo ADCs – On-chip adaptive clock generator (ACG) – Can be configured as a general-purpose supports asynchronous, synchronous and serial interface adaptive synchronization modes for – Can support bulk data transfer using DMA isochronous endpoints for higher throughput – To support synchronization for streaming • I2C Interface USB audio data, the ACG can be used to – Master only interface generate the master clock for the codec – Does not support a multimaster bus • Micro-Controller Unit (MCU) environment – Standard 8052 8-bit core – Programmable to 100 kb/s or 400 kb/s data – 8K bytes of program memory ROM that transfer speeds contains a boot loader program and a library – Supports wait states to accommodate slow of commonly used USB functions slaves – 6016 bytes of program memory RAM which • General Characteristics is loaded by the boot loader program – High performance 48-pin TQFP Package – 256 bytes of internal data memory RAM – On-chip phase-locked loop (PLL) with – Two GPIO ports internal oscillator is used to generate – MCU handles all USB control, interrupt, and internal clocks from a 6 MHz crystal input bulk endpoint transfers – Reset output available which is asserted for both system and USB reset – External MCU mode supports application firmware development – 8K ROM with boot loader program and commonly used USB functions library – 3.3 V core and I/O buffers 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2002–2011, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 1.2 Description The TAS1020B integrated circuit (IC) is a universal serial bus (USB) peripheral interface device designed specifically for applications that require isochronous data streaming. Applications include digital speakers, which require the streaming of digital audio data between the host PC and the speaker system via the USB connection. The TAS1020B device is fully compatible with the USB Specification Version 1.1 and the USB Audio Class 1.0 Specification. The TAS1020B uses a standard 8052 microcontroller unit (MCU) core with on-chip memory. The MCU memory includes 8K bytes of program memory ROM that contains a boot loader program. At initialization, the boot loader program downloads the application program code to a 6,016-byte RAM from either the host PC or a nonvolatile memory on the printed-circuit board (PCB). The MCU handles all USB control, interrupt and bulk endpoint transactions. DMA channels are provided to handle isochronous endpoint transactions. The USB interface includes an integrated transceiver that supports 12 Mb/s (full speed) data transfers. In addition to the USB control endpoint, support is provided for up to seven IN endpoints and seven OUT endpoints. The USB endpoints are fully configurable by the MCU application code using a set of endpoint configuration blocks that reside in on-chip RAM. All USB data transfer types are supported. The TAS1020B device also includes a codec port interface (C-Port) that can be configured to support several industry standard serial interface protocols. These protocols include the audio codec (AC) '97 Revision 1.X, the AC '97 Revision 2.X and several inter-IC sound (I2S) modes. A direct memory access (DMA) controller with two channels is provided for streaming the USB isochronous data packets to/from the codec port interface. Each DMA channel can support one USB isochronous endpoint. An on-chip phase lock loop (PLL) and adaptive clock generator (ACG) provide support for the USB synchronization modes, which include asynchronous, synchronous and adaptive. Other on-chip MCU peripherals include an inter-IC control (I2C) serial interface, and two 8-bit general-purpose input/output (GPIO) ports. The TAS1020B device is implemented in a 3.3-V 0.25 μm CMOS technology. 10 Introduction Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B 8052 Core I2C Control 8K ROM 6016 Byte RAM USB Serial OSC PLL ACG Suspend /Resume Logic I2C Bus C−Port Port−3 Port−1 USB SOF 6 MHz Interface Engine CODEC Interface 1520 Byte SRAM UBM DMA Global Control/Status Registers TQFP Texas Instruments Package Type Peripheral Device Audio Solutions 48 pins PFB T AS 1020B PFB TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 1.3 Functional Block Diagram 1.4 Ordering Information Copyright © 2002–2011, Texas Instruments Incorporated Introduction 11 Submit Documentation Feedback Product Folder Link(s): TAS1020B 2 3 P1.1 P1.0 NC DVDD NC P3.5 P3.4 P3.3 DVSS P3.2/XINT P3.1 P3.0 24 23 22 21 20 19 18 17 16 15 14 13 4 37 38 39 40 41 42 43 44 45 46 47 48 CSCLK CDATO MCLKO1 MCLKO2 RESET VREN SDA SCL AVSS XTALO XTALI PLLFILI 5 6 7 8 P1.5 P1.4 P1.3 36 35 34 33 32 31 30 CDATI CSYNC CRESET CSCHNE DV TEST EXTEN RSTO MCLKI PUR DP DM MRESET 29 28 27 26 9 10 11 12 25 1 P1.2 P1.7 P1.6 DD PLLFILO AV DVSS DVDD DD DVSS TAS1020B 2 3 MCUAD1 MCUAD0 MCURD DVDD MCUWR MCUINTO MCUALE MCUA10 DVSS XINT MCUA9 MCUA8 24 23 22 21 20 19 18 17 16 15 14 13 4 37 38 39 40 41 42 43 44 45 46 47 48 CSCLK CDATO MCLKO1 MCLKO2 RESET VREN SDA SCL AVSS XTALO XTALI PLLFILI 5 6 7 8 MCUAD4 MCUAD3 36 35 34 33 32 31 30 CDATI CSYNC CRESET DV TEST EXTEN RSTO MCLKI PUR DP DM MRESET 29 28 27 26 9 10 11 12 25 1 MCUAD2 DD PLLFILO AV DVSS DVDD DD DVSS TAS1020B MCUAD5 MCUAD6 MCUAD7 CSCHNE TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 1.5 Terminal Assignments—Normal Mode PFB PACKAGE (Normal Mode) (TOP VIEW) 1.6 Terminal Assignments—External MCU Mode PFB PACKAGE (External Mode) (TOP VIEW) 12 Introduction Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 1.7 Terminal Functions Table 1-1. Terminal Functions—Normal Mode TERMINAL I/O DESCRIPTION NAME PIN TYPE NO. AVDD Power 2 3.3-V analog supply voltage AVSS Power 45 Analog ground CSCLK CMOS 37 I/O Codec port interface serial clock: CSCLK is the serial clock for the codec port interface used to clock the CSYNC, CDATO, CDATI, CRESET, AND CSCHNE signals. CSYNC CMOS 35 I/O Codec port interface frame sync: CSYNC is the frame synchronization signal for the codec port interface. CDATO CMOS 38 O Codec port interface serial data out CDATI CMOS 36 I Codec port interface serial data in CRESET CMOS 34 O Codec port interface reset output (see Table 1-4 for alternate uses) CSCHNE CMOS 32 I/O Codec port interface secondary channel enable (see Table 1-4 for alternate uses) DP CMOS 6 I/O USB differential pair data signal plus. DP is the positive signal of the bidirectional USB differential pair used to connect the TAS1020B device to the universal serial bus. DM CMOS 7 I/O USB differential pair data signal minus. DM is the negative signal of the bidirectional USB differential pair used to connect the TAS1020B device to the universal serial bus. DVDD Power 8, 21, 33 3.3-V digital supply voltage DVSS Power 4, 16, 28 Digital ground EXTEN CMOS 11 I External MCU mode enable: Input used to enable the device for the external MCU mode MCLKI CMOS 3 I Master clock input. An input that can be used as the master clock for the codec port interface or the source for MCLKO2. MCLKO1 CMOS 39 O Master clock output 1: The output of the ACG that can be used as the master clock for the codec port interface and the codec. MCLKO2 CMOS 40 O Master clock output 2: An output that can be used as the master clock for the codec port interface and the codec used in I2S modes for receive. This clock signal can also be used as a miscellaneous clock. MRESET CMOS 9 I Master reset: An active low asynchronous reset for the device that resets all logic to the default state NC 20,22 Not used P1.[0:7] CMOS 23, 24, 25, I/O General-purpose I/O port [bits 0 through 7]: A bidirectional 8-bit I/O port with an internal 26, 27, 29, 100-μA active pullup 30, 31 P3.[0:5] CMOS 13, 14, 15, I/O General-purpose I/O port [bits 0 through 5]: A bidirectional I/O port with an internal 17, 18, 19 100-μA active pullup PLLFILI CMOS 48 I PLL loop filter input: Input to on-chip PLL from external filter components PLLFILO CMOS 1 O PLL loop filter output: Output from on-chip PLL to external filter components PUR CMOS 5 O USB data signal plus pullup resistor connect. PUR is used to connect the pullup resistor on the DP signal from a high-impedance state to 3.3 V. When the DP signal is connected to 3.3-V the host PC detects the connection of the TAS1020B device to the universal serial bus. RESET CMOS 41 O General-purpose active-low output which is memory mapped RSTO CMOS 12 O Reset output: An output that is active while the master reset input or the USB reset is active SCL CMOS 44 O I2C interface serial clock SDA CMOS 43 I/O I2C interface serial data TEST CMOS 10 I Test mode enable: Factory test mode VREN CMOS 42 O General-purpose active-low output which is memory mapped XINT CMOS 15 I External interrupt: An active low input used by external circuitry to interrupt the on-chip 8052 MCU XTALI CMOS 47 I Crystal input: Input to the on-chip oscillator from an external 6-MHz crystal XTALO CMOS 46 O Crystal Output: Output from the on-chip oscillator to an external 6-MHz crystal Copyright © 2002–2011, Texas Instruments Incorporated Introduction 13 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Table 1-2. Terminal Functions—External MCU Mode TERMINAL I/O DESCRIPTION NAME PIN TYPE NO. AVDD Power 2 - 3.3-V Analog supply voltage AVSS Power 45 - Analog ground CSCLK CMOS 37 I/O Codec port interface serial clock: CSCLK is the serial clock for the codec port interface used to clock the CSYNC, CDATO, CDATI, CRESET AND CSCHNE signals. CSYNC CMOS 35 I/O Codec port interface frame sync: CSYNC is the frame synchronization signal for the codec port interface. CDATO CMOS 38 O Codec port interface serial data output CDATI CMOS 36 I Codec port interface serial data input CRESET CMOS 34 O Codec port interface reset output (see Table 1-4 for alternate uses) CSCHNE CMOS 32 I/O Codec port interface secondary channel enable (see Table 1-4 for alternate uses) DP CMOS 6 I/O USB differential pair data signal plus: DP is the positive signal of the bidirectional USB differential pair used to connect the TAS1020B device to the universal serial bus. DM CMOS 7 I/O USB differential pair data signal minus. DM is the negative signal of the bidirectional USB differential pair used to connect the TAS1020B device to the universal serial bus. DVDD Power 8, 21, 33 - 3.3-V Digital supply voltage DVSS Power 4, 16, 28 - Digital ground EXTEN CMOS 11 I External MCU mode enable: Input used to enable the device for the external MCU mode. This signal uses a 3.3 V TTL/LVCMOS input buffer. MCLKI CMOS 3 I Master clock input: An input that can be used as the master clock for the codec port interface or the source for MCLKO2. MCLKO1 CMOS 39 O Master clock output 1: The output of the ACG that can be used as the master clock for the codec port interface and the codec. MCLKO2 CMOS 40 O Master clock output 2: An output that can be used as the master clock for the codec port interface and the codec. This clock signal can also be used as a miscellaneous clock. MRESET CMOS 9 I Master reset: An active low asynchronous reset for the device that resets all logic to the default state. MCUAD [0:7] CMOS 23, 24, 25, I/O MCU multiplexed address/data: Multiplexed address bits[0:7]/data bits[0:7] for external 26, 27, 29, MCU access to the TAS1020B external data memory space. 30, 31 MCUA [8:10] CMOS 13, 14, 17 I/O MCU address bus: Multiplexed address bus bits[8:10] for external MCU access to the TAS1020B external data memory space. MCUALE CMOS 18 I MCU address latch enable: Address latch enable for external MCU access to the TAS1020B external data memory space. MCUINTO CMOS 19 O MCU interrupt output: Interrupt output to be used for external MCU INTO input signal. All internal TAS1020B interrupt sources are read together to generate this output signal. MCUWR CMOS 20 I MCU write strobe: Write strobe for external MCU write access to the TAS1020B external data memory space. MCURD CMOS 22 I MCU read strobe: Read strobe for external MCU read access to the TAS1020B external data memory space. PLLFILI CMOS 48 I PLL loop filter input: Input to on-chip PLL from external filter components. PLLFILO CMOS 1 O PLL loop filter output: Output to on-chip PLL from external filter components. PUR CMOS 5 O USB data signal plus pullup resistor connect. PUR is used to connect the pullup resistor on the DP signal to 3.3V from a high-impedance state. When the DP signal is connected in a 3.3-V state, the host PC should detect the connection of the TAS1020B device to the universal serial bus. RESET CMOS 41 O General-purpose active-low output which is memory mapped RSTO CMOS 12 O Reset output: An output that is active while the master reset input or the USB reset is active. SCL CMOS 44 O I2C interface serial clock SDA CMOS 43 I/O I2C interface serial data input/output TEST CMOS 10 I Test mode enable: Factory text mode 14 Introduction Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Table 1-2. Terminal Functions—External MCU Mode (continued) TERMINAL I/O DESCRIPTION NAME PIN TYPE NO. VREN CMOS 42 O General-purpose active-low output which is memory mapped. XINT CMOS 15 I External interrupt: An active low input used by external circuitry to interrupt the on-chip 8052 MCU. XTALI CMOS 47 I Crystal input: Input to the on-chip oscillator from an external 6-MHz crystal. XTALO CMOS 46 O Crystal output: Output from the on-chip oscillator to an external 6-MHz crystal. 1.8 Device Operation Modes The EXTEN and TEST pins define the mode that the TAS1020B is in after reset. Table 1-3. Operating Mode After Reset MODE EXTEN TEST Normal mode - internal MCU 0 0 External MCU mode 1 0 Factory test 0 1 Factory test 1 1 1.9 Terminal Assignments for Codec Port Interface Modes The codec port interface has five modes of operation that support AC '97, I2S, and AIC codecs. There is also a general-purpose mode that is not specific to a serial interface. The mode is programmed by writing to the mode select field of the codec port interface configuration register 1 (CPTCNF1). The codec port interface terminals CSYNC, CSCLK, CDATO, CDATI, CRESET, and CSCHNE take on functionality appropriate to the mode programmed as shown in the following table. Table 1-4. Terminal Assignments for Codec Port Interface Modes(1) (2) (3) TERMINAL GP AIC AC '97 v1.x AC '97 v2.x I2S I2S NO. NAME Mode 0 Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 35 CSYNC CSYNC I/O FS O SYNC O SYNC O LRCK O LRCK1 O 37 CSCLK CSCLK I/O SCLK O BIT_CLK I BIT_CLK I SCLK O SCLK1 O 38 CDATO CDATO O DOUT O SD_OUT O SD_OUT O SDOUT1 O SDOUT1 O 36 CDATI CDATI I DIN I SD_IN I SD_IN1 I SDIN1 I SDIN2 I 34 CRESET CRESET O RESET O RESET O RESET O CRESET O SCLK2 O 32 CSCHNE NC O FC O NC O SD_IN2 I SDIN2 I LRCK2 O (1) Signal names and I/O direction are with respect to the TAS1020B device. The signal names used for the TAS1020B terminals for the various codec port interface modes reflect the nomenclature used by the codec devices. (2) NC indicates no connection for the terminal in a particular mode. The TAS1020B device drives the signal as an output for these cases. (3) The CSYNC and CSCLK signals can be programmed as either an input or an output in the general-purpose mode. Copyright © 2002–2011, Texas Instruments Incorporated Introduction 15 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 2 Detailed Description 2.1 Architectural Overview 2.1.1 Oscillator and PLL Using an external 6-MHz crystal, the TAS1020B derives the fundamental 48-MHz internal clock signal using an on-chip oscillator and PLL. Using the PLL output, the other required clock signals are generated by the clock generator and adaptive clock generator. 2.1.2 Clock Generator and Sequencer Logic Utilizing the 48-MHz output from the PLL, the clock generator logic generates all internal clock signals, except for the codec port interface master clock (MCLK) and serial clock (CSCLK) signals. The TAS1020B internal clocks include the 48-MHz clock, a 24-MHz clock, and a 12-MHz clock. A 12 MHz USB clock is also generated. The USB clock is the same as the internal 12-MHz clock when the TAS1020B is transmitting data, but is derived from the data when the TAS1020B is receiving data. To derive the USB clock when receiving USB data, the TAS1020B utilizes an internal digital PLL (DPLL) driven from the 48-MHz clock. The sequencer logic controls the access to the SRAM used for the USB endpoint configuration blocks and the USB endpoint buffer space. The SRAM can be accessed by the MCU, the USB buffer manager (UBM), or the DMA channels. The sequencer controls the access to the memory using a round-robin fixed priority arbitration scheme. This means that the sequencer logic generates grant signals for the MCU, UBM, and DMA channels at a predetermined fixed frequency. 2.1.3 Adaptive Clock Generator (ACG) The adaptive clock generator is used to generate a master clock output signal (MCLKO) to be used by the codec port interface and the codec device. To synchronize data sent to or received from the codec to the USB frame rate, the MCLKO signal generated by the adaptive clock generator must be used. The synchronization of the MCLKO signal to the USB frame rate is achieved by the ACG, which, in turn, is controlled by a soft PLL, implemented in the MCU. One of the tasks performed by the ACG is to maintain count of the number of MCLKO clocks between USB Start of Frame (SOF) events. This count is monitored by the soft PLL in the MCU. Based on this count, the soft PLL outputs corrections to the ACG to adjust MCLKO to obtain the correct number of MCLKO clocks between USB SOF events. MCLKI, the master clock input, can also be selected to source the clocks used by the codec port interface. When MCLKI is selected, it is used to derive the TAS1020B-sourced versions of the clocks CSCLK and CSYNC. In this scenario, the codec device would also use the same master clock signal (MCLKI). 2.1.4 USB Transceiver The TAS1020B provides an integrated transceiver for the USB port. The transceiver includes a differential output driver, a differential input receiver, and two single ended input buffers. The transceiver connects to the USB DP and DM signal terminals. 2.1.5 USB Serial Interface Engine (SIE) The serial interface engine logic manages the USB packet protocol for packets being received and transmitted by the TAS1020B. For packets being received, the SIE decodes the packet identifier field (PID) to determine the type of packet being received and to ensure the PID is valid. The SIE then calculates the cycle redundancy check (CRC) of the received token and data packets and compares the value to the CRC contained in the packet to verify that the packet was not corrupted during transmission. For transmitted token and data packets, the SIE generates the CRC that is transmitted with the packet. The SIE also generates the synchronization field (SYNC) and the correct PID for all transmitted packets. Another major function of the SIE is the serial-to-parallel conversion of received data packets and the parallel-to-serial conversion of transmitted data packets. 16 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.1.6 USB Buffer Manager (UBM) The USB buffer manager provides the control logic that interfaces the SIE to the USB endpoint buffers. One of the major functions of the UBM is to decode the USB function address to determine if the host PC is addressing the TAS1020B device USB peripheral function. In addition, the endpoint address field and direction signal are decoded to determine which particular USB endpoint is being addressed. Based on the direction of the USB transaction and the endpoint number, the UBM will either write or read the data packet to or from the appropriate USB endpoint data buffer. 2.1.7 USB Frame Timer The USB frame timer logic receives the start of frame (SOF) packet from the host PC each USB frame. Each frame, the logic stores the 11-bit frame number value from the SOF packet in a register and asserts the internal SOF signal. The frame number register can be read by the MCU and the value can be used as a time stamp. For USB frames in which the SOF packet is corrupted or not received, the frame timer logic will generate a pseudo start of frame (PSOF) signal and increment the frame number register. 2.1.8 USB Suspend and Resume Logic The USB suspend and resume logic detects suspend and resume conditions on the USB. This logic also provides the internal signals used to control the TAS1020B device when these conditions occur. The capability to resume operation from a suspend condition with a locally generated remote wake-up event is also provided. 2.1.9 MCU Core The TAS1020B uses an 8-bit microcontroller core that is based on the industry standard 8052. The MCU is software compatible with the 8052, 8032, 80C52, 80C53, and 87C52 MCUs. The 8052 MCU is the processing core of the TAS1020B and handles all USB control, interrupt and bulk endpoint transfers. Bulk out end-point transfers can also be handled by one of the two DMA channels. 2.1.10 MCU Memory In accordance with the industry standard 8052, the TAS1020B MCU memory is organized into program memory, external data memory and internal data memory. A boot ROM program is used to download the application code to a 6K byte RAM that is mapped to the program memory space. The external data memory includes the USB endpoint configuration blocks, USB data buffers, and memory mapped registers. The total external data memory space available is 1.5K bytes. A total of 256 bytes are provided for the internal data memory. 2.1.11 USB Endpoint Configuration Blocks and Buffer Space The USB endpoint configuration blocks are used by the MCU to configure and operate the required USB endpoints for a particular application. In addition to the control end-point, the TAS1020B supports a total of seven IN endpoints and seven OUT endpoints. A set of six bytes is provided for each endpoint to specify the endpoint type, buffer address, buffer size, and data packet byte count. The USB endpoint buffer configuration blocks and buffer space provided totals 1440 bytes. The buffer space to be used by a particular endpoint is fully configurable by the MCU for a particular application. Therefore, the MCU can configure each buffer based on the total number of endpoints to be used, the maximum packet size to be used for each endpoint, and the selection of single or double buffering. 2.1.12 DMA Controller Two DMA channels are provided to support the streaming of data for USB isochronous IN endpoints, Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 17 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com isochronous OUT endpoints, and bulk OUT endpoints. Each DMA channel can support one USB isochronous IN endpoint, or one isochronous OUT endpoint, or one bulk OUT endpoint. The DMA channels are used to stream data between the USB endpoint data buffers and the codec port interface. The USB endpoint number and direction can be programmed for each DMA channel. Also, the codec port interface time slots to be serviced by each DMA channel can be programmed. 2.1.13 Codec Port Interface The TAS1020B provides a configurable full duplex bidirectional serial interface that can be used to connect to a codec or other external device types for streaming USB isochronous data. The interface can be configured to support several different industry standard protocols, including AC '97 1.x, AC '97 2.x, AIC, and I2S. The TAS1020B also has a general-purpose mode to support other protocols. 2.1.14 I2C Interface The I2C interface logic provides a two-wire serial interface that the 8052 MCU can use to access other ICs. The TAS1020B is an I2C master device only and supports single byte or multiple byte read and write operations. The interface can be programmed to operate at either 100 kbps or 400 kbps. In addition, the protocol supports 8-bit or 16-bit addressing for accessing the I2C slave device memory locations. The TAS1020B supports I2C wait states. This means slaves can assert wait state on the I2C bus by pulling the SCL line low. 2.1.15 General-Purpose IO Ports (GPIO) The TAS1020B provides two general-purpose IO ports that are controlled by the internal 8052 MCU. The two ports are port 1 and port 3. Port 1 provides true GPIO capability. Each bit of port 1 can be independently used as either an input or output, and consists of an output buffer, an input buffer, and a pullup resistor(4). Some of the bits of port 3 also provide true GPIO capability, but, in addition, some of the bits of port 3 also provide alternate input and output uses. An example of this is P3.2, which is used as the external interrupt (XINT) input to the TAS1020B. A detailed description of the alternate uses of some of the port 3 bits is presented in Section 2.2.11. The pullup resistors for port 1 and port 3 can be disabled by bits P1PUDIS and P3PUDIS respectively in the on-chip register GLOBCTL. In addition, any port 3 pin can be used to wake up the host PC from a low-power suspend mode. 2.1.16 Interrupt Logic The interrupt logic monitors the various conditions that can cause an interrupt and asserts the interrupt 0 (INTO) input on the 8052 MCU core accordingly. All of the TAS1020B internal interrupt sources and the external interrupt (XINT) input are ORed together to generate the INT0 signal. An interrupt vector register is used by the MCU to identify the interrupt source. 2.1.17 Reset Logic An external master reset (MRESET) input signal that is asynchronous to the internal clocks can be used to reset the TAS1020B logic. In addition to this master reset, the TAS1020B logic can also be reset by a USB reset from the host PC if bit FRSTE in the on-chip register USBCTL is set to 1. The TAS1020B also provides a reset output (RSTO) signal that can be used by external devices. This signal is asserted when either a master reset occurs or when a USB reset occurs and FRSTE is set to 1. (4) The pullup resistors are not implemented as true resistors, but rather as switchable current sources (see Section 2.2.11.3). 18 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2 Device Operation The operation of the TAS1020B is explained in the following sections. For additional information on USB, refer to the Universal Serial Bus Specification, Version 1.1. 2.2.1 Clock Generation The TAS1020B requires an external 6-MHz crystal with load capacitors and PLL loop filter components to derive all the clocks needed for both USB and codec operation. Figure 4-1 shows the connection of these components to the TAS1020B. Figure 4-1 also shows a ground shield residing on the top layer of the PCB and underneath the crystal and its load capacitors and the PLL components. The PLL is an analog PLL, and noise pickup in these components can translate to phase jitter at the output of the PLL, which in turn can translate to distortion at the codec. A ground shield is recommended to attenuate the digital noise components on the board as seen at the PLL. The AVSS and AVDD pins on the TAS1020B are used exclusively to power the analog PLL. To maintain isolation from the digital noise residing on a board, AVSS should be a separate ground plane that connects to the primary ground plane (DGND) at a single point via a ferrite bead. The ferrite bead should exhibit around 9 Ω of impedance at 100 MHz. AVDD should also be distinct from DVDD. A recommended architecture is to generate DVDD and AVDD from the same regulator line, with each derived from a RC filter in series with the regulator output. It is finally recommended that the ground shield for the crystal and its load capacitors and the PLL loop filter components be connected to AVSS at a single point via a ferrite bead of the same type as above. Using the low frequency 6-MHz crystal and generating the required higher frequency clocks internally in the TAS1020B is a major advantage with regard to EMI. 2.2.2 Boot Process The TAS1020B can boot from EEPROM or execute a host boot. Host boot will be used in the following circumstances: • No EEPROM is present. • An EEPROM is present, but does not contain a valid header. • An EEPROM is present, but is a device EEPROM (contains header information only). 2.2.2.1 EEPROM Boot Process If the target device has an application EEPROM (an EEPROM that contains both header and application data), and if the header portion of the EEPROM content is valid, the EEPROM application code is downloaded to on-chip RAM. During the download process, the RAM is mapped to data space, and the boot code that orchestrates the download is part of the on-chip firmware housed in on-chip ROM. Also, while the application code is being downloaded, the TAS1020B remains disconnected from the USB bus. When the download is complete, the firmware sets the ROM disable bit SDW. The setting of this bit maps the RAM from data space to program space, starting address 0x0000. Having set bit SDW, the firmware then branches to address 0x0000, which is the reset entry point for the application code. The application code is now running. The application code then switches on the PUR output. The PUR output pin is connected, through external circuitry (see Figure 4-1), to the positive (DP) line of the differential USB bus. Switching PUR on informs the host that a full speed (12 Mb/s) device is present on the bus. In the enumeration procedure that follows, the application code reports its run-time device descriptor set. Following enumeration, the device is actively running its application. 2.2.2.2 Host Boot Process The DFU code in the TAS1020B fully adheres to the USB Device Class Specification for DFU 1.0. In addition, the TAS1020B utilizes the communication protocols from the DFU specification to implement a host boot capability for those applications that do not have an EEPROM resource. In such cases, the Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 19 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com TAS1020B, at power-up, reports its DFU mode descriptor set rather than its run-time descriptor set and directly enters what the DFU specification terms the DFU Program Mode. The host processor must be cognizant of the fact that the device under enumeration does not have an EEPROM resource with valid code, and is already in the DFU mode awaiting a download per the DFU protocol. All of this capability is provided by the ROM-based code (firmware) that resides on the TAS1020B. Specifically, the host boot process addresses three cases—an EPROM is not present, an EEPROM is present but the data in the EEPROM is invalid, or an EEPROM is present but the EEPROM is a device EEPROM (contains only header data). In all three of these cases, the TAS1020B firmware comes up in the DFU Program Mode. A host boot ensues, but the final destination of the download depends on the status of the onboard EEPROM. a. If the firmware determines that no EEPROM is present (by noting, when addressing the EEPROM, the absence of an acknowledge from the EEPROM), a Vendor ID of 0xFFFF and a Product ID of 0xFFFE is reported during enumeration. The download that follows enumeration is written to the on-chip RAM. The download from the host must include a header (see Section 2.2.2.3.1), and the header overwrite bit in the header downloaded must be set to 0. (The header overwrite bit is used to instruct the TAS1020B firmware as to whether or not the header portion of the download is to be written into the EEPROM. Since, in this case, no EEPROM is present, this header overwrite bit must be set to 0). It is noted that the host must have prior knowledge that the target will initialize in the DFU program mode and will require a download of application code (and header) to RAM. b. If the firmware determines that an EEPROM is present (acknowledges are received from the EEPROM), but that the header data in the EEPROM is invalid, a Vendor ID of 0xFFFF and a Product ID of 0xFFFE is reported during enumeration. The download that follows enumeration is written to EEPROM. Since the EEPROM data was invalid, the host has to set the header overwrite bit in the header portion of the download to a 1 to ensure that the header is written to the EEPROM. It is noted that the host must have prior knowledge that the target does have an EEPROM, but that the data in the EEPROM is invalid. This could be a situation such as the initial download of the application on a production line. c. If the firmware determines that an EEPROM is present, that the header data in the EEPROM is valid, but that the header data in the EEPROM indicates that the EEPROM is a device EEPROM, the Vendor ID and Product ID settings in the EEPROM-resident header is reported during enumeration. In addition, the strings in the header, if applicable, are reported. The EEPROM download that follows enumeration will be written to the on-chip RAM facility. In addition to downloading the application code to RAM, an option also exists to download the header portion of the download image to the EEPROM. If the host does not wish to overwrite the valid header data in the EEPROM, it must set the header overwrite bit in its download header to a 0. It is noted that the host must have knowledge that the target contains an EEPROM, and that the EEPROM is a device EEPROM. 2.2.2.3 EEPROM Data Organization Two types of data can be stored in the EEPROM—header data, which contains USB device information, and application code. During boot, if no header or invalid header data is found in the EEPROM, paragraph (b) in Section 2.2.2.2 applies. During boot, if a valid header is found in the EEPROM, and the header indicates that the Data Type is an Application, then the application is loaded from the EEPROM and execution is passed to it. During boot, if a valid header is found in the EEPROM, and the header indicates that the Data Type is a Device, then paragraph (c) in Section 2.2.2.2 applies. 2.2.2.3.1 EEPROM Header Table 2-1 shows the format and information contained it the header data. As seen from Table 2-1, the header data begins at address 0x0000 in the EEPROM and precedes the application code. 20 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Table 2-1. EEPROM Header OFFSET TYPE SIZE VALUE 0 headerChksum 1 Header check sum—derived by adding the header data, excluding the header checksum, in bytes, and retaining the lower byte of the sum as the checksum. 1 HeaderSize 1 Size, in units of bytes, of the header including strings if applied 2 Signature 2 Signature: 0x1234 4 VendorID 2 USB Vendor ID 6 ProductID 2 USB Product ID 8 ProductVersion 1 Product version 9 FirmwareVersion 1 Firmware version USB attributes: Bit 0: If set to 1, the header includes all three strings: language, manufacture, and product strings, if set to 0, the header does not include any string. The strings, if present, must 10 UsbAttributes 1 conform to the USB string format per USB spec 1.0 or later. Bit 1 : Not used. Bit 2: If set to 1, the device can be self powered, if set to 0, cannot be self powered. Bit 3: If set to 1, the device can be bus powered, if set to 0, cannot be bus powered. Bits 4 through 7: Reserved 11 MaxPower 1 Maximum power the device needs in units of 2 mA. Device attributes: Bit 0: If set to 1, the CPU clock is 24 MHz, if set to 0, the CPU clock is 12 MHz. Bit 1: If set to 1, the download version of the header will be written into the EEPROM (download target has to be EEPROM). If the header is not to be overwritten, or if the target is 12 Attributes 1 RAM, this bit must be cleared to 0. Bit 2: Not used. Bit 3: If set to 1, the EEPROM can support a 400 kHz I2C bus, if set to 0, the EEPROM cannot support a 400-kHz I2C bus. Bits 4 through 7: Reserved 13 WPageSize 1 Maximum I2C write page size, in units of bytes This value defines if the device is an application EEPROM or a device EEPROM.0x01: 14 DataType 1 Application EEPROM—contains header and application code.0x02: Device EEPROM—contains only header. All other values are invalid. 15 RpageSize 1 Maximum I2C read page size, in units of bytes. If the value is zero, the whole payLoadSize is read in one I2C read setup. 16 payLoadSize 2 Size, in units of bytes, of the application, if using EEPROM as an application EEPROM, otherwise the value is 0. Language string in standard USB string format if applied. If this attribute is applied, the two xxxx Language string 4 attributes that follow must also be applied. If this attribute is not applied, the following two attributes cannot be applied. xxxx Manufacture ... Manufacture string in standard USB string format if applied. string xxxx Product string ... Product string in standard USB string format if applied. xxxx Application Code ... Application code if applied The header checksum is used by the firmware to detect the presence of a valid header in the EEPROM. The header size field supports future updates of the header. 2.2.2.3.2 Application Code Application code is stored as a binary image in the EEPROM following the header information. The binary image must always be mapped to MCU program space starting at address 0x0000, and must be stored in the EEPROM as a continuous linear block of data. 2.2.2.4 I2C Serial EEPROM The TAS1020B accesses the EEPROM via an I2C serial bus. Thus the EEPROM must be an I2C serial EEPROM. The ROM boot loader assumes the EEPROM device uses the full 7-bit I2C device address with the upper four bits of the address (control code) set to 1010 and the three least significant bits (chip select bits) set to 000. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 21 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 2.2.2.5 DFU Upgrade Process DFU compliance provides a host the capability of upgrading application code currently residing in a target's onboard EEPROM memory. The DFU upgrade process provided by the TAS1020B fully conforms to the requirements specified in USB Device Class Specification For DFU 1.0. The download must consist of both header and application code. The destination of the download must be defined by the on-chip application code (as opposed to the application code being downloaded). Under normal circumstances, the download destination would be EEPROM, but it is possible for the application code to specify on-chip RAM as the download destination. If the download destination is to be EEPROM, bit 1 of the Attribute field in the header data being downloaded determines whether or not the header data in the download image is to be written to the EEPROM. A bit value of 1 results in the header in the EEPROM being overwritten by the header content in the download image. It is important to note that if the application code targets RAM as the download destination, bit 1 in the Attribute field of the download image must be 0. 2.2.2.6 Download Error Recovery Safeguards are incorporated on the TAS1020B ROM to allow recovery from a host download that does not complete due to a loss of power. Before downloading the application code, the TAS1020B saves the value of the Data Type field in the EEPROM header and modifies the Data Type field to indicate that a download is in progress (0x03: Updating). After successful completion of the download, the TAS1020B restores the saved value in the Data Type field. If the download is terminated prior to successful completion, the Data Type field still indicates that a download is in progress. In the case of an unsuccessful download the TAS1020B reboots as a DFU device in DFU Program mode and uses the Vendor and Product ID from the EEPROM header as the vendor and product ID in its USB device descriptor. The download process consists of the following task flow. 1. Header portion of download is written to EEPROM, if applicable. 2. Header Data Type is retrieved and stored in RAM. 3. Header Data Type is overwritten with a value indicating that a download is in progress. 4. Application portion of download is written to EEPROM (or to RAM). 5. Header Data Type is overwritten with the previously recorded legal value. If the download should terminate during the downloading of the header to EEPROM, the header checksum results in the EEPROM being declared invalid on the next boot of the TAS1020B. If the download should terminate during the downloading of the application code, the Data Type field indicates that a download was in progress and the TAS1020B enters the DFU program mode on the next boot. If the TAS1020B remains powered when a premature termination of a download occurs, the TAS1020B remains in the DFU program mode. In this case, the host can again attempt a download; the TAS1020B does not have to be rebooted. 2.2.2.7 ROM Support Functions To conserve RAM memory resources on the TAS1020B, several USB-specific routines have been included in the firmware resident in the on-chip ROM. The inclusion of these routines frees the application code from having to implement USB-specific code. The tasks provided by the ROM code include: • A USB engine for handling USB control endpoint data transactions and states • USB protocol handlers to support USB Chapter 9 • USB protocol handlers to support USB HID Class • USB protocol handlers to support USB DFU Class 22 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 • USB protocol handlers to support the common features of USB Audio Class commands – Feature Unit: • Set/get volume control • Set/get mute control • Set/get bass control • Set/get treble control – Mixer unit: set/get input/output gain control – End point: set/get the audio streaming endpoint sampling frequency – For unsupported case, the ROM code passes the requests to the application code for processing (). See also Section 5. 2.2.3 USB Enumeration USB enumeration is accomplished by interaction between the host PC and the TAS1020B. As described in Section 2.2.2, the TAS1020B can identify itself as an application device by reporting its application Vendor ID and Product ID, or it can identify itself as a DFU device by reporting a Vendor ID of 0xFFFF and a Product ID of 0xFFFE. If the TAS1020B fails to detect the presence of an EEPROM, or if an EEPROM is present but does not contain a valid header, the Vendor ID of 0xFFFF and Product ID of 0xFFFE are reported. If an EEPROM is present, but contains only valid header data, the Vendor ID and Product ID settings in the EEPROM header are reported, but the TAS1020B firmware comes up as a DFU device in the DFU program mode. If an EEPROM is present, and contains both a valid header and application code, the TAS1020B comes up as an application specific device. For all cases where the TAS1020B comes up in the DFU program mode, once application code has been downloaded, the TAS1020B is reset by a host-issued USB reset. After this reset, the TAS1020B comes up as an application device. When the TAS1020B comes up as an application device, the ROM-resident boot loader retrieves the application code from the EEPROM, if the EEPROM is not a device EEPROM, and then runs the application code. It is the application code that connects the TAS1020B to the USB. During the enumeration that follows connection to the USB, the application code identifies the device as an application specific device and the host loads the appropriate host driver(s). The boot loader and application code both use the CONT, SDW and FRSTE bits to control the enumeration process. • The function connect (CONT) bit is set to a 1 by the MCU to connect the TAS1020B device to the USB. When this bit is set to a 1, the USB DP line pullup resistor (PUR) output signal is enabled. Enabling PUR pulls DP high via external circuitry (see Figure 4-1). (When the TAS1020B powers up, this bit is cleared to a 0 and the PUR output is in the high-impedance state.) This bit is not affected by subsequent USB resets. • The shadow the boot ROM (SDW) bit is set to 1 by the MCU to switch the MCU memory configuration from boot loader mode to normal operating mode. Once set to 1, this bit is not affected by subsequent USB resets. • The function reset enable (FRSTE) bit is set to a 1 by the MCU to enable the USB reset to reset all internal logic including the MCU. However, the shadow the ROM (SDW) and the USB function connect (CONT) bits are not reset. In addition, when the FRSTE bit is set, the reset output (RSTO) signal from the TAS1020B device is active whenever a USB reset occurs. This bit, once set, is not affected by subsequent USB resets. 2.2.4 TAS1020B USB Reset Logic There are two mechanisms provided by the TAS1020B—an external reset MRESET and a USB reset. The reset logic used in the TAS1020B is presented in Figure 2-2. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 23 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com MRESET is a global reset that results in all the TAS1020B logic and the 8052 MCU core being reset. This input to the TAS1020B is typically used to implement a power-on reset at the application of power, but it can also be used with reset pushbutton switches and external circuits to implement global resets at any time. MRESET is an asynchronous reset that must be active for a minimum time period of one microsecond. The TAS1020B can also detect a USB reset condition. When this reset occurs, the TAS1020B responds by setting the function reset (RSTR) bit in the USB status register (USBSTA). However, the extent to which the internal logic is reset depends on the setting of the function reset enable bit (FRSTE) in the USB control register (USBCTL). If the MCU has set FRSTE to 1, incoming USB resets are treated as global resets, with all TAS1020B logic and the 8052 MCU core being reset. However, the shadow the ROM (SDW) and the USB function connect (CONT) bits are not reset. Also, if the USB reset results in a global reset being issued, an interrupt to the 8052 MCU is not generated. But if the MCU has cleared FRSTE, incoming USB resets is treated as interrupts to the MCU (via INT0) if the corresponding function reset bit RSTR in the USB interrupt mask register USBMSK has been set by the MCU. If neither FRSTE or RSTR has been set by the MCU, USB resets have no effect on the TAS1020B, other than resetting the USB serial interface engine (SIE) and the USB buffer manager (UBM) in the TAS1020B. Regardless of the status of FRSTE and bit RSTR in the USB interrupt mask register USBMSK, the function reset bit RSTR in the USB status register USBSTA is always set whenever a USB reset condition is detected. If the USB reset results in the generation of a global reset, the global reset clears the function reset bit RSTR in USBSTA. If, instead, the USB reset results in an interrupt being generated, RSTR in register USBSTA is cleared when the MCU writes to the interrupt vector register VECINT while in the USB reset interrupt service routine (VECINT = 0x17). The TAS1020B has two reset outputs—RSTO and CRESET. RSTO is activated every time MRESET is active, and every time a USB reset occurs and bit FRSTE in the USB control register USBCTL is set. CRESET is typically used as a codec reset. Although labeled a reset line, it has no direct relationship to MRESET or detected USB resets. Instead, it is activated and deactivated when the on-chip 8052 MCU core writes a 0 and a 1, respectively, to the CRST bit in the codec port interface control and status register CPTCTL. 2.2.5 USB Suspend and Resume Modes The TAS1020B can recognize a suspend state. Figure 2-2 shows the logical implementation of the suspend and resume modes in the TAS1020B. The TAS1020B enters a suspend mode if a constant idle state (j state) is observed on the USB bus for a period of 5 ms. USB compliance also requires that a device enter a suspend state, drawing only suspend current from the bus, after no more than 10 ms of bus inactivity, The TAS1020B supports this requirement by creating a suspend interrupt to the on-chip MCU after a suspend condition has been present for 5 ms. Upon receiving this interrupt, the MCU firmware can then take the steps necessary to assure that the device enters a suspend state within the next 5 ms. There are two ways for the TAS1020B device to exit the suspend mode: 1) detection of USB resume signaling and 2) proactively performing a local remote wake-up event. 2.2.5.1 USB Suspend Mode When a suspend condition is detected on the USB, the suspend/resume logic sets the function suspend request bit (SUSR) in the USB status register, resulting in the generation of the function suspend request interrupt SUSR. To enter the low-power suspend state and disable all TAS1020B device clocks, the MCU firmware, upon receiving the SUSR interrupt, must set the idle mode bit (IDL), which is bit 0 in the MCU power control (PCON) register. Setting the IDL bit results in the TAS1020B suspending all internal clocks, including the clocks to the MCU. The MCU thus suspends instruction execution while in the idle mode. The MCU must not set the IDL bit while in the SUSR interrupt service routine (ISR), or while in any other ISR. As described in Section 2.2.5.3, it is intended that the receipt of an INT0 interrupt at the MCU result in exiting the suspend state. But if the MCU has suspended instruction execution while in an ISR, 24 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 subsequent INT0 activity is not recognized, as the MCU is still servicing an interrupt. For this reason then, it is necessary that IDL not be set while processing an ISR. (As described in Section 2.2.5.3, an external wake-up event will resume clocks within the TAS1020B. But even if the clocks to the MCU resume, if the MCU does not recognize INT0, the IDL bit remains set and thus the MCU core itself remains in the suspend state). The SUSR bit is cleared while in the SUSR ISR by writing to the interrupt vector register VECINT. While servicing the SUSR ISR, the VECINT output is 0x16 - the USB function suspend interrupt vector. As shown in Figure 2-2, the occurrence of a write to VECINT, while the USB function suspend interrupt vector is being output, results in clearing bit SUSR of the USB status register. (The data written to VECINT is of no consequence; the clearing action takes place upon decoding the write transaction to VECINT). 2.2.5.2 USB Resume Mode When the TAS1020B is in a suspend state, any non-idle signaling on the USB is detected by the suspend/resume logic and device operation resumes. When the resume signal is detected, the TAS1020B clocks are enabled and the function resume request bit (RESR) is set, resulting in the generation of the function resume request interrupt. The function resume request interrupt to the MCU automatically clears the idle mode bit IDL in the PCON register, and as a result the MCU exits the suspend state and becomes fully functional, with all internal clocks active. After the RETI from the ISR, the next instruction to be executed is the one following the instruction that set the IDL bit. The RESR bit is cleared while in the RESR ISR by writing to the interrupt vector register VECINT. 2.2.5.3 USB Remote Wake-Up Mode The TAS1020B device has the capability to remotely wake up the USB by generating resume signaling upstream, providing the host has granted permission to generate remote wake-ups via a SET_FEATURE DEVICE_REMOTE_WAKEUP control transaction. If remote wakeup capability has been granted, the MCU firmware, upon awakening from a suspend state, has to activate the remote wake-up request bit RWUP in the USB control register USBCTL. Activation of RWUP consists of the MCU firmware writing a 1 followed by a 0 to RWUP. This action creates a pulse, which results in the TAS1020B generating resume signaling upstream by driving a k state (non-idle) onto the USB bus. The USB specification requires that remote wake-up resume signaling not be generated until the suspend state has been active for at least 5 ms. In addition, the specification requires that the remote wake-up resume signaling be generated for at least 1ms but for no more than 15 ms. The 5 ms requirement is met by not entering the suspend mode until an idle state, or j state, is detected, uninterrupted, for 5 ms. The RWUP pulse results in driving a k state onto the USB bus for 1 to 2 ms, and thus the 15 ms requirement is also met. Moreover, if an application wishes to extend the duration of the k state on the USB bus, it need only extend the pulse width of RWUP. The resulting duration of the resume signaling is the duration of the RWUP pulse plus 1 to 2 ms. The condition that activates a remote wake-up is a transition from 1 to 0 on one of the P3 port bits whose corresponding mask bit has been set to zero. (When in the suspend mode, the XINT input is treated as port bit P3.2). As seen in Figure 2-2, the P3 mask register bits are gated with the P3 port input lines from the I/O port cells. The gated P3 port bits are then all ORed together and the output is ANDed with the suspend signal. The output of this logic drives the clock input of a flip-flop, and when the output of this logic transitions from 0 to 1, the flip-flop is set to 1. The setting of this flip-flop to 1 results in the TAS1020B exiting the suspend state and resuming all clocks, including those to the MCU core. The output of this flip-flop is also gated with bit XINTEN in the global control register GLOBCTL, and the output of this gate drives the INT0 interrupt logic. This means that a remote wake-up generates an INT0 interrupt to the MCU only if bit XINTEN has been set. Therefore, before entering a suspend state, the firmware must set XINTEN if remote wake-up capability is to be enabled. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 25 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com The wake-up interrupt is seen by the firmware as an XINT interrupt; that is, the interrupt vector register VECINT has an output value of 0x1F. If the XINT pin is to be used as an event marker during normal operation, and if one of the P3 port bits is to be used for a wake-up interrupt, the firmware must be able to distinguish between a wake-up interrupt and a normal XINT interrupt. One technique would be to examine the state of the IDL bit in the MCU power control register. If this bit is set, the interrupt event is a wake-up interrupt; otherwise, the interrupt is a normal XINT interrupt. If an XINT event should occur during a suspend mode, the event is ignored if the mask bit for P3.2 is set. (During a suspend mode the TAS1020B clocks are disabled, and thus an incoming XINT interrupt event does not propagate through the synchronization logic and activate the MCU INT0 input). 2.2.6 Adaptive Clock Generator (ACG) The adaptive clock generator is used to generate two programmable master clock output signals (MCLKO and MCLKO2) that can be used by the codec port interface and the codec device. Two separate and programmable frequency synthesizers provide the two master clocks. This allows the TAS1020B to support different record and playback rates for those devices that require separate master clocks to implement different rates. For isochronous transactions, the ACG can also support USB asynchronous, synchronous, and adaptive modes of operation. The ACG keeps count of the number of master clock events between USB SOF time marks, and the DCNTX/Y field of the endpoint register IEPDCNTX/Y keeps track of the number of samples received between USB SOF time marks. Synchronous isochronous operation can be accomplished by adjusting one of the two frequency synthesizers until the correct number of master clock events is obtained between USB SOF time marks. Similarly, monitoring the number of samples received between USB SOF events can accommodate adaptive isochronous operation. Here the frequency synthesizer is adjusted to obtain the proper codec output rate for the number of samples received. The TAS1020B can also accommodate asynchronous isochronous operation, and the input MCLKI is provided for this case. For asynchronous isochronous operation, the external clock pin MCLKI is used to derive the data and sync signal to the codec. However, the external clock that provides the input to pin MCLKI, instead of the master clock output (MCLKO or MCLKO2) from the ACG, must also source the codec's MCLK. A block diagram of the adaptive clock generator is shown in Figure 2-1. Each frequency synthesizer circuit generates a programmable clock with a frequency range of 12-25 MHz, and each frequency synthesizer output feeds a divide-by-M-circuit, which can be programmed to divide by 1 to 16. As a result, the frequency range of each master clock is 750 kHz to 25 MHz. Also, the duty cycle of each master clock is 50% for all programmable frequencies (after a possible short, or "runt", initial cycle). As indicated in Figure 2-1, multiplexers precede the master clocks MCLKO and MCLKO2. These multiplexers provide the option of using the output of either frequency synthesizer (after division by the divide-by-M circuit) or the MCLKI input (after division by the divide-by-I circuit) to source each master clock. Each master clock is also assigned its own divide circuit to generate its associated CSCLK. The C-port serial clock (CSCLK) is derived by setting the divide by B value in codec port interface configuration register CPTNCF4 [2:0] and the C-port serial clock 2 (CSCLK2) is derived by setting the divide by B2 value in codec port receive interface configuration register 4 CPTRXCNF4 [2:0]. In addition, although not shown in Figure 2-1, each master clock is assigned its own CSYNC generator, with the length and polarity of each CSYNC separately programmable. 26 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B 6 MHz PLL Frequency Synthesizer Oscillator MCLK0 Divide by M1 1 Frequency Synthesizer Divide by M2 2 Divide by I 4 4 3 ACG1DCTL[7:4] ACG2DCTL[7:4] ACG1DCTL[2:0] ACGCTL[4] ACGCTL[1] ACGCTL[3] ACGCTL[0] 16-Bit Counter ACGCTL[6] ACGCTL[7] MCLK02 ACGCAPH ACGCAPL SOF PSOF MCLKI Divide by B CPTCNF4 [2:0] CSCLK Divide by B2 CPTRXCNF4 [2:0] CSCLK2 TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Figure 2-1. Adaptive Clock Generator Block Diagram The ACG is controlled by the registers shown in Table 2-2. See Section 6.5.3 for details. Table 2-2. AGC Control Registers FUNCTIONAL REGISTER ACTUAL BYTE-WIDE REGISTERS 24-bit frequency register #1 ACG1FRQ2 ACG1FRQ1 ACG1FRQ0 16-bit capture register ACGCAPH ACGCAPL 8-bit synthesizer 1 divider control register ACG1DCTL 8-bit ACG control register ACGCTL 24-bit frequency register #2 ACG2FRQ2 ACG2FRQ1 ACG2FRQ0 8-bit synthesizer 2 divider control register ACG2DCTL The main functional modules of the ACG are described in the following sections. 2.2.6.1 Programmable Frequency Synthesizer The 24-bit ACG frequency register value is used to program the frequency synthesizer, and the value of the frequency register can be updated by the MCU while the ACG is running. The high resolution of each frequency value programmed allows the firmware to adjust the frequency value by +LSB or more to lock onto the USB start-of-frame (SOF) signal and achieve a synchronous mode of operation, a necessity for streaming audio applications. The 24-bit frequency register value is updated and used by the frequency synthesizer only when MCU writes to the ACGFRQ0 register. The proper way to update a frequency value then is to write the least significant byte (ACGFRQ0) last. The frequency resolution of the output master clock depends on the actual frequency being output. In general, the frequency resolution decreases with increasing output frequencies. The clock frequency of the MCLKO output signal is calculated by using the formula: For N ≥ 24 and N < 50, Frequency Synthesizer output frequency = 600/N MHz For N = 50, frequency = 12 MHz Where N is the value in the 24-bit frequency register (ACGFRQ). The value of N can range from 24 to 50. The six most significant bits of the 24-bit frequency register are used to represent the integer portion of N, and the remaining 18 bits of the frequency register are used to represent the fractional portion of N. An example is shown below. Alternatively, with ACGnFRQ considered to be a 24-bit unsigned value: ACGnFRQ = [600 000 000 / output (Hz)] × 218 Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 27 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Where output (Hz) is the output of Frequency Synthesizer n. Example Frequency Register Calculation Suppose the desired MCLKO frequency is 24.576 MHz. Using the above formula, N = 24.4140625 decimal. To determine the binary value to be written to the ACGFRQ register, separately convert the integer value (24) to 6-bit binary and the fractional value (4140625) to 18-bit binary. As a result, the 24-bit binary value is 011000.011010100000000000. The corresponding values to program into the ACGFRQ registers are: ACGFRQ2 = 01100001b = 61h ACGFRQ1 = 10101000b = A8h ACGFRQ0 = 00000000b = 00h Keep in mind that writing to register ACGFRQ0 loads the frequency synthesizer with the new 24-bit value in registers ACGFRQ2, ACGFRQ1, and ACGFRQ0. Example Frequency Resolution Calculation To illustrate the frequency resolution capabilities of the ACG, the next possible higher and lower frequencies for MCLKO can be calculated. To get the next possible higher frequency of MCLKO (24.57600384 MHz), decrease the value of N by 1 LSB. Thus, N = 011000.01 – 10100111 –11111111 binary. To get the next possible lower frequency of MCLKO (24.57599600 MHz), increase the value of N by 1 LSB. Thus, N = 011000.01 – 10101000 – 00000001 binary. For this example with a nominal MCLKO frequency of 24.576 MHz, the frequency resolution is approximately 4 Hz. Table 2-3 lists typically used frequencies and the corresponding ACG frequency register values. Table 2-3. ACG Frequency Registers SYNTHESIZED CLOCK ACG1FRQ2/ ACG1FRQ1/ ACG1FRQ0/ OUTPUT ACG2FRQ2 ACG2FRQ1 ACG2FRQ0 25 MHz 0x60 0 0 24.576 MHz 0x61 0×A8 0x0F 22.579 MHz 0x6A 0x4B 0x20 18.432 MHz 0x82 0x35 0x55 16.934 MHz 0x8D 0xBA 0x09 16.384 MHz 0x92 0x7C 0x00 12.288 MHz 0xC3 0x50 0x00 12 MHz 0xC8 0 0 2.2.6.2 Capture Counter and Register The capture counter and register circuit consists of a 16-bit free running counter which runs at the capture clock frequency. The capture clock source can be selected by programming bits MCLK01S0 and MCLK01S1 in the ACGCTL register. The options are the divided output of frequency synthesizer no. 1, the divided output of frequency synthesizer no. 2, or the divided input clock MCLKI. At each USB start-of-frame (SOF) event or pseudo-start-of-frame (PSOF) event, the capture counter value is stored into the 16-bit capture register. This value is valid until the next SOF or PSOF signal occurs (~1 ms). The MCU 28 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 can read the 16-bit capture register value by reading the ACGCAPH and ACGCAPL registers. Because the counter is a free running counter, and because the count range of the counter extends over several frames before rolling over and beginning the count anew, the capture count values obtained are correlated over several SOF cycles. This attribute is useful should a case ever arise when the MCU fails to read the capture counter after a SOF event, and thus skips an SOF cycle. As shown in Figure 2-1, there is only one capture counter and register, and its capture clock frequency is always the clock selection for MCLKO. This means that MCLKO2 cannot be synchronized to the incoming USB data stream. However, MCLKO2 is intended to support record capability for those cases where record and playback are conducted at different master clock frequencies. Synchronization to the USB bus for record is handled by the handshaking protocol established between the assigned DMA channel and the USB buffer manager (UBM) (see Section 2.2.7.4.1, heading Circular Buffer Operation for Isochronous IN Transactions for more detail). Thus it is not necessary that MCLKO2 itself be synchronized to the USB bus. 2.2.7 USB Transfers The TAS1020B device supports all USB data transfer types: control, bulk, interrupt, and isochronous. In accordance with the USB specification, endpoint zero is reserved for the control endpoint and is bidirectional. In addition to the control endpoint, the TAS1020B is capable of supporting up to 7 IN endpoints and 7 OUT endpoints. These additional endpoints can be configured as bulk, interrupt, or isochronous endpoints. 2.2.7.1 Control Transfers Control transfers are used for configuration, command, and status communication between the host PC and the TAS1020B device. Control transfers to the TAS1020B device use IN endpoint 0 and OUT endpoint 0. The three types of control transfers are control write, control write with no data stage, and control reads. 2.2.7.1.1 Control Write Transfer (Out Transfer) The host PC uses a control write transfer to write data to the USB function. A control write transfer always consists of a setup stage transaction and an IN status stage, and can optionally contain one or more data stage transactions between the setup and status transactions. If the data to be transferred can be contained in the two byte value field of the setup transaction data packet, no data stage transaction is required. If the control information requires the transfer of more than two bytes of data, a control write transfer with data stage transactions will be required. The steps followed for a control write transfer are: Initialization Stage 1. MCU initializes IN endpoint 0 and OUT endpoint 0 by programming the appropriate USB endpoint configuration blocks. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the TOGGLE bit, enabling the endpoint, and clearing the NACK bit for both IN endpoint 0 and OUT endpoint 0. Setup Stage Transaction 1. The host PC sends a setup token followed by the setup data packet addressed to OUT endpoint 0. If the data is received without an error, the USB Buffer Manager (UBM) writes the data to the setup data packet buffer, sets the setup stage transaction (SETUP) bit to a 1 in the USB status register, returns an ACK handshake to the host PC, and asserts the setup stage transaction interrupt. Note that as long as the setup stage transaction (SETUP) bit is set to a 1, the UBM returns a NACK handshake for any data stage or status stage transactions regardless of the endpoint 0 NACK or STALL bit values. 2. The MCU services the interrupt, reads the setup data packet from the buffer, and decodes the command. If the command is not supported or valid, the MCU should set the STALL bit in the OUT endpoint 0 configuration byte and the IN endpoint 0 configuration byte before clearing the setup stage transaction (SETUP) bit. This causes the device to return a STALL handshake for any data stage or status stage transactions. If the command decoded is supported, the MCU clears the interrupt, which Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 29 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com automatically clears the setup stage transaction bit. The MCU also sets the TOGGLE bit in the OUT endpoint 0 configuration byte to a 1. For control write transfers, the PID used by the host for the first OUT data packet is a DATA1 PID and the TOGGLE bit must match. Optional Data Stage Transaction 1. The host PC sends an out token packet followed by a data packet addressed to OUT endpoint 0. If the data packet is received without errors the UBM writes the data to the endpoint buffer, updates the data count value, toggles the TOGGLE bit, sets the NACK bit to a 1, returns an ACK handshake to the host PC, and asserts the endpoint interrupt. 2. The MCU services the interrupt and reads the data packet from the buffer. To read the data packet, the MCU first must obtain the data count value. After reading the data packet, the MCU must clear the interrupt and clear the NACK bit to allow the reception of the next data packet from the host PC. 3. If the NACK bit is set to 1 when the in token packet is received, the UBM simply returns a NAK handshake to the host PC. If the STALL bit is set to 1 when the in token packet is received, the UBM simply returns a STALL handshake to the host PC. If a CRC or bit stuff error occurs when the data packet is received, then no handshake is returned to the host PC. Status Stage Transaction 1. For IN endpoint 0, the MCU clears the data count value to zero, sets the TOGGLE bit to 1, and clears the NACK bit to 0 to enable the data packet to be sent to the host PC. Note that for a status stage transaction a null data packet with a DATA1 PID is sent to the host PC. 2. The host PC sends an IN token packet addressed to IN endpoint 0. After receiving the IN token, the UBM transmits the null data packet to the host PC. If the data packet is received without errors by the host PC, an ACK handshake is returned. Upon receiving the ACK handshake, the UBM toggles the TOGGLE bit, sets the NACK bit to 1, and asserts the endpoint interrupt. 3. If the NACK bit is set to 1 when the IN token packet is received, the UBM simply returns a NAK handshake to the host PC. If the STALL bit is set to 1 when the IN token packet is received, the UBM simply returns a STALL handshake to the host PC. If no handshake packet is received from the host PC then the UBM prepares to retransmit the same data packet again. 2.2.7.1.2 Control Read Transfer (In Transfer) The host PC uses a control read transfer to read data from the USB function. A control read transfer consists of a setup stage transaction, at least one in data stage transaction, and an out status stage transaction. The steps followed for a control read transfer are: Initialization Stage 1. MCU initializes IN endpoint 0 and OUT endpoint 0 by programming the appropriate USB endpoint configuration blocks. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the TOGGLE bit, enabling the endpoint, and clearing the NACK bit for both IN endpoint 0 and OUT endpoint 0. Setup Stage Transaction 1. The host PC sends a setup token followed by the setup data packet addressed to OUT endpoint 0. If the data is received without an error, the UBM writes the data to the setup data packet buffer, sets the setup stage transaction (SETUP) bit to a 1 in the USB status register, returns an ACK handshake to the host PC, and asserts the setup stage transaction interrupt. Note that as long as the setup stage transaction (SETUP) bit is set to a 1, the UBM returns a NACK handshake for any data stage or status stage transactions regardless of the endpoint 0 NACK or STALL bit values. 2. The MCU services the interrupt, reads the setup data packet from the buffer, and decodes the command. If the command is not supported or is not valid, the MCU sets the STALL bit in the OUT endpoint 0 configuration byte and the IN endpoint 0 configuration byte before clearing the setup stage transaction (SETUP) bit. This causes the device to return a STALL handshake for any data stage or 30 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 status stage transactions. If the command decoded is valid and is supported, the MCU clears the interrupt, which automatically clears the setup stage transaction bit. The MCU also sets the TOGGLE bit in the IN endpoint 0 configuration byte to a 1. For control read transfers, the PID used by the host for the first IN data packet is a DATA1 PID. Data Stage Transaction 1. The data packet to be sent to the host PC is written to the IN endpoint 0 buffer by the MCU. The MCU also updates the data count value then clears the IN endpoint 0 NACK bit to a 0 to enable the data packet to be sent to the host PC. 2. The host PC sends an IN token packet addressed to IN endpoint 0. After receiving the IN token, the UBM transmits the data packet to the host PC. If the data packet is received without an error by the host PC, then an ACK handshake is returned. The UBM then toggles the TOGGLE bit, sets the NACK bit to 1, and asserts the endpoint interrupt. 3. The MCU services the interrupt and prepares to send the next data packet to the host PC. 4. If the NACK bit is set to 1 when the IN token packet is received, the UBM simply returns a NAK handshake to the host PC. If the STALL bit is set to 1 when the IN token packet is received, the UBM simply returns a STALL handshake to the host PC. If no handshake packet is received from the host PC, then the UBM prepares to retransmit the same data packet again. 5. MCU continues to send data packets until all data has been sent to the host PC. Status Stage Transaction 1. For OUT endpoint 0, the MCU sets the TOGGLE bit to 1, then clears the NACK bit to a 0 to enable a data packet to be sent by the host PC. Note that for a status stage transaction a null data packet with the DATA1 PID is sent by the host PC. 2. The host PC sends an OUT token packet and the null data packet to OUT endpoint 0. If the data packet is received without an error the UBM updates the data count value, toggles to the TOGGLE bit, sets the NACK bit to a 1, returns an ACK handshake to the host PC, and asserts the endpoint interrupt. 3. The MCU services the interrupt. If the status transaction completed successfully, then the MCU clears the interrupt and clears the NACK bit. 4. If the NACK bit is set to 1 when the OUT token packet is received, the UBM simply returns a NAK handshake to the host PC. If the STALL bit is set to 1 when the OUT token packet is received, the UBM simply returns a STALL handshake to the host PC. If a CRC or bit stuff error occurs when the data packet is received, no handshake is returned to the host PC. 2.2.7.2 Interrupt Transfers The TAS1020B supports interrupt data transfers both to and from the host PC. Devices that need to send or receive a small amount of data with a specified service period should use the interrupt transfer type. IN endpoints 1 through 7 and OUT endpoints 1 through 7 can all be configured as interrupt endpoints. 2.2.7.2.1 Interrupt Out Transaction The steps followed for an interrupt out transaction are: 1. MCU initializes one of the OUT endpoints as an out interrupt endpoint by programming the appropriate USB endpoint configuration block. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the toggle bit, enabling the endpoint, and clearing the NACK bit. 2. The host PC sends an OUT token packet followed by a data packet addressed to the OUT endpoint. If the data is received without an error then the UBM writes the data to the endpoint buffer, updates the data count value, toggles the toggle bit, sets the NACK bit to a 1, returns an ACK handshake to the host PC, and asserts the endpoint interrupt. 3. The MCU services the interrupt and reads the data packet from the buffer. To read the data packet, the MCU must first obtain the data count value. After reading the data packet, the MCU clears the Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 31 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com interrupt and clears the NACK bit to allow the reception of the next data packet from the host PC. 4. If the NACK bit is set to a 1 when the data packet is received, the UBM simply returns a NACK handshake to the host PC. If the STALL bit is set to 1 when the data packet is received, the UBM simply returns a STALL handshake to the host PC. If a CRC or bit stuff error occurs when the data packet is received, no handshake is returned to the host PC. NOTE In double buffer mode for interrupt out transactions, the UBM selects between the X and Y buffer based on the value of the toggle bit. If the toggle bit is a 0, the UBM writes the data packet to the X buffer. If the toggle bit is a 1, the UBM writes the data packet to the Y buffer. When a data packet is received, the MCU determines which buffer contains the data packet by reading the toggle bit. However, when using double buffer mode, the possibility exists for data packets to be received and written to both the X and Y buffer before the MCU responds to the endpoint interrupt. In this case, simply use the toggle bit to determine which buffer contains the data packet does not work. Hence, in double buffer mode, the MCU reads the X buffer NACK bit, the Y buffer NACK bit, and the toggle bit to determine the status of the buffers. 2.2.7.2.2 Interrupt In Transaction The steps followed for an interrupt in transaction are: 1. MCU initializes one of the IN endpoints as an in interrupt endpoint by programming the appropriate USB endpoint configuration block. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the toggle bit, enabling the endpoint, and setting the NACK bit. 2. The data packet to be sent to the host PC is written to the buffer by the MCU. The MCU also updates the data count value and clears the NACK bit to 0 to enable the data packet to be sent to the host PC. 3. The host PC sends an IN token packet addressed to the IN endpoint. After receiving the IN token, the UBM transmits the data packet to the host PC. If the data packet is received without errors by the host PC, an ACK handshake is returned. The UBM then toggles the toggle bit, sets the NACK bit to a 1, and asserts the endpoint interrupt. 4. The MCU services the interrupt and prepares to send the next data packet to the host PC. 5. If the NACK bit is set to a 1 when the in token packet is received, the UBM simply returns a NACK handshake to the host PC. If the STALL bit is set to a 1 when the IN token packet is received, the UBM simply returns a STALL handshake to the host PC. If no handshake packet is received from the host PC, then the UBM prepares to retransmit the same data packet. NOTE In double buffer mode for interrupt IN transactions, the UBM selects between the X and Y buffer based on the value of the toggle bit. If the toggle bit is a 0, the UBM reads the data packet from the X buffer. If the toggle bit is 1, the UBM reads the data packet from the Y buffer. 2.2.7.3 Bulk Transfers The TAS1020B supports bulk data transfers both to and from the host PC. Devices that need to send or receive a large amount of non time-critical data should use the bulk transfer type. IN endpoints 1 through 7 and OUT endpoints 1 through 7 can be configured as bulk endpoints. TAS1020B supports single and double buffering for bulk transfers. 2.2.7.3.1 Bulk Out Transaction Using MCU The steps for a bulk out transaction are as follows: 32 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 1. MCU initializes one of the OUT endpoints as an OUT bulk endpoint by programming the appropriate USB endpoint configuration block. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the toggle bit, enabling the endpoint, and clearing the NACK bit. 2. The host PC sends an OUT token packet followed by a data packet addressed to the OUT endpoint. If the data is received without an error, the UBM writes the data to the endpoint buffer, updates the data count value, toggles the toggle bit, sets the NACK bit to a 1, returns an ACK handshake to the host PC, and asserts the endpoint interrupt. 3. The MCU services the interrupt and reads the data packet from the buffer. To read the data packet, the MCU must first retrieve the data count value. After reading the data packet, the MCU clears the interrupt and clears the NACK bit to allow the reception of the next data packet from the host PC. 4. If the NACK bit is set to 1 when the data packet is received, the UBM simply returns a NACK handshake to the host PC. If the STALL bit is set to 1 when the data packet is received, the UBM simply returns a STALL handshake to the host PC. If a CRC or bit stuff error occurs when the data packet is received, no handshake is returned to the host PC. NOTE In double buffer mode for bulk OUT transactions, the UBM selects between the X and Y buffer based on the value of the toggle bit. If the toggle bit is a 0, the UBM writes the data packet to the X buffer. If the toggle bit is a 1, the UBM writes the data packet to the Y buffer. When a data packet is received, the MCU determines which buffer contains the data packet by reading the toggle bit. However, when using double buffer mode, data packets may be received and written to both the X and Y buffer before the MCU responds to the endpoint interrupt. In this case, simply using the toggle bit to determine which buffer contains the data packet does not work. Hence, in double buffer mode, the MCU reads the X buffer NACK bit, the Y buffer NACK bit, and the toggle bit to determine the status of the buffers. 2.2.7.3.2 Bulk In Transaction Using MCU The steps followed for a bulk in transaction are: 1. MCU initializes one of the IN endpoints as an IN bulk endpoint by programming the appropriate USB endpoint configuration block. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the toggle bit, enabling the endpoint and setting the NACK bit. 2. The data packet to be sent to the host PC is written to the buffer by the MCU. The MCU also updates the data count value then clears the NACK bit to a 0 to enable the data packet to be sent to the host PC. 3. The host PC sends an IN token packet addressed to the IN endpoint. After receiving the IN token, the UBM transmits the data packet to the host PC. If the data packet is received without errors by the host PC, an ACK handshake is returned. The UBM then toggles the toggle bit, sets the NACK bit to a 1, and asserts the endpoint interrupt. 4. The MCU services the interrupt and prepares to send the next data packet to the host PC. 5. If the NACK bit is set to 1 when the in token packet is received, the UBM simply returns a NAK handshake to the host PC. If the STALL bit is set to 1 when the IN token packet is received, the UBM simply returns a STALL handshake to the host PC. If no handshake packet is received from the host PC, the UBM prepares to retransmit the same data packet again. NOTE In double buffer mode for bulk IN transactions, the UBM selects between the X and Y buffer based on the value of the toggle bit. If the toggle bit is a 0, the UBM reads the data packet from the X buffer. If the toggle bit is a 1, the UBM reads the data packet from the Y buffer. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 33 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 2.2.7.3.3 Bulk Out Transaction Through DMA This transaction is used by mass storage class USB applications to move bulk data to an external device via the TAS1020B DMA resources. The difference between MCU-supported bulk transactions and DMA-supported bulk transactions lies in how the data in the assigned out endpoint buffer is distributed to its final destination. Two modes of DMA operation are possible. One mode is a software handshake mode utilizing synchronization communication between the MCU, the USB Buffer Manager (UBM), and an external device. The second mode is a direct exchange mode that bypasses communication with the MCU and directly outputs USB packets to an external device via the DMA resources. Higher bandwidth transactions can be achieved in the direct exchange mode. In both modes, the on-chip C-port is used to output the received bulk data to an external device. To implement DMA-supported transactions, the C-port must be programmed to operate in either a general-purpose (GP) mode or an Audio Codec '97 (AC97) mode. When in the general-purpose mode, SYNC is disabled when there is no valid data in the buffer to be output; in the AC97 mode, the time slot valid bits in the tag field are disabled when there is no valid data in the buffer to be output. Software Handshake Using MCU, UBM, and External Device Bulk data has the lowest priority of all transfers on the USB bus. But when there is little other activity on the USB bus, bulk transfers can achieve significant transfer rates. Bulk transfer rates then can fluctuate greatly, and for this reason it is sometimes necessary to monitor the transfer rate of bulk transfers in order to throttle back the transfer rate when the rate exceeds the bandwidth of the target device. The software handshake mode is provided to enable the implementation of just such a throttling of data. The following steps explain the operation of the software handshake mode. 1. The MCU initializes one of the OUT endpoints as a bulk OUT endpoint by programming the appropriate USB endpoint configuration block. This entails programming the buffer size and buffer base address, selecting the buffer mode, enabling the endpoint interrupt, initializing the toggle bit, enabling the endpoint, and clearing the NACK bit. 2. To configure a given DMA channel to process a given endpoint in a software handshake mode, the MCU must – Enable the handshake mode by setting the HSKEN bit in the DMA channel control register (DMACTL0 and DMACTL1) to 1. In this same register the MCU must also program the USB endpoint direction and endpoint number fields. – Program the DMA current buffer content register (DMABPCT0 and DMABPCT1) with the number of bulk out packets to be handled by the DMA process without MCU intervention once the MCU has invoked the DMA process. – Program the DMA channel time slot assignment register (DMATSH0 and DMATSH1) with the time slot assignments to be supported by the DMA channel and the number of bytes to be transferred for each supported time slot. 3. The MCU must also appropriately configure the C-port. (See Section 2.2.7.4 for more detail on initializing the C-port). Note that if the C-port is placed in mode 0 (general-purpose mode) the CPTBLK bit in the codec port interface configuration register 4 must be set to 1 to assure that SYNC is disabled when there is no valid data in the buffer to be output. 4. Data is now ready to be received. The UBM, after receiving the bulk out packet and placing it in the appropriate buffer, toggles the toggle bit if the double-buffer mode is set, sets the NACK bit to 1, stores the packet data count in the data count register, and issues an interrupt to the MCU. 5. If the external device indicates that it is ready to receive data, the MCU enables the DMA process by setting the DMAEN bit the DMA channel control register (DMACTL0 and DMACTL1). (Handshaking between the MCU and external device will have to have taken place earlier to determine the status of the external device). 6. Once enabled, the DMA engine proceeds to transfer the contents of the buffer(s) to the C-port for transmittal to the external device. Data availability in the buffer(s) is determined by examining the NACK flags - which are set to 1 when data has been received. For the double buffer case, the buffer to 34 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 be used to retrieve data for the C-port is determined by not only examining the NACK flags but also by monitoring the state of the toggle bit. The NACK bit is cleared by the DMA logic (as opposed to the MCU) each time an entire buffer content has been transferred to the C-port via DMA. 7. If the number of bulk out packets to be handled by the DMA process without MCU intervention is greater than one (the number can be as high as 64K packets), multiple buffer writes take place before the DMA process completes. Every time a data packet is written to a given buffer, the UBM generates the MCU endpoint interrupt. If the MCU wishes to remain autonomous to the DMA process, the MCU must mask off the MCU endpoint interrupt (by clearing the OEPIE bit in the USB out configuration register OEPCNFx) before enabling the DMA process. 8. When the DMA process completes, the DMA channel disables itself and issues a DMA0 or a DMA1 interrupt to the MCU. Upon receiving the interrupt, the MCU knows that DMABPCT packets have been sent out to the C-port. The MCU then enables the appropriate endpoint interrupt (if it had been previously masked off). The process is now complete. Direct Exchange Mode This mode offers the highest bandwidth for bulk OUT transactions. The process is almost identical to the software handshake mode, the only difference being that the Direct Exchange mode, once enabled, runs continuously until disabled; whereas the Software handshake mode only remains active for the processing of DMABPCT packets. The Direct Exchange mode is selected by clearing the bit HSKEN in the DMA channel control register (DMACTL0 and DMACTL1). When the MCU enables the DMA process, after appropriately setting up the endpoint configuration registers, the C-port configuration registers, and the DMA channel, the DMA process remains active until disabled by the MCU. While the DMA channel is active, received packets continue to be retrieved from the appropriate endpoint buffer and transferred to the C-port for transmission to the external device. 2.2.7.3.4 Bulk In Transaction Using DMA The TAS1020B does not support BULK IN using the DMA resources. 2.2.7.4 Isochronous Transfers The TAS1020B supports isochronous data transfers both to and from the host PC. Devices that need to send or receive data at a constant rate must use the isochronous transfer type rate if the bandwidth of the data exceeds the USB bandwidth allotted to interrupt type transactions. IN endpoints 1 through 7 and OUT endpoints 1 through 7 can all be configured as isochronous endpoints. Isochronous transfers must include the use of a DMA channel; MCU-supported isochronous transfers are not allowed. Since the TAS1020B has only two DMA channels, at any point in time only two isochronous transactions can be concurrently supported by the TAS1020B. To setup an isochronous IN or an isochronous OUT transaction, the MCU must initialize the appropriate IN or OUT USB endpoint configuration block. For isochronous transactions, this entails programming the buffer size and buffer base address, enabling the endpoint interrupt, setting the ISO bit (to flag that the endpoint is an isochronous endpoint), clearing the NACK bit, and enabling the endpoint. When the ISO bit is set, the hardware configures the buffer to be a single circular buffer (see Section 2.2.7.4.1), using the endpoint buffer size register I/OEPBSIZx and buffer base address register I/O EPBBAXx. The size of the circular buffer is the size specified in I/OEPSIZx. (This is not to be confused with the same value in I/OEPSIZx yielding two buffers of that size when the double buffer mode is selected for control, interrupt, and bulk transactions.) The TAS1020B DMA engine has two DMA channels. Each channel can be assigned to any IN or OUT endpoint that has been configured as an isochronous endpoint. (As previously discussed, DMA channels can also be assigned to bulk out endpoints). If an isochronous OUT endpoint receives data, the DMA channel assigned to the endpoint will retrieve the data from the endpoint buffer and transfer it to the C-port for outputting to the external device. If a DMA channel is assigned to an isochronous IN endpoint, the DMA channel transfers external device data received on the C-port to the IN endpoint buffer. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 35 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Each DMA channel can only implement data flow between endpoint buffers and the C-port. The configuration of each DMA channel includes a 14-bit field that defines which of the up to 14 time slots in the C-port audio frame the DMA channel supports. Both DMA channels could thus service OUT endpoints, or IN endpoints, with each DMA channel supporting different time slots in the audio frame. Each DMA channel also provides a current buffer count register (DMABCNT0/1). For isochronous OUT transactions, the count in the register represents the number of bytes being transferred from the OUT endpoint buffer to the C-port during the current USB frame. A new count is derived at each USB SOF event, and is the value of the write pointer address setting minus the read pointer address setting at the time of the USB SOF event. The MCU can read the content of this register. The steps required to service DMA-supported isochronous transfers are: 1. The MCU initializes an IN or OUT USB endpoint configuration block. This entails programming the buffer size and buffer base address, setting the ISO bit, setting the number of bytes per isochronous channel, clearing the NACK bit, and enabling the endpoint. Because the endpoint is configured as an isochronous endpoint, the buffer configuration parameters are used to implement a circular buffer rather than one or two linear buffers, and the size specified is the size of the single circular buffer. 2. The MCU configures the selected DMA channel. This entails: – Programming registers DMATSH0/1 and DMATSL0/1, which consists of assigning the time slots to be used and the number of bytes to be transferred per time slot. – Programming register DMACTL0/1, which consists of setting the USB endpoint direction, selecting the endpoint number, and setting the DMA channel enable bit DMAEN. 3. The MCU configures the C-port. This entails: – Programming register CPTCNF1, which consists of setting the number of time slots per audio frame and selecting the C-port interface mode (general purpose mode, AIC mode, etc.). – Programming register CPTCNF2, which consists of setting the length of time slot 0 (number of CSCLK serial clock cycles), setting the length of the remaining time slots (which are all the same in length), and setting the number of data bits per time slot. – Programming register CPTCNF3, which consists of: – Setting the state of DDLY. A 1 programs a one CSCLK clock delay on the data output and data input signals with reference to the leading edge of CSYNC. A 0 removes the delay. – Setting the state of TRSEN. A 1 sets the C-port output to the high-impedance state for those time slots that have no valid data. – Setting the state of CSCLKP. A 1 programs the C-port to be CSCLK falling edge active (CDATO and CSYNC transition on falling edge of CSCLK and DATI is sampled on rising edge of CSCLK). A 0 results in activity on the opposite edges of CSCLK. – Setting the state of CSYNCP. A 1 programs CSYNC to be active high. A 0 programs CSYNC to be active low. – Setting the state of CSYNCL. A 1 programs the length of CSYNC to be the same number of CSCLK cycles as time slot 0. A 0 programs CSYNC to be one CSCLK cycle in length. – Setting the state of BYOR. A 1 results in the DMA reversing the byte order in moving data to/from the endpoint buffer. – Setting the state of CSCLKD. A 1 sets the CSCLK port as an input port (TAS1020B receives CSCLK). A 0 sets the CSCLK port as an output port (TAS1020B sources CSCLK). – Setting the state of CSYNCD. A 1 sets the CSYNC port as an input port (TAS1020B receives CSYNC). A 0 sets the CSYNC port as an output port (TAS1020B sources CSYNC). – Programming register CPTCNF4, which consists of: – Specifying the 4-Bit field ATSL. This field defines which time slot is to be used for secondary communication (command/status) address and data. – Setting the state of CPTBLK. When DMA is to be used to transport USB bulk transfers to external devices via the C-port, the C-port must be placed in either a general-purpose mode or an AC '97 mode, and CPTBLK must be set to one. When the C-port is placed in the general-purpose mode, a state of 1 for CPTBLK results in CSYNC only being present when valid data is present in the current frame. When the C-port is placed in the AC '97 mode, a state 36 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 of 1 for CPTBLK results in CSYNC always being present, but the tag bits in time slot 0 being set to indicate the presence or absence of data. When CPTBLK is set to 0, CSYNC and CSCLK are free running once the C-port is enabled. – Specifying the 3-Bit field DIVB. This defines the divide ratio of MCLK to CSCLK. – Programming bits 4-7 of register CPTCTL to enable or disable the C-port transmit and receive interrupts. Bits 1-2 of register CPTCTL are used to select between primary and secondary codecs when using two codecs in the AC '97 mode. Bit 0 of register CPTCTL (CRST), when cleared to 0, is used to issue resets to external devices via the CRESET output pin. NOTE C-port registers CPTADR, CPTDATL, and CPTDATH are accessed during run time operation to set the address, the data, and the mode (receive (status) or command (write)) for secondary communications. Registers CPTVSLL and CPTVSLH are only used when the AC '97 mode is selected and are used to specify which time slots in the audio frame contain valid data. Registers CPTRXCNF2, CPTRXCNF3, and CPTRXCNF4 must be initialized when the C-port is used in the I2S mode (mode 5) to support an ADC and a DAC running at different frequencies. 2.2.7.4.1 Circular Memory Buffer Implementation A significant feature of DMA-supported isochronous transfers is the circular memory structure used to buffer the incoming data. In most applications, the C-port timing is derived from the USB frame rate using a soft-PLL provided in the TAS1020B firmware. However, the USB frame rate can vary within specified boundaries, and the output phase of the PLL can lag (or lead) the input during such variations. If a linear ping pong buffer implementation is used, tolerance must be built into switching between buffers to accommodate all possible magnitudes of variation in the relative timing between the input and output time references. A circular buffer topology greatly simplifies the implementation of the buffer as the need for decision points on when to switch buffers is eliminated. The circular buffer implementation used in TAS1020B utilizes the same endpoint start (I/OEPBBAXx) and size (I/OEPBSIZx) assignment used by the linear buffer implementation, and the size of the circular buffer is the size specified in I/OEPBSIZx. The circular buffer implementation does require the use of two additional registers - a read pointer and a write pointer. These two registers are controlled by hardware, but are made available to the MCU for debug purposes. Circular Buffer Operation for Isochronous OUT Transactions The operation of the circular buffer for isochronous OUT transactions is as follows. • Initially, the read and write pointers are set in hardware to the OUT endpoint start address. • As the first packet of isochronous data addressed to the endpoint is received, the UBM stores the data into the circular buffer and updates the value of the write pointer by a count of one for each byte written into the buffer. • As soon as the DMA channel detects that the read and write pointers are not the same value (data is available), the DMA channel could begin immediately retrieving data and outputting it to the C-port. However, the DMA channel waits until the next USB SOF is received. • Once the DMA channel has waited until the next SOF is received, the buffer contains a full packet of data. Upon receiving SOF, the DMA channel further waits until the start of the next C-port frame and then begins transferring the buffered data to the C-port, updating the read pointer by one count for each byte of data transferred. At the C-port the data is output to the external device in accordance with the timing requirements of the external device (8 frames for 8 kHz audio sampling, 48 frames for 48 kHz audio sampling, etc.). The DMA channel continues to retrieve data from the buffer and output it to the C-port, update the read pointer, and check the value of the write pointer. Should the DMA-controlled read pointer value ever equal the value of the UBM-controlled write pointer, the process goes on hold and awaits the next USB SOF, where the process again resumes. When the UBM completes writing a packet of data into the endpoint buffer, it loads the data count Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 37 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com value of that packer (number of data samples, not bytes) into field DCNTX/Y of register OEPDCNTX/Yx. The register chosen, OEPDCNTX or OEPDCNTY, is determined by the LSB of the frame count register USBFNL. An LSB value of 1 chooses OEPDCNTY; a value of 0 chooses OEPDCNTX. This count value does not play a role in implementing the data flow for isochronous out transactions, but is provided for and can be accessed by the MCU. As is discussed in the next section, the counts do play a role in implementing the data flow for isochronous in transactions. • The streaming of audio data via the DMA channel continues indefinitely until the DMA engine is halted by the MCU. Circular Buffer Operation for Isochronous IN Transactions For isochronous out transactions, the handshake implemented between the USB bus and the output device ensures that at each USB SOF event, the output has access to a complete USB frame of data. For isochronous in transactions, the mirror condition must be true: the handshake implemented between the USB bus and the input device must ensure that at each USB SOF event, the UBM has access to one or more complete frames of device data. Isochronous out transactions also ensure, by definition, that a complete USB frame of data is transmitted between USB SOF events. But the mirror condition here is not true, there may not be an integer number of device frames received between USB SOF events. If, at each USB SOF event, the UBM is to have access to one or more complete frames of data from the input device, the latest codec frame available to the UBM has to have completed prior to the USB SOF event. But it is not known when the last input device frame to complete prior to the USB SOF event occurs. Thus a timing mark must be set up to mark the worse case arrival time of the last complete input device frame prior to the USB SOF event. The slowest sampling rate supported for an input device is set at 8 kHz (8 kHz audio sampling). At 8 kHz, a frame arrives from the input device every 0.125 milliseconds, which is 1500 12 MHz USB clock periods. Thus a time mark can be set to occur 1500 clock periods before the next USB SOF event. When this time mark occurs, the DMA completes the current input device frame, if a frame is currently being received, and then sets a handshake flag. The DMA also updates the content of register IEPDCNTX/Y with the total number of samples collected since the previous handshake flag was set. When the USB SOF event occurs, the UBM looks at the flag to see if data is available. If data is available, the UBM refers to the count in the register to determine how much data is to be output on the next isochronous in transaction. To accommodate variations in the number of clocks at the output of the soft PLL, with respect to the incoming 12-MHz USB data rate, the time mark count is actually set to 1511, rather than 1500. The extra 11 clock periods assures that the last frame prior to the USB SOF event will have completed. The flag used is the NACK bit in the IEPDCNTX/Y register, and the data count is the 7-bit DCNTX/Y field in the same register. For isochronous in transactions, the register chosen, IEPDCNTX or IEPDCNTY, is also determined by the LSB of the frame count register USBFNL. But in the case of isochronous in transactions, an LSB value of 1 chooses IEPDCNTX and a value of 0 chooses IEPDCNTY. The selection logic for isochronous in transactions then is the reverse of that used for isochronous out transactions. The operation of the circular buffer for isochronous in transactions is as follows. • Initially, the read and write pointers are set in hardware to the IN endpoint start address. At the same time the NACK flags in the IEPDCNTX and IEPDCNTY registers are set to logic 1 and the DCNTX and DCNTY counts are cleared. • As the input device frames are received, they are stored in the circular buffer by the DMA engine. As each byte is stored in the buffer, the DMA engine updates the write pointer by one count, and also keeps count of the number of samples being stored. • When the time mark occurs, marking that there are 1511 USB clock periods remaining until the next USB SOF event occurs, the DMA engine awaits the completion of the current incoming input device frame (if one is currently being received). When the incoming input device frame completes, the DMA engine sets the NACK flag in IEPDCNTX/Y to logic 0 and loads the number of samples received into the DCNTX/Y field of IEPDCNTX/Y. 38 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 • At this time, the DMA engine zeroes its running count of data samples and awaits the next input device frame. For the DMA engine, the process repeats, and at the next time mark, the DMA engine sets the NACK flag in IEPDCNTX/Y to logic 0 and loads the number of samples received into the DCNTX/Y field of IEPDCNTXY. • At the same time that the DMA engine reinitializes itself to receive the next input device frame, the UBM has noted the clearing of the NACK flag in IEPDCNTX/Y. When this occurs, the UBM knows that one or more complete frames reside in the circular buffer, starting at the address pointed to by the read buffer, and that the integer number of frames comprise a total of DCNTX/Y samples. When the USB SOF event occurs, the UBM is thus prepared and can respond to the USB isochronous in transaction when it occurs. As the UBM retrieves data during the isochronous in transaction, it updates the read pointer by one count for each byte retrieved. When DCNTX/Y samples have been output, the NACK bit in IEPDCNTX/Y is set back to logic 1 and the isochronous transaction is terminated. The UBM now awaits the clearing of the NACK bit in IEPDCNTX/Y and the occurrence of the next USB SOF event, at which time the process repeats. The UBM now continues to alternate (ping pong) between the data count and NACK flag value in register IEPDCNTX and the data count and NACK flag value in register IEPDCNTY until the DMA process is terminated by the MCU. • If an isochronous in token is received when there is no new data to be output (the NACK flag bits in both IEPDCNTX and IEPDCNTY registers are at logic 1), the UBM will respond to the isochronous in request with a NULL packet. 2.2.8 Microcontroller Unit The TAS1020B chip contains an 8-bit microcontroller core for control and supervisory functions. The microcontroller core used is based on the industry standard 8052. It is software compatible (including instruction execution times) with the industry standard 8052AH and 8052BH discrete devices, having all their core features plus the additional features corresponding to standard 8052 / 8032 / 80C52BH / 80C32BH / 87C52 parts - except the ONCE mode and program lock are not supported. The MCU core has three 16-bit timer/counter units and a full-duplex serial port (UART). The timer/counter units and the UART are made available via the port 3 bits; thus some of the port 3 bits have dual functionality assignments in accordance with the 80C51 family of microcontrollers (see Section 2.2.11 for more detail on the dual functionality of port 3). 2.2.9 External MCU Mode Operation An external MCU mode of operation is provided for firmware development using an in-circuit emulator (ICE). The external MCU mode is selected by setting pin EXTEN on the TAS1020B high. When the external MCU mode is selected, the internal 8052 MCU core of the TAS1020B is disabled. Also in the external MCU mode, the GPIO ports are used for the external MCU data, address, and control signals. See Section 1.7, Terminal Functions - External MCU Mode, for details. When in the external mode of operation, the external MCU or ICE is able to access the memory mapped IO registers, the USB configuration blocks and the USB buffer space in the TAS1020B. Texas Instruments has developed a TAS1020B evaluation module (EVM) to allow customers to develop application firmware and to evaluate device performance. The EVM board provides a 40-pin dip socket for an ICE and headers to allow expansion of the system in a variety of ways. 2.2.10 Interrupt Logic The 8052 MCU core used in the TAS1020B supports the five standard 8052 MCU interrupt sources. These five standard MCU interrupt sources are timer 0, timer 1, serial port, external 1 (INT1), and external 0 (INT0).The timer 0, timer 1, and serial port interrupts are MCU-internal interrupts, but INT0 and INT1 are external to the MCU core. Figure 2-2 shows the associated interrupt circuitry external to the MCU core, but within the TAS1020B chip. INT0 is input into the MCU core via port 3 bit P3.2, and INT1 is input into the MCU core via port 3 bit P3.3. P3.3 can also be configured, under firmware control, to serve as a general-purpose IO (GPIO) port bit. But the input side of P3.2 must be dedicated to servicing the INT0 function, as all additional interrupt sources from within the TAS1020B device are ORed together to Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 39 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com generate the INT0 signal into port 3, bit P3.2. The other interrupt sources are: the eight USB IN endpoints, the eight USB OUT endpoints, USB function reset, USB function suspend, USB function resume, USB start-of-frame, USB pseudo start-of-frame, USB setup stage transaction, USB setup stage transaction over-write, codec port interface transmit data register empty, codec port interface receive data register full, I2C interface transmit data register empty, I2C interface receive data register full, DMA channel 0, DMA channel 1, and the external interrupt XINT. 40 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B DP DM USB Bus Suspend Counter En clk Decode > 5 ms Reset Reset Counter clk Decode > 2.5 us En Interrupt Vector Reg (VECINT) Logic Interrupts Decode /XINT Int WE D[0:7] NX2 NX1 MCU write to Interrupt Vector Register ”clears” current vector to next vector, or to 24h if no other interrupt pending RST IDL Power Control Register (PCON) USB Interrupt Mask Register (USBMSK) Internal Interrupts (After Masks Applied) Must be programmed to be low level triggered (ITO bit in MCU’s TCON control register = 0), as multiple internal TAS1020B events can occur concurrently . The internal hardware assures that each interrupt remains low until the MCU signals that the interrupt has been serviced. Function Suspend Request Interrupt Function Resume Request Interrupt P3MSK7 P3MSK2 P3MSK0 P3.7−IN P3.6−IN P3.5−IN P3.4−IN P3.3−IN P3.1−IN P3.0−IN P3.7−IN P3.2−IN P3.0−IN USB Reset Interrupt Suspend FRSTE USB Control Register (USBCTL) XINTEN 7 6 5 0 Global Control Register (GLOBCTL) RESR 0 4 5 6 7 Cl Cl Cl Decode Resume Int Decode Suspend Int Decode USB Reset Int USB Status Register (USBSTA) 0 4 5 6 7 0 3 4 5 7 8052 MCU CORE CRST 0 1 7 Suspend Global Reset Codec Port Interface Control and Status Register (CPTCTL) Clear USB Serial Interface Engine (SIE) and USB Buffer Manager (UBM) 7 1 0 PLL SubSystem Turn Off Turn On D Q CL ’1’ P3 Mask Register (P3MSK) 7 6 3 2 1 0 Synchronized XINT Remote ”Wake−Up Interrupt Suspend TAS1020B Clocks Q D Q D Q D Q D 24 MHz Clk Q D CL 24 MHz Clk Set Set Set Q D 48 MHz Clk MRESET RSTO CRESET XINT (P3.2−IN) SUSR RSTR RESR SUSR RSTR TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Figure 2-2. TAS1020B Interrupt, Reset, Suspend, and Resume Logic Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 41 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com The events that trigger the interrupt sources are: • USB OUT endpoint interrupts: these interrupts are issued by the USB Buffer Manager (UBM) whenever a complete data packet has been received and stored in an endpoint buffer. Each endpoint is assigned a dedicated OUT endpoint interrupt. For isochronous transactions, however, OUT endpoint interrupts are not issued. The firmware must clear OUT endpoint interrupts by writing to the interrupt vector register. • USB IN endpoint interrupts: these interrupts are issued by the USB buffer manager (UBM) whenever it receives an ACK handshake packet from the host PC indicating that a data packet sent by the UBM was received without error. Each endpoint is assigned a dedicated IN endpoint interrupt. For isochronous transactions, however, IN endpoint interrupts are not issued. The firmware must clear IN endpoint interrupts by writing to the interrupt vector register. • USB function reset interrupt: whenever the host PC issues a USB reset, the bit RSTR in the USB status register USBSTA is set. The setting of this bit causes all of the USB-related logic blocks in the TAS1020B to be reset. If the function reset enable (FRSTE) bit in the USB control register USBCTL is set, the setting of bit RSTR in the USB status register results in a global reset being issued - which resets the MCU core and activates the reset output RSTO. If bit FRSTE is not set, the setting of bit RSTR results in the USB function reset interrupt being issued. If a global reset is issued, it clears the USB status register USBSTA, and thus clears bit RSTR. If a USB function reset interrupt is issued, the interrupt and bit RSTR must be cleared in firmware by writing to the interrupt vector register. • USB function suspend interrupt: whenever the host PC keeps the USB bus in the idle or j state for more than 5 ms, bit SUSR in the USB status register USBSTA is set. This, in turn, results in the activation of the USB function suspend interrupt. The interrupt and bit SUSR must be cleared in firmware by writing to the interrupt vector register. • USB function resume interrupt: whenever a suspend state is active and the host PC resumes activity on the USB bus, bit RESR in the USB status register USBSTA is set. This, in turn, results in the activation of the USB function resume interrupt. The interrupt and bit RESR must be cleared in firmware by writing to the interrupt vector register. • USB start-of-frame interrupt: whenever the TAS1020B detects the reception of a start-of-frame (SOF) packet from the host PC, bit SOF in the USB status register USBSTA is set. This, in turn, results in the activation of the USB start-of-frame interrupt. The interrupt and bit SOF must be cleared in firmware by writing to the interrupt vector register. • USB pseudo start-of-frame interrupt: the TAS1020B employs a counter that runs between USB start-of-frame events, and is cleared upon every reception of a USB SOF event. This counter is included in the TAS1020B to generate pseudo start-of-frame interrupt in case the SOF packet on the USB bus is corrupted. This is done to maintain synchronization to the USB bus and maintain the fidelity any on going streaming audio application. If this count ever reaches a value representative of a time span longer than the 1 ms period of a USB frame, a USB SOF was not received. In such an event, bit PSOF in the USB status register USBSTA is set. This, in turn, results in the activation of the USB pseudo start-of-frame interrupt. The interrupt and bit PSOF must be cleared in firmware by writing to the interrupt vector register. • USB setup stage transaction interrupt: whenever a control transaction is initiated by the host PC, and the setup data packet following the setup token packet is received without error, bit SETUP in the USB status register USBSTA is set. This, in turn, results in the activation of the USB setup stage transaction interrupt. The interrupt and bit SETUP must be cleared in firmware by writing to the interrupt vector register. • USB setup stage transaction overwrite interrupt: the USB 1.1 specification states that should a setup transaction be received before a previously initiated control transaction is complete, the current control transaction must be aborted and the new transaction processed. The USB setup stage transaction interrupt addresses this requirement. The timing conditions under which this interrupt is issued are shown in Figure 2-3. In Figure 2-3, the host has sent two control transactions. Having received the setup data packet of the first transaction without error, the SETUP bit in the USB status register USBSTA is set and the USB setup stage transaction interrupt issued. While the MCU core is still processing the USB setup stage 42 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B SETUP TOKEN PACKET SETUP DATA PACKET ACK PACKET CONTROL TRANSACTION #1 CONTROL TRANSACTION #2 MCU CORE PROCESSING INTERRUPT USB Setup Stage Transaction Overwrite Interrupt USB Setup Stage Transaction Interrupt USB Bus Traffic SETUP Bit In USB Status Register STPOW Bit In USB Status Register SETUP TOKEN PACKET SETUP DATA PACKET ACK PACKET TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 transaction interrupt (as indicated by the set state of the SETUP bit, which the MCU does not clear until exiting the USB setup stage transaction interrupt service routine), the host issues another control transaction. Issuing another USB setup stage transaction interrupt would not be of value, as the MCU is still in the USB setup stage transaction interrupt service routine processing the first control transaction. Thus the USB setup stage transaction overwrite interrupt is used to indicate that a second control transaction has been received while still processing the first control transaction. If a setup data packet is received without error while the SETUP bit is set, the STPOW bit in the USB status register USBSTA is set and the USB setup stage transaction overwrite interrupt is issued. The interrupt and STPOW bit must be cleared in firmware by writing to the interrupt vector register. Figure 2-3. Activation of Setup Stage Transaction Overwrite Interrupt • Codec port interface transmit data register empty interrupt: codec port modes AC '97 and AIC, and the general-purpose codec port mode, all support secondary communication. Both secondary read and secondary write modes are supported. For the write mode (R/W bit in the codec port interface address register CPTADR cleared to logic 0), command/status can be sent to the codec port by the MCU for transmission to the codec. The codec hardware inserts the data into the proper time slot in the codec frame and transmit the data. The MCU writes the command/status data to the codec port interface data register CPTDATL (and register CPTDATH for 16-bit data). The data written by the MCU is not output until the address is written to the codec port interface address register CPTADR. Upon writing the address to CPTADR (and clearing bit R/W), the codec clears the transmit data register empty bit TXE in the codec port interface control and status register CPTCTL to logic 0. The clearing of this bit flags the hardware that new command/status data has been output. When the command/status data is taken by the codec, bit TXE is set to 1, and the codec port interface transmit data register empty interrupt is issued. The firmware must clear this interrupt by writing to the interrupt vector register, but this action does not clear the TXE bit. • Codec port interface receive data register full interrupt: codec port modes AC '97 and AIC, and the general-purpose codec port mode, all support secondary communication. Both secondary read and secondary write modes are supported. For the read mode (R/W bit in the codec port interface address register CPTADR set to logic 1), command/status data received by the codec can be retrieved by the MCU. Upon receiving secondary command/status data, the codec hardware transfers the data to the codec port interface data register CPTDATL (and CPTDATH if 16-bit data is being transferred), sets the receive data register full bit RXF in codec port interface control and status register CPTCTL to logic 1, and issues the codec port interface receive data register full interrupt. When the MCU reads the command/status data, RXF is cleared to 0. The firmware must clear this interrupt by writing to the interrupt vector register, but this action does not clear bit RXF. (Note that all secondary command/status receive transactions take two codec frames to complete. First the MCU writes the address of the command/status data to be read to CPTADR and sets the R/W bit in register CPTADR to logic 1. On the next codec frame, the address is sent to the codec. On the following codec frame, the requested data is output by the codec and received at the TAS1020B codec port.) Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 43 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com • I2C interface transmit data register empty interrupt: whenever the MCU writes to the I2C interface transmit data register I2CDATO, it results in the hardware clearing the transmit data register empty bit TXE in the I2C interface control and status register I2CCTL. When the data byte is output onto the I2C bus, the hardware sets TXE back to logic 1 and the I2C interface transmit data register empty interrupt is issued. The firmware must clear this interrupt by writing to the interrupt vector register, but this action does not clear the TXE bit. • I2C interface receive data register full interrupt: whenever the I2C interface receive data register I2CDATI receives a byte of data off the I2C bus, the hardware sets the receive data register full bit RXF in the I2C interface control and status register I2CCTL and issues the I2C interface receive data register full interrupt. The firmware must clear this interrupt by writing to the interrupt vector register, but this action does not clear the RXF bit. The RXF bit in the I2C interface control and status register I2CCTL is cleared whenever the MCU reads the contents of the I2C interface receive data register I2CDATI. • External interrupt XINT: this interrupt is provided to give a user the ability to issue interrupts from external sources. XINT is logic 0 active. The interrupt is sampled by synchronization logic internal to the TAS1020B, as shown in Figure 2-2. As Figure 2-2 shows, XINT must be remain in an active-low state for at least one period of the 24 MHz clock to assure that the interrupt is recognized. Also, XINT must transition to an inactive state (logic 1) and then transition back to the active state (logic 0) if another XINT interrupt is to be recognized. If XINT remains in the active low state, it does not result in issuing multiple XINT interrupts. The firmware must clear this interrupt by writing to the interrupt vector register. • DMA channel 0 interrupt: this interrupt becomes active only during bulk OUT transactions utilizing DMA channel 0 when the software handshake mode is selected (see Section 2.2.7.3.3). In this mode of operation the programmable variable DMABPCT - registers DMABPCT0 and DMABPCT1 - instructs DMA channel 0 as to how many bulk OUT packets it must handle before ceasing operation and issuing the DMA channel 0 interrupt. The firmware must clear this interrupt by writing to the interrupt vector register. • DMA channel 1 interrupt: this interrupt is identical in operation to the DMA channel 0 interrupt. Note that the same count variable DMABPCT is used for both DMA interrupts. In fact, as described in Section 2.2.12, only one of the two DMA channels can be active when supporting a bulk OUT transaction. - thus the need for only one count variable DMABPCT. The interrupts for the USB IN endpoints and USB OUT endpoints can be masked. An interrupt for a particular endpoint occurs at the end of a successful transaction to that endpoint. A status bit for each IN and OUT endpoint also exists. However, these status bits are read only, and therefore, these bits are intended to be used for diagnostic purposes only. After a successful transaction to an endpoint, both the interrupt and status bit for an endpoint are asserted until the interrupt is cleared by the MCU. The USB function reset, USB function suspend, USB function resume, USB start-of-frame, USB pseudo start-of- frame, USB setup stage transaction, and USB setup stage transaction over-write interrupts can all be masked. A status bit for each of these interrupts also exists. Refer to the USB interrupt mask register and the USB status register for more details. Note that the status bits for these interrupts are read only. For these interrupts, both the interrupt and status bit are asserted until the interrupt is cleared by the MCU. The codec port interface transmit data register empty, codec port interface receive data register full, I2C interface transmit data register empty, and I2C interface receive data register full interrupts can all be masked. A status bit for each of these interrupts also exists. Note that the status bits for these interrupts are read only. However, for these interrupts, the status bits are not cleared automatically when the interrupt is cleared by the MCU. Refer to the codec port interface control and status register CPTCTL and the I2C interface control and status register I2CCTL for more details. The external interrupt input (XINT) is logically ORed with the on-chip interrupt sources. An enable bit exists for this interrupt in the global control register GLOBCTL. This interrupt does not have a status bit. 44 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.11 General-Purpose I/O (GPIO) Ports Figure 2-4 shows the architecture of the MCU port bits in the TAS1020B. There are two GPIO ports visible to external devices - port 1 and port 3. In examining the functionality of these ports two interfaces must be examined - the I/O driver interface provided at the I/O pads of the TAS1020B and the interface provided at the M8052 MCU core. At each I/O pad servicing the GPIO ports, the individual data input (DI) and data output (DO) lines into the pads are combined into one bidirectional external line. Each I/O pad is also assigned a separate enable line EN. When EN is a logic 0 the output driver is enabled, and when EN is a logic 1 the input buffer is enabled. This implementation means that as an output the GPIO pin actively sinks current in the logic 0 state, but drives the logic 1 state through the 100-μa pullup. However, to obtain an acceptable rise time when the output transitions from a logic 0 to a logic 1, the EN signal remains active for two clock periods after the output data transitions from a logic 0 to a logic 1. For two clock periods then the output buffer actively drives the logic 1 output level before yielding to the 100 μa pullup. This implementation also means that to use a GPIO pin as an input, the DO line for that pin must be set to a logic 1 and the external source driving the pin must be able of sinking the 100 μa pullup when driving a logic 0. (Some port 3 bits also require that the alternate output data source be at logic 1 to use the pin as a GPIO input). The TAS1020B global control register has two bits - P1PUDIS and P3PUDIS - that control the enabling and disabling of the 100 μa pullups for port 1 and port 3 respectively. If firmware disables the 100-μA pullups in one of the ports - by setting P1PUDIS or P3PUDIS to logic 1 - then when a port bit is configured as an output, a logic 1 output will transition to a high-impedance state after the two clock delay period has expired. At power-up, and after a global reset, all GPIO pins are configured as input ports with all 100-μA pullups enabled(1). The MCU core implements each GPIO bit using three signals - DI, DO, and EN. For both port 1 and port 3, EN is derived from DO by ANDing DO with a two clock delayed version of DO. This provides a two-clock delay in transitioning EN from a logic 0 to a logic 1 after DO transitions from a logic 0 to a logic 1. It is this circuitry that results in the output buffer in the I/O pad actively driving a logic 1 output for two clock periods before yielding to the 100-μA pullup or transitioning to a high-impedance state. (1) At power-up, GPIO pins P3.0 and P3.1 can initialize as inputs, outputs driven high, or outputs driven low. After MRESET is high and clocks start, P3.0 and P3.1 become inputs. The user's firmware application can then reprogram them as desired. This behavior occurs only at power-up. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 45 Submit Documentation Feedback Product Folder Link(s): TAS1020B Mode 0 Tx Data Send Tx Clk Rx Data Tx Clk (mode 0) UART MCUDO Q MCU Data Out Alternate ADO Data Out MCU Read MCU Bus MCU MCUDI Data In ADI Alternate Data In EN DO DI P3.0 EN DO DI ADO MCUDO MCUDI ADI P3.1 EN DO DI ADO MCUDO MCUDI ADI P3.2 EN DO DI ADO MCUDO MCUDI ADI P3.3 EN DO DI ADO MCUDO MCUDI ADI P3.4 EN DO DI ADO MCUDO MCUDI ADI P3.5 EN DO DI ADO MCUDO MCUDI ADI P3.6 EN DO DI ADO MCUDO MCUDI ADI P3.7 Timer Logic Timer 0 Event Clk Timer 1 Event Clk Timer 1 Gate Q P1.3 Q P1.4 Q P1.5 Q P1.6 Q P1.7 Q P1.2 Q P1.1 Q P1.0 EN EN EN EN EN EN EN EN DO DI DO DI DO DI DO DI DO DI DO DI DO DI DO DI I/O Drivers P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 100 ua P3.1 UART Tx Data (Mode 0) TAS1020B Interrupt Logic On−Chip Interrupts P1PUDIS 0 GLOBCTL Reg Mux TAS1020B Read Pulse Mux TAS1020B Write Pulse Not Used Not Used EXTEN I/O Drivers M8052 MCU CORE TAS1020B P3.0 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua 100 ua Q D Q D MCU Clk Delay Delay Delay Delay Delay Delay Delay Delay D Q D Q MCU Clk UART Rx Data Delay Timer 2 Event Clk Timer 2 Ext. Trigger P3.2 (output only) / XINT UART Tx Data (Mode 0) UART Tx Clk (Mode 0) P3.3 / INT1 / Timer 1 Gate P3.4 / Timer 0 Event P3.5 / Timer 1 Event WR (output only, internal MCU mode only) WRD (input only, external MCU mode only) RD (output only, internal MCU mode only) RRD (input only, external MCU mode only) Not Used Not Used INT0 Not Used INT1 Not Used Not Used WR Not Used RD Not Used MCU Read VREN RESET MCU Read MCU Read MCU Read MCU Read MCU Read MCU Read MCU Read VREN Reset P3PUDIS 7 6 5 4 3 2 1 Tx Data (Mode 0) Tx Data (Mode 0) TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 2-4. GPIO Port 1 and Port 3 Functionality Also, as shown in Figure 2-4, both ports can service logical units internal to the MCU core, as well as service the memory-mapped discrete input and output lines assigned to each port. 46 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.11.1 Port 3 GPIO Bits As illustrated in Figure 2-4, alternative inputs on port 3 are routed directly from the DI input at the MCU core interface to their destination within the MCU core. It is also noted that when the port bit is used as an alternative input, the value of the input can still be read by the MCU. If the port bit is to be used as a general-purpose input, the firmware must make the proper settings so that the alternative logic unit that receives the general-purpose input does not erroneously respond to the input. Each alternative output on port 3 is ANDed with the memory-mapped latch (Special Function Register - SFR) assigned to that port bit, and the result is DO. This means that if the alternate output is to be used, the latch must be set to logic 1. Similarly, if the latch is to be the source for DO, the alternate output must be logic 1. (The MCU core assures that if the logical unit supplying the alternate output is not used, its default state is logic 1). 2.2.11.1.1 UART Alternative Functions Port 3 GPIO bits P3.0 and P3.1, in addition to being able to serve as general-purpose I/O bits, can also serve to implement UART functionality. The UART implemented offers four modes of operation. In mode 0, UART output data is output on port bit P3.0 and the transmit clock (MCU clock/12) is output on port bit P3.1. In modes 1, 2, and 3 UART receive data is input on P3.0 and UART transmit data is output on P3.1. Modes 1, 2, and 3 are then full duplex modes; serial data can be transmitted and received simultaneously. In all four UART modes, transmission is initiated by any instruction that accesses the MCU-core register SBUF. If this register is not written to, the alternate output lines for P3.0 and P3.1 are at their default logic 1 state. P3.0 and P3.1 can then be used as general-purpose outputs if no instructions access register SBUF. The REN bit in the MCU serial port control register SCON enables UART reception if set to logic 1. If REN is cleared to logic 0, using P3.0 as a general-purpose input does not result in erroneous behavior in the UART logic block. P3.1 has no alternative input function, and thus it can be used as a general-purpose input if the latch assigned to that bit is set to logic 1 and no instructions access register SBUF. (P3.0 also requires that its latch be set to logic 1 and that no instructions access register SBUF if it is to be used as a general-purpose input). 2.2.11.1.2 External Interrupts XINT and INT1 The MCU core provides ports for two external interrupts (external to the MCU core) - INT0 and INT1. INT0 is an alternate input for port 3 bit P3.2 and INT1 is an alternate input for port 3 bit P3.3. As seen from both Figure 2-2 and Figure 2-4, INT0 is used to service all TAS1020B internal interrupts as well as the external interrupt XINT. INT1 only services GPIO pin P3.3, and thus can be used as a dedicated interrupt line. Because INT0 services all internal interrupts, the input DI for P3.2 must be dedicated to its alternative input function INT0. Thus P3.2 cannot be used as a general-purpose input. However, if the external interrupt XINT is not required, P3.2 can be used as a general-purpose output. Port 3 bit P3.3 can be used as a general-purpose output, a general-purpose input, or as INT1. This bit can also serve as a gate for timer 1 (see Section 2.2.11.1.3). 2.2.11.1.3 Timer Alternative Functions The MCU core has three 16-bit timer/counter registers: timer 0, timer 1, and timer 2. In the timer mode, the timer/counter register is incremented every MCU machine cycle (MCU clock/12). In the counter mode, the timer/counter register is incremented in response to a falling edge (logic 1 to logic 0 transition) at its assigned port bit input - P3.4 for timer 0, P3.5 for timer 1, and P1.0 for timer 2. To qualify as an event clock in the counter mode, the external source must hold each logic state - logic 1 and logic 0 - for a period of time greater than 12 MCU clock periods. This means that the maximum count rate in the counter mode is MCU clock/24. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 47 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Timer 1 can be gated on and off under external control to facilitate pulse width measurements. The external control is brought in on port 3 bit P3.3, which is the same input that sources the alternate input function INT1. Thus P3.3 can be thought of as having two alternate input functions. The MCU core also provides gating for timer 0 via P3.2. However, the input DI for P3.2 must be dedicated to INT0 so that the internal TAS1020B interrupts can be serviced. As a result, gated timing is not allowed on timer 0. In addition to the external event clock on port 1 bit P1.0, timer 2 has an external trigger input on port 1 bit P1.1 which can be used to either capture the value in the counter when in the counter mode or reload the timer when in the timer mode. If the C/NT bit in the appropriate MCU special function register (SFR) for a given timer is cleared to enable a timer function, or if the timer/counter interrupt is masked off by clearing the appropriate ET bit in the MCU interrupt enable register IE, the corresponding port bit input providing the external event clock can be used as a general-purpose input. For the external trigger input for timer 2, it is necessary to clear bit EXEN2 in the MCU timer/counter 2 control register T2CON if this input is to be used as a general-purpose input. 2.2.11.1.4 MCU Read/Write Pulse Alternate Function The TAS1020B provides the capability of replacing the internal MCU core with an in-circuit emulator (ICE) for firmware development. When in the external MCU mode of operation (EXTEN = 1), port 3 bits P3.7 and P3.6 respectively are used to input the ICE-generated memory read and write pulses so that the ICE can access the memory-mapped resources internal to the TAS1020B (but not those resources internal to the MCU core itself). When in the internal MCU mode, P3.6 and P3.7 output the external memory write and read pulses respectively from the MCU core, and can be used as troubleshooting aids. P3.6 and P3.7 cannot be used as GPIO resources. 2.2.11.2 Port 1 GPIO Bits Port 1 has two bits that have alternate input functionality - P1.0 and P1.1. The alternate function serviced by these inputs is timer 2. P1.0 provides the external event clock for timer 2 and P1.1 provides the external trigger. These alternate functions and the conditions under which these two bits can be used as GPIO bits are discussed in Section 2.2.11.1.3. Port 1 provides no alternate output functionality. 2.2.11.3 Pullup Macro Figure 2-5 shows the equivalent circuit of the pullup "resistor" of the TAS1020B. For use with 3.3-V I/Os only. Figure 2-5. Pull-Up Logic Symbol Table 2-4. Electrical Characteristics of Pullup Resistors(1) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IO Output current VO = 0 V –35.98 –90.67 –197.38 μA FI Input loading factor TAP 1.65 pF FI Input loading factor PWRDN 2.50 SL Cpd Equivalent power dissipation capacitance 0.04 pF (1) When PWRDN = H, the current source is turned off. 48 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.12 DMA Controller The TAS1020B provides two DMA channels for transferring data between the USB endpoint buffers and the codec port interface. The DMA channels are provided to support the streaming of data for USB isochronous or bulk OUT endpoints only. Each DMA channel can be programmed to service one isochronous endpoint. The endpoint number and direction are programmable using the DMA channel control register provided for each DMA channel. For the two AC '97 modes supported by the TAS1020B, one DMA channel can be assigned to support bulk OUT transactions and the second DMA channel assigned to support isochronous IN transactions. An example would be downloading an AC3 file for storage via a bulk OUT transaction while, at the same time, supporting an isochronous recording session. For all formats and protocols other than AC '97, however, if a DMA channel is assigned to support bulk OUT transactions, it can be the only DMA channel active. If, for example, DMA channel 0 is assigned to support bulk OUT transactions in the General Purpose mode, then DMA channel 1 cannot be assigned to support bulk OUT or isochronous transactions. Section 2.2.7.3.3 provides more detail on DMA-supported bulk OUT transactions. The codec port interface time slots to be serviced by a particular DMA channel must also be programmed. For example, an AC '97 mode stereo speaker application uses time slots 3 and 4 for audio playback. Therefore, the DMA channel used to move the audio data to the codec port interface must set time slot assignment bits 3 and 4 to a 1. Each DMA channel is capable of being programmed to transfer data for time slots 0 through 13 using the two DMA channel time slot assignment registers provided for each DMA channel. The number of bytes to be transferred for each time slot is also programmable. The number of bytes used must be set based on the desired audio data format. 2.2.13 Codec Port Interface The codec port interface is a configurable serial interface used to transfer data between the TAS1020B IC and a codec device. The serial protocol and formats supported include AC '97 1.0, AC '97 2.0, and several I2S modes. In addition, a general-purpose mode is provided that can be configured to various user defined serial interface formats. Configuration of the interface is accomplished using the four codec port interface configuration registers: CPTCNF1, CPTCNF2, CPTCNF3, and CPTCNF4. In I2S mode 5, CPTRXCNF2, CPTRXCNF3, and CPTRXCNF4 are used to configure the C-port in the receive direction. See Section 6.5.4 for more details on these registers. The serial interface is a time division multiplexed (TDM) time slot based scheme. The basic format of the serial interface is determined by setting the number of time slots per codec frame and the number of serial clock cycles (or bits) per time slot. The interface in all modes is bidirectional and full duplex. For all modes except the I2S modes, command/status data as well as audio data can be transferred via the serial interface. Transfer of the audio data packets between the USB endpoint data buffers and the codec port interface is controlled by the DMA channels. The source and/or the destination of the command/status address and data values is controlled by the MCU. The features of the codec port interface that can be configured are: • The mode of operation • The number of time slots per codec frame • The number of serial clock cycles for slot 0 • The number of serial clock cycles for all slots other than slot 0 • The number of data bits per audio data time slot • The time slots to be used for command/status address and data • The serial clock (CSCLK) frequency in relation to the codec master clock (MCLK) frequency • The source of the serial clock signal (internally generated or an input from the codec device) Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 49 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com • The source of the codec master clock signal used to generate the internal serial clock signal (internally generated by the ACG or an input to the TAS1020B device) • The polarity, duration, and direction of the codec frame sync signal • The relationship between the codec frame sync signal and the serial clock signal • The relationship between the codec frame sync signal and the serial data signals • The relationship between the serial clock signal and the serial data signals • The use of zero padding or a high-impedance state for unused time slots and/or bits • The byte ordering to be used 2.2.13.1 General-Purpose Mode of Operation In the general-purpose mode the codec port interface can be configured to various user-defined serial interface formats using the pin assignments shown in Table 2-5. This mode gives the user flexibility to configure the TAS1020B to connect to various codecs and DSPs that do not use a standard serial interface format. Table 2-5. Terminal Assignments for Codec Port Interface General-Purpose Mode TERMINAL GENERAL-PURPOSE MODE 0 NO. NAME 35 CSYNC CSYNC I/O 37 CSCLK CSCLK I/O 38 CDATO CDATA0 O 36 CDATI CDATA1 I 34 CRESET CRESET O 32 CSCHNE NC O Serial bus protocols AC '97, AIC, and I2S are specific settings of the programmable parameters offered in the general-purpose mode. The general-purpose mode then can be thought of as the primary mode of the codec interface port, with all other modes being special cases of the general-purpose mode. Figure 2-6, Figure 2-7, and Figure 2-8 show three general-purpose mode codec configuration examples. Figure 2-6 gives the settings required to implement AC '97 1.0, Figure 2-7 gives the settings required to implement AIC, and Figure 2-8 gives the settings required to implement I2S. In all three cases the parameters that define these modes are included in the figures. It should be noted the MODE bits in codec port interface configuration register 1 (CPTCNF1) can be used to specifically select either AC '97 1.0, AIC, or I2S. However, when using the specific mode selections, the firmware still must set all parameters in the codec port interface configuration registers. The MODE bits are used simply to implement mode-specific behavior not covered by the programmable parameters. An example of this would be setting, when in one of the two AC '97 modes, those time slot tag bits in the time slot 0 tag word that correspond to the time slots that have valid data. 50 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.13.1.1 Parameter Assignments - AC '97 1.0 In Figure 2-6, the codec port interface is configured for 13 time slots. The word size for time slot 0 is 16 bits, whereas the word size for all other time slots is 20 bits. Time slots 1 and 2 are used for secondary communication, and, in the example of figure 2-5, time slots 3, 4, 6, 7, 8, and 9 have valid audio data. The sync line CSYNC is programmed to be logic 1 active for the duration of time slot 0. CSYNC and CDATO are programmed to transition on the rising edge of CSCLK, which means that CDATI will be sampled on the falling edge of CSCLK. For the example of Figure 2-6, each audio data word is only 16 bits in length, and the 4 LSBs of the 20-bit data word slot are set to logic 0. Byte order reversal (BYOR) is not set, so the byte ordering of the data as received is preserved - both from the USB bus (OUT transactions) and from the external codec (IN transactions). To conform with AC '97 timing requirements, it is necessary that both transmit and receive data be delayed by one CSCLK clock period with respect to the rising edge of CSYNC. This is accomplished by setting DDLY to logic 1. Lastly, DIVB is programmed to set CSCLK to MSCLK/2. This allows MSCLK to be set at 24.576 MHz and source the oscillator input XTRL_IN on AC '97 compliant codecs. Figure 2-6 also points out that time slot assignments in AC '97 modes need not be the same for input data frames and output data frames. For output data frames (CDATO), the settings in bit fields VTSL(3:7) and VTSL(8:12) define which time slots have valid data. For input data frames (CDATI) the valid time slots are determined from the settings of the time slot valid tag bits in the 16-bit tag word received in time slot 0. The hardware uses these bit settings to extract the valid data from the input data frame and output it, via a DMA channel, to an endpoint buffer resource. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 51 Submit Documentation Feedback Product Folder Link(s): TAS1020B 0 Tag Rdy CSYNC CSCLK CDATO 0 DDLY = 1 CSCLK CDATO D15 0 CSCLKP = 0 CSYNCP = 1 CSYNCL = 1 Time Slot 0 Length = TSL0L = 10b (16 CSCLK Periods) Time Slot Length = TSLL = 011b (20 CSCLK Periods) Data Bits Per Time Slot = BPTSL = 001b (16) Number Of Time Slots = NTSL = 01100b (13) Mode = MODE = 010b (AC’97 1.0 Mode) BYOR = 0 Cmd Time Slot = ATSL = 0001b VTSL(3:7) = 11011b VTSL(8:12) = 11000b CSYNC CDATI CDATO Tag TRSEN = 0 MCLKO (XTL_IN) CSCLK DIVB = 001b Status Addr Cmd Addr 1 Status Data Cmd Data 2 PCM Left PCM Left 3 PCM Rt PCM Rt 4 0 . . . 0 5 PCM Mike PCM Cen 6 PCM L Surr 7 PCM R Surr 8 LFE 9 0 . . . 0 10 0 . . . 0 11 0 . . . 0 12 TS1 1 TS2 2 TS12 12 0 13 ID1 14 ID0 15 D14 1 D13 2 D0 15 0 16 0 17 0 18 0 19 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 2-6. Codec Port Interface Parameters − AC '97 1.0 52 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.13.1.2 Parameter Assignments - AIC Figure 2-7 shows the parametric settings for the AIC mode. In Figure 2-7, the codec port interface is configured for 16 time slots. The word size for all time slots, including time slot 0, is 16 bits. Time slot 0 is the only active audio time slot and time slot 8 is assigned to handle secondary communications. The sync line CSYNC is programmed to be logic 1 active for one CSCLK period. DDLY is set to logic 1, and thus transmit data (CDATO) and receive data (CDATI) are both delayed by one CSCLK period with respect to the rising edge of CSYNC. CSYNC and CDATO are programmed to transition on the rising edge of CSCLK, and consequently CDATI is sampled on the falling edge of CSCLK. Byte order reversal (BYOR) is not set, so the byte ordering of the data as received is preserved - both from the USB bus (OUT transactions) and from the external codec (IN transactions). The 3-state enable (TRSEN) is set, and thus CDATO goes to a high-impedance state during the outputting of non-valid time slots. Lastly, CSCLK is set to MSCLK/8. (This parameter selection is not part of the AIC standard.) AIC requires both input (CDATI) and output (CDATO) audio data reside in time slot 0 and secondary communication information reside in time slot 8. Thus, unlike AC '97, AIC does not require the use of the valid time slot tag bits VTSL as there is no tag word needed to identify which time slots are valid. A unique feature of AIC is the generation of a second CSYNC frame sync pulse within a given frame if a secondary transaction is taking place. If the MCU has not output data requesting a secondary transaction, the second frame sync pulse shown in Figure 2-7 is not generated. Thus without secondary communication there are 256 CSCLK periods between frame sync pulses, and with secondary communication there are 128 CSCLK periods between frame sync pulses. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 53 Submit Documentation Feedback Product Folder Link(s): TAS1020B D15 Data Bits / Time Slot = BPTSL = 001b (16) Time Slot 0 Length = TSL0L = 10b (16) CSYNCL = 0, CSYNCP = 1 CSCLKP = 0 DDLY = 1 BYOR = 0 Time Slot 0 Time Slot 1 Time Slot 7 Time Slot 8 Time Slot 9 Time Slot 14 Time Slot 15 FC CSYNC DAC Data Register W. Data CDATO /Register R. Addr ADC Data Register Read CDATI Data CSCLK CSYNC CDATO or CDATI MCLKO CSCLK DIVB = 111b 1 NOTE: DA = Device Address FC Number of Time Slots = NTSL = 01111b (16) TRSEN = 1 Cmd Time Slot = ATSL = 1000b (8) Mode = MODE = 001b (AIC Mode) D14 D13 D12 D2 D1 D0 DA2 Data Bits / Time Slot = BPTSL = 001b (16) Time Slot Length = TSLL = 001b (16) CSYNCL = 0, CSYNCP = 1 CSCLKP = 0 DDLY = 1 CSCLK CSYNC CDATO or CDATI FC DA1 DA0 RW D2 D1 D0 2 3 4 5 6 7 8 TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 2-7. Codec Port Interface Parameters − AIC 54 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.13.1.3 Parameter Assignments - I2S Figure 2-8 shows the parameter settings for I2S. I2S only uses two time slots. Time slot 0 is used for left channel audio data and time slot 1 is used for right channel audio data. Secondary communication is not allowed in I2S. The sync line CSYNC is programmed to be logic 0 active for the duration of time slot 0. CSYNC and CDATO are programmed to transition on the falling edge of CSCLK, which means that CDATI will be sampled on the rising edge of CSCLK. DDLY is set to logic 1, and thus transmit data (CDATO) and receive data (CDATI) are both delayed one CSCLK period with respect to the falling edge of CSYNC. The time slot length for both time slots is programmed to be 32 bits. I2S does allow the use of different word size lengths, and a word size length of 24 bits is selected for the example in Figure 2-8. Byte order reversal (BYOR) is not set, so the byte ordering of the data as received is preserved. CSCLK is set to MSCLK/4, which is a common ratio for I2S. For example, if 48 kHz audio sampling is used, CSCLK would be 64 × 48 kHz = 3.072 MHz. MCLK then would be 4 × 3.072 MHz 12.288 MHz, which is a standard master clock frequency used by I2S codecs for 48-kHz audio data. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 55 Submit Documentation Feedback Product Folder Link(s): TAS1020B 0 Time Slot 0 Time Slot 1 Time Slot 0 CSYNC CSCLK CDATO or CADTI DDLY = 1 CSYNCL = 1, CSYNCP = 0 CSCLKP = 1 BYOR = 0 TSL0L = 11b (32 CSCLK Periods) TSLL = 101b (32 CSCLK Periods) BPTSL = 100b (24) NTSL = 00001b (2) MCLKO CSCLK DIVB = 011b 0 L23 L22 L21 L20 L1 L0 0 0 0 0 0 0 R23 R22 R21 R20 0R1 R0 0 0 0 0 0 0 L23 L22 Mode = MODE = 100b or 101b (I2S) TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 2-8. Codec Port Interface Parameters – I2S 56 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.13.1.4 Byte Reversal Ordering For all data transactions managed under DMA control, the TAS1020B provides an option to reverse the ordering of the bytes within a data word as received. Byte order reversal, if selected, applies to both DMA channels. If, for example, one DMA channel is used to output audio to a codec and the second DMA channel is used to retrieve record data from a codec, byte reversal is applied to both audio streams. When re-ordering the bytes within an audio data word, both time slot length (TSLL/TSL0L) and data bits per time slot (BPTSL) must be taken into account. As an example consider Figure 2-9. In Figure 2-9 (a) 20-bit data in a 3-byte word is received either over the USB bus (OUT transaction) or from a codec (IN transaction). The byte order of the data as received is little endian, where the least significant byte is placed in the right-most byte position of the word. If BYOR = 1, byte reversal will be performed to yield an output that is big endian in byte order, where the least significant byte is placed in the left-most byte position of the word. However, in examining the byte-order reversed data in Figure 2-9 (b), it is noted that the two nibbles of the most significant byte are switched to prevent a gap in the serial data when output. The TAS1020B automatically performs this nibble reversal based on BPTSL being one nibble less than the time slot in length. a. Audio Word Received by TAS1020B 24 0 0 0 0 0 B19 B16 B15 B9 B8 B7 B1 B0 b. Received Audio Word After Byte Reversal 24 0 B7 B1 B0 B15 B9 B8 B19 B16 0 0 0 0 Figure 2-9. Byte Reversal Example 2.2.13.2 Audio Codec (AC) '97 1.0 Mode of Operation In AC '97 1.0 mode, the codec port interface can be configured as an AC link serial interface to the AC '97 codec device. Refer to the audio codec '97 specification revision 2.2 for additional information. The AC link serial interface is a time division multiplexed (TDM) slot based serial interface that is used to transfer both audio data and command/status data between the TAS1020B IC and the codec device. NO TAG shows the structure of the codec port interface signals for AC '97 1.0. Table 2-6. Terminal Assignments for Codec Port Interface AC '97 1.0 Mode 2 TERMINAL AC '97 VERSION 1.0 MODE 2 NO. NAME 35 CSYNC SYNC O 37 CSCLK BIT_CLK I 38 CDATO SDATA_OUT O 36 CDATI SDATA_IN I 34 CRESET RESET O 32 CSCHNE NC O In this mode, the codec port interface is configured as a bidirectional full duplex serial interface with a fixed rate of 48 kHz. Each 48-kHz frame is divided into 13 time slots, with the use of each time slot predefined by the audio codec AC '97 specification. Each time slot is 20 serial clock cycles in length except for time slot 0, which is only 16 serial clock cycles. The serial clock, which is referred to as the BIT_CLK for AC '97 modes, is set to 12.288 MHz. Based on the length of each slot, there is a total of 256 serial clock cycles per frame at a frequency of 12.288 MHz. As a result the frame frequency is 48 kHz. For the AC '97 modes, the BIT_CLK is input to the TAS1020B device from the codec. The BIT_CLK is Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 57 Submit Documentation Feedback Product Folder Link(s): TAS1020B MCLKO1 CSYNC CSCLK CDATO CDATI CRESET CSCHNE AC97CLK SYNC BIT_CLK SD_IN SD_OUT CRESET TAS1020B AC’97 IC TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com generated by the codec from the master clock (MCLK) input. The codec MCLK input, which can be generated by the TAS1020B device, must be a frequency of 24.576 MHz. The start of each 48-kHz frame is synchronized to the rising edge of the SYNC signal, which is an output of the TAS1020B device. The SYNC signal is driven high each frame for the duration of slot 0. See Figure 2-10 for details on connecting the TAS1020B to a codec device in this mode. Figure 2-10. Connection of the TAS1020B to an AC '97 Codec The AC link protocol defines slot 0 as a special slot called the tag slot and defines slots 1 through 12 as data slots. Slot 1 and slot 2 are used to transfer command and status information between the TAS1020B device and the codec. Slot 1 and slot 2 of the outgoing serial data stream are defined as the command address and command data slots, respectively. These slots are used for writing to the control registers in the codec. Slot 1 and slot 2 of the incoming serial data stream are defined as the status address and status data slots, respectively. These slots are used for reading from the control registers in the codec. Unused or reserved time slots and unused bit locations within a valid time slot are filled with zeros. Since each data time slot is 20 bits in length, the protocol supports 8-bit, 16-bit, 18-bit, or 20-bit data transfers. 2.2.13.3 Audio Codec (AC) '97 2.0 Mode of Operation The basic serial protocol for the AC '97 2.0 mode is the same as the AC '97 1.0 mode. The AC '97 2.0 mode, however, offers some additional features. In this mode, the TAS1020B provides support for multiple codec devices and also on-demand sampling. Table 2-7. Terminal Assignments for Codec Port Interface AC '97 2.0 Mode 3 TERMINAL AC '97 VERSION 2.0 MODE 3 NO. NAME 35 CSYNC SYNC O 37 CSCLK BIT_CLK I 38 CDATO SDATA_OUT O 36 CDATI SDATA_IN I 34 CRESET RESET O 32 CSCHNE SD_IN2 I The TAS1020B can connect directly to two AC '97 codecs. The interconnect for two codecs is shown in Figure 2-11. As noted in Figure 2-11, the support for two codecs only requires the use of one additional pin—CSCHNE (codec port interface secondary channel enable)—and this additional pin allows record transactions to consist of data from two codecs. The two serial data lines from the two codecs to the TAS1020B are ORed together inside the TAS1020B to form one final serial digital data stream. This means that the data output from each codec must reside in different time slots. This also explains why CSCHNE must be grounded when not used, as a floating input could result in unpredictable behavior and corrupt the serial data coming in on the other input pin, SDATA_IN1. AC '97 mode 2.0 also supports on-demand sampling. On-demand sampling is a codec-to-controller 58 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B Secondary MCLKO CSCHNE CRESET CDATI CDATO CSCLK CSYNC AC97CLK CRESET SDATA_OUT SDATA_IN BIT_CLK SYNC AC97CLK CRESET SDATA_OUT SDATA_IN BIT_CLK SYNC AC ’97 IC TAS1020B AC97 or MC97 Primary Serial Input Data TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 signaling protocol that is used to accommodate audio sampling rates that differ from the 48-kHz AC-link serial frame rate. An example would be streaming 44.1 kHz audio across the AC-link. The signaling protocol is implemented using the data request flags SLOTREQ[0-9] residing in SLOT1[2-11] of slot 1 of the AC '97 input frame. An active request (bit request flag = 0) results in data being sent to the codec on the next AC-link frame. The TAS1020B does not support on-demand sampling when used with two codecs. Only one codec using on-demand sampling can be supported by the TAS1020B. Figure 2-11. Connection of the TAS1020B to Multiple AC '97 Codecs 2.2.13.4 Inter-IC Sound (I2S) Modes of Operation The TAS1020B offers two I2S modes of operation, codec port interface mode 4 and codec port interface mode 5. The difference in the I2S modes is the number of serial data outputs and/or serial data inputs supported. For codec port interface mode 4, there is one serial data output (SDOUT1) and two serial data inputs (SDIN1, SDIN2). Hence, mode 4 can be used to connect the TAS1020B device to a codec with one stereo DAC and two ADCs. For codec port interface mode 5, one serial data output (SDOUT1) and one serial data input (SDIN2) are supported, but these data streams can be completely independent as each is assigned its separate sync pulse and bit clock. Mode 5 then can service applications that require different sampling rates for record and playback. Table 2-8 shows the TAS1020B codec terminal assignments and the respective signal names for each of the I2S modes. Figure 2-8 shows the signal waveforms for I2S. Table 2-8. Terminal Assignments for Codec Port Interface I2S Mode 4 and Mode 5 TERMINAL I2S I2S NO. NAME MODE 4 MODE 5 35 CSYNC LRCK O LRCK1 O 37 CSCLK SCLK O SCLK1 O 38 CDATO SDOUT1 O SDOUT1 O 36 CDATI SDIN1 I SDIN2 I 34 CRESET CRESET O SCLK2 O 32 CSCHNE SDIN2 I LRCK2 O Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 59 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com In all I2S modes, the codec port interface is configured as a bidirectional full duplex serial interface with two time slots per frame. The frame sync signal is the left/right clock (LRCK) signal. Time slot 0 is used for the left channel audio data, and time slot 1 is used for the right channel audio data. Both time slots must be set to 32 serial clock (SCLK) cycles in length giving an SCLK-to-LRCK ratio of 64. The serial clock frequency is based on the audio sample rate. For example, when using an audio sample rate (FS) of 48 kHz, the SCLK frequency must be set to 3.072 MHz (64×FS). (Note that the terms codec frame sync, audio sample rate (FS), and LRCK all refer to the same signal.) The LRCK signal has a 50% duty cycle. The LRCK signal is low for the left channel time slot and is high for the right channel time slot. In addition, the LRCK signal is synchronous to the falling edge of the SCLK. Serial data is shifted out on the falling edge of SCLK and shifted in on the rising edge of SCLK. Both for the left channel and the right channel, there is a one-SCLK cycle delay from the edge of LRCK before the most significant bit of the data is shifted out. For the I2S modes of the codec port interface, there is a 24-bit transmit and 24-bit receive shift register for each SDOUT and SDIN signal, respectively. As a result, the interface can actually support 16-bit, 18-bit, 20-bit or 24-bit transfers. The interface pads the unused bits automatically with zeros. The I2S protocol does not provide for command/status data transfers. Therefore, when using the TAS1020B device with a codec that uses an I2S serial interface for audio data transfers, the TAS1020B I2C serial interface can be used for codec command/status data transfers. 2.2.13.4.1 Mapping DMA Time Slots to Codec Port Interface Time Slots for I2S Modes The I2S serial data format uses two time slots (left channel—slot 0, and right channel—slot 1) for each serial data output or input. Because two serial data streams are input into the TAS1020B in I2S mode 4 operation, and since each input stream has its own unique slot 0 and slot 1 assignments associated with its data, the TAS1020B must contend with two slots arriving during time slot 0 and two slots arriving during time slot 1. Mapping is then required to transpose these multiple time slot occurrences to single, unique slot assignments for the DMA channel. Table 2-9 shows the mapping of the codec port interface time slots for each input to their corresponding DMA time slot assignments. As an example, suppose that codec port interface mode 4 is to be used with one serial data output and two serial data inputs. The DMA channel assigned to support the serial data output must have time slot assignment bits 0 and 1 set to 1. The DMA channel assigned to support the two serial data inputs must have time slot assignment bits 0, 1, 2, and 3 set to 1. Table 2-9. SLOT Assignments for Codec Port Interface I2S Mode 4 CODEC PORT INTERFACE DMA CHANNEL(S) SERIAL DATA TIME SLOT NUMBER TIME SLOT NUMBER LEFT CHANNEL RIGHT CHANNEL LEFT CHANNEL RIGHT CHANNEL SDOUT1 0 1 0 1 SDIN1 0 1 0 2 SDIN2 0 1 1 3 Table 2-10. SLOT Assignments for Codec Port Interface I2S Mode 5 CODEC PORT INTERFACE DMA CHANNEL(S) SERIAL DATA TIME SLOT NUMBER TIME SLOT NUMBER LEFT CHANNEL RIGHT CHANNEL LEFT CHANNEL RIGHT CHANNEL SDOUT1 0 1 0 1 SDIN2 0 1 0 1 60 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.13.5 AIC Mode of Operation AIC - audio interface circuit - is a standard adopted by Texas Instruments for interfacing digitized analog data to a TI DSP. The bus is specifically tailored to be compatible with the serial ports supplied with most TI DSP offerings. In later DSP offerings, these ports are referred to as McBSP ports. The AIC standard has four serial interface modes - pulse mode, SPI mode 0, SPI mode 1, and frame mode. The TAS1020B only supports the pulse mode of operation. (The pulse mode is so named because of the one CSCLK period duration of the sync signal). Three options exist for the pulse mode - master (frame sync is sourced by the codec), slave (frame sync is sourced by the TAS1020B), and continuous-transfer master (data is transmitted and received continuously, and frame sync is sourced by the codec). The TAS1020B directly supports the master and slave options. The continuous-transfer master mode option does not allow secondary communication. The AIC standard covers this case by specifying the use of a second data stream, synchronous with CSCLK, to directly program the internal registers of the codec. The TAS1020B has no means of outputting such a second data stream. The TAS1020B then can only support the continuous-transfer master mode option by the use of external logic, whereby the CDATO line can be multiplexed between the AIC data terminal and the direct configuration serial input terminal. Such a solution for implementing the continuous-transfer master mode option does introduce the restriction that audio data and control data cannot be transmitted concurrently. The AIC standard provides two options for requesting secondary communication - asserting an active-high logic level on a separate line (FC) or setting the LSB of the 16-bit data word high. The latter option is only available when the audio consists of 15-bit data words. The TAS1020B only supports the FC option. When the codec port interface is set to the AIC mode, the TAS1020B CSCHNE pin (pin 32) sources FC. Figure 2-7 shows the parameter settings for the AIC master or slave mode, and Section 2.2.13.1.2 provides detail on these settings. Table 2-11 shows the TAS1020B codec terminal assignments and the respective signal names for the AIC mode of operation. Table 2-11. Terminal Assignments for Codec Port Interface AIC Mode 1 TERMINAL AIC NO. NAME 35 CSYNC FS O 37 CSCLK SCLK O 38 CDATO DOUT O 36 CDATI DIN I 34 CRESET RESET O 32 CSCHNE FC O 2.2.13.6 Bulk Mode The TAS1020B supports bulk OUT data transactions through the codec port using one of the two available DMA channels, but the codec port needs to be configured in AC '97 or general-purpose mode to support bulk OUT transactions. AC '97 and the general-purpose mode are the only two modes of operation that support bulk OUT transactions, as these are the only two modes that have mechanisms in place to distinguish when valid data is or is not being output. AC '97 uses tag bits to indicate whether or not data is valid in any given time slot. In the general-purpose mode, no sync pulse is output if no valid data is available to be output. (In both AC '97 and the general-purpose mode, CPTBLK must be set to logic 1 if tag bits or the sync pulse, respectively, are to indicate the presence of valid data). See Section 2.2.7.3.3 for more detail on bulk OUT transactions using one of the two DMA channels. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 61 Submit Documentation Feedback Product Folder Link(s): TAS1020B Data Line Stable: Data Valid Change of Data Allowed SDA SCL TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 2.2.14 I2C Interface The TAS1020B has a bidirectional two-wire serial interface that can be used to access other ICs. This serial interface is compatible with the I2C (Inter IC) bus protocol and supports both 100-kbps and 400-kbps data transfer rates. The TAS1020B does not support all provisions of theI2C specification. The TAS1020B can only serve as a master device on the I2C bus, but as a master device, the TAS1020B does not support a multimaster bus environment (no bus arbitration), but can recognize wait state insertions on the bus. The I2C interface on the TAS1020B is provided to allow access to I2C slave devices, including EEPROMs and codecs. For example, if the application program code is stored in an EEPROM on the PCB, then the MCU downloads the code from the EEPROM to the TAS1020B on-chip RAM using the I2C interface. Another example is the control of a codec device that uses an I2S interface for audio data transfers and an I2C interface for control register read/write access. 2.2.14.1 Data Transfers The two-wire serial interface uses the serial clock signal, SCL, and the serial data signal, SDA. As stated above, the TAS1020B is a master only device, and therefore, the SCL signal is an output only. The SDA signal is a bidirectional signal that uses an open-drain output to allow the TAS1020B to be wire-ORed with other devices that use open-drain or open-collector outputs. All read and write data transfers on the serial bus are initiated by the TAS1020B. The TAS1020B is also responsible for generating the clock signal used for all data transfers. The data is transferred on the bus serially one bit at a time. However, the protocol requires that the address and data be transferred in byte (8-bit) format with the most-significant bit (MSB) transferred first. In addition, each byte transferred on the bus is acknowledged by the receiving device with an acknowledge bit. Each transfer operation begins with the master device driving a start condition on the bus and ends with the master device driving a stop condition on the bus. The timing relationship between the SCL and SDA signals for each bit transferred on the bus is shown in Figure 2-12. As shown, the SDA signal must be stable while the SCL signal is high, which also means that the SDA signal can only change states while the SCL signal is low. Figure 2-12. Bit Transfer on the I2C Bus The timing relationship between the SCL and SDA signals for the start and stop conditions is shown in Figure 2-13. As shown, the start condition is defined as a high-to-low transition of the SDA signal while the SCL signal is high. Also as shown, the stop condition is defined as a low-to-high transition of the SDA signal while the SCL signal is high. 62 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B SDA SCL S Start Condition P Stop Condition S Start Condition MSB Acknowledge Not Acknowledge 9 Clock Pulse For Acknowledge 1 2 8 Data Output By Slave Device Data Output By TAS1020B SDA SDA } } SCL TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Figure 2-13. I2C START and STOP Conditions When the TAS1020B is the device receiving data information, the TAS1020B acknowledges each byte received by driving the SDA signal low during the acknowledge SCL period. During the acknowledge SCL period, the slave device must stop driving the SDA signal. If the TAS1020B is unable to receive a byte, the SDA signal is not driven low and is pulled high external to the TAS1020B device. Also, if the TAS1020B has received the last byte of data, it signals an end of transmission to the slave device by issuing a not acknowledge, rather than an acknowledge, following reception of the last byte. A high during the SCL period indicates a not-acknowledge to the slave device. The acknowledge timing is shown in Figure 2-14. Read and write data transfers by the TAS1020B device can be done using single byte or multiple byte data transfers. Therefore, the actual transfer type used depends on the protocol required by the I2C slave device being accessed. Figure 2-14. TAS1020B Acknowledge on the I2C Bus 2.2.14.2 Single Byte Write As shown is Figure 2-15, a single byte data write transfer begins with the master device transmitting a start condition followed by the I2C device address and the read/write bit. The read/write bit determines the direction of the data transfer. For a write data transfer, the read/write bit must be a 0. After receiving the correct I2C device address and the read/write bit, the I2C slave device responds with an acknowledge bit. Next, the TAS1020B transmits the address byte or bytes corresponding to the I2C slave device internal memory address being accessed. After receiving the address byte, the I2C slave device again responds with an acknowledge bit. Next, the TAS1020B device transmits the data byte to be written to the memory address being accessed. After receiving the data byte, the I2C slave device again responds with an acknowledge bit. Finally, the TAS1020B device transmits a stop condition to complete the single byte data write transfer. Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 63 Submit Documentation Feedback Product Folder Link(s): TAS1020B A6 A5 A4 A3 A2 A1 A0 R/W ACK A7 A6 A5 A4 A3 A2 A1 A0 ACK D7 D6 D5 D4 D3 D2 D1 D0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge I2C Device Address and Read/Write Bit Memory or Register Address Data Byte SDA D7 D6 D1 D0 ACK Stop Condition Acknowledge I2C Device Address and Read/Write Bit Memory or Register Address Last Data Byte A6 A5 A1 A0 R/W ACK A7 A5 A1 A0 ACK D7 D6 D1 D0 ACK Start Condition Acknowledge Acknowledge Acknowledge SDA First Data Byte A6 A4 A3 Other Data Bytes A6 A5 A0 R/W ACK A7 A6 A5 A4 A0 ACK A6 A5 A0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge I2C Device Address and Read/Write Bit Memory or Register Address Data Byte SDA D7 D6 D1 D0 ACK I2C Device Address and Read/Write Bit Repeat Start Condition Not Acknowledge A1 A1 R/W TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 2-15. Single Byte Write Transfer 2.2.14.3 Multiple Byte Write A multiple byte data write transfer is identical to a single byte data write transfer except that multiple data bytes are transmitted by the TAS1020B device to the I2C slave device as shown in Figure 2-16. After receiving each data byte, the I2C slave device responds with an acknowledge bit. Figure 2-16. Multiple Byte Write Transfer 2.2.14.4 Single Byte Read As shown in Figure 2-17, a single byte data read transfer begins with the TAS1020B device transmitting a start condition followed by the I2C device address and the read/write bit. For the data read transfer, both a write followed by a read are actually performed. Initially, a write is performed to transfer the address byte or bytes of the internal memory address to be read. As a result, the read/write bit must be a 0. After receiving the I2C device address and the read/write bit, the I2C slave device responds with an acknowledge bit. Also, after sending the internal memory address byte or bytes, the TAS1020B device transmits another start condition followed by the I2C slave device address and the read/write bit again. This time the read/write bit is a 1 indicating a read transfer. After receiving the I2C device address and the read/write bit the I2C slave again responds with an acknowledge bit. Next, the I2C slave device transmits the data byte from the memory address being read. After receiving the data byte, the TAS1020B device transmits a not-acknowledge followed by a stop condition to complete the single byte data read transfer. Figure 2-17. Single Byte Read Transfer 64 Detailed Description Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B A6 A0 ACK Acknowledge I2C Device Address and Read/Write Bit A6 A0 R/W ACK A4 A0 ACK R/W D7 D0 ACK Start Condition Stop Condition Acknowledge Acknowledge Acknowledge Last Data Byte SDA D7 D6 D1 D0 ACK First Data Byte Repeat Start Condition Not Acknowledge I2C Device Address and Read/Write Bit Memory or Register Address Other Data Bytes A7 A6 A7 TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 2.2.14.5 Multiple Byte Read A multiple byte data read transfer is identical to a single byte data read transfer except that multiple data bytes are transmitted by the I2C slave device to the TAS1020B device as shown in Figure 2-18. Except for the last data byte, the TAS1020B device responds with an acknowledge bit after receiving each data byte. Figure 2-18. Multiple Byte Read Transfer Copyright © 2002–2011, Texas Instruments Incorporated Detailed Description 65 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 3 Electrical Specifications 3.1 Absolute Maximum Ratings(1) over operating temperature range (unless otherwise noted) DVDD Supply voltage range −0.5 to 3.6 V VI Input voltage range 3.3-V TTL/LVCMOS −0.5 V to DVDD + 0.5 V Continuous power dissipation See Section 3.2 TOp Operating free air temperature range 0°C to 70°C TStg Storage temperature range (1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 3.2 Dissipation Ratings PACKAGE TA ≤ 25°C DERATING FACTOR TA = 70°C POWER RATING ABOVE TA = 25°C POWER RATING TQFP 0.923 W 10.256 mW/°C 0.461 W 3.3 Recommended Operating Conditions MIN NOM MAX UNIT DVDD Digital supply voltage 3 3.3 3.6 V AVDD Analog supply voltage 3 3.3 3.6 V VIH High-level input voltage CMOS inputs 0.7 DVDD V VIL Low-level input voltage CMOS inputs 0 0.2 DVDD V VI Input voltage CMOS inputs 0 DVDD V VO Output voltage CMOS inputs 0 DVDD V 3.4 Electrical Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VOH High-level output voltage, GPIO port bits P3 [0-7] IOH = - 4 mA DVDD-0.5 V VOL Low-level output voltage, GPIO port bits P3 [0-7] IOL = 4 mA 0.5 V VOH High-level output voltage, GPIO port bits P1 [0-7] IOH = - 8 mA DVDD-0.5 V VOL Low-level output voltage, GPIO port bits P1 [0-7] IOL = 8 mA 0.5 V IOZ High-impedance output current ± 20 μA Pullup disabled VI = VIL - 20 IIL Low-level input current μA Enabled -100 Pullup disabled VI = VIH 20 IIH High-level input current μA Enabled 20 CPU clock 12 MHz 45.9 mA Digital supply voltage DVDD (3.3 V) CPU clock 24 MHz 50.9 IDD Suspend(1) 196 μA Normal 14.7 mA Analog supply voltage AVDD (3.3 V) Suspend 24 nA (1) In this 196 μA measurement, the bulk of suspend current (190 μA) is delivered to the USB cable through PUR pin. The remaining 6 μA is consumed by the device. As described in section 7.2.3 of USB 1.1 specification, When computing suspend current, the current from VBus through the pullup and pulldown resistors must be included. 66 Electrical Specifications Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B tw(L) XINT tr , tf 90% 10% VO(CRS) VOH VOL DM DP TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 3.5 Timing Characteristics 3.6 Clock and Control Signals over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN MAX UNIT Internal 0.75 25 fMCLKO1 Clock frequency, MCLKO1 CL = 50 pF(1) MHz MCLKI 0.625 25 Internal 0.75 25 fMCLKO2 Clock frequency, MCLKO2 CL = 50 pF(1) MHz MCLKI 0.625 25 fMCLKI Clock frequency, MCLKI See (1) 5 25 MHz tw(L) Pulse duration, XINT low CL = 50 pF 0.2 10 μs (1) Worst case duty cycle is 45/55. Figure 3-1. External Interrupt Timing Waveform 3.7 USB Signals When Sourced by TAS1020B over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN MAX UNIT tr Transition rise time for DP or DM 4 20 ns tf Transition fall time for DP or DM 4 20 ns tRFM Rise/fall time matching (tr / tf) × 100 90% 110% VO(CRS) Voltage output signal crossover 1.3 2 V Figure 3-2. USB Differential Driver Timing Waveform Copyright © 2002–2011, Texas Instruments Incorporated Electrical Specifications 67 Submit Documentation Feedback Product Folder Link(s): TAS1020B tw1(H) tw1(L) tcyc1 tw2(H) tw2(L) tcyc2 BIT_CLK SYNC tsu th BIT_CLK tpd1 SYNC, SD_OUT SD_IN TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 3.8 Codec Port Interface Signals (AC ’97 Modes) TA = 25°C, DVDD = 3.3 V, AVDD = 3.3 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fBIT_CLK Frequency, BIT_CLK See (1) 12.288 MHz tcyc1 Cycle time, BIT_CLK See (1) 81.4 ns tw1(H) Pulse duration, BIT_CLK high See (1) 36 40.7 45 ns tw1(L) Pulse duration, BIT_CLK low See (1) 36 40.7 45 ns fSYNC Frequency, SYNC CL = 50 pF 48 kHz tcyc2 Cycle time, SYNC CL = 50 pF 20.8 μs tw2(H) Pulse duration, SYNC high CL = 50 pF 1.3 μs tw2(L) Pulse duration, SYNC low CL = 50 pF 19.5 μs tpd1 Propagation delay time, BIT_CLK rising edge to SYNC, SD_OUT CL = 50 pF 15 ns tsu Setup time, SD_IN to BIT_CLK falling edge 10 ns th Hold time, SD_IN from BIT_CLK falling edge 10 ns (1) Worst case duty cycle is 45/55. Figure 3-3. BIT_CLK and SYNC Timing Waveforms Figure 3-4. SYNC, SD_IN, and SD_OUT Timing Waveforms 68 Electrical Specifications Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B tsu th SCLK LRCLK, SD_OUT SD_IN tpd tcyc tsu th CSCLK CSYNC, CDATO, CSCHNE, CRESET CDATI tpd tcyc TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 3.9 Codec Port Interface Signals (I2S Modes) over recommended operating conditions (unless otherwise noted) TEST CONDITIONS MIN MAX UNIT fSCLK Frequency, SCLK CL = 50 pF (32)FS (64)FS MHz tcyc Cycle time, SCLK CL = 50 pF(1) 1/(64)FS 1/(32)FS ns tpd Propagation delay, SCLK falling edge to LRCLK and SDOUT CL = 50 pF 15 ns tsu Setup time, SDIN to SCLK rising edge 10 ns th Hold time, SDIN from SCLK rising edge 10 ns (1) Worst case duty cycle is 45/55. Figure 3-5. I2S Mode Timing Waveforms 3.10 Codec Port Interface Signals (General-Purpose Mode) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN MAX UNIT fCSCLK Frequency, CSCLK CL = 50 pF 0.125 25 MHz tcyc Cycle time, CSCLK CL = 50 pF(1) 0.040 8 μs tpd Propagation delay, CSCLK to CSYNC, CDATO, CSCHNE and CRESET CL = 50 pF 15 ns tsu Setup time, CDATI to CSCLK 10 ns th Hold time, CDATI from CSCLK 10 ns (1) The timing waveforms in Figure 3-6 show the CSYNC, CDATO, CSCHNE, and CRESET signals generated with the rising edge of the clock and the CDATI signal sampled with the falling edge of the clock. The edge of the clock used is programmable. However, the timing characteristics are the same regardless of which edge of the clock is used. Figure 3-6. General-Purpose Mode Timing Waveforms Copyright © 2002–2011, Texas Instruments Incorporated Electrical Specifications 69 Submit Documentation Feedback Product Folder Link(s): TAS1020B tw(H) tw(L) tr tf tsu1 tpd1 SCL SDA tsu2 th2 tsu3 tbuf SCL SDA Start Condition Stop Condition SCL 1 2 8 9 SDA OUT SDA IN TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 3.11 I2C Interface Signals over recommended operating conditions (unless otherwise noted) STANDARD FAST MODE PARAMETER MODE UNIT MIN MAX MIN MAX fSCL Frequency, SCL 0 100 0 400 kHz tw(H) Pulse duration, SCL high 4 0.6 μs tw(L) Pulse duration, SCL low 4.7 1.3 μs tr Rise time, SCL and SDA 1000 300 ns tf Fall time, SCL and SDA 300 300 ns tsu1 Setup time, SDA to SCL 250 100 ns tpd1 Propagation delay, SCL to SDA (5-kΩ pullup resistor) 300 500 300 500 ns tbuf Bus free time between stop and start condition 4.7 1.3 μs tsu2 Setup time, SCL to start condition 4.7 0.6 μs th2 Hold time, start condition to SCL 4 0.6 μs tsu3 Setup time, SCL to stop condition 4 0.6 μs CL Load capacitance for each bus line 400 400 pF Figure 3-7. SCL and SDA Timing Waveforms Figure 3-8. Start and Stop Conditions Timing Waveforms Figure 3-9. Acknowledge Timing Waveform 70 Electrical Specifications Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B 24C64 33 28 2 3 4 5 6 7 8 P1.4 P1.3 32 31 30 CDATI CSYNC TEST EXTEN MCLKI PUR DP DM 27 26 29 9 10 11 12 25 1 P1.2 PLLFILO DVSS DVSS TAS1020B P1.5 P1.6 P1.7 CSCHNE 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 PLLFILI XTALI XTALO SCL SDA MCLKO2 MCLKO1 CDATO P1.1 CSCLK P1.0 NC DVDD NC P3.5 P3.4 P3.3 P3.1 P3.0 3.3 VD 3.3 VD 1 μF 3.3 VD 10 k! VCC WP SCL SDA GND A2 3.09 k! 1000 pF 100 pF AGND 3.3 VA 27 pF XTAL 6 MHz 27 pF AGND MCLKO A1 A0 DGND DGND 3.3 VD 2 k! Top Layer Ground Shield Ferrite Bead 9 ! at 100 MHz 20 k! + C1 C5 35 36 34 C3 C2 2 k! C4 Voltage Regulator + 10 μF 16 V C1 0.1 μF C2 0.1 μF DGND C3 0.1 μF C4 0.1 μF 3.3 VD (To TAS1020B Device Only) 1.0 ! 1 μF 16 V + C5 0.1 μF AGND 3.3 VA (To TAS1020B Device Only) 3.3 V DGND 1.0 ! CRESET MRESET RSTO P3.2/XINT RESET VREN DVDD AVDD DVDD DVSS AVSS USB_CONN 27.4 W 27.4 W 15 kW 1.5 kW PN2222A (see Note E) Data– Data+ VCC GND VCC TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 4 Application Information A. If MCLKI and CSCHNE are not used, they must be connected to DGND. B. Capacitors C1, C2, C3, C4, and C5 are as shown to indicate they must be mounted as close to the pins as possible. C. NC on pins 20 and 22 means they must be left unconnected when running in normal mode. D. Crystal load capacitors are shown as 27 pF, but recommendations of crystal manufactures should be followed. E. Q1 and associated circuitry is required for USB back-voltage certification test. Figure 4-1. Typical TAS1020B Device Connections Copyright © 2002–2011, Texas Instruments Incorporated Application Information 71 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 5 8K ROM The 8K ROM is mask-programmed as part of the TAS1020B manufacturing process. The ROM program provides the boot behavior as discussed in Section 2.2.2. It also provides support functions for the user's application. Source for the ROM image is provided in the TAS1020B Firmware Development Kit (http://focus.ti.com/docs/toolsw/folders/print/tas1020fdk.html). 5.1 ROM Errata It is not possible for an application that uses the ROM support functions to stall an invalid control transaction that has a data stage. 72 8K ROM Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6 MCU Memory and Memory-Mapped Registers This section describes the TAS1020B MCU memory configurations and operation. In general, the MCU memory operation is the same as the industry standard 8052 MCU. 6.1 MCU Memory Space The TAS1020B MCU memory is organized into three individual spaces: program memory, external data memory, and internal data memory. All memory resources reside within the TAS1020B; the terms internal and external refer to memory resources internal to and external to the MCU core residing in the TAS1020B. The total address range for the program memory and the external data memory spaces is 64K bytes each. The total address range for the internal data memory is 256 bytes. The actual mapping of physical memory resources into these three individual spaces is dependent on which operating mode is active, boot loader mode or normal mode. The operating mode is determined by the setting of the SDW bit in the MCU memory configuration register. At power turnon, or after a master reset, the SDW bit is reset and the boot loader mode is active. In this mode, and 8K ROM resource within the TAS1020B is mapped to program space beginning at address 0000h. This same 8K ROM is also mapped to program space beginning at address 8000h. The TAS1020B uses the 8K boot ROM as the program memory when in the boot loader mode. The boot ROM program code downloads the application program code from a nonvolatile memory (EEPROM) on the peripheral PCB, and writes the code to a 6K RAM resource internal to the TAS1020B. In the boot loader mode, this 6K RAM resource is mapped to the external data memory space starting at address 0000h. (If a valid EEPROM resource is not available, the TAS1020B initializes in the DFU program mode and requires a download of application code to RAM—see Section 2.2.2.2). After downloading the application program code to the 6K RAM resource, the boot ROM enables the normal operating mode by setting the ROM disable (SDW) bit to enable program code execution from the 6K RAM instead of the boot ROM. In the normal operating mode, the boot ROM is still mapped to program memory space starting at address 8000h, but the 6K RAM resource is now mapped to program memory space beginning at address 0000h. Also, in the normal operating mode, the RAM resource becomes a read-only memory resource that cannot be written to. Refer to Figure 6-1 and Figure 6-2 for details. In the normal operating mode, the external data memory space contains the data buffers for the USB endpoints, the configuration blocks for the USB endpoints, the setup data packet buffer for the USB control endpoint, and memory-mapped registers. The data buffers for the USB endpoints, the configuration blocks for the USB endpoints and the setup data packet buffer for the USB control endpoints are all implemented in RAM, and this RAM resource is separate from the 6K RAM resource used to house the application code. The memory-mapped registers used for control and status registers are implemented in hardware with flip-flops. The data buffers for the USB endpoints total 1304 bytes, the configuration blocks for the USB endpoints total 128 bytes, the setup packet buffer for the USB control endpoint is 8 bytes, and the memory-mapped-register space is 80 bytes. The total external data memory space used for these blocks of memory then is 1520 bytes. 6.2 Internal Data Memory The internal data memory space is a total of 256 bytes of RAM, which includes the 128 bytes of special function registers (SFR) space. The internal data memory space is mapped in accordance with the industry standard 8052 MCU. The internal data memory space is mapped from 00h to FFh with the SFRs mapped from 80h to FFh. The lower 128 bytes are accessible with both direct and indirect addressing. However, the upper 128 bytes, which is the SFR space, is only accessible with direct addressing. Note that the internal data memory space is separate and distinct from the external data memory space, and although both spaces begin at address 0000h, there is no overlap. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 73 Submit Documentation Feedback Product Folder Link(s): TAS1020B Program Memory FFFFh 24K − Reserved A000h 9FFFh Boot ROM (8K) 24K − Reserved 2000h 1FFFh Boot ROM (8K) (Boot loader and library 0000h of USB functions) External Data Memory FFFFh Memory Mapped Registers (80 Bytes) FFB0h FFAFh USB End-Point Configuration Blocks and Buffer Space (1440 Bytes) FA10h FA0Fh 58,000 Bytes − Reserved 1780h 177Fh Code RAM (6016 Bytes) (Read/Write) (Loaded from EEPROM 0000h by boot loader) 8000h 7FFFh TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Figure 6-1. Boot Loader Mode Memory Map 74 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B Program Memory FFFFh 24K − Reserved A000h 9FFFh Boot ROM (8K) 26752 Bytes 0000h External Data Memory FFFFh Memory Mapped Registers (80 Bytes) FFB0h FFAFh USB End-Point Configuration Blocks and Buffer Space (1440 Bytes) FA10h FA0Fh 64016 Bytes − Reserved 1780h 177Fh Code RAM (6016 Bytes) 0000h 8000h 7FFFh (Read/Write) TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Figure 6-2. Normal Operating Mode Memory Map 6.3 External MCU Mode Memory Space When using an external MCU for firmware development, only the USB configuration blocks, the USB buffer space, and the memory-mapped registers are accessible by the external MCU. See Section 6.4 for details. In this mode, only address lines A0 to A10 are input to the TAS1020B device from the external MCU. Therefore, the USB buffer space and the memory-mapped registers in the external data memory space are not fully decoded since all sixteen address lines are not available. Hence, the USB buffer space and the memory-mapped registers are actually accessible at any 2K boundary within the total 64K external data memory space of the external MCU. As a result, when using the TAS1020B in the external MCU mode, nothing can be mapped to the external data memory space of the external MCU except the USB buffer space and the memory-mapped registers of the TAS1020B device. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 75 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.4 USB Endpoint Configuration Blocks and Data Buffer Space 6.4.1 USB Endpoint Configuration Blocks The USB endpoint configuration space contains 16 8-byte blocks that define configuration, buffer location, buffer size, and data count for the 16 (8 input and 8 output) USB endpoints. The MCU, UBM, and DMA all have access to these configuration blocks. Each of the 16 endpoints in the TAS1020B can be configured as a USB pipe endpoint by initializing the block configuration register assigned to each endpoint. The location of the endpoint X and Y data buffers for each endpoint is set by the value programmed into the X and Y buffer base address registers. Base addresses are octet (8-byte) aligned. The size of the X and Y buffers is set by initializing the buffer size register. The size of the X and Y buffers must be greater than or equal to the USB packet size associated with the endpoint. For Isochronous endpoints, the buffer size defines the size of the single circular buffer. For IN transactions, the X and Y data count registers assigned to each endpoint are set by the USB buffer manager (UBM) to register the size of the new data packet just received. For OUT transactions, the X and Y data count registers assigned to each endpoint are set by the DMA logic or the MCU to register the size of the data packet to be output. For control, interrupt, and bulk transactions, the data count is the number of samples per transaction. 6.4.2 Data Buffer Space The endpoint data buffer space (1304 bytes) provides rate buffering between the data traffic on the USB bus and data traffic to and from the codecs attached to the TAS1020B. Buffers are defined in this space by base address pointers and size descriptors in the USB endpoint configuration blocks. The MCU also has access to this space. In order to conserve RAM memory resources on the TAS1020B, several USB-specific routines have been included in the firmware resident in the on-chip ROM. These ROM support functions are detailed in Section 2.2.2.7. To provide temporary variable storage for these ROM support functions, locations FA10h through FA63h (84 bytes) of the 1304 bytes of data buffer space are reserved for use by the ROM support functions. This then leaves 1220 bytes for the endpoint buffer memories, which service applications up to 6 channels, 48 kHz sampling rate with 16 bits per sample or 4 channels, 48-kHz sampling rate with 24 bits per sample. (If the ROM support functions are not used, the entire block of 1304 bytes can be assigned to endpoint buffer memories.) The values entered into the X and Y buffer base address registers are offset addresses. The lower memory address (or Base address) of a given X (Y) buffer is determined by adding the value in the base address register (multiplied by 8) to the base address of the block of memory assigned to the X and Y buffers. For the TAS1020B, this base address is FA10h. However, the base address of the TUSB3200 members of the family of USB streaming audio controllers, of which the TAS1020B is also a member, is F800h. To maintain software compatibility between family members, the value entered into the base address register for the TAS1020B (as well as the other family members) must be the offset from the base address F800h. For example, assume the X buffer for IN endpoint 3 is to be established starting at address FA60h. For the TAS1020B, the offset of this address from the FA10h base address of the block of memory assigned to the X and Y buffers is 50h. Nevertheless, the value entered into the X buffer base address for IN endpoint 3 must be 4Ch, because F800h + 8 × 4Ch = FA60h. 76 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B External Data Memory Memory Mapped Registers (80 Bytes) Endpoint Configuration Blocks (128 Bytes) Setup Data Packet Buffer (8 Bytes) (see Note A) Endpoint Data Buffers (1220 Bytes) FFFFh FFB0h FFAFh FF30h FF2Fh FF28h FF27h FA10h DMA Access DMA Access MCU Access UBM Access FA64h FA63h ROM Support (84 Bytes) TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 A. See Section 6.4.5. Figure 6-3. USB Endpoint Configuration Blocks and Buffer Space Memory Map Table 6-1. USB Endpoint Configuration Blocks Address Map ADDRESS MNEMONIC NAME FFAFh OEPDCNTY0 OUT endpoint 0 - Y buffer data count byte FFAEh Reserved Reserved for future use FFADh OEPBBAY0 OUT endpoint 0 - Y buffer base address byte FFACh Reserved Reserved for future use FFABh OEPDCNTX0 OUT endpoint 0 - X buffer data count byte FFAAh OEPBSIZ0 OUT endpoint 0 - X and Y buffer size byte FFA9h OEPBBAX0 OUT endpoint 0 - X buffer base address byte FFA8h OEPCNF0 OUT endpoint 0 - configuration byte FFA7h OEPDCNTY1 OUT endpoint 1 - Y buffer data count byte FFA6h Reserved Reserved for future use FFA5h OEPBBAY1 OUT endpoint 1 - Y buffer base address byte FFA4h Reserved Reserved for future use FFA3h OEPDCNTX1 OUT endpoint 1 - X buffer data count byte FFA2h OEPBSIZ1 OUT endpoint 1 - X and Y buffer size byte FFA1h OEPBBAX1 OUT endpoint 1 - X buffer base address byte FFA0h OEPCNF1 OUT endpoint 1 - configuration byte FF9Fh OEPDCNTY2 OUT endpoint 2 - Y buffer data count byte FF9Eh Reserved Reserved for future use FF9Dh OEPBBAY2 OUT endpoint 2 - Y buffer base address byte FF9Ch Reserved Reserved for future use FF9Bh OEPDCNTX2 OUT endpoint 2 - X buffer data count byte FF9Ah OEPBSIZ2 OUT endpoint 2 - X and Y buffer size byte FF99h OEPBBAX2 OUT endpoint 2 - X buffer base address byte FF98h OEPCNF2 OUT endpoint 2 - configuration byte FF97h OEPDCNTY3 OUT endpoint 3 - Y buffer data count byte Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 77 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Table 6-1. USB Endpoint Configuration Blocks Address Map (continued) ADDRESS MNEMONIC NAME FF96h Reserved Reserved for future use FF95h OEPBBAY3 OUT endpoint 3 - Y buffer base address byte FF94h Reserved Reserved for future use FF93h OEPDCNTX3 OUT endpoint 3 - X buffer data count byte FF92h OEPBSIZ3 OUT endpoint 3 - X and Y buffer size byte FF91h OEPBBAX3 OUT endpoint 3 - X buffer base address byte FF90h OEPCNF3 OUT endpoint 3 - configuration byte FF8Fh OEPDCNTY4 OUT endpoint 4 - Y buffer data count byte FF8Eh Reserved Reserved for future use FF8Dh OEPBBAY4 OUT endpoint 4 - Y buffer base address byte FF8Ch Reserved Reserved for future use FF8Bh OEPDCNTX4 OUT endpoint 4 - X buffer data count byte FF8Ah OEPBSIZ4 OUT endpoint 4 - X and Y buffer size byte FF89h OEPBBAX4 OUT endpoint 4 - X buffer base address byte FF88h OEPCNF4 OUT endpoint 4 - configuration byte FF87h OEPDCNTY5 OUT endpoint 5 - Y buffer data count byte FF86h Reserved Reserved for future use FF85h OEPBBAY5 OUT endpoint 5 - Y buffer base address byte FF84h Reserved Reserved for future use FF83h OEPDCNTX5 OUT endpoint 5 - X buffer data count byte FF82h OEPBSIZ5 OUT endpoint 5 - X and Y buffer size byte FF81h OEPBBAX5 OUT endpoint 5 - X Buffer Base Address Byte FF80h OEPCNF5 OUT endpoint 5 - configuration byte FF7Fh OEPDCNTY6 OUT endpoint 6 - Y buffer data count byte FF7Eh Reserved Reserved for future use FF7Dh OEPBBAY6 OUT endpoint 6 - Y buffer base address byte FF7Ch Reserved Reserved for future use FF7Bh OEPDCNTX6 OUT endpoint 6 - X buffer data count byte FF7Ah OEPBSIZ6 OUT endpoint 6 - X and Y buffer size byte FF79h OEPBBAX6 OUT endpoint 6 - X buffer base address byte FF78h OEPCNF6 OUT endpoint 6 - configuration byte FF77h OEPDCNTY7 OUT endpoint 7 - Y buffer data count byte FF76h Reserved Reserved for future use FF75h OEPBBAY7 OUT endpoint 7 - Y buffer base address byte FF74h Reserved Reserved for future use FF73h OEPDCNTX7 OUT endpoint 7 - X buffer data count byte FF72h OEPBSIZ7 OUT endpoint 7 - X and Y buffer size byte FF71h OEPBBAX7 OUT endpoint 7 - X buffer base address byte FF70h OEPCNF7 OUT endpoint 7 - configuration byte FF6Fh IEPDCNTY0 IN endpoint 0 - Y buffer data count byte FF6Eh Reserved Reserved for future use FF6Dh IEPBBAY0 IN endpoint 0 - Y buffer base address byte FF6Ch Reserved Reserved for future use FF6Bh IEPDCNTX0 IN endpoint 0 - X buffer data count byte FF6Ah IEPBSIZ0 IN endpoint 0 - X and Y buffer size byte FF69h IEPBBAX0 IN endpoint 0 - X buffer base address byte FF68h IEPCNF0 IN endpoint 0 - configuration byte 78 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 Table 6-1. USB Endpoint Configuration Blocks Address Map (continued) ADDRESS MNEMONIC NAME FF67h IEPDCNTY1 IN endpoint 1 - Y buffer data count byte FF66h Reserved Reserved for future use FF65h IEPBBAY1 IN endpoint 1 - Y buffer base address byte FF64h Reserved Reserved for future use FF63h IEPDCNTX1 IN endpoint 1 - X buffer data count byte FF62h IEPBSIZ1 IN endpoint 1 - X and Y buffer size byte FF61h IEPBBAX1 IN endpoint 1 - X buffer base address byte FF60h IEPCNF1 IN endpoint 1 - configuration byte FF5Fh IEPDCNTY2 IN endpoint 2 - Y buffer data count byte FF5Eh Reserved Reserved for future use FF5Dh IEPBBAY2 IN endpoint 2 - Y buffer base address byte FF5Ch Reserved Reserved for future use FF5Bh IEPDCNTX2 IN endpoint 2 - X buffer data count byte FF5Ah IEPBSIZ2 IN endpoint 2 - X and Y buffer size byte FF59h IEPBBAX2 IN endpoint 2 - X buffer base address byte FF58h IEPCNF2 IN endpoint 2 - configuration byte FF57h IEPDCNTY3 IN endpoint 3 - Y buffer data count byte FF56h Reserved Reserved for future use FF55h IEPBBAY3 IN endpoint 3 - Y buffer base address byte FF54h Reserved Reserved for future use FF53h IEPDCNTX3 IN endpoint 3 - X buffer data count byte FF52h IEPBSIZ3 IN endpoint 3 - X and Y buffer size byte FF51h IEPBBAX3 IN endpoint 3 - X buffer base address byte FF50h IEPCNF3 IN endpoint 3 - configuration byte FF4Fh IEPDCNTY4 IN endpoint 4 - Y buffer data count byte FF4Eh Reserved Reserved for future use FF4Dh IEPBBAY4 IN endpoint 4 - Y buffer base address byte FF4Ch Reserved Reserved for future use FF4Bh IEPDCNTX4 IN endpoint 4 - X buffer data count byte FF4Ah IEPBSIZ4 IN endpoint 4 - X and Y buffer size byte FF49h IEPBBAX4 IN endpoint 4 - X buffer base address byte FF48h IEPCNF4 IN endpoint 4 - configuration byte FF47h IEPDCNTY5 IN endpoint 5 - Y buffer data count byte FF46h Reserved Reserved for future use FF45h IEPBBAY5 IN endpoint 5 - Y buffer base address byte FF44h Reserved Reserved for future use FF43h IEPDCNTX5 IN endpoint 5 - X buffer data count byte FF42h IEPBSIZ5 IN endpoint 5 - X and Y buffer size byte FF41h IEPBBAX5 IN endpoint 5 - X buffer base address byte FF40h IEPCNF5 IN endpoint 5 - configuration byte FF3Fh IEPDCNTY6 IN endpoint 6 - Y buffer data count byte FF3Eh Reserved Reserved for future use FF3Dh IEPBBAY6 IN endpoint 6 - Y buffer base address byte FF3Ch Reserved Reserved for future use FF3Bh IEPDCNTX6 IN endpoint 6 - X buffer data count byte FF3Ah IEPBSIZ6 IN endpoint 6 - X and Y buffer size byte FF39h IEPBBAX6 IN endpoint 6 - X buffer base address byte Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 79 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Table 6-1. USB Endpoint Configuration Blocks Address Map (continued) ADDRESS MNEMONIC NAME FF38h IEPCNF6 IN endpoint 6 - configuration byte FF37h IEPDCNTY7 IN endpoint 7 - Y buffer data count byte FF36h Reserved Reserved for future use FF35h IEPBBAY7 IN endpoint 7 - Y buffer base address byte FF34h Reserved Reserved for future use FF33h IEPDCNTX7 IN endpoint 7 - X buffer data count byte FF32h IEPBSIZ7 IN endpoint 7 - X and Y buffer size byte FF31h IEPBBAX7 IN endpoint 7 - X buffer base address byte FF30h IEPCNF7 IN endpoint 7 - configuration byte 6.4.3 USB OUT Endpoint Configuration Bytes This section describes the individual bytes in the USB endpoint configuration blocks for the OUT endpoints. A set of 8 bytes is used for the control and operation of each USB OUT endpoint. In addition to the USB control endpoint, the TAS1020B supports up to a total of seven OUT endpoints. 6.4.3.1 USB OUT Endpoint - Y Buffer Data Count Byte (OEPDCNTYx) The USB OUT endpoint Y buffer data count byte contains the 7-bit value used to specify the amount of data received in a data packet from the host PC. The no acknowledge status bit is also contained in this byte. Bit 7 6 5 4 3 2 1 0 Mnemonic NACK DCNTY6 DCNTY5 DCNTY4 DCNTY3 DCNTY2 DCNTY1 DCNTY0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The no acknowledge status bit is set to a 1 by the UBM at the end of a successful USB OUT transaction to this endpoint to indicate that the USB endpoint Y buffer contains a valid data packet and that the Y buffer data count value is valid. For control, interrupt, or bulk endpoints, when this bit is set to a 1, all subsequent transactions to the endpoint result in a NACK handshake response to the host PC. 7 NACK No acknowledge Also for control, interrupt, and bulk endpoints to enable this endpoint to receive another data packet from the host PC, this bit must be cleared to a 0 by the MCU. For isochronous endpoints, a NACK handshake response to the host PC is not allowed. Therefore, the UBM ignores this bit in reference to receiving the next data packet. However, the MCU or DMA must clear this bit before reading the data packet from the buffer. The Y buffer data count value is set by the UBM when a new data packet is written to the Y buffer for the OUT endpoint. The 7-bit value is set to the number of bytes in the data packet for control, interrupt or bulk endpoint transfers and is set to the number of 6:0 DCNTY(6:0) Y Buffer data count samples in the data packet for isochronous endpoint transfers. To determine the number of samples in the data packet for isochronous transfers, the bytes per sample value in the configuration byte is used. The data count value is read by the MCU or DMA to obtain the data packet size. 6.4.3.2 USB OUT Endpoint - Y Buffer Base Address Byte (OEPBBAYx) The USB OUT endpoint Y buffer base address byte contains the 8-bit value used to specify the base memory location for the Y data buffer for a particular USB OUT endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BBAY10 BBAY9 BBAY8 BBAY7 BBAY6 BBAY5 BBAY4 BBAY3 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The Y buffer base address value is set by the MCU to program the base address 7:0 BBAY(10:3) Y Buffer base address location in memory to be used for the Y data buffer. A total of 11 bits is used to specify the base address location. This byte specifies the most significant 8 bits of the address. All 0s are used by the hardware for the three least significant bits. 80 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.4.3.3 USB OUT Endpoint - X Buffer Data Count Byte (OEPDCNTXx) The USB OUT endpoint X buffer data count byte contains the 7-bit value used to specify the amount of data received in a data packet from the host PC. The no acknowledge status bit is also contained in this byte. Bit 7 6 5 4 3 2 1 0 Mnemonic NACK DCNTX6 DCNTX5 DCNTX4 DCNTX3 DCNTX2 DCNTX1 DCNTX0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The no acknowledge status bit is set to a 1 by the UBM at the end of a successful USB OUT transaction to this endpoint to indicate that the USB endpoint X buffer contains a valid data packet and that the X buffer data count value is valid. For control, interrupt, or bulk endpoints, when this bit is set to a 1, all subsequent transactions to the endpoint result in a NACK handshake response to the host PC. 7 NACK No acknowledge Also for control, interrupt, and bulk endpoints to enable this endpoint to receive another data packet from the host PC, this bit must be cleared to a 0 by the MCU. For isochronous endpoints, a NACK handshake response to the host PC is not allowed. Therefore, the UBM ignores this bit in reference to receiving the next data packet. However, the MCU or DMA must clear this bit before reading the data packet from the buffer. The X buffer data count value is set by the UBM when a new data packet is written to the X buffer for the OUT endpoint. The 7-bit value is set to the number of bytes in the data packet for control, interrupt, or bulk endpoint transfers and is set to the number of 6:0 DCNTX(6:0) X Buffer data count samples in the data packet for isochronous endpoint transfers. To determine the number of samples in the data packet for isochronous transfers, the bytes per sample value in the configuration byte is used. The data count value is read by the MCU or DMA to obtain the data packet size. 6.4.3.4 USB OUT Endpoint - X and Y Buffer Size Byte (OEPBSIZx) The USB OUT endpoint X and Y buffer size byte contains the 8-bit value used to specify the size of the two data buffers to be used for this endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BSIZ7 BSIZ6 BSIZ5 BSIZ4 BSIZ3 BSIZ2 BSIZ1 BSIZ0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION For control, interrupt, and bulk transactions, the X and Y buffer size value is set by the MCU to program the size of the X and Y data packet buffers. Both buffers are 7:0 BSIZ(7:0) Buffer size programmed to the same size based on this value. This value is in 8-byte units. For example, a value of 18h results in the size of the X and Y buffers each being set to 192 bytes. For isochronous transactions, the buffer size sets the size of the single circular buffer. 6.4.3.5 USB OUT Endpoint - X Buffer Base Address Byte (OEPBBAXx) The USB OUT endpoint X buffer base address byte contains the 8-bit value used to specify the base memory location for the X data buffer for a particular USB OUT endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BBAX10 BBAX9 BBAX8 BBAX7 BBAX6 BBAX5 BBAX4 BBAX3 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The X buffer base address value is set by the MCU to program the base address 7:0 BBAX(10:3) X Buffer base address location in memory to be used for the X data buffer. A total of 11 bits is used to specify the base address location. This byte specifies the most significant 8 bits of the address. All 0s are used by the hardware for the three least significant bits. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 81 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.4.3.6 USB OUT Endpoint - Configuration Byte (OEPCNFx) The USB OUT endpoint configuration byte contains the various bits used to configure and control the endpoint. Note that the bits in this byte take on different functionality based on the type of endpoint defined. The control, interrupt, and bulk endpoints function differently than the isochronous endpoints. 6.4.3.6.1 USB OUT Endpoint Configuration Byte Settings—Control, interrupt, or Bulk Transactions This section defines the functionality of the bits in the USB OUT endpoint configuration byte for control, interrupt, and bulk endpoints. Bit 7 6 5 4 3 2 1 0 Mnemonic OEPEN ISO TOGGLE DBUF STALL OEPIE — — Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION 7 OEPEN Endpoint enable The endpoint enable bit is set to 1 by the MCU to enable the OUT endpoint. The isochronous endpoint bit is set to a 1 by the MCU to specify the use of a 6 ISO Isochronous endpoint particular OUT endpoint for isochronous transactions. This bit must be cleared to a 0 by the MCU to use a particular OUT endpoint for control, interrupt, or bulk transactions. The toggle bit is controlled by the UBM and is toggled at the end of a successful out 5 TOGGLE Toggle data stage transaction if a valid data packet is received and the data packet PID matches the expected PID. The double buffer mode bit is set to 1 by the MCU to enable the use of both the X and 4 DBUF Double buffer mode Y data packet buffers for USB transactions to a particular OUT endpoint. This bit must be cleared to a 0 by the MCU to use the single buffer mode. In the single buffer mode, only the X buffer is used. The stall bit is set to 1 by the MCU to stall endpoint transactions. When this bit is set, the hardware automatically returns a stall handshake to the host PC for any transaction received for the endpoint. An exception is the control endpoint setup stage transaction, which must always received. This requirement allows a 3 STALL Stall Clear_Feature_Stall request to be received from the host PC. Control endpoint data and status stage transactions however can be stalled. The stall bit is cleared to a 0 by the MCU if a Clear_Feature_Stall request or a USB reset is received from the host PC. For a control write transaction, if the amount of data received is greater than expected, the UBM sets the stall bit to a 1 to stall the endpoint. When the stall bit is set to a 1 by the UBM, the USB OUT endpoint 0 interrupt is generated. 2 OEPIE Interrupt enable The interrupt enable bit is set to a 1 by the MCU to enable the OUT endpoint interrupt. See Section 6.5.7.1 for details on the OUT endpoint interrupts. 1:0 — Reserved Reserved for future use 82 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.4.3.6.2 USB OUT Endpoint Configuration Byte Settings—Isochronous Transactions This section defines the functionality of the bits in the USB OUT endpoint configuration byte for isochronous endpoints. Bit 7 6 5 4 3 2 1 0 Mnemonic OEPEN ISO OVF BPS4 BPS3 BPS2 BPS1 BPS0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION 7 OEPEN Endpoint enable The endpoint enable bit is set to a 1 by the MCU to enable the OUT endpoint. The isochronous endpoint bit is set to a 1 by the MCU to specify the use of a 6 ISO Isochronous endpoint particular OUT endpoint for isochronous transactions. This bit must be cleared to a 0 by the MCU for a particular OUT endpoint to be used for control, interrupt, or bulk transactions. The overflow bit is set to a 1 by the UBM to indicate a buffer overflow condition has 5 OVF Overflow occurred. This bit is used for diagnostic purposes only and is not used for normal operation. This bit can only be cleared to a 0 by the MCU. The bytes per sample bits are used to define the number of bytes per isochronous data sample. In other words, the total number of bytes in an entire audio codec frame. 4:0 BPS(4:0) Bytes per sample For example, a PCM 16-bit stereo audio data sample consists of 4 bytes. There are two bytes of left channel data and two bytes of right channel data. For a four channel system using 16-bit data, the total number of bytes is 8, which is the isochronous data sample size.00h = 1 byte, 01h = 2 bytes, …, 1Fh = 32 bytes 6.4.4 USB IN Endpoint Configuration Bytes This section describes the individual bytes in the USB endpoint configuration blocks for the IN endpoints. A set of 8 bytes is used for the control and operation of each USB IN endpoint. In addition to the USB control endpoint, the TAS1020B supports up to a total of seven IN endpoints. 6.4.4.1 USB IN Endpoint - Y Buffer Data Count Byte (IEPDCNTYx) The USB IN endpoint Y buffer data count byte contains the 7-bit value used to specify the amount of data to be transmitted in a data packet to the host PC. The no acknowledge status bit is also contained in this byte. Bit 7 6 5 4 3 2 1 0 Mnemonic NACK DCNTY6 DCNTY5 DCNTY4 DCNTY3 DCNTY2 DCNTY1 DCNTY0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The no acknowledge status bit is set to a 1 by the UBM at the end of a successful USB IN transaction to this endpoint to indicate that the USB endpoint Y buffer is empty. For control, interrupt, or bulk endpoints, when this bit is set to a 1, all subsequent transactions to the endpoint result in a NACK handshake response to the 7 NACK No acknowledge host PC. Also for control, interrupt, and bulk endpoints to enable this endpoint to transmit another data packet to the Host PC, this bit must be cleared to a 0 by the MCU. For isochronous endpoints, a NACK handshake response to the host PC is not allowed. Therefore, the UBM ignores this bit in reference to sending the next data packet. However, the MCU or DMA must clear this bit after writing a data packet to the buffer. The Y buffer data count value is set by the MCU or DMA when a new data packet is written to the Y buffer for the IN endpoint. The 7-bit value is set to the number of bytes 6:0 DCNTY(6:0) Y Buffer data count in the data packet for control, interrupt, or bulk endpoint transfers and is set to the number of samples in the data packet for isochronous endpoint transfers. To determine the number of samples in the data packet for isochronous transfers, the bytes per sample value in the configuration byte is used. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 83 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.4.4.2 USB IN Endpoint - Y Buffer Base Address Byte (IEPBBAYx) The USB IN endpoint Y buffer base address byte contains the 8-bit value used to specify the base memory location for the Y data buffer for a particular USB IN endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BBAY10 BBAY9 BBAY8 BBAY7 BBAY6 BBAY5 BBAY4 BBAY3 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The Y buffer base address value is set by the MCU to program the base address 7:0 BBAY(10:3) Y Buffer base address location in memory to be used for the Y data buffer. A total of 11 bits is used to specify the base address location. This byte specifies the most significant 8 bits of the address. All 0s are used by the hardware for the three least significant bits. 6.4.4.3 USB IN Endpoint - X Buffer Data Count Byte (IEPDCNTXx) The USB IN endpoint X buffer data count byte contains the 7-bit value used to specify the amount of data received in a data packet from the host PC. The no acknowledge status bit is also contained in this byte. Bit 7 6 5 4 3 2 1 0 Mnemonic NACK DCNTX6 DCNTX5 DCNTX4 DCNTX3 DCNTX2 DCNTX1 DCNTX0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The no acknowledge status bit is set to a 1 by the UBM at the end of a successful USB IN transaction to this endpoint to indicate that the USB endpoint X buffer is empty. For control, interrupt, or bulk endpoints, when this bit is set to a 1, all subsequent transactions to the endpoint result in a NACK handshake response to the 7 NACK No acknowledge host PC. Also for control, interrupt, and bulk endpoints to enable this endpoint to transmit another data packet to the host PC, this bit must be cleared to a 0 by the MCU. For isochronous endpoints, a NACK handshake response to the host PC is not allowed. Therefore, the UBM ignores this bit in reference to sending the next data packet. However, the MCU or DMA must clear this bit after writing a data packet to the buffer. The X buffer data count value is set by the MCU or DMA when a new data packet is written to the X buffer for the IN endpoint. The 7-bit value is set to the number of bytes 6:0 DCNTX(6:0) X Buffer data count in the data packet for control, interrupt, or bulk endpoint transfers and is set to the number of samples in the data packet for isochronous endpoint transfers. To determine the number of samples in the data packet for isochronous transfers, the bytes per sample value in the configuration byte is used. 6.4.4.4 USB IN Endpoint - X and Y Buffer Size Byte (IEPBSIZx) The USB IN endpoint X and Y buffer size byte contains the 8-bit value used to specify the size of the two data buffers to be used for this endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BSIZ7 BSIZ6 BSIZ5 BSIZ4 BSIZ3 BSIZ2 BSIZ1 BSIZ0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION For control, interrupt, and bulk transactions, the X and Y buffer size value is set by the MCU to program the size of the X and Y data packet buffers. Both buffers are 7 BSIZ(7:0) Buffer size programmed to the same size based on this value. This value should be in 8 byte units. For example, a value of 18h results in the size of the X and Y buffers each being set to 192 bytes. For isochronous transactions, the buffer size sets the size of the single circular buffer. 84 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.4.4.5 USB IN Endpoint - X Buffer Base Address Byte (IEPBBAXx) The USB IN endpoint X buffer base address byte contains the 8-bit value used to specify the base memory location for the X data buffer for a particular USB IN endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic BBAX10 BBAX9 BBAX8 BBAX7 BBAX6 BBAX5 BBAX4 BBAX3 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION The X buffer base address value is set by the MCU to program the base address 7:0 BBAX(10:3) X Buffer base address location in memory to be used for the X data buffer. A total of 11 bits is used to specify the base address location. This byte specifies the most significant 8 bits of the address. All 0s are used by the hardware for the three least significant bits. 6.4.4.6 USB IN Endpoint - Configuration Byte (IEPCNFx) The USB IN endpoint configuration byte contains the various bits used to configure and control the endpoint. Note that the bits in this byte take on different functionality based on the type of endpoint defined. Basically, the control, interrupt and bulk endpoints function differently than the isochronous endpoints. 6.4.4.6.1 USB IN Endpoint Configuration Byte Settings - Control, Interrupt or Bulk Transactions This section defines the functionality of the bits in the USB IN endpoint configuration byte for control, interrupt, and bulk endpoints. Bit 7 6 5 4 3 2 1 0 Mnemonic IEPEN ISO TOGGLE DBUF STALL IEPIE — — Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION 7 IEPEN Endpoint enable The endpoint enable bit is set to a 1 by the MCU to enable the IN endpoint. This bit does not affect the reception of the control endpoint setup stage transaction. The isochronous endpoint bit is set to a 1 by the MCU to specify the use of a 6 ISO Isochronous endpoint particular IN endpoint for isochronous transactions. This bit must be cleared to a 0 by the MCU to use a particular IN endpoint for control, interrupt, or bulk transactions. The toggle bit is controlled by the UBM and is toggled at the end of a successful in 5 TOGGLE Toggle data stage transaction if a valid data packet is transmitted. If this bit is a 0, a DATA0 PID is transmitted in the data packet to the host PC. If this bit is a 1, a DATA1 PID is transmitted in the data packet. The double buffer mode bit is set to a 1 by the MCU to enable the use of both the X 4 DBUF Double buffer mode and Y data packet buffers for USB transactions to a particular IN endpoint. This bit must be cleared to a 0 by the MCU to use the single buffer mode. In the single buffer mode, only the X buffer is used. The stall bit is set to a 1 by the MCU to stall endpoint transactions. When this bit is 3 STALL Stall set, the hardware automatically returns a stall handshake to the host PC for any transaction received for the endpoint. 2 IEPIE Interrupt enable The interrupt enable bit is set to a 1 by the MCU to enable the IN endpoint interrupt. See Section 6.5.7.2 for details on the IN endpoint interrupts. 1:0 — Reserved Reserved for future use. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 85 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.4.4.6.2 USB IN Endpoint Configuration Byte Settings - Isochronous Transactions This section defines the functionality of the bits in the USB IN endpoint configuration byte for isochronous endpoints. Bit 7 6 5 4 3 2 1 0 Mnemonic IEPEN ISO OVF BPS4 BPS3 BPS2 BPS1 BPS0 Type R/W R/W R/W R/W R/W R/W R/W R/W BIT MNEMONIC NAME DESCRIPTION 7 IEPEN Endpoint enable The endpoint enable bit is set to a 1 by the MCU to enable the IN endpoint. The isochronous endpoint bit is set to a 1 by the MCU to specify the use of a 6 ISO Isochronous endpoint particular IN endpoint for isochronous transactions. This bit must be cleared to a 0 by the MCU for a particular IN endpoint to be used for control, interrupt, or bulk transactions. The overflow bit is set to a 1 by the UBM to indicate a buffer overflow condition has 5 OVF Overflow occurred. This bit is used for diagnostic purposes only and is not used for normal operation. This bit can only be cleared to a 0 by the MCU. The bytes per sample bits are used to define the number of bytes per isochronous data sample. In other words, the total number of bytes in an entire audio codec frame. 4:0 BPS(4:0) Bytes per sample For example, a PCM 16-bit stereo audio data sample consists of 4 bytes. There are two bytes of left channel data and two bytes of right channel data. For a four channel system using 16-bit data, the total number of bytes is 8, which is the isochronous data sample size. 00h = 1 byte, 01h = 2 bytes, …, 1Fh = 32 bytes 6.4.5 USB Control Endpoint Setup Stage Data Packet Buffer The USB control endpoint setup stage data packet buffer is the buffer space used to store the 8-byte data packet received from the host PC during a control endpoint transfer setup stage transaction. Refer to Chapter 9 of the USB Specification for details on the data packet. Table 6-2. USB Control Endpoint Setup Data Packet Buffer Address Map ADDRESS NAME FF2Fh wLength - Number of bytes to transfer in the data stage FF2Eh wLength - Number of bytes to transfer in the data stage FF2Dh wIndex - Index or offset value FF2Ch wIndex - Index or offset value FF2Bh wValue - Value of a parameter specific to the request FF2Ah wValue - Value of a parameter specific to the request FF29h bRequest - Specifies the particular request FF28h bmRequestType - Identifies the characteristics of the request 86 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5 Memory-Mapped Registers The TAS1020B device provides a set of control and status registers to be used by the MCU to control the overall operation of the device. This section describes the memory-mapped registers. Table 6-3. Memory-Mapped Registers Address Map ADDRESS MNEMONIC NAME SECTION FFFFh USBFADR USB function address register Section 6.5.1.1 FFFEh USBSTA USB status register Section 6.5.1.2 FFFDh USBIMSK USB interrupt mask register Section 6.5.1.3 FFFCh USBCTL USB control register Section 6.5.1.4 FFFBh USBFNL USB frame number register (low-byte) Section 6.5.1.5 FFFAh USBFNH USB frame number register (high-byte) Section 6.5.1.6 FFF9h ACG2FRQ0 Adaptive clock generator2 frequency register (Byte 0) Section 6.5.3.6 FFF8h ACG2FRQ1 Adaptive clock generator2 frequency register (Byte 1) Section 6.5.3.7 FFF7h ACG2FRQ2 Adaptive clock generator2 frequency register (Byte 2) Section 6.5.3.8 FFF6h ACG2DCTL Adaptive clock generator2 divider control register Section 6.5.3.9 FFF5h Reserved Reserved for future use FFF4h DMABCNT1H DMA buffer content register (high-byte) (channel 1) Section 6.5.2.5 FFF3h DMABCNT1L DMA buffer content register (low-byte) (channel 1) Section 6.5.2.4 FFF2h DMABPCT0 DMA bulk packet count register (low-byte) Section 6.5.2.6 FFF1h DMABPCT1 DMA bulk packet count register (high-byte) Section 6.5.2.7 FFF0h DMATSL1 DMA time slot assignment register (low-byte) (channel 1) Section 6.5.2.1 FFEFh DMATSH1 DMA time slot assignment register (high-byte) (channel 1) Section 6.5.2.1 FFEEh DMACTL1 DMA control register (channel 1) Section 6.5.2.3 FFEDh Reserved Reserved for future use FFECh DMABCNT0H DMA current buffer content register (high-byte) (channel 0) Section 6.5.2.5 FFEBh DMABCNT0L DMA current buffer content register (low-byte) (channel 0) Section 6.5.2.4 FFEAh DMATSL0 DMA time slot assignment register (low-byte) (channel 0) Section 6.5.2.1 FFE9h DMATSH0 DMA time slot assignment register (high-byte) (channel 0) Section 6.5.2.2 FFE8h DMACTL0 DMA control register (channel 0) Section 6.5.2.3 FFE7h ACG1FRQ0 Adaptive clock generator1 frequency register (byte 0) Section 6.5.3.1 FFE6h ACG1FRQ1 Adaptive clock generator1 frequency register (byte 1) Section 6.5.3.2 FFE5h ACG1FRQ2 Adaptive clock generator1 frequency register (byte 2) Section 6.5.3.3 FFE4h ACGCAPL Adaptive clock generator1 MCLK capture register (low byte) Section 6.5.3.4 FFE3h ACGCAPH Adaptive clock generator1 MCLK capture register (high byte) Section 6.5.3.5 FFE2h ACG1DCTL Adaptive clock generator1 divider control register Section 6.5.3.10 FFE1h ACGCTL Adaptive clock generator control register Section 6.5.3.11 FFE0h CPTCNF1 Codec port interface configuration register 1 Section 6.5.4.1 FFDFh CPTCNF2 Codec port interface configuration register 2 Section 6.5.4.2 FFDEh CPTCNF3 Codec port interface configuration register 3 Section 6.5.4.3 FFDDh CPTCNF4 Codec port interface configuration register 4 Section 6.5.4.4 FFDCh CPTCTL Codec port interface control and status register Section 6.5.4.5 FFDBh CPTADR Codec port interface address register Section 6.5.4.6 FFDAh CPTDATL Codec port interface data register (low-byte) Section 6.5.4.7 FFD9h CPTDATH Codec port interface data register (high-byte) Section 6.5.4.8 FFD8h CPTVSLL Codec port interface valid slots register (low-byte) Section 6.5.4.9 FFD7h CPTVSLH Codec port interface valid slots register (high-byte) Section 6.5.4.10 FFD6h CPTRXCNF2 Codec port receive interface configuration register 2 Section 6.5.4.11 FFD5h CPTRXCNF3 Codec port receive interface configuration register 3 Section 6.5.4.12 Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 87 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com Table 6-3. Memory-Mapped Registers Address Map (continued) ADDRESS MNEMONIC NAME SECTION FFD4h CPTRXCNF4 Codec port receive interface configuration register 4 Section 6.5.4.13 FFD3h Reserved Reserved for future use FFD2h Reserved Reserved for future use FFD1h Reserved Reserved for future use FFD0h Reserved Reserved for future use FFCFh Reserved Reserved for future use FFCEh Reserved Reserved for future use FFCDh Reserved Reserved for future use FFCCh Reserved Reserved for future use FFCBh Reserved Reserved for future use FFCAh P3MSK Mask register for P3 Section 6.5.5.1 FFC9h Reserved Reserved for future use FFC8h Reserved Reserved for future use FFC7h Reserved Reserved for future use FFC6h Reserved Reserved for future use FFC5h Reserved Reserved for future use FFC4h Reserved Reserved for future use FFC3h I2CADR I2C interface address register Section 6.5.6.1 FFC2h I2CDATI I2C interface receive data register Section 6.5.6.2 FFC1h I2CDATO I2C interface transmit data register Section 6.5.6.3 FFC0h I2CCTL I2C interface control and status register Section 6.5.6.4 FFBFh Reserved Reserved for future use FFBEh Reserved Reserved for future use FFBDh Reserved Reserved for future use FFBCh Ch0WrPtrL UBM write pointer (low-byte) (8 bits) Section 6.5.2.8 FFBBh Ch0WrPtrH UBM write pointer (high-byte) (3 bits) Section 6.5.2.9 FFBAh Ch0RdPtrL DMA read pointer (low-byte) (8 bits) Section 6.5.2.10 FFB9h Ch0RdPtrH DMA read pointer (high-byte) (3 bits) Section 6.5.2.11 FFB8h Ch1WrPtrL UBM write pointer (low-byte) (8 bits) Section 6.5.2.8 FFB7h Ch1WrPtrH UBM write pointer (high-byte) (3 bits) Section 6.5.2.9 FFB6h Ch1RdPtrL DMA read pointer (low-byte) (8 bits) Section 6.5.2.10 FFB5h Ch1RdPtrH DMA read pointer (high-byte) (3 bits) Section 6.5.2.11 FFB4h OEPINT USB OUT endpoint interrupt register Section 6.5.7.1 FFB3h IEPINT USB IN endpoint interrupt register Section 6.5.7.2 FFB2h VECINT Interrupt vector register Section 6.5.7.3 FFB1h GLOBCTL Global control register Section 6.5.7.4 FFB0h MEMCFG Memory configuration register Section 6.5.7.5 88 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.1 USB Registers This section describes the memory-mapped registers used for control and operation of the USB functions. This section consists of six registers used for USB functions. 6.5.1.1 USB Function Address Register (USBFADR - Address FFFFh) The USB function address register contains the current setting of the USB device address assigned to the function by the host. After power-on reset or USB reset, the default address is 00h. During enumeration of the function by the host, the MCU should load the assigned address to this register when a USB Set_Address request is received by the control endpoint. Bit 7 6 5 4 3 2 1 0 Mnemonic — FA6 FA5 FA4 FA3 FA2 FA1 FA0 Type R R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7 — Reserved Reserved for future use 6:0 FA(6:0) Function address The function address bit values are set by the MCU to program the USB device address assigned by the host PC. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 89 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.1.2 USB Status Register (USBSTA - Address FFFEh) The USB status register contains various status bits used for USB operations. Bit 7 6 5 4 3 2 1 0 Mnemonic RSTR SUSR RESR SOF PSOF SETUP — STPOW Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The function reset bit is set to a 1 by hardware in response to the host PC initiating a USB reset to the function. When a USB reset occurs, all of the USB logic blocks, including the SIE, UBM, frame timer, and suspend/resume are automatically reset. The function reset enable (FRSTE) control bit in the USB control register, when set, 7 RSTR Function reset enables the USB reset to reset all remaining TAS1020B logic, except the shadow the ROM (SDW) and the USB function connect (CONT) bits. Also, when the FRSTE control bit is set to a 1, the reset output (RSTO) signal from the TAS1020B device is also active when a USB reset occurs. This bit is read only and is cleared when the MCU writes to the interrupt vector register. The function suspend bit is set to a 1 by hardware when a USB suspend condition is 6 SUSR Function suspend detected by the suspend/resume logic. See Section 2.2.5 for details on the USB suspend and resume operation. This bit is read only and is cleared when the MCU writes to the interrupt vector register. The function resume bit is set to a 1 by hardware when a USB resume condition is 5 RESR Function resume detected by the suspend/resume logic. See Section 2.2.5 for details on the USB suspend and resume operation. This bit is read only and is cleared when the MCU writes to the interrupt vector register. The start-of-frame bit is set to a 1 by hardware when a new USB frame starts. This bit is set when the SOF packet from the host PC is detected, even if the TAS1020B 4 SOF Start-of-frame frame timer is not locked to the host PC frame timer. This bit is read only and is cleared when the MCU writes to the interrupt vector register. The nominal SOF rate is 1 ms. The pseudo start-of-frame bit is set to a 1 by hardware when a USB pseudo SOF occurs. The pseudo SOF is an artificial SOF signal that is generated when the 3 PSOF Pseudo start-of-frame TAS1020B frame timer is not locked to the host PC frame timer. This bit is read only and is cleared when the MCU writes to the interrupt vector register. The nominal pseudo SOF rate is 1 ms. The setup stage transaction bit is set to a 1 by hardware when a successful control endpoint setup stage transaction is completed. Upon completion of the setup stage 2 SETUP Setup stage transaction transaction, the USB control endpoint setup stage data packet buffer should contain a new setup stage data packet. This bit is read-only and is cleared when the MCU writes to the interrupt vector register. 1 — Reserved Reserved for future use The setup stage transaction over-write bit is set to a 1 by hardware when the data in Setup stage transaction the USB control endpoint setup data packet buffer is over-written. This scenario 0 STPOW over-write occurs when the host PC prematurely terminates a USB control transfer by simply starting a new control transfer with a new setup stage transaction. This bit is read-only and is cleared when the MCU writes to the interrupt vector register. 90 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.1.3 USB Interrupt Mask Register (USBIMSK - Address FFFDh) The USB interrupt mask register contains the interrupt mask bits used to enable or disable the generation of interrupts based on the corresponding status bits. Bit 7 6 5 4 3 2 1 0 Mnemonic RSTR SUSR RESR SOF PSOF SETUP — STPOW Type R/W R/W R/W R/W R/W R/W R R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7 RSTR Function reset The function reset interrupt mask bit is set to a 1 by the MCU to enable the USB function reset interrupt. 6 SUSR Function suspend The function suspend interrupt mask bit is set to a 1 by the MCU to enable the USB function suspend interrupt. 5 RESR Function resume The function resume interrupt mask bit is set to a 1 by the MCU to enable the USB function resume interrupt. 4 SOF Start-of-frame The start-of-frame interrupt mask bit is set to a 1 by the MCU to enable the USB start-of-frame interrupt. 3 PSOF Pseudo start-of-frame The pseudo start-of-frame interrupt mask bit is set to a 1 by the MCU to enable the USB pseudo start-of-frame interrupt. 2 SETUP Setup stage transaction The setup stage transaction interrupt mask bit is set to a 1 by the MCU to enable the USB setup stage transaction interrupt. 1 — Reserved Reserved for future use 0 STPOW Setup stage transaction The setup stage transaction over-write interrupt mask bit is set to a 1 by the MCU to over-write enable the USB setup stage transaction over-write interrupt. 6.5.1.4 USB Control Register (USBCTL - Address FFFCh) The USB control register contains various control bits used for USB operations. Bit 7 6 5 4 3 2 1 0 Mnemonic CONT FEN RWUP FRSTE — — — SDW_OK Type R/W R/W R/W R/W R R R R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The function connect bit is set to 1 by the MCU to connect the TAS1020B device to the USB. As a result of connecting to the USB, the host PC should enumerate the 7 CONT Function connect function. When this bit is set, the USB data plus pullup resistor (PUR) output signal is enabled, which connects the pullup on the PCB to the TAS1020B 3.3-V supply voltage. When this bit is cleared to 0, the PUR output is in the high-impedance state. This bit is not affected by a USB reset. The function enable bit is set to 1 by the MCU to enable the TAS1020B device to 6 FEN Function enable respond to USB transactions. If this bit is cleared to 0, the UBM ignores all USB transactions. This bit is cleared by a USB reset. The remote wake-up bit is set to 1 by the MCU to request the suspend/resume logic to 5 RWUP Remote wake-up generate resume signaling upstream on the USB. This bit is used to exit a USB low-power suspend state when a remote wake-up event occurs. After initiating the resume signaling by setting this bit, the MCU should clear this bit within 2.5 μs. The function reset enable bit is set to 1 by the MCU to enable the USB reset to reset all internal logic including the MCU. However, the shadow the ROM (SDW) and the 4 FRSTE Function reset enable USB function connect (CONT) bits will not be reset. When this bit is set, the reset output (RSTO) signal from the TAS1020B device is also active when a USB reset occurs. This bit is not affected by USB reset. 3 — Reserved Reserved for future use. 2 — Reserved Reserved for future use. 1 — Reserved Reserved for future use. This bit is used as a confirmation bit to prevent a user from spuriously clearing the 0 SDW_OK SDW bit confirm SDW bit in the MEMCFG register. This bit must be set to 1 before clearing the SDW bit to switch from normal mode to boot mode. This bit is not affected by USB reset. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 91 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.1.5 USB Frame Number Register (Low Byte) (USBFNL - Address FFFBh) The USB frame number register (low byte) contains the least significant byte of the 11-bit frame number value received from the host PC in the start-of-frame packet. Bit 7 6 5 4 3 2 1 0 Mnemonic FN7 FN6 FN5 FN4 FN3 FN2 FN1 FN0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The frame number bit values are updated by hardware each USB frame with the frame number field value received in the USB start-of-frame packet. The frame 7:0 FN(7:0) Frame number number can be used as a time stamp by the USB function. If the TAS1020B frame timer is not locked to the host PC frame timer, then the frame number is incremented from the previous value when a pseudo start-of-frame occurs. 6.5.1.6 USB Frame Number Register (High Byte) (USBFNH - Address FFFAh) The USB frame number register (high byte) contains the most significant 3 bits of the 11-bit frame number value received from the host PC in the start-of-frame packet. Bit 7 6 5 4 3 2 1 0 Mnemonic — — — — — FN10 FN9 FN8 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:3 — Reserved Reserved for future use. The frame number bit values are updated by hardware each USB frame with the frame number field value received in the USB start-of-frame packet. The frame 2:0 FN(10:8) Frame number number can be used as a time stamp by the USB function. If the TAS1020B frame timer is not locked to the host PC frame timer, then the frame number is incremented from the previous value when a pseudo start-of-frame occurs. 6.5.2 DMA Registers This section describes the memory-mapped registers used for the two DMA channels. Each DMA channel has a set of three registers. 6.5.2.1 DMA Time Slot Assignment Register (Low Byte) (DMATSL1 - Address FFF0h) (DMATSL0 - Address FFEAh) Bit 7 6 5 4 3 2 1 0 Mnemonic TSL7 TSL6 TSL5 TSL4 TSL3 TSL2 TSL1 TSL0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 TSL(7:0) Time slot assignment The DMA time slot assignment bits are set to 1 by the MCU to define the codec port interface time slots supported by this DMA channel. 92 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.2.2 DMA Time Slot Assignment Register (High Byte) (DMATSH1 - Address FFEFh) (DMATSH0 - Address FFE9h) Bit 7 6 5 4 3 2 1 0 Mnemonic BPTS1 BPTS0 TSL13 TSL12 TSL11 TSL10 TSL9 TSL8 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The bytes per time slot bits are used to define the number of bytes to be transferred for each time slot supported by this DMA channel. 7:6 BPTS(1:0) Bytes per time slot 00b = 1 byte 01b = 2 bytes 10b = 3 bytes 11b = 4 bytes 5:0 TSL(13:8) Time slot assignment The DMA time slot assignment bits are set to 1 by the MCU to define the codec port interface time slots supported by this DMA channel. 6.5.2.3 DMA Control Register (DMACTL1 - Address FFEEh) (DMACTL0 - Address FFE8h) Bit 7 6 5 4 3 2 1 0 Mnemonic DMAEN HSKEN — — EPDIR EPNUM2 EPNUM1 EPNUM0 Type R/W R/W R R R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The DMA enable bit is set to a 1 by the MCU to enable this DMA channel. Before 7 DMAEN DMA enable enabling the DMA channel, all other DMA channel configuration bits must be set to the desired value. This bit is relevant for BULK data transfer in the OUT direction through DMA. MCU must set this bit to a 1 to enable the handshake mode for the data transfer. If MCU sets this bit, MCU has to enable DMA for each received BULK OUT packet. DMA, 6 HSKEN Handshake enable once enabled, transfers the BULK OUT packet to the C-port, disables itself and generates an interrupt to the MCU. If MCU clears this bit, DMA handles the BULK OUT data transfer to the C-port without MCU intervention. For more details, see Section 2.2.7.3.3. 5 — Reserved Reserved for future use 4 — Reserved Reserved for future use The USB endpoint direction bit controls the direction of data transfer by this DMA 3 EPDIR USB endpoint direction channel. The MCU should set this bit to a 1 to configure this DMA channel to be used for a USB IN endpoint. The MCU must clear this bit to a 0 to configure this DMA channel to be used for a USB OUT endpoint. The USB endpoint number bits are set by the MCU to define the USB endpoint number supported by this DMA channel. Keep in mind that endpoint 0 is always used for the control endpoint, which is serviced by the MCU and not a DMA channel. 2:0 EPNUM(2:0) USB endpoint number 001b = Endpoint 1 010b = Endpoint 2 ⋮ 111b = Endpoint 7 000b = Illegal 6.5.2.4 DMA Current Buffer Content Register (Low-Byte) (DMABCNT1L - Address FFF3h) (DMABCNT0LAddress FFEBh) Bit 7 6 5 4 3 2 1 0 Mnemonic Size 7 Size 6 Size 5 Size 4 Size 3 Size 2 Size 1 Size 0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register shows the buffer content (bytes) for an ISO OUT endpoint. This register 7:0 Size(7:0) Buffer content is updated every SOF and is stable for the following USB frame, during which the MCU can read it to implement USB audio synchronization. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 93 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.2.5 DMA Current Buffer Content Register (High Byte) (DMABCNT1H - Address FFF4h) (DMABCNT0H - Address FFECh) Bit 7 6 5 4 3 2 1 0 Mnemonic Size 15 Size 14 Size 13 Size 12 Size 11 Size 10 Size 9 Size 8 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register shows the buffer content (bytes) for an ISO OUT endpoint. This register 7:0 Size(15:8) Buffer content is updated every SOF and is stable for the following USB frame, during which the MCU can read it to implement USB audio synchronization. 6.5.2.6 DMA Bulk Packet Count Register (Low Byte) (DMABPCT0 - Address FFF2h) Bit 7 6 5 4 3 2 1 0 Mnemonic PCNT7 PCNT6 PCNT5 PCNT4 PCNT3 PCNT2 PCNT1 PCNT0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register shows the number of BULK OUT packets DMA has to handle in 7:0 PCNT (7:0) Bulk packet count handshake mode. MCU writes to this register before enabling the DMA to program the DMA to handle up to 64K BULK packets without MCU intervention. MCU can read this register anytime. 6.5.2.7 DMA Bulk Packet Count Register (High-byte) (DMABPCT1 - Address FFF1h) Bit 7 6 5 4 3 2 1 0 Mnemonic PCNT15 PCNT14 PCNT13 PCNT12 PCNT11 PCNT10 PCNT9 PCNT8 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register shows the number of BULK OUT packets DMA has to handle in 7:0 PCNT (15:8) Bulk packet count handshake mode. MCU writes to this register before enabling the DMA to program the DMA to handle up to 64K BULK packets without MCU intervention. MCU can read this register anytime. 6.5.2.8 UBM Write Pointer (Low Byte) (Ch0WrPtrL - Address FFBCh) (Ch1WrPtrL - Address FFB8h) Bit 7 6 5 4 3 2 1 0 Mnemonic WRPTR7 WRPTR6 WRPTR5 WRPTR4 WRPTR3 WRPTR2 WRPTR1 WRPTR0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register contains 8 LSB bits of 11-bit UBM write pointer of the isochronous OUT 7:0 WRPTR(7:0) UBM write pointer endpoint buffer. MCU can read this register anytime. This 11-bit UBM write pointer WRPTR can be used in conjunction with the corresponding 11-bit CHn DMA RDPTR to estimate the amount of data in the isochronous OUT endpoint buffer. 94 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.2.9 UBM Write Pointer (High Byte) (Ch0WrPtrH - Address FFBBh) (Ch1WrPtrH - Address FFB7h) Bit 7 6 5 4 3 2 1 0 Mnemonic — — — — — WRPTR10 WRPTR9 WRPTR8 Type — — — — — R R R Default — — — — — 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register contains 3 MSB bits of 11-bit UBM write pointer of the isochronous OUT 2:0 WRPTR(10:8) UBM write pointer endpoint buffer. MCU can read this register anytime. This 11-bit UBM write pointer WRPTR can be used in conjunction with the corresponding 11-bit CHn DMA RDPTR to estimate the amount of data in the isochronous OUT endpoint buffer. 7:3 — Reserved Reserved for future use 6.5.2.10 DMA Read Pointer (Low Byte) (Ch0RdPtrL - Address FFBAh) (Ch1RdPtrL - Address FFB6h) Bit 7 6 5 4 3 2 1 0 Mnemonic RDPTR7 RDPTR6 RDPTR5 RDPTR4 RDPTR3 RDPTR2 RDPTR1 RDPTR0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register contains 8 LSB bits of 11-bit DMA channel n (n can be 0 or 1) read pointer of the Isochronous OUT endpoint buffer. MCU can read this register anytime. 7:0 RDPTR(7:0) DMA read pointer This 11-bit CHn DMA read pointer RDPTR can be used in conjunction with the corresponding 11-bit UBM write pointer WRPTR to estimate the amount of data in the isochronous OUT endpoint buffer. 6.5.2.11 DMA Read Pointer (High Byte) (Ch0RdPtrH - Address FFB9h) (Ch1RdPtrH - Address FFB5h) Bit 7 6 5 4 3 2 1 0 Mnemonic — — — — — WRPTR10 WRPTR9 WRPTR8 Type — — — — — R R R Default — — — — — 0 0 0 BIT MNEMONIC NAME DESCRIPTION This register contains 3 MSB bits of 11-bit channel n (n can be 0 or 1) read pointer of the Isochronous OUT endpoint buffer. MCU can read this register anytime. This 11-bit 2:0 RDPTR(10:8) DMA read pointer CHn DMA RDPTR can be used in conjunction with the corresponding 11-bit UBM write pointer WRPTR to estimate the amount of data in the isochronous OUT endpoint buffer. 7:3 — Reserved Reserved for future use Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 95 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.3 Adaptive Clock Generator Registers This section describes the memory-mapped registers used for two adaptive clock generators for their controls and operations. 6.5.3.1 Adaptive Clock Generator1 Frequency Register (Byte 0) (ACG1FRQ0 - Address FFE7h) The adaptive clock generator frequency register (byte 0) contains the least significant byte of the 24-bit ACG frequency value. The adaptive clock generator frequency registers, ACG1FRQ0, ACG1FRQ1, and ACG1FRQ2, contain the 24-bit value used to program the ACG1 frequency synthesizer. The 24-bit value of these three registers can be used to determine the codec master clock output (MCLKO) signal frequency. The output of the ACG2 frequency synthesizer can also be used to source MCLK0. See Section 2.2.6 for the operation details of the adaptive clock generator including instructions for programming the 24-bit ACG frequency value. Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ7 FRQ6 FRQ5 FRQ4 FRQ3 FRQ2 FRQ1 FRQ0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(7:0) ACG frequency The ACG frequency bit values are set by the MCU to program the ACG1 frequency synthesizer. 6.5.3.2 Adaptive Clock Generator1 Frequency Register (Byte 1) (ACG1FRQ1 - Address FFE6h) The adaptive clock generator frequency register (byte 1) contains the middle byte of the 24-bit ACG 1 frequency value. Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ15 FRQ14 FRQ13 FRQ12 FRQ11 FRQ10 FRQ9 FRQ8 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(15:8) ACG frequency The ACG frequency bit values are set by the MCU to program the ACG1 frequency synthesizer. 6.5.3.3 Adaptive Clock Generator1 Frequency Register (Byte 2) (ACG1FRQ2 - Address FFE5h) The adaptive clock generator frequency register (byte 2) contains the most significant byte of the 24-bit ACG frequency value. Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ23 FRQ22 FRQ21 FRQ20 FRQ19 FRQ18 FRQ17 FRQ16 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(23:16) ACG frequency The ACG frequency bit values are set by the MCU to program the ACG1 frequency synthesizer. 96 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.3.4 Adaptive Clock Generator MCLK Capture Register (Low Byte) (ACGCAPL - Address FFE4h) The adaptive clock generator MCLK capture register (low byte) contains the least significant byte of the 16-bit codec master clock (MCLK) signal cycle count that is captured each time a USB start of frame (SOF) occurs. The value of a16-bit free running counter, which is clocked with the MCLK signal, is captured at the beginning of each USB frame. The source of the MCLK signal used to clock the 16-bit timer can be selected to be either the MCLKO signal or the MCLKO2 signal. See Section 2.2.6 for the operation details of the adaptive clock generator. Bit 7 6 5 4 3 2 1 0 Mnemonic CAP7 CAP6 CAP5 CAP4 CAP3 CAP2 CAP1 CAP0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 CAP(7:0) ACG MCLK capture The ACG MCLK capture bit values are updated by hardware each time a USB start of frame occurs. This register contains the least significant byte of the 16-bit value. 6.5.3.5 Adaptive Clock Generator MCLK Capture Register (High Byte) (ACGCAPH - Address FFE3h) The adaptive clock generator MCLK capture register (high byte) contains the most significant byte of the 16-bit codec master clock (MCLK) signal cycle count that is captured each time a USB start of frame (SOF) occurs. Bit 7 6 5 4 3 2 1 0 Mnemonic CAP15 CAP14 CAP13 CAP12 CAP11 CAP10 CAP9 CAP8 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 CAP(15:8) ACG MCLK capture The ACG MCLK capture bit values are updated by hardware each time a USB start of frame occurs. This register contains the most significant byte of the 16-bit value. 6.5.3.6 Adaptive Clock Generator2 Frequency Register (Byte 0) (ACG2FRQ0 - Address FFF9h) The adaptive clock generator control registers ACG2FRQ0, ACG2FRQ1, and ACG2FRQ2, contain the 24-bit value used to program the ACG2 frequency synthesizer. Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ7 FRQ6 FRQ5 FRQ4 FRQ3 FRQ2 FRQ1 FRQ0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(7:0) ACQ2 frequency The ACG2 frequency bit values are set by the MCU to program the ACG2 frequency synthesizer. 6.5.3.7 Adaptive Clock Generator2 Frequency Register (Byte 1) (ACG2FRQ1 - Address FFF8h) Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ15 FRQ14 FRQ13 FRQ12 FRQ11 FRQ10 FRQ9 FRQ8 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(15:8) ACQ2 frequency The ACG2 frequency bit values are set by the MCU to program the ACG2 frequency synthesizer. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 97 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.3.8 Adaptive Clock Generator2 Frequency Register (Byte 2) (ACG2FRQ2 - Address FFF7h) Bit 7 6 5 4 3 2 1 0 Mnemonic FRQ23 FRQ22 FRQ21 FRQ20 FRQ19 FRQ18 FRQ17 FRQ16 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 FRQ(23:16) ACQ2 frequency The ACG2 frequency bit values are set by the MCU to program the ACG2 frequency synthesizer. 6.5.3.9 Adaptive Clock Generator2 Divider Control Register (ACG2DCTL - Address FFF6h) Bit 7 6 5 4 3 2 1 0 Mnemonic DIVM3 DIVM2 DIVM1 DIVM0 - - - - Type R/W R/W R/W R/W R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The divide by M control bits are set by the MCU to program the ACG2 frequency divider. 7:4 DIVM(3:0) Divide by M value 0000b = divide by 1 0001b = divide by 2 ⋮ 1111b = divide by 16 3:0 - Reserved Reserved for future use 6.5.3.10 Adaptive Clock Generator1 Divider Control Register (ACG1DCTL - Address FFE2h) Bit 7 6 5 4 3 2 1 0 Mnemonic DIVM3 DIVM2 DIVM1 DIVM0 - DIVI2 DIVI1 DIVI0 Type R/W R/W R/W R/W R R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The divide by M control bits are set by the MCU to program the ACG1 frequency divider. 7:4 DIVM(3:0) Divide by M value 0000b = divide by 1 0001b = divide by 2 ⋮ 1111b = divide by 16 3 - Reserved Reserved for future use The divide by I control bits are set by the MCU to program the MCLKI divider. 000b = divide by 1 2:0 DIVI(2:0) Divide by I value 001b = divide by 2 ⋮ 111b = divide by 8 98 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.3.11 Adaptive Clock Generator Control Register (ACGCTL - Address FFE1h) Bit 7 6 5 4 3 2 1 0 Mnemonic MCLKO2EN MCLKO1EN - MCLKO1S1 MCLKO1S0 DIVEN MCLKO2S1 MCLKO2S0 Type R/W R/W R R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION This bit is set to 1 by the MCU to enable the MCLKO2 signal to be an output from the 7 MCLKO2EN MCLKO2 output enable TAS1020B device. If the MCLKO2 signal is not being used, then the MCU can clear this bit to 0 to set the output to logic 0. This bit is set to 1 by the MCU to enable the MCLKO1 signal to be an output from the 6 MCLKO1EN MCLKO1 output enable TAS1020B device. If the MCLKO1 signal is not being used, then the MCU can clear this bit to 0 to set the output to logic 0. 5 - Reserved Reserved for future use This bit in conjunction with MCLKO1S0, selects the source for MCLKO1. See the ACG block diagram (Figure 2-1). MCLKO1S1 MCLKO1S0 MCLKO1 4 MCLKO1S1 MCLKO1 clock select 0 0 acg_clk (after ÷M) x 1 mclki (after ÷I) 1 0 acg2_clk(after ÷M) 3 MCLKO1S0 MCLKO1 clock select See the description above. 2 DIVEN Divider enable The divider enable bit is set to 1 by the MCU to enable the divide-by-I and divide-by-M circuits. This bit in conjunction with MCLKO2S0, selects the MCLKO2. See the ACG block diagram (Figure 2-1). MCLKO2S1 MCLKO2S0 MCLKO2 1 MCLKO2S1 MCLKO2 clock select 0 0 acg_clk (after ÷M) x 1 mclki (after ÷I) 1 0 acg2_clk(after ÷M) 0 MCLKO2S0 MCLKO2 clock select See the description above. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 99 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.4 Codec Port Interface Registers This section describes the memory-mapped registers used for the codec port interface control and operation. The codec port interface has a set of ten registers. Note that the four codec port interface configuration registers can only be written to by the MCU if the codec port enable bit (CPTEN) in the global control register is a 0 - the codec port is disabled. 6.5.4.1 Codec Port Interface Configuration Register 1 (CPTCNF1 - Address FFE0h) The codec port interface configuration register 1 is used to store various control bits for the codec port interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic NTSL4 NTSL3 NTSL2 NTSL1 NTSL0 MODE2 MODE1 MODE0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The number of time slots bits are set by the MCU to program the number of time slots per audio frame. 7:3 NTSL(4:0) Number of time slots 00000b = Illegal 00001b = 2 time slots per frame ⋮ 01101 = 14 time slots per frame The mode select bits are set by the MCU to program the codec port interface mode of operation. In addition to selecting the desired mode of operation, the MCU must also program the other configuration registers to obtain the correct serial interface format. 000b = mode 0 - General-purpose mode 001b = mode 1 - AIC mode 2:0 MODE(2:0) Mode select 010b = mode 2 - AC ’97 1.x mode 011b = mode 3 - AC ’97 2.x mode 100b = mode 4 - I2S mode - 1 OUT and 2 IN at same frequency 101b = mode 5 - I2S mode - 1 OUT and 1 IN at different frequencies 110b = Reserved 111b = Reserved 100 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.4.2 Codec Port Interface Configuration Register 2 (CPTCNF2 - Address FFDFh) The codec port interface configuration register 2 is used to store various control bits for the codec port interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic TSL0L1 TSL0L0 BPTSL2 BPTSL1 BPTSL0 TSLL2 TSLL1 TSLL0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The time slot 0 Length bits are set by the MCU to program the number of serial clock (CSCLK) cycles for time slot 0. 7:6 TSL0L(1:0) Time slot 0 length 00b = CSCLK cycles for time slot 0 same as other time slots 01b = 8 CSCLK cycles for time slot 0 10b = 16 CSCLK cycles for time slot 0 11b = 32 CSCLK cycles for time slot 0 The data bits per time slot bits are set by the MCU to program the number of data bits per audio time slot. Note that this value in not used for the secondary communication address and data time slots. 000b = 8 data bits per time slot 001b = 16 data bits per time slot 5:3 BPTSL(2:0) Data bits per time slot 010b = 18 data bits per time slot 011b = 20 data bits per time slot 100b = 24 data bits per time slot 101b = 32 data bits per time slot 110b = reserved 111b = reserved The time slot length bits are set by the MCU to program the number of serial clock (CSCLK) cycles for all time slots except time slot 0. 000b = 8 CSCLK cycles per time slot 001b = 16 CSCLK cycles per time slot 2:0 TSLL(2:0) Time slot length 010b = 18 CSCLK cycles per time slot 011b = 20 CSCLK cycles per time slot 100b = 24 CSCLK cycles per time slot 101b = 32 CSCLK cycles per time slot 110b = reserved 111b = reserved Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 101 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.4.3 Codec Port Interface Configuration Register 3 (CPTCNF3 - Address FFDEh) The codec port interface configuration register 3 is used to store various control bits for the codec port interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic DDLY TRSEN CSCLKP CSYNCP CSYNCL BYOR CSCLKD CSYNCD Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 1 1 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The data delay bit is set to a 1 by the MCU to program a one CSCLK cycle delay of 7 DDLY Data delay the serial data output and input signals in reference to the leading edge of the CSYNC signal. The MCU must clear this bit to a 0 for no delay between these signals. The 3-state enable bit is set to a 1 by the MCU to program the hardware to set the serial data output signal to the high-impedance state for the time slots during the 6 TRSEN 3-State enable audio frame that are not valid. The MCU must clear this bit to a 0 to program the hardware to use zero-padding for the serial data output signal for time slots during the audio frame that are not valid. The CSCLK polarity bit is used by the MCU to program the clock edge used for the codec port interface frame sync (CSYNC) output signal, codec port interface serial data output (CDATO) signal and codec port interface serial data Input (CDATI) signal. When this bit is set to a 1, the CSYNC signal is generated with the negative edge of the codec port interface serial clock (CSCLK) signal. Also, when this bit is set to a 1, 5 CSCLKP CSCLK polarity the CDATO signal is generated with the negative edge of the CSCLK signal and the CDATI signal is sampled with the positive edge of the CSCLK signal. When this bit is cleared to a 0, the CSYNC signal is generated with the positive edge of the CSCLK signal. Also, when this bit is cleared to a 0, the CDATO signal is generated with the positive edge of the CSCLK signal and the CDATI signal is sampled with the negative edge of the CSCLK signal. The CSYNC polarity bit is set to a 1 by the MCU to program the polarity of the codec 4 CSYNCP CSYNC polarity port interface frame sync (CSYNC) output signal to be active high. The MCU must clear this bit to a 0 to program the polarity of the CSYNC output signal to be active low. The CSYNC length bit is set to a 1 by the MCU to program the length of the codec 3 CSYNCL CSYNC length port interface frame sync (CSYNC) output signal to be the same number of CSCLK cycles as time slot 0. The MCU must clear this bit to a 0 to program the length of the CSYNC output signal to be one CSCLK cycle. The byte order bit is used by the MCU to program the byte order for the data moved by the DMA between the USB endpoint buffer and the codec port interface. When this 2 BYOR Byte order bit is set to a 1, the byte order of each audio sample is reversed when the data is moved to/from the USB endpoint buffer. When this bit is cleared to a 0, the byte order of the each audio sample is unchanged. The CSCLK direction bit is set to a 1 by the MCU to program the direction of the codec port interface serial clock (CSCLK) signal as an input to the TAS1020B device. The MCU must clear this bit to a 0 to program the direction of the CSCLK signal as an 1 CSCLKD CSCLK direction output from the TAS1020B device. This bit can optionally be set to 1 to select 'Input' only when General Purpose Mode 1 has been selected. The CSYNC direction bit is set to a 1 by the MCU to program the direction of the codec port interface frame sync (CSYNC) signal as an input to the TAS1020B device. The MCU must clear this bit to a 0 to program the direction of the CSYNC signal as an 0 CSYNCD CSYNC direction output from the TAS1020B device. This bit can optionally be set to 1 to select 'Input' only when General Purpose Mode 1 has been selected. 102 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.4.4 Codec Port Interface Configuration Register 4 (CPTCNF4 - Address FFDDh) The codec port interface configuration register 4 is used to store various control bits for the codec port interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic ATSL3 ATSL2 ATSL1 ATSL0 CPTBLK DIVB2 DIVB1 DIVB0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The command/status address/data time slot bits are set by the MCU to program the time slots to be used for the secondary communication address and data values. For the AC ’97 modes of operation, this value must be set to 0001b which results in time slot 1 being used for the address and time slot 2 being used for the data. For the AIC Command/status and general-purpose modes of operation, the same time slot is used for both address 7:4 ATSL(3:0) address/data time slot and data. For the AIC mode of operation this value must be set to 0111b which results in time slot 7 being used for both the address and data. 0000b = time slot 0 0001b = time slot 1 ⋮ 1111b = time slot 15 This bit is used when C-port is in Mode 0. If this bit is cleared to 0, the C-port 3 CptBlk C-port bulk mode sync/clocks are free running once C-port is enabled. If this bit is set to 1, DMA controls the C-port sync/clocks. The sync/clocks are active only when valid data is present in a codec frame. The divide by B control bits are set by the MCU to program the divide ratio used to derive CSCLK from MCLKO. 000b = CSCLK output disabled 001b = divide by 2 2:0 DIVB(2:0) Divide by B value 010b = divide by 3 011b = divide by 4 100b = divide by 5 101b = divide by 6 110b = divide by 7 111b = divide by 8 Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 103 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.4.5 Codec Port Interface Control and Status Register (CPTCTL - Address FFDCh) The codec port interface control and status register contains various control and status bits used for the codec port interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic RXF RXIE TXE TXIE — CID1 CID0 CRST Type R R/W R R/W R R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The receive data register full bit is set to a 1 by hardware when a new data value has been received into the receive data register from the codec device. This bit is read 7 RXF Receive data register full only and is cleared to a 0 by hardware when the MCU reads the new value from the receive data register. Note that when the MCU writes to the interrupt vector register, the codec port interface receive data register full interrupt is cleared but this status bit is not cleared at that time. 6 RXIE Receive interrupt enable The receive interrupt enable bit is set to a 1 by the MCU to enable the C-port receive data register full interrupt. The transmit data register empty bit is set to a 1 by hardware when the data value in the transmit data register has been sent to the codec device. This bit is read only and 5 TXE Transmit data register is cleared to a 0 by hardware when a new data byte is written to the transmit data empty register by the MCU. Note that when the MCU writes to the interrupt vector register, the codec port interface transmit data register empty interrupt is cleared but this status bit is not cleared at that time. 4 TXIE Transmit interrupt The transmit interrupt enable bit is set to a 1 by the MCU to enable the codec port enable interface transmit data register empty interrupt. 3 — Reserved Reserved for future use The codec ID bits are used by the MCU to select between the primary codec device and the secondary codec device for secondary communication in the AC ’97 modes of 2:1 CID(1:0) Codec ID operation. When the bits are cleared to 00, the primary codec device is selected. When the bits are set to 01, 10 or 11, the secondary codec device is selected. Note that when only a primary codec device is connected to the TAS1020B, the bits remain cleared to 00. The codec reset bit is used by the MCU to control the codec port interface reset (CRESET) output signal from the TAS1020B device. When this bit is set to a 1, the CRESET signal is a high. When this bit is cleared to a 0, the CRESET signal is active 0 CRST Codec reset low. At power up this bit is cleared to a 0, which means the CRESET output signal is active low and remains active low until the MCU sets this bit to a 1. In I2S mode 5, this signal is not available because the CRESET pin becomes SCLK2, which is used to input data from a codec. 104 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.4.6 Codec Port Interface Address Register (CPTADR - Address FFDBh) The codec port interface address register contains the read/write control bit and address bits used for secondary communication between the TAS1020B MCU and the codec device. For write transactions to the codec, the 8-bit value in this register is sent to the codec in the designated time slot and appropriate bit locations. Note that for the different modes of operation, the number of address bits and the bit location of the read/write bit is different. For example, the AC ’97 modes require 7 address bits and the bit location of the read/write bit to be the most significant bit. The AIC mode only requires 4 address bits and the bit location of the read/write bit to be bit 13 of the 16-bits in the time slot. The MCU must load the read/write and address bits to the correct bit locations within this register for the different modes of operation. Shown below are the read/write control bit and address bits for the AC ’97 mode of operation. Bit 7 6 5 4 3 2 1 0 Mnemonic R/W A6 A5 A4 A3 A2 A1 A0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The command/status read/write control bit value is set by the MCU to program the 7 R/W Command/status type of secondary communication transaction to be done. This bit must be set to a 1 read/write control by the MCU for a read transaction and cleared to a 0 by the MCU for a write transaction. The command/status address value is set by the MCU to program the codec device 6:0 A(6:0) Command/status control/status register address to be accessed during the read or write transaction. address The command/status address value is updated by hardware with the control/status register address value received from the codec device for read transactions. 6.5.4.7 Codec Port Interface Data Register (Low Byte) (CPTDATL - Address FFDAh) The codec port interface data register (low byte) contains the least significant byte of the 16-bit command or status data value used for secondary communication between the TAS1020B MCU and the codec device. Note that for general-purpose mode or AIC mode only an 8-bit data value is used for secondary communication. Bit 7 6 5 4 3 2 1 0 Mnemonic D7 D6 D5 D4 D3 D2 D1 D0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The command/status data value is set by the MCU with the command data to be 7:0 D(7:0) Command/status data transmitted to the codec device for write transactions. The command/status data value is updated by hardware with the status data received from the codec device for read transactions. 6.5.4.8 Codec Port Interface Data Register (High Byte) (CPTDATH - Address FFD9h) The codec port interface data register (high byte) contains the most significant byte of the 16-bit command or status data value used for secondary communication between the TAS1020B MCU and the codec device. This register is not used for general-purpose mode or AIC mode since these modes only support an 8-bit data value for secondary communication. Bit 7 6 5 4 3 2 1 0 Mnemonic D15 D14 D13 D12 D11 D10 D9 D8 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The command/status data value is set by the MCU with the command data to be 7:0 D(15:8) Command/status data transmitted to the codec device for write transactions. The command/status data value is updated by hardware with the status data received from the codec device for read transactions. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 105 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.4.9 Codec Port Interface Valid Time Slots Register (Low Byte) (CPTVSLL - Address FFD8h) The codec port interface valid time slots register (low byte) contains the control bits used to specify which time slots in the audio frame contain valid data. This register is only used in the AC ’97 modes of operation. Bit 7 6 5 4 3 2 1 0 Mnemonic VTSL8 VTSL9 VTSL10 VTSL11 VTSL12 — — — Type R/W R/W R/W R/W R/W R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The valid time slot bits are set to a 1 by the MCU to define which time slots in the 7:3 VTSL(8:12) Valid time slot audio frame contain valid data. The MCU must clear to a 0 the bits corresponding to time slots that do not contain valid data. Note that bits 7 to 3 of this register correspond to time slots 8 to 12. 2:0 — Reserved Reserved for future use 6.5.4.10 Codec Port Interface Valid Time Slots Register (High Byte) (CPTVSLH - Address FFD7h) The codec port interface valid time slots register (high byte) contains the control bits used to specify which time slots in the audio frame contain valid data. In addition the valid frame, primary codec ready and secondary codec ready bits are contained in this register. This register is only used in the AC ’97 modes of operation. Bit 7 6 5 4 3 2 1 0 Mnemonic VF PCRDY SCRDY VTSL3 VTSL4 VTSL5 VTSL6 VTSL7 Type R/W R R R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The valid frame bit is set to a 1 by the MCU to indicate that the current audio frame 7 VF Valid frame contains at least one time slot with valid data. The MCU must clear this bit to a 0 to indicate that the current audio frame does not contain any time slots with valid data. The primary codec ready bit is updated by hardware each audio frame based on the 6 PCRDY Primary codec ready value of bit 15 in time slot 0 of the incoming serial data from the primary codec. This bit is set to a 1 to indicate the primary codec is ready for operation. The secondary codec ready bit is updated by hardware each audio frame based on 5 SCRDY Secondary codec ready the value of bit 15 in time slot 0 of the incoming serial data from the secondary codec. This bit is set to a 1 to indicate the secondary codec is ready for operation. Note that this bit is only used if a secondary codec is connected to the TAS1020B device. The valid time slot bits are set to a 1 by the MCU to define which time slots in the 4:0 VTSL(3:7) Valid time slot audio frame contain valid data. The MCU must clear to a 0 the bits corresponding to time slots that do not contain valid data. Note that bits 4 to 0 of this register correspond to time slots 3 to 7. 106 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.4.11 Codec Port Receive Interface Configuration Register 2 (CPTRXCNF2 - Address FFD6h) The codec port receive interface configuration register2 is only used in I2S Mode 5. Bit 7 6 5 4 3 2 1 0 Mnemonic - - BPTSL2 BPTSL1 BPTSL0 TSLL2 TSLL1 TSLL0 Type R R R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:6 — Reserved Reserved for future use The data bits per time slot bits are set by the MCU to program the number of data bits per audio time slot. Note that this value in not used for the secondary communication address and data time slots. 000b = 8 data bits per time slot 001b = 16 data bits per time slot 5:3 BPTSL(2:0) Data bits per time slot. 010b = 18 data bits per time slot 011b = 20 data bits per time slot 100b = 24 data bits per time slot 101b = 32 data bits per time slot 110b = reserved 111b = reserved The time slot length bits are set by the MCU to program the number of serial clock (SCLK2) cycles for all time slots. 000b = 8 SCLK2 cycles per time slot 001b = 16 SCLK2 cycles per time slot 2:0 TSLL(2:0) Time slot length 010b = 18 SCLK2 cycles per time slot 011b = 20 SCLK2 cycles per time slot 100b = 24 SCLK2 cycles per time slot 101b = 32 SCLK2 cycles per time slot 110b = reserved 111b= reserved Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 107 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.4.12 Codec Port Receive Interface Configuration Register 3 (CPTRXCNF3 - Address FFD5h) The codec port receive interface configuration register3 is only used in I2S Mode 5. Bit 7 6 5 4 3 2 1 0 Mnemonic DDLY TRSEN CSCLKP CSYNCP CSYNCL BYOR CSCLKD CSYNCD Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 1 1 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The data delay bit is set to 1 by the MCU to program a one SCLK2 cycle delay of the 7 DDLY Data delay serial data output and input signals in reference to the leading edge of the LRCK2 signal. The MCU must clear this bit to a 0 for no delay between these signals. The 3-state enable bit is set to a 1 by the MCU to program the hardware to set the serial data output signal to the high-impedance state for time slots during the audio 6 TRSEN 3-state enable frame that are not valid. The MCU must clear this bit to a 0 to program the hardware to use zero-padding for the serial data output signal for time slots during the audio frame that are not valid. The CSCLKP polarity bit is used by the MCU to program the clock edge used for the codec port interface frame sync (LRCK2) output signal and codec port interface serial data input (CDAT1) signal. When this bit is set to a 1, the LRCK2 signal is generated 5 CSCLKP CSCLK polarity with the negative edge of the codec port interface serial clock (SCLK2) signal. Also, when this bit is set a 1, the CDATI signal is sampled with the positive edge of the SCLK2 signal. When this bit is cleared to 0, the LRCK2 signal is generated with the positive edge of SCLK2 and the CDATI signal is sampled with the negative edge of the SCLK2 signal. The CSYNCP polarity bit is set to a 1 by the MCU to program the polarity of the codec 4 CSYNCP CSYNC polarity port interface frame sync (LRCK2) output signal to be active high. The MCU must clear this bit to a 0 to program the polarity of the LRCK2 output signal to be active low. The CSYNCL polarity bit is set to a 1 by the MCU to program the length of the codec 3 CSYNCL CSYNC length port interface frame sync (LRCK2) output signal to be the same number of SCLK2 cycles as time slot 0. The MCU must clear this bit to a 0 to program the length of the LRCK2 output signal to be one SCLK2 cycle. The byte order bit is used by the MCU to program the byte order for the data moved by the DMA between the USB endpoint buffer and the codec port interface. When this 2 BYOR Byte order bit is set to a 1, the byte order of each audio sample is reversed when the data is moved to/from the USB endpoint buffer. When this bit is cleared to a 0, the byte order of the each audio sample is unchanged. The SCLK2 direction bit is set to a 1 by the MCU to program the direction of the codec 1 CSCLKD CSCLK direction port interface serial clock (SCLK2) signal as an input of the TAS1020B device. The MCU must clear this bit to a 0 to program the direction of the CSCLK signal as an output from the TAS1020B device. The SCLK2 direction bit is set to a 1 by the MCU to program the direction of the codec 0 CSYNCD CSYNC direction port interface frame sync (LRCK2) signal as an input of the TAS1020B device. The MCU must clear this bit to a 0 to program the direction of the LRCK2 signal as an output from the TAS1020B device. 108 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.4.13 Codec Port Receive Interface Configuration Register 4 (CPTRXCNF4 - Address FFD4h) The codec port receive interface configuration register 4 is only used in I2S Mode 5. Bit 7 6 5 4 3 2 1 0 Mnemonic - - - - - DIVB22 DIVB21 DIVB20 Type R R R R R R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:3 — Reserved Reserved for future use The divide by B2 control bits are set by the MCU to program the divide ratio used to derive SCLK2 from MCLKO2. 000b = SCLK2 output disabled 001b = divide by 2 2:0 DIVB2(2:0) Divide by B2 value 010b = divide by 3 011b = divide by 4 100b = divide by 5 101b = divide by 6 110b = divide by 7 111b = divide by 8 6.5.5 P3 Mask Register Mask register for P3 to enable the wake-up function for these pins when the device is in low-power mode. 6.5.5.1 P3 Mask Register (P3MSK - Address FFCAh) Bit 7 6 5 4 3 2 1 0 Mnemonic P3MSK7 P3MSK6 P3MSK5 P3MSK4 P3MSK3 P3MSK2 P3MSK1 P3MSK0 Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 P3MSK(7:0) 0 = Unmasked 1 = Masked Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 109 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.6 I2C Interface Registers This section describes the memory-mapped registers used for the I2C Interface control and operation. The I2C interface has a set of four registers. See Section 2.2.14 for the operation details of the I2C interface. 6.5.6.1 I2C Interface Address Register (I2CADR - Address FFC3h) The I2C interface address register contains the 7-bit I2C slave device address and the read/write transaction control bit. Bit 7 6 5 4 3 2 1 0 Mnemonic A6 A5 A4 A3 A2 A1 A0 RW Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The address bit values are set by the MCU to program the 7-bit I2C slave address of the device to be accessed. Each I2 7:1 A(6:0) Address C slave device must have a unique address on the I2C bus. This address is used to identify the device on the bus to be accessed and is not the internal memory address to be accessed within the device. The read/write control bit value is set by the MCU to program the type of I2C 0 RW Read/write control transaction to be done. This bit must be set to a 1 by the MCU for a read transaction and cleared to a 0 by the MCU for a write transaction. 6.5.6.2 I2C Interface Receive Data Register (I2CDATI - Address FFC2h) The I2C interface receive data register contains the most recent data byte received from the slave device. Bit 7 6 5 4 3 2 1 0 Mnemonic RXD7 RXD6 RXD5 RDXD4 RXD3 RXD2 RXD1 RXD0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 RXD(7:0) Receive data The receive data byte value is updated by hardware for each data byte received from the I2C slave device. 6.5.6.3 I2C Interface Transmit Data Register (I2CDATO - Address FFC1h) The I2C interface transmit data register contains the next address or data byte to be transmitted to the slave device in accordance with the protocol. Note that for both read and write transactions, the internal register or memory address of the slave device being accessed must be transmitted to the slave device. Bit 7 6 5 4 3 2 1 0 Mnemonic TXD7 TXD6 TXD5 TXD4 TXD3 TXD2 TXD1 TXD0 Type W W W W W W W W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7:0 TXD(7:0) Transmit data The transmit data byte value is set by the MCU for each address or data byte to be transmitted to the I2C slave device. 110 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.6.4 I2C Interface Control and Status Register (I2CCTL - Address FFC0h) The I2C interface control and status register contains various control and status bits used for the I2C interface operation. Bit 7 6 5 4 3 2 1 0 Mnemonic RXF RXIE ERR FRQ TXE TXIE STPRD STPWR Type R R/W R/W R/W R R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The receive data register full bit is set to a 1 by hardware when a new data byte has been received into the receive data register from the slave device. This bit is read only 7 RXF Receive data register full and is cleared to a 0 by hardware when the MCU reads the new byte from the receive data register. Note that when the MCU writes to the interrupt vector register, the I2C receive data register full interrupt is cleared but this status bit is not cleared at that time. 6 RXIE Receive interrupt enable The receive interrupt enable bit is set to a 1 by the MCU to enable the I2C receive data register full interrupt. 5 ERR Error condition The error condition bit is set to a 1 by hardware when the slave device does not respond. This bit is read/write and can only be cleared by the MCU. The frequency select bit is used by the MCU to program the I2C serial clock (SCL) 4 FRQ Frequency select output signal frequency. A value of 0 sets the SCL frequency to 100 kHz and a value of 1 sets the SCL frequency to 400 kHz. The transmit data register empty bit is set to a 1 by hardware when the data byte in the transmit data register has been sent to the slave device. This bit is read only and 3 TXE Transmit data register is cleared to a 0 by hardware when a new data byte is written to the transmit data empty register by the MCU. Note that when the MCU writes to the interrupt vector register, the I2C transmit data register empty interrupt is cleared but this status bit is not cleared at that time. 2 TXIE Transmit interrupt The transmit interrupt enable bit is set to a 1 by the MCU to enable the I2C transmit enable data register empty interrupt. The stop read transaction bit is set to a 1 by the MCU to enable the hardware to 1 STPRD Stop - read transaction generate a stop condition on the I2C bus after the next data byte from the slave device is received into the receive data register. The MCU must clear this bit to a 0 after the read transaction has concluded. The stop write transaction bit is set to a 1 by the MCU to enable the hardware to 0 STPWR Stop - write transaction generate a stop condition on the I2C bus after the data byte in the transmit data register is sent to the slave device. The MCU must clear this bit to a 0 after the write transaction has concluded. Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 111 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.7 Miscellaneous Registers This section describes the memory-mapped registers used for the control and operation of miscellaneous functions in the TAS1020B device. The registers include the USB OUT endpoint interrupt register, the USB IN endpoint interrupt register, the interrupt vector register, the global control register, and the memory configuration register. 6.5.7.1 USB OUT endpoint Interrupt Register (OEPINT - Address FFB4h) The USB OUT endpoint interrupt register contains the interrupt pending status bits for the USB OUT endpoints. These bits do not apply to the USB isochronous endpoints. Also, these bits are read only by the MCU and are used for diagnostic purposes only. Bit 7 6 5 4 3 2 1 0 Mnemonic OEPI7 OEPI6 OEPI5 OEPI4 OEPI3 OEPI2 OEPI1 OEPI0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The OUT endpoint interrupt status bit for a particular USB OUT endpoint is set to a 1 by the UBM when a successful completion of a transaction occurs to that OUT 7:0 OEPI(7:0) OUT endpoint interrupt endpoint. When a bit is set, an interrupt to the MCU is generated and the corresponding interrupt vector results. The status bit is cleared when the MCU writes to the interrupt vector register. These bits do not apply to isochronous OUT endpoints. 6.5.7.2 USB IN endpoint Interrupt Register (IEPINT - Address FFB3h) The USB IN endpoint interrupt register contains the interrupt pending status bits for the USB IN endpoints. These bits do not apply to the USB isochronous endpoints. Also, these bits are read only by the MCU and are used for diagnostic purposes only. Bit 7 6 5 4 3 2 1 0 Mnemonic IEPI7 IEPI6 IEPI5 IEPI4 IEPI3 IEPI2 IEPI1 IEPI0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The IN endpoint interrupt status bit for a particular USB IN endpoint is set to a 1 by the UBM when a successful completion of a transaction occurs to that IN endpoint. When 7:0 IEPI(7:0) IN endpoint interrupt a bit is set, an interrupt to the MCU is generated and the corresponding interrupt vector results. The status bit is cleared when the MCU writes to the interrupt vector register. These bits do not apply to isochronous IN endpoints. 112 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B www.ti.com SLES025B–JANUARY 2002–REVISED MAY 2011 6.5.7.3 Interrupt Vector Register (VECINT - Address FFB2h) The interrupt vector register contains a 6-bit vector value that identifies the interrupt source for the INT0 input to the MCU. All of the TAS1020B internal interrupt sources and the external interrupt input to the device are ORed together to generate the internal INT0 signal to the MCU. When there is not an interrupt pending, the interrupt vector value is set to 24h. To clear any interrupt and update the interrupt vector value to the next pending interrupt, the MCU should simply write any value to this register. The interrupt priority is fixed in order, ranging from vector value 1Fh with the highest priority to vector value 00h with the lowest priority. An exception to this priority is the control endpoint EP0 which has top priority. Bit 7 6 5 4 3 2 1 0 Mnemonic — — IVEC5 IVEC4 IVEC3 IVEC2 IVEC1 IVEC0 Type R R R R R R R R Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION 7 — Reserved Reserved for future use 6 — Reserved Reserved for future use 00h = USB OUT endpoint 0 10h = USB setup stage transaction 01h = USB OUT endpoint 1 over-write 02h = USB OUT endpoint 2 11h = Reserved 03h = USB OUT endpoint 3 12h = USB setup stage transaction 04h = USB OUT endpoint 4 13h = USB pseudo start-of-frame 05h = USB OUT endpoint 5 14h = USB start-of-frame 06h = USB OUT endpoint 6 15h = USB function resume 07h = USB OUT endpoint 7 16h = USB function suspend 5:0 IVEC(5:0) Interrupt vector 08h = USB IN endpoint 0 17h = USB function reset 09h = USB IN endpoint 1 18h = C-port receive data register full 0Ah = USB IN endpoint 2 19h = C-port transmit data register empty 0Bh = USB IN endpoint 3 1Ah = Reserved 0Ch = USB IN endpoint 4 1Bh = Reserved 0Dh = USB IN endpoint 5 1Ch = I2C receive data register full 0Eh = USB IN endpoint 6 1Dh = I2C transmit data register empty 0Fh = USB IN endpoint 7 1Eh = Reserved1Fh = External interrupt input 20h = DMA Ch.0 interrupt 24h = No interrupt pending 21h = DMA Ch.1 interrupt 25h - 3Fh = Reserved 22h - 23h = Reserved Copyright © 2002–2011, Texas Instruments Incorporated MCU Memory and Memory-Mapped Registers 113 Submit Documentation Feedback Product Folder Link(s): TAS1020B TAS1020B SLES025B–JANUARY 2002–REVISED MAY 2011 www.ti.com 6.5.7.4 Global Control Register (GLOBCTL - Address FFB1h) The global control register contains various global control bits for the TAS1020B device. Bit 7 6 5 4 3 2 1 0 Mnemonic MCUCLK XINTEN P1PUDIS VREN RESET LPWR P3PUDIS CPTEN Type R/W R/W R/W R/W R/W R/W R/W R/W Default 0 0 0 0 0 0 0 0 BIT MNEMONIC NAME DESCRIPTION The MCU clock select bit is used by the MCU to program the clock frequency to be used for the MCU operation. 7 MCUCLK MCU clock select 0b = 12 MHz 1b = 24 MHz POR (Power On Reset) value is 0 (12 MHz). Setting this bit to 1 will change MCU clock frequency to 24 MHz. But, once set, this bit can only be cleared by master reset. 6 XINTEN External interrupt enable The external interrupt enable bit is set to a 1 by the MCU to enable the use of the external interrupt input to the TAS1020B device. 5 P1PUDIS Pullup resistor disable If set to 1, disables on-chip pullup resistors on P1 GPIO pins. 4 VREN VREN Memory-mapped GPIO pin 3 RESET RESET Memory-mapped GPIO pin The low power mode disable bit is used by the MCU to put the TAS1020B into a 2 LPWR Low power mode semi-low power state. When this bit is cleared to a 0, all USB functional blocks are powered down. For normal operation, the MCU must set this bit to a 1. 1 P3PUDIS Pullup resistor disable If set to 1, disables on-chip pullup resistors on P3 GPIO pins. The codec port enable bit is set to a 1 by the MCU to enable the operation of the 0 CPTEN Codec port enable codec port interface. Note that the codec port interface configuration registers must be fully programmed before this bit is set by the MCU. 6.5.7.5 Memory Configuration Register (MEMCFG - Address FFB0h) The memory configuration register contains various bits pertaining to the memory configuration of the TAS1020B device. Bit 7 6 5 4 3 2 1 0 Mnemonic MEMTYP CODESZ1 CODESZ0 REV3 REV2 REV1 REV0 SDW Type R R R R R R R R/W Default 1 0 1 0 0 0 1 0 BIT MNEMONIC NAME DESCRIPTION The code memory type bit identifies if the type of memory used for the application 7 MEMTYP Code memory type program code space is ROM or RAM. For the TAS1020B, an 8K byte RAM is used and this bit is tied to 1. The code space size bits identify the size of the application program code memory space. For the TAS1020B, an 8K byte RAM is used and these bits are tied to 01b. 6:5 CODESZ(1:0) Code space size 00b = 4K bytes 01b = 8K bytes 10b = 16K bytes 11b = 32K bytes The IC revision bits identify the revision of the IC. 0000b = Rev. - 4:1 REV(3:0) IC revision 0001b = Rev. A ⋮ 1111b = Rev. F The shadow the boot ROM bit is set to a 1 by the MCU to switch the MCU memory 0 SDW Shadow the boot ROM configuration from boot loader mode to normal operating mode. This must occur after completion of the download of the application program code by the boot ROM. See the SDW protection bit in USBCTL register. 114 MCU Memory and Memory-Mapped Registers Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B PACKAGE OPTION ADDENDUM www.ti.com 23-Nov-2011 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) TAS1020BPFB NRND TQFP PFB 48 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TAS1020BPFBG4 NRND TQFP PFB 48 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TAS1020BPFBR NRND TQFP PFB 48 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TAS1020BPFBRG4 NRND TQFP PFB 48 1000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. 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TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant TAS1020BPFBR TQFP PFB 48 1000 330.0 16.4 9.6 9.6 1.5 12.0 16.0 Q2 PACKAGE MATERIALS INFORMATION www.ti.com 16-Feb-2012 Pack Materials-Page 1 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TAS1020BPFBR TQFP PFB 48 1000 336.6 336.6 31.8 PACKAGE MATERIALS INFORMATION www.ti.com 16-Feb-2012 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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Following are URLs where you can obtain information on other Texas Instruments products and application solutions: Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap Wireless Connectivity www.ti.com/wirelessconnectivity TI E2E Community Home Page e2e.ti.com Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1  2-V to 5.5-V VCC Operation  Support Mixed-Mode Voltage Operation on All Ports  High On-Off Output-Voltage Ratio  Low Crosstalk Between Switches  Individual Switch Controls  Extremely Low Input Current  Latch-Up Performance Exceeds 250 mA Per JESD 17  ESD Protection Exceeds JESD 22 − 2000-V Human-Body Model (A114-A) − 200-V Machine Model (A115-A) − 1000-V Charged-Device Model (C101) description/ordering information These triple 2-channel CMOS analog multiplexers/demultiplexers are designed for 2-V to 5.5-V VCC operation. The ’LV4053A devices handle both analog and digital signals. Each channel permits signals with amplitudes up to 5.5 V (peak) to be transmitted in either direction. Applications include signal gating, chopping, modulation or demodulation (modem), and signal multiplexing for analog-to-digital and digital-to-analog conversion systems. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube of 25 SN74LV4053AN SN74LV4053AN QFN − RGY Reel of 1000 SN74LV4053ARGYR LW053A SOIC D Tube of 40 SN74LV4053AD − LV4053A Reel of 2500 SN74LV4053ADR 40°C to 85°C SOP − NS Reel of 2000 SN74LV4053ANSR 74LV4053A −SSOP − DB Reel of 2000 SN74LV4053ADBR LW053A Tube of 90 SN74LV4053APW TSSOP − PW Reel of 2000 SN74LV4053APWR LW053A Reel of 250 SN74LV4053APWT TVSOP − DGV Reel of 2000 SN74LV4053ADGVR LW053A 55°C to 125°C CDIP − J Tube of 25 SNJ54LV4053AJ SNJ54LV4053AJ −CFP − W Tube of 150 SNJ54LV4053AW SNJ54LV4053AW † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. UNLESS OTHERWISE NOTED this document contains PRODUCTION Copyright © 2005, Texas Instruments Incorporated DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 2Y1 2Y0 3Y1 3-COM 3Y0 INH GND GND VCC 2-COM 1-COM 1Y1 1Y0 A B C SN54LV4053A . . . J OR W PACKAGE SN74LV4053A . . . D, DB, DGV, N, NS, OR PW PACKAGE (TOP VIEW) SN74LV4053A . . . RGY PACKAGE (TOP VIEW) 1 16 8 9 2 3 4 5 6 7 15 14 13 12 11 10 2-COM 1-COM 1Y1 1Y0 A B 2Y0 3Y1 3-COM 3Y0 INH GND 2Y1 C V GND CC SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 FUNCTION TABLE INPUTS ON CHANNELS INH C B A L L L L 1Y0, 2Y0, 3Y0 L L L H 1Y1, 2Y0, 3Y0 L L H L 1Y0, 2Y1, 3Y0 L L H H 1Y1, 2Y1, 3Y0 L H L L 1Y0, 2Y0, 3Y1 L H L H 1Y1, 2Y0, 3Y1 L H H L 1Y0, 2Y1, 3Y1 L H H H 1Y1, 2Y1, 3Y1 H X X X None logic diagram (positive logic) 1Y0 1Y1 2Y0 2Y1 3Y0 1-COM INH B A 3-COM 3Y1 2-COM C 11 10 9 6 15 14 12 13 2 1 5 3 4 SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V Switch I/O voltage range, VIO (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20 mA I/O diode current, IIOK (VIO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA Switch through current, IT (VIO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, θJA (see Note 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W (see Note 3): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82°C/W (see Note 3): DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°C/W (see Note 3): NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W (see Note 3): PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W (see Note 4): RGY package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. 2. This value is limited to 5.5 V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51-7. 4. The package thermal impedance is calculated in accordance with JESD 51-5. recommended operating conditions (see Note 5) SN54LV4053A SN74LV4053A UNIT MIN MAX MIN MAX VCC Supply voltage 2‡ 5.5 2‡ 5.5 V VCC = 2 V 1.5 1.5 V High level input voltage control inputs VCC = 2.3 V to 2.7 V VCC × 0.7 VCC × 0.7 VIH High-voltage, V VCC = 3 V to 3.6 V VCC × 0.7 VCC × 0.7 VCC = 4.5 V to 5.5 V VCC × 0.7 VCC × 0.7 VCC = 2 V 0.5 0.5 V Low level input voltage control inputs VCC = 2.3 V to 2.7 V VCC × 0.3 VCC × 0.3 VIL Low-voltage, V VCC = 3 V to 3.6 V VCC × 0.3 VCC × 0.3 VCC = 4.5 V to 5.5 V VCC × 0.3 VCC × 0.3 VI Control input voltage 0 5.5 0 5.5 V VIO Input/output voltage 0 VCC 0 VCC V VCC = 2.3 V to 2.7 V 200 200 Δt/Δv Input transition rise or fall rate VCC = 3 V to 3.6 V 100 100 ns/V VCC = 4.5 V to 5.5 V 20 20 TA Operating free-air temperature −55 125 −40 85 °C ‡ With supply voltages at or near 2 V, the analog switch on-state resistance becomes very nonlinear. It is recommended that only digital signals be transmitted at these low supply voltages. NOTE 5: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST V TA = 25°C SN54LV4053A SN74LV4053A UNIT CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX IT = 2 mA, 2.3 V 41 180 225 225 ron On-state T , VI = VCC or GND, VINH = VIL on 3 V 30 150 190 190 Ω switch resistance (see Figure 1) 4.5 V 23 75 100 100 IT = 2 mA, 2.3 V 139 500 600 600 ron(p) Peak on-state resistance on VI = VCC to GND, 3 V 63 180 225 225 Ω VINH = VIL 4.5 V 35 100 125 125 Difference in IT = 2 mA, 2.3 V 2 30 40 40 Δron on-state resistance on VI = VCC to GND, 3 V 1.6 20 30 30 Ω between switches VINH = VIL 4.5 V 1.3 15 20 20 II Control input current VI = 5.5 V or GND 0 to 5.5 V ±0.1 ±1 ±1 μA IS(off) Off-state switch leakage current VI = VCC and VO = GND, or VI = GND and VO = VCC, VINH = VIH (see Figure 2) 5.5 V ±0.1 ±1 ±1 μA IS(on) On-state switch leakage current VI = VCC or GND, VINH = VIH (see Figure 3) 5.5 V ±0.1 ±1 ±1 μA ICC Supply current VI = VCC or GND 5.5 V 20 20 μA CIC Control input capacitance 2 pF CIS Common terminal capacitance 8.2 pF COS Switch terminal capacitance 5.6 pF CF Feedthrough capacitance 0.5 pF switching characteristics over recommended operating free-air temperature range, VCC = 2.5 V ± 0.2 V (unless otherwise noted) PARAMETER FROM TO TEST TA = 25°C SN54LV4053A SN74LV4053A UNIT (INPUT) (OUTPUT) CONDITIONS MIN TYP MAX MIN MAX MIN MAX tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 15 pF (see Figure 4) 2.5 10 16 16 ns tPZH tPZL Enable delay time INH COM or Yn CL = 15 pF (see Figure 5) 7.6 18 23 23 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 15 pF (see Figure 5) 7.7 18 23 23 ns tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 50 pF (see Figure 4) 4.4 12 18 18 ns tPZH tPZL Enable delay time INH COM or Yn CL = 50 pF (see Figure 5) 8.8 28 35 35 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 50 pF (see Figure 5) 11.7 28 35 35 ns PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) PARAMETER FROM TO TEST TA = 25°C SN54LV4053A SN74LV4053A UNIT (INPUT) (OUTPUT) CONDITIONS MIN TYP MAX MIN MAX MIN MAX tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 15 pF (see Figure 4) 1.6 6 10 10 ns tPZH tPZL Enable delay time INH COM or Yn CL = 15 pF (see Figure 5) 5.3 12 15 15 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 15 pF (see Figure 5) 6.1 12 15 15 ns tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 50 pF (see Figure 4) 2.9 9 12 12 ns tPZH tPZL Enable delay time INH COM or Yn CL = 50 pF (see Figure 5) 6.1 20 25 25 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 50 pF (see Figure 5) 8.9 20 25 25 ns switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) PARAMETER FROM TO TEST TA = 25°C SN54LV4053A SN74LV4053A UNIT (INPUT) (OUTPUT) CONDITIONS MIN TYP MAX MIN MAX MIN MAX tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 15 pF (see Figure 4) 0.9 4 7 7 ns tPZH tPZL Enable delay time INH COM or Yn CL = 15 pF (see Figure 5) 3.8 8 10 10 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 15 pF (see Figure 5) 4.6 8 10 10 ns tPLH tPHL Propagation delay time COM or Yn Yn or COM CL = 50 pF (see Figure 4) 1.8 6 8 8 ns tPZH tPZL Enable delay time INH COM or Yn CL = 50 pF (see Figure 5) 4.3 14 18 18 ns tPHZ tPLZ Disable delay time INH COM or Yn CL = 50 pF (see Figure 5) 6.3 14 18 18 ns PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 analog switch characteristics PARAMETER FROM TO TEST CONDITIONS V TA = 25°C UNIT (INPUT) (OUTPUT) VCC TYP CL = 50 pF, 2.3 V 30 Frequency response COM or Yn Yn or COM L p , RL = 600 Ω, fi = 1 MHz (sine wave) 3 V 35 MHz (switch on) fin (see Note 6 and Figure 6) 4.5 V 50 CL = 50 pF, 2.3 V −45 Crosstalk COM or Yn Yn or COM p , RL = 600 Ω, fin = 1 MHz (sine wave) 3 V −45 dB (between any switches) (see Note 7 and Figure 7) 4.5 V −45 CL = 50 pF, 2.3 V 20 Crosstalk (control input to signal output) INH COM or Yn p , RL = 600 Ω, fin = 1 MHz (square wave) 3 V 35 mV (see Figure 8) 4.5 V 65 CL = 50 pF, 2.3 V −45 Feedthrough attenuation COM or Yn Yn or COM p , RL = 600 Ω, fin = 1 MHz 3 V −45 dB (switch off) (see Note 7 and Figure 9) 4.5 V −45 CL = 50 pF, RL = 10 kΩ VI = 2 Vp-p 2.3 V 0.1 Sine-wave distortion COM or Yn Yn or COM kΩ, fin = 1 kHz ( i ) VI = 2.5 Vp-p 3 V 0.1 % sine wave) (see Figure 10) VI = 4 Vp-p 4.5 V 0.1 NOTES: 6. Adjust fin voltage to obtain 0-dBm output. Increase fin frequency until dB meter reads −3 dB. 7. Adjust fin voltage to obtain 0-dBm input. operating characteristics, VCC = 3.3 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance CL = 50 pF, f = 10 MHz 5.3 pF PARAMETER MEASUREMENT INFORMATION VCC VI = VCC or GND VINH = VIL 2 mA VO ron  VI – VO 2 10–3  VI − VO VCC GND (ON) V Figure 1. On-State Resistance Test Circuit SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 PARAMETER MEASUREMENT INFORMATION VINH = VIH VI VO Condition 1: VI = 0, VO = VCC Condition 2: VI = VCC, VO = 0 A VCC VCC GND (OFF) Figure 2. Off-State Switch Leakage-Current Test Circuit VCC VINH = VIL VI Open VCC GND A (ON) VI = VCC or GND Figure 3. On-State Switch Leakage-Current Test Circuit VCC VINH = VIL Input Output 50 Ω CL VCC GND (ON) Figure 4. Propagation Delay Time, Signal Input to Signal Output SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION CL VCC VO TEST CIRCUIT VOLTAGE WAVEFORMS 1 kΩ S1 S2 tPLZ/tPZL tPHZ/tPZH GND VCC TEST S1 S2 VCC GND VINH 50 Ω 50% VOL + 0.3 V tPZH tPHZ 50% 50% 50% tPZL 50% VCC VO 50% 0 V VOL VINH (tPZL, tPZH) (tPLZ, tPHZ) VCC VO 0 V VOL VINH VCC 0 V VOH VCC 0 V ≈0 V VOH VOH − 0.3 V ≈0 V ≈VCC ≈VCC GND VCC VI tPLZ Figure 5. Switching Time (tPZL, tPLZ, tPZH, tPHZ), Control to Signal Output VO RL CL VCC 50 Ω fin VINH = GND 0.1 μF VCC GND (ON) NOTE A: fin is a sine wave. VCC/2 Figure 6. Frequency Response (Switch On) SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 PARAMETER MEASUREMENT INFORMATION VO1 RL CL VCC 50 Ω fin VCC/2 VINH = GND 0.1 μF VO2 VCC VCC/2 VINH = VCC 600 Ω VCC GND (ON) VCC GND (OFF) 600 Ω RL CL fin Figure 7. Crosstalk Between Any Two Switches VO VCC VCC GND RL CL VCC/2 VCC/2 50 Ω VINH 600 Ω Figure 8. Crosstalk Between Control Input and Switch Output VO RL CL VCC VCC/2 VINH = VCC 0.1 μF fin VCC/2 50 Ω 600 Ω VCC GND (OFF) Figure 9. Feedthrough Attenuation (Switch Off) SN54LV4053A, SN74LV4053A TRIPLE 2-CHANNEL ANALOG MULTIPLEXERS/DEMULTIPLEXERS SCLS430K − MAY 1999 − REVISED APRIL 2005 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION VO RL CL VCC VCC/2 VINH = GND 10 μF fin VCC GND (ON) 600 Ω 10 μF Figure 10. Sine-Wave Distortion PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples SN74LV4053AD ACTIVE SOIC D 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LV4053A SN74LV4053ADBR ACTIVE SSOP DB 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053ADE4 ACTIVE SOIC D 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LV4053A SN74LV4053ADG4 ACTIVE SOIC D 16 40 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LV4053A SN74LV4053ADGVR ACTIVE TVSOP DGV 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053ADGVRG4 ACTIVE TVSOP DGV 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053ADR ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 LV4053A SN74LV4053ADRG4 ACTIVE SOIC D 16 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LV4053A SN74LV4053AN ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 SN74LV4053AN SN74LV4053ANE4 ACTIVE PDIP N 16 25 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type -40 to 85 SN74LV4053AN SN74LV4053ANSR ACTIVE SO NS 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 74LV4053A SN74LV4053APW ACTIVE TSSOP PW 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053APWG4 ACTIVE TSSOP PW 16 90 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053APWR ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053APWRE4 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053APWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A SN74LV4053APWT ACTIVE TSSOP PW 16 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 85 LW053A PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 Addendum-Page 2 Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/Ball Finish (6) MSL Peak Temp (3) Op Temp (°C) Device Marking (4/5) Samples SN74LV4053ARGYR ACTIVE VQFN RGY 16 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR -40 to 85 LW053A (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SN74LV4053A : PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2014 Addendum-Page 3 • Automotive: SN74LV4053A-Q1 • Enhanced Product: SN74LV4053A-EP NOTE: Qualified Version Definitions: • Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects • Enhanced Product - Supports Defense, Aerospace and Medical Applications TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant SN74LV4053ADBR SSOP DB 16 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1 SN74LV4053ADGVR TVSOP DGV 16 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1 SN74LV4053ADR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 SN74LV4053ADR SOIC D 16 2500 330.0 16.8 6.5 10.3 2.1 8.0 16.0 Q1 SN74LV4053ADRG4 SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1 SN74LV4053ANSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1 SN74LV4053APWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74LV4053APWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74LV4053APWRG4 TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74LV4053APWT TSSOP PW 16 250 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74LV4053ARGYR VQFN RGY 16 3000 330.0 12.4 3.8 4.3 1.5 8.0 12.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 29-Apr-2014 Pack Materials-Page 1 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74LV4053ADBR SSOP DB 16 2000 367.0 367.0 38.0 SN74LV4053ADGVR TVSOP DGV 16 2000 367.0 367.0 35.0 SN74LV4053ADR SOIC D 16 2500 333.2 345.9 28.6 SN74LV4053ADR SOIC D 16 2500 364.0 364.0 27.0 SN74LV4053ADRG4 SOIC D 16 2500 333.2 345.9 28.6 SN74LV4053ANSR SO NS 16 2000 367.0 367.0 38.0 SN74LV4053APWR TSSOP PW 16 2000 364.0 364.0 27.0 SN74LV4053APWR TSSOP PW 16 2000 367.0 367.0 35.0 SN74LV4053APWRG4 TSSOP PW 16 2000 367.0 367.0 35.0 SN74LV4053APWT TSSOP PW 16 250 367.0 367.0 35.0 SN74LV4053ARGYR VQFN RGY 16 3000 367.0 367.0 35.0 PACKAGE MATERIALS INFORMATION www.ti.com 29-Apr-2014 Pack Materials-Page 2 MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 14 3,70 3,50 4,90 5,10 20 DIM PINS ** 4073251/E 08/00 1,20 MAX Seating Plane 0,05 0,15 0,25 0,50 0,75 0,23 0,13 1 12 24 13 4,30 4,50 0,16 NOM Gage Plane A 7,90 7,70 16 24 38 4,90 3,70 5,10 3,50 A MAX A MIN 6,60 6,20 11,20 11,40 56 9,60 9,80 48 0,08 0,40 0,07 M 0°–8° NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side. D. Falls within JEDEC: 24/48 Pins – MO-153 14/16/20/56 Pins – MO-194 MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 4040065 /E 12/01 28 PINS SHOWN Gage Plane 8,20 7,40 0,55 0,95 0,25 38 12,90 12,30 28 10,50 24 8,50 Seating Plane 7,90 9,90 30 10,50 9,90 0,38 5,60 5,00 15 0,22 14 A 28 1 16 20 6,50 6,50 14 0,05 MIN 5,90 5,90 DIM A MAX A MIN PINS ** 2,00 MAX 6,90 7,50 0,65 0,15 M 0°–8° 0,10 0,09 0,25 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. C. Body dimensions do not include mold flash or protrusion not to exceed 0,15. D. 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It allows you to program, debug, and analyze your applications using its unique streaming trace technology. ULINKpro, together with MDK-ARM, provides extended on-the-fly debug capabilities for Cortex-M devices. You are able to control the processor, set breakpoints, and read/write memory contents, all while the processor is running at full speed. High-Speed data and instruction trace are streamed directly to your PC enabling you to analyze detailed program behaviour. Features  Supports ARM7, ARM9, Cortex-M0, Cortex-M1, Cortex-M3, and Cortex-M4 devices  JTAG support for ARM7, ARM9, and Cortex-M  Serial Wire Debug (SWD) support for Cortex-M  Serial Wire Viewer (SWV) Data and Event Trace for Cortex-M up to 100Mbit/s (Manchester mode)  Instruction Trace (ETM) for Cortex-M3 and Cortex-M4 up to 800Mbit/s  Unique Streaming Trace direct to your PC, provides unlimited trace buffer  JTAG Clock Speed up to 50MHz  Supports Cortex-M devices running at up to 200MHz  High-Speed Memory Read/Write up to 1MBytes/sec  Seamless integration with the Keil μVision IDE & Debugger  Wide target voltage range: 1.2V - 3.3V, 5V tolerant  Support for 5V only devices using optional 5V Adapter  Optional Isolation Adapter provides electrical isolation from the target system  USB 2.0 High-Speed connection  USB powered (no power supply required)  Target Connectors  10-pin (0.05") - Cortex Debug Connector  20-pin (0.10") - ARM Standard JTAG Connector  20-pin (0.05") - Cortex Debug+ETM Connector The unique streaming trace capabilities of ULINKpro delivers sophisticated analysis features such as:  Complete Code Coverage information about your program's execution ensures thorough application testing and verification  Performance Analysis using the Execution Profiler and Performance Analyzer enable you to identify program bottlenecks, optimize your application, and to isolate problems  Streaming instruction trace requires the target device to have ETM (Embedded Trace Macrocell) www.element14.com www.farnell.com www.newark.com Page <1> V1.0 30/07/13 Raspberry PI Heat Sink Kit The Farnell Raspberry PI heat sink kit will ensure your Raspberry PI remains cool with no need for Fans. They will also help extend the life of your Raspberry PI and thereby reduce hardware failures. The heat sink kit comprises of 3 high quality Pressfin heat sinks which are designed to fit the 3 main heat sources on the Raspberry PI. Included in the kit is a 30mm × 30mm piece of thermal adhesive tape to securely fix the heat sinks in place and to ensure a good thermal transfer bond. Dimensions : Millimetres Important Notice : This data sheet and its contents (the “Information”) belong to the members of the Premier Farnell group of companies (the “Group”) or are licensed to it. No licence is granted for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied. 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Part Number Table Description Part Number Raspberry PI Heat Sink Kit 2319947 Raspberry Pi Power Supply UK version Features: Built specifically for use with Raspberry Pi Class II design 5vdc 1A output via Micro USB Energy efficienct to ErP stage 2 ĞƐĐƌŝƉƟŽŶ͗ This 5vdc 1A UK Micro USB power supply is manufactured specifically for use with the Raspberry Pi device. It offers a highly efficient output ŵĞĞƟŶŐ ůĂƚĞƐƚ ƌW ƐƚĂŐĞ Ϯ ƌĞƋƵŝƌĞŵĞŶƚƐ ĂŶĚ ŝƐ ƐĂĨĞƚLJ ĂƉƉƌŽǀ ĞĚ͘ dŚŝƐ unit has a fixed UK pin and a 1.8 metre output cable and features ƐŚŽƌƚ ĐŝƌĐƵŝƚ ĂŶĚ Žǀ Ğƌ ĐƵƌƌĞŶƚ ƉƌŽƚĞĐƟŽŶ ĂƐ ƐƚĂŶĚĂƌĚ͘ dŚŝƐ ZĂƐƉďĞƌƌLJ Pi power supply has M.T.B.F of 50K hours at 25 degrees C. Part Number PW03060 Output 5vdc 1A maximum Current Min. 0.01A WŽǁ Ğƌ ;ǁ ĂƩ ƐͿ 5W Line Reg +/-5% at rated load dŽƚĂů K ƵƚƉƵƚ ZĞŐƵůĂƟŽŶ +/-5 % at 0—100% load Ripple & Noise (mV p-p) 200mV P-P WƌŽƚĞĐƟŽŶƐ Over Current and Short Circuit Case Size 54 x 50 x 42mm Weight (approx.) 70g DC Cord 1.8 Metres DC Plug Micro USB Rated Input Voltage 100-240Vac Full Input Voltage Range 90-264Vac Rated Frequency 50-60Hz Full Frequency Range 47-63Hz Efficiency 68.17% Leakage Current shall not exceed 0.25mA Input Power 7.72W max Input Current (RMS Max.) 0.18A max Hi-Pot Spec 3000Vac 10mA 1 min. (I.P. to O.P.) E Ž ůŽĂĚ ƉŽǁ Ğƌ ĐŽŶƐƵŵƉƟŽŶ 0.3W max K ƉĞƌĂƟŶŐ dĞŵƉĞƌĂƚƵƌĞ 0 to 40 degrees C Storage Temperature -20 to 80 degrees C K ƉĞƌĂƟŶŐ , ƵŵŝĚŝƚLJ 10% to 90% Safety Approvals BS EN60950-1 / CE marked EMC Standards EN55022:2006+A1:2007 / EN6100-3-2 / EN6100-3-3 Pb-free Yes RoHS Compliant MTBF 50K Hours at 25 degrees C See mechanical drawing and DC cable drawing on page 2. Full spec sheet on this PSU is available on request. Premier Farnell Ltd accepts ŶŽ ƌĞƐƉŽŶƐŝďŝůŝƚLJ ĨŽƌ ƚLJƉŽŐƌĂƉŚŝĐĂů ĞƌƌŽƌƐ ŝŶ ƚŚĞ ƉƌŽĚƵĐƟŽŶ ŽĨ ƚŚŝƐ ůĞĂŇĞƚ͘ WƌŽĚƵĐƚ ƐƉĞĐŝĮ ĐĂƟŽŶƐ ĂƌĞ ƐƵďũĞĐƚ ƚŽ ĐŚĂŶŐĞ ǁ ŝƚŚŽƵƚ ŶŽƟĐĞ Raspberry Pi Power Supply UK version Mechanical drawing: Output connector Keyboard, Mouse and Cable Bundles for the Raspberry Pi Kit Contents: HDMI Bundle DVI Bundle RPI-CABLE+ACC/HDMI RPI-CABLE+ACC/DVI Mini QWERTY Keyboard Optical USB Mouse 3.5mm Stereo Jack Plug Cable – 2m Stereo Phono (RCA) to 3.5mm Stereo Jack Plug Cable – 1.8m Cat5e Patch Cable, RJ45 Plug to RJ45 Plug – 3m High Speed HDMI Cable – 2m HDMI to DVI Cable – 2m LM3S6952 Microcontroller DATA SHEET DS-LM3S6952-1972 Copyright © 2007 Luminary Micro, Inc. PRELIMINARY Legal Disclaimers and Trademark Information INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH LUMINARY MICRO PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN LUMINARY MICRO'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, LUMINARY MICRO ASSUMES NO LIABILITY WHATSOEVER, AND LUMINARY MICRO DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF LUMINARY MICRO'S PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. LUMINARY MICRO'S PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL, LIFE SAVING, OR LIFE-SUSTAINING APPLICATIONS. Luminary Micro may make changes to specifications and product descriptions at any time, without notice. Contact your local Luminary Micro sales office or your distributor to obtain the latest specifications before placing your product order. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Luminary Micro reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. Copyright © 2007 Luminary Micro, Inc. All rights reserved. Stellaris, Luminary Micro, and the Luminary Micro logo are registered trademarks of Luminary Micro, Inc. or its subsidiaries in the United States and other countries. ARM and Thumb are registered trademarks and Cortex is a trademark of ARM Limited. Other names and brands may be claimed as the property of others. Luminary Micro, Inc. 108 Wild Basin, Suite 350 Austin, TX 78746 Main: +1-512-279-8800 Fax: +1-512-279-8879 http://www.luminarymicro.com 2 November 30, 2007 Preliminary Table of Contents About This Document .................................................................................................................... 20 Audience .............................................................................................................................................. 20 About This Manual ................................................................................................................................ 20 Related Documents ............................................................................................................................... 20 Documentation Conventions .................................................................................................................. 20 1 Architectural Overview ...................................................................................................... 22 1.1 Product Features ...................................................................................................................... 22 1.2 Target Applications .................................................................................................................... 28 1.3 High-Level Block Diagram ......................................................................................................... 29 1.4 Functional Overview .................................................................................................................. 29 1.4.1 ARM Cortex™-M3 ..................................................................................................................... 30 1.4.2 Motor Control Peripherals .......................................................................................................... 30 1.4.3 Analog Peripherals .................................................................................................................... 31 1.4.4 Serial Communications Peripherals ............................................................................................ 32 1.4.5 System Peripherals ................................................................................................................... 33 1.4.6 Memory Peripherals .................................................................................................................. 34 1.4.7 Additional Features ................................................................................................................... 35 1.4.8 Hardware Details ...................................................................................................................... 35 2 ARM Cortex-M3 Processor Core ...................................................................................... 37 2.1 Block Diagram .......................................................................................................................... 38 2.2 Functional Description ............................................................................................................... 38 2.2.1 Serial Wire and JTAG Debug ..................................................................................................... 38 2.2.2 Embedded Trace Macrocell (ETM) ............................................................................................. 39 2.2.3 Trace Port Interface Unit (TPIU) ................................................................................................. 39 2.2.4 ROM Table ............................................................................................................................... 39 2.2.5 Memory Protection Unit (MPU) ................................................................................................... 39 2.2.6 Nested Vectored Interrupt Controller (NVIC) ................................................................................ 39 3 Memory Map ....................................................................................................................... 43 4 Interrupts ............................................................................................................................ 45 5 JTAG Interface .................................................................................................................... 48 5.1 Block Diagram .......................................................................................................................... 49 5.2 Functional Description ............................................................................................................... 49 5.2.1 JTAG Interface Pins .................................................................................................................. 50 5.2.2 JTAG TAP Controller ................................................................................................................. 51 5.2.3 Shift Registers .......................................................................................................................... 52 5.2.4 Operational Considerations ........................................................................................................ 52 5.3 Initialization and Configuration ................................................................................................... 55 5.4 Register Descriptions ................................................................................................................ 55 5.4.1 Instruction Register (IR) ............................................................................................................. 55 5.4.2 Data Registers .......................................................................................................................... 57 6 System Control ................................................................................................................... 59 6.1 Functional Description ............................................................................................................... 59 6.1.1 Device Identification .................................................................................................................. 59 6.1.2 Reset Control ............................................................................................................................ 59 November 30, 2007 3 Preliminary LM3S6952 Microcontroller 6.1.3 Power Control ........................................................................................................................... 62 6.1.4 Clock Control ............................................................................................................................ 62 6.1.5 System Control ......................................................................................................................... 64 6.2 Initialization and Configuration ................................................................................................... 65 6.3 Register Map ............................................................................................................................ 65 6.4 Register Descriptions ................................................................................................................ 66 7 Hibernation Module .......................................................................................................... 120 7.1 Block Diagram ........................................................................................................................ 121 7.2 Functional Description ............................................................................................................. 121 7.2.1 Register Access Timing ........................................................................................................... 121 7.2.2 Clock Source .......................................................................................................................... 122 7.2.3 Battery Management ............................................................................................................... 122 7.2.4 Real-Time Clock ...................................................................................................................... 122 7.2.5 Non-Volatile Memory ............................................................................................................... 123 7.2.6 Power Control ......................................................................................................................... 123 7.2.7 Interrupts and Status ............................................................................................................... 123 7.3 Initialization and Configuration ................................................................................................. 124 7.3.1 Initialization ............................................................................................................................. 124 7.3.2 RTC Match Functionality (No Hibernation) ................................................................................ 124 7.3.3 RTC Match/Wake-Up from Hibernation ..................................................................................... 124 7.3.4 External Wake-Up from Hibernation .......................................................................................... 125 7.3.5 RTC/External Wake-Up from Hibernation .................................................................................. 125 7.4 Register Map .......................................................................................................................... 125 7.5 Register Descriptions .............................................................................................................. 126 8 Internal Memory ............................................................................................................... 139 8.1 Block Diagram ........................................................................................................................ 139 8.2 Functional Description ............................................................................................................. 139 8.2.1 SRAM Memory ........................................................................................................................ 139 8.2.2 Flash Memory ......................................................................................................................... 140 8.3 Flash Memory Initialization and Configuration ........................................................................... 141 8.3.1 Flash Programming ................................................................................................................. 141 8.3.2 Nonvolatile Register Programming ........................................................................................... 142 8.4 Register Map .......................................................................................................................... 142 8.5 Flash Register Descriptions (Flash Control Offset) ..................................................................... 143 8.6 Flash Register Descriptions (System Control Offset) .................................................................. 150 9 General-Purpose Input/Outputs (GPIOs) ....................................................................... 163 9.1 Functional Description ............................................................................................................. 163 9.1.1 Data Control ........................................................................................................................... 164 9.1.2 Interrupt Control ...................................................................................................................... 165 9.1.3 Mode Control .......................................................................................................................... 166 9.1.4 Commit Control ....................................................................................................................... 166 9.1.5 Pad Control ............................................................................................................................. 166 9.1.6 Identification ........................................................................................................................... 166 9.2 Initialization and Configuration ................................................................................................. 166 9.3 Register Map .......................................................................................................................... 168 9.4 Register Descriptions .............................................................................................................. 169 4 November 30, 2007 Preliminary Table of Contents 10 General-Purpose Timers ................................................................................................. 204 10.1 Block Diagram ........................................................................................................................ 204 10.2 Functional Description ............................................................................................................. 205 10.2.1 GPTM Reset Conditions .......................................................................................................... 205 10.2.2 32-Bit Timer Operating Modes .................................................................................................. 206 10.2.3 16-Bit Timer Operating Modes .................................................................................................. 207 10.3 Initialization and Configuration ................................................................................................. 211 10.3.1 32-Bit One-Shot/Periodic Timer Mode ....................................................................................... 211 10.3.2 32-Bit Real-Time Clock (RTC) Mode ......................................................................................... 212 10.3.3 16-Bit One-Shot/Periodic Timer Mode ....................................................................................... 212 10.3.4 16-Bit Input Edge Count Mode ................................................................................................. 213 10.3.5 16-Bit Input Edge Timing Mode ................................................................................................ 213 10.3.6 16-Bit PWM Mode ................................................................................................................... 214 10.4 Register Map .......................................................................................................................... 214 10.5 Register Descriptions .............................................................................................................. 215 11 Watchdog Timer ............................................................................................................... 240 11.1 Block Diagram ........................................................................................................................ 240 11.2 Functional Description ............................................................................................................. 240 11.3 Initialization and Configuration ................................................................................................. 241 11.4 Register Map .......................................................................................................................... 241 11.5 Register Descriptions .............................................................................................................. 242 12 Analog-to-Digital Converter (ADC) ................................................................................. 263 12.1 Block Diagram ........................................................................................................................ 264 12.2 Functional Description ............................................................................................................. 264 12.2.1 Sample Sequencers ................................................................................................................ 264 12.2.2 Module Control ........................................................................................................................ 265 12.2.3 Hardware Sample Averaging Circuit ......................................................................................... 266 12.2.4 Analog-to-Digital Converter ...................................................................................................... 266 12.2.5 Test Modes ............................................................................................................................. 266 12.2.6 Internal Temperature Sensor .................................................................................................... 266 12.3 Initialization and Configuration ................................................................................................. 267 12.3.1 Module Initialization ................................................................................................................. 267 12.3.2 Sample Sequencer Configuration ............................................................................................. 267 12.4 Register Map .......................................................................................................................... 268 12.5 Register Descriptions .............................................................................................................. 269 13 Universal Asynchronous Receivers/Transmitters (UARTs) ......................................... 296 13.1 Block Diagram ........................................................................................................................ 297 13.2 Functional Description ............................................................................................................. 297 13.2.1 Transmit/Receive Logic ........................................................................................................... 297 13.2.2 Baud-Rate Generation ............................................................................................................. 298 13.2.3 Data Transmission .................................................................................................................. 299 13.2.4 Serial IR (SIR) ......................................................................................................................... 299 13.2.5 FIFO Operation ....................................................................................................................... 300 13.2.6 Interrupts ................................................................................................................................ 300 13.2.7 Loopback Operation ................................................................................................................ 301 13.2.8 IrDA SIR block ........................................................................................................................ 301 13.3 Initialization and Configuration ................................................................................................. 301 13.4 Register Map .......................................................................................................................... 302 November 30, 2007 5 Preliminary LM3S6952 Microcontroller 13.5 Register Descriptions .............................................................................................................. 303 14 Synchronous Serial Interface (SSI) ................................................................................ 337 14.1 Block Diagram ........................................................................................................................ 337 14.2 Functional Description ............................................................................................................. 337 14.2.1 Bit Rate Generation ................................................................................................................. 338 14.2.2 FIFO Operation ....................................................................................................................... 338 14.2.3 Interrupts ................................................................................................................................ 338 14.2.4 Frame Formats ....................................................................................................................... 339 14.3 Initialization and Configuration ................................................................................................. 346 14.4 Register Map .......................................................................................................................... 347 14.5 Register Descriptions .............................................................................................................. 348 15 Inter-Integrated Circuit (I2C) Interface ............................................................................ 374 15.1 Block Diagram ........................................................................................................................ 374 15.2 Functional Description ............................................................................................................. 374 15.2.1 I2C Bus Functional Overview .................................................................................................... 375 15.2.2 Available Speed Modes ........................................................................................................... 377 15.2.3 Interrupts ................................................................................................................................ 378 15.2.4 Loopback Operation ................................................................................................................ 378 15.2.5 Command Sequence Flow Charts ............................................................................................ 379 15.3 Initialization and Configuration ................................................................................................. 385 15.4 I2C Register Map ..................................................................................................................... 386 15.5 Register Descriptions (I2C Master) ........................................................................................... 387 15.6 Register Descriptions (I2C Slave) ............................................................................................. 400 16 Ethernet Controller .......................................................................................................... 409 16.1 Block Diagram ........................................................................................................................ 410 16.2 Functional Description ............................................................................................................. 410 16.2.1 Internal MII Operation .............................................................................................................. 410 16.2.2 PHY Configuration/Operation ................................................................................................... 411 16.2.3 MAC Configuration/Operation .................................................................................................. 412 16.2.4 Interrupts ................................................................................................................................ 414 16.3 Initialization and Configuration ................................................................................................. 415 16.4 Ethernet Register Map ............................................................................................................. 415 16.5 Ethernet MAC Register Descriptions ......................................................................................... 417 16.6 MII Management Register Descriptions ..................................................................................... 434 17 Analog Comparators ....................................................................................................... 453 17.1 Block Diagram ........................................................................................................................ 454 17.2 Functional Description ............................................................................................................. 454 17.2.1 Internal Reference Programming .............................................................................................. 456 17.3 Initialization and Configuration ................................................................................................. 457 17.4 Register Map .......................................................................................................................... 457 17.5 Register Descriptions .............................................................................................................. 458 18 Pulse Width Modulator (PWM) ........................................................................................ 466 18.1 Block Diagram ........................................................................................................................ 466 18.2 Functional Description ............................................................................................................. 466 18.2.1 PWM Timer ............................................................................................................................. 466 18.2.2 PWM Comparators .................................................................................................................. 467 18.2.3 PWM Signal Generator ............................................................................................................ 468 6 November 30, 2007 Preliminary Table of Contents 18.2.4 Dead-Band Generator ............................................................................................................. 469 18.2.5 Interrupt/ADC-Trigger Selector ................................................................................................. 469 18.2.6 Synchronization Methods ......................................................................................................... 469 18.2.7 Fault Conditions ...................................................................................................................... 470 18.2.8 Output Control Block ............................................................................................................... 470 18.3 Initialization and Configuration ................................................................................................. 470 18.4 Register Map .......................................................................................................................... 471 18.5 Register Descriptions .............................................................................................................. 472 19 Quadrature Encoder Interface (QEI) ............................................................................... 501 19.1 Block Diagram ........................................................................................................................ 501 19.2 Functional Description ............................................................................................................. 502 19.3 Initialization and Configuration ................................................................................................. 504 19.4 Register Map .......................................................................................................................... 504 19.5 Register Descriptions .............................................................................................................. 505 20 Pin Diagram ...................................................................................................................... 518 21 Signal Tables .................................................................................................................... 519 22 Operating Characteristics ............................................................................................... 533 23 Electrical Characteristics ................................................................................................ 534 23.1 DC Characteristics .................................................................................................................. 534 23.1.1 Maximum Ratings ................................................................................................................... 534 23.1.2 Recommended DC Operating Conditions .................................................................................. 534 23.1.3 On-Chip Low Drop-Out (LDO) Regulator Characteristics ............................................................ 535 23.1.4 Power Specifications ............................................................................................................... 535 23.1.5 Flash Memory Characteristics .................................................................................................. 537 23.2 AC Characteristics ................................................................................................................... 537 23.2.1 Load Conditions ...................................................................................................................... 537 23.2.2 Clocks .................................................................................................................................... 537 23.2.3 Analog-to-Digital Converter ...................................................................................................... 538 23.2.4 Analog Comparator ................................................................................................................. 539 23.2.5 I2C ......................................................................................................................................... 539 23.2.6 Ethernet Controller .................................................................................................................. 540 23.2.7 Hibernation Module ................................................................................................................. 543 23.2.8 Synchronous Serial Interface (SSI) ........................................................................................... 543 23.2.9 JTAG and Boundary Scan ........................................................................................................ 545 23.2.10 General-Purpose I/O ............................................................................................................... 546 23.2.11 Reset ..................................................................................................................................... 547 24 Package Information ........................................................................................................ 549 A Serial Flash Loader .......................................................................................................... 551 A.1 Serial Flash Loader ................................................................................................................. 551 A.2 Interfaces ............................................................................................................................... 551 A.2.1 UART ..................................................................................................................................... 551 A.2.2 SSI ......................................................................................................................................... 551 A.3 Packet Handling ...................................................................................................................... 552 A.3.1 Packet Format ........................................................................................................................ 552 A.3.2 Sending Packets ..................................................................................................................... 552 A.3.3 Receiving Packets ................................................................................................................... 552 November 30, 2007 7 Preliminary LM3S6952 Microcontroller A.4 Commands ............................................................................................................................. 553 A.4.1 COMMAND_PING (0X20) ........................................................................................................ 553 A.4.2 COMMAND_GET_STATUS (0x23) ........................................................................................... 553 A.4.3 COMMAND_DOWNLOAD (0x21) ............................................................................................. 553 A.4.4 COMMAND_SEND_DATA (0x24) ............................................................................................. 554 A.4.5 COMMAND_RUN (0x22) ......................................................................................................... 554 A.4.6 COMMAND_RESET (0x25) ..................................................................................................... 554 B Register Quick Reference ............................................................................................... 556 C Ordering and Contact Information ................................................................................. 575 C.1 Ordering Information ................................................................................................................ 575 C.2 Kits ......................................................................................................................................... 575 C.3 Company Information .............................................................................................................. 575 C.4 Support Information ................................................................................................................. 576 8 November 30, 2007 Preliminary Table of Contents List of Figures Figure 1-1. Stellaris® 6000 Series High-Level Block Diagram ............................................................... 29 Figure 2-1. CPU Block Diagram ......................................................................................................... 38 Figure 2-2. TPIU Block Diagram ........................................................................................................ 39 Figure 5-1. JTAG Module Block Diagram ............................................................................................ 49 Figure 5-2. Test Access Port State Machine ....................................................................................... 52 Figure 5-3. IDCODE Register Format ................................................................................................. 57 Figure 5-4. BYPASS Register Format ................................................................................................ 58 Figure 5-5. Boundary Scan Register Format ....................................................................................... 58 Figure 6-1. External Circuitry to Extend Reset .................................................................................... 60 Figure 7-1. Hibernation Module Block Diagram ................................................................................. 121 Figure 8-1. Flash Block Diagram ...................................................................................................... 139 Figure 9-1. GPIO Port Block Diagram ............................................................................................... 164 Figure 9-2. GPIODATA Write Example ............................................................................................. 165 Figure 9-3. GPIODATA Read Example ............................................................................................. 165 Figure 10-1. GPTM Module Block Diagram ........................................................................................ 205 Figure 10-2. 16-Bit Input Edge Count Mode Example .......................................................................... 209 Figure 10-3. 16-Bit Input Edge Time Mode Example ........................................................................... 210 Figure 10-4. 16-Bit PWM Mode Example ............................................................................................ 211 Figure 11-1. WDT Module Block Diagram .......................................................................................... 240 Figure 12-1. ADC Module Block Diagram ........................................................................................... 264 Figure 12-2. Internal Temperature Sensor Characteristic ..................................................................... 267 Figure 13-1. UART Module Block Diagram ......................................................................................... 297 Figure 13-2. UART Character Frame ................................................................................................. 298 Figure 13-3. IrDA Data Modulation ..................................................................................................... 300 Figure 14-1. SSI Module Block Diagram ............................................................................................. 337 Figure 14-2. TI Synchronous Serial Frame Format (Single Transfer) .................................................... 339 Figure 14-3. TI Synchronous Serial Frame Format (Continuous Transfer) ............................................ 340 Figure 14-4. Freescale SPI Format (Single Transfer) with SPO=0 and SPH=0 ...................................... 341 Figure 14-5. Freescale SPI Format (Continuous Transfer) with SPO=0 and SPH=0 .............................. 341 Figure 14-6. Freescale SPI Frame Format with SPO=0 and SPH=1 ..................................................... 342 Figure 14-7. Freescale SPI Frame Format (Single Transfer) with SPO=1 and SPH=0 ........................... 343 Figure 14-8. Freescale SPI Frame Format (Continuous Transfer) with SPO=1 and SPH=0 .................... 343 Figure 14-9. Freescale SPI Frame Format with SPO=1 and SPH=1 ..................................................... 344 Figure 14-10. MICROWIRE Frame Format (Single Frame) .................................................................... 345 Figure 14-11. MICROWIRE Frame Format (Continuous Transfer) ......................................................... 346 Figure 14-12. MICROWIRE Frame Format, SSIFss Input Setup and Hold Requirements ........................ 346 Figure 15-1. I2C Block Diagram ......................................................................................................... 374 Figure 15-2. I2C Bus Configuration .................................................................................................... 375 Figure 15-3. START and STOP Conditions ......................................................................................... 375 Figure 15-4. Complete Data Transfer with a 7-Bit Address ................................................................... 376 Figure 15-5. R/S Bit in First Byte ........................................................................................................ 376 Figure 15-6. Data Validity During Bit Transfer on the I2C Bus ............................................................... 376 Figure 15-7. Master Single SEND ...................................................................................................... 379 Figure 15-8. Master Single RECEIVE ................................................................................................. 380 Figure 15-9. Master Burst SEND ....................................................................................................... 381 November 30, 2007 9 Preliminary LM3S6952 Microcontroller Figure 15-10. Master Burst RECEIVE .................................................................................................. 382 Figure 15-11. Master Burst RECEIVE after Burst SEND ........................................................................ 383 Figure 15-12. Master Burst SEND after Burst RECEIVE ........................................................................ 384 Figure 15-13. Slave Command Sequence ............................................................................................ 385 Figure 16-1. Ethernet Controller Block Diagram .................................................................................. 410 Figure 16-2. Ethernet Controller ......................................................................................................... 410 Figure 16-3. Ethernet Frame ............................................................................................................. 412 Figure 17-1. Analog Comparator Module Block Diagram ..................................................................... 454 Figure 17-2. Structure of Comparator Unit .......................................................................................... 455 Figure 17-3. Comparator Internal Reference Structure ........................................................................ 456 Figure 18-1. PWM Module Block Diagram .......................................................................................... 466 Figure 18-2. PWM Count-Down Mode ................................................................................................ 467 Figure 18-3. PWM Count-Up/Down Mode .......................................................................................... 468 Figure 18-4. PWM Generation Example In Count-Up/Down Mode ....................................................... 468 Figure 18-5. PWM Dead-Band Generator ........................................................................................... 469 Figure 19-1. QEI Block Diagram ........................................................................................................ 501 Figure 19-2. Quadrature Encoder and Velocity Predivider Operation .................................................... 503 Figure 20-1. Pin Connection Diagram ................................................................................................ 518 Figure 23-1. Load Conditions ............................................................................................................ 537 Figure 23-2. I2C Timing ..................................................................................................................... 540 Figure 23-3. External XTLP Oscillator Characteristics ......................................................................... 542 Figure 23-4. Hibernation Module Timing ............................................................................................. 543 Figure 23-5. SSI Timing for TI Frame Format (FRF=01), Single Transfer Timing Measurement .............. 544 Figure 23-6. SSI Timing for MICROWIRE Frame Format (FRF=10), Single Transfer ............................. 544 Figure 23-7. SSI Timing for SPI Frame Format (FRF=00), with SPH=1 ................................................. 545 Figure 23-8. JTAG Test Clock Input Timing ......................................................................................... 546 Figure 23-9. JTAG Test Access Port (TAP) Timing .............................................................................. 546 Figure 23-10. JTAG TRST Timing ........................................................................................................ 546 Figure 23-11. External Reset Timing (RST) .......................................................................................... 547 Figure 23-12. Power-On Reset Timing ................................................................................................. 548 Figure 23-13. Brown-Out Reset Timing ................................................................................................ 548 Figure 23-14. Software Reset Timing ................................................................................................... 548 Figure 23-15. Watchdog Reset Timing ................................................................................................. 548 Figure 24-1. 100-Pin LQFP Package .................................................................................................. 549 10 November 30, 2007 Preliminary Table of Contents List of Tables Table 1. Documentation Conventions ............................................................................................ 20 Table 3-1. Memory Map ................................................................................................................... 43 Table 4-1. Exception Types .............................................................................................................. 45 Table 4-2. Interrupts ........................................................................................................................ 46 Table 5-1. JTAG Port Pins Reset State ............................................................................................. 50 Table 5-2. JTAG Instruction Register Commands ............................................................................... 55 Table 6-1. System Control Register Map ........................................................................................... 65 Table 7-1. Hibernation Module Register Map ................................................................................... 125 Table 8-1. Flash Protection Policy Combinations ............................................................................. 141 Table 8-2. Flash Resident Registers ............................................................................................... 142 Table 8-3. Flash Register Map ........................................................................................................ 142 Table 9-1. GPIO Pad Configuration Examples ................................................................................. 167 Table 9-2. GPIO Interrupt Configuration Example ............................................................................ 167 Table 9-3. GPIO Register Map ....................................................................................................... 168 Table 10-1. Available CCP Pins ........................................................................................................ 205 Table 10-2. 16-Bit Timer With Prescaler Configurations ..................................................................... 208 Table 10-3. Timers Register Map ...................................................................................................... 214 Table 11-1. Watchdog Timer Register Map ........................................................................................ 241 Table 12-1. Samples and FIFO Depth of Sequencers ........................................................................ 264 Table 12-2. ADC Register Map ......................................................................................................... 268 Table 13-1. UART Register Map ....................................................................................................... 302 Table 14-1. SSI Register Map .......................................................................................................... 347 Table 15-1. Examples of I2C Master Timer Period versus Speed Mode ............................................... 377 Table 15-2. Inter-Integrated Circuit (I2C) Interface Register Map ......................................................... 386 Table 15-3. Write Field Decoding for I2CMCS[3:0] Field (Sheet 1 of 3) ................................................ 391 Table 16-1. TX & RX FIFO Organization ........................................................................................... 413 Table 16-2. Ethernet Register Map ................................................................................................... 416 Table 17-1. Comparator 0 Operating Modes ..................................................................................... 455 Table 17-2. Comparator 1 Operating Modes ..................................................................................... 455 Table 17-3. Comparator 2 Operating Modes ...................................................................................... 456 Table 17-4. Internal Reference Voltage and ACREFCTL Field Values ................................................. 456 Table 17-5. Analog Comparators Register Map ................................................................................. 458 Table 18-1. PWM Register Map ........................................................................................................ 471 Table 19-1. QEI Register Map .......................................................................................................... 504 Table 21-1. Signals by Pin Number ................................................................................................... 519 Table 21-2. Signals by Signal Name ................................................................................................. 523 Table 21-3. Signals by Function, Except for GPIO ............................................................................. 527 Table 21-4. GPIO Pins and Alternate Functions ................................................................................. 531 Table 22-1. Temperature Characteristics ........................................................................................... 533 Table 22-2. Thermal Characteristics ................................................................................................. 533 Table 23-1. Maximum Ratings .......................................................................................................... 534 Table 23-2. Recommended DC Operating Conditions ........................................................................ 534 Table 23-3. LDO Regulator Characteristics ....................................................................................... 535 Table 23-4. Detailed Power Specifications ........................................................................................ 536 Table 23-5. Flash Memory Characteristics ........................................................................................ 537 Table 23-6. Phase Locked Loop (PLL) Characteristics ....................................................................... 537 November 30, 2007 11 Preliminary LM3S6952 Microcontroller Table 23-7. Clock Characteristics ..................................................................................................... 537 Table 23-8. Crystal Characteristics ................................................................................................... 538 Table 23-9. ADC Characteristics ....................................................................................................... 538 Table 23-10. Analog Comparator Characteristics ................................................................................. 539 Table 23-11. Analog Comparator Voltage Reference Characteristics .................................................... 539 Table 23-12. I2C Characteristics ......................................................................................................... 539 Table 23-13. 100BASE-TX Transmitter Characteristics ........................................................................ 540 Table 23-14. 100BASE-TX Transmitter Characteristics (informative) ..................................................... 540 Table 23-15. 100BASE-TX Receiver Characteristics ............................................................................ 540 Table 23-16. 10BASE-T Transmitter Characteristics ............................................................................ 540 Table 23-17. 10BASE-T Transmitter Characteristics (informative) ......................................................... 541 Table 23-18. 10BASE-T Receiver Characteristics ................................................................................ 541 Table 23-19. Isolation Transformers ................................................................................................... 541 Table 23-20. Ethernet Reference Crystal ............................................................................................ 542 Table 23-21. External XTLP Oscillator Characteristics ......................................................................... 542 Table 23-22. Hibernation Module Characteristics ................................................................................. 543 Table 23-23. SSI Characteristics ........................................................................................................ 543 Table 23-24. JTAG Characteristics ..................................................................................................... 545 Table 23-25. GPIO Characteristics ..................................................................................................... 547 Table 23-26. Reset Characteristics ..................................................................................................... 547 Table C-1. Part Ordering Information ............................................................................................... 575 12 November 30, 2007 Preliminary Table of Contents List of Registers System Control .............................................................................................................................. 59 Register 1: Device Identification 0 (DID0), offset 0x000 ....................................................................... 67 Register 2: Brown-Out Reset Control (PBORCTL), offset 0x030 .......................................................... 69 Register 3: LDO Power Control (LDOPCTL), offset 0x034 ................................................................... 70 Register 4: Raw Interrupt Status (RIS), offset 0x050 ........................................................................... 71 Register 5: Interrupt Mask Control (IMC), offset 0x054 ........................................................................ 72 Register 6: Masked Interrupt Status and Clear (MISC), offset 0x058 .................................................... 73 Register 7: Reset Cause (RESC), offset 0x05C .................................................................................. 74 Register 8: Run-Mode Clock Configuration (RCC), offset 0x060 .......................................................... 75 Register 9: XTAL to PLL Translation (PLLCFG), offset 0x064 .............................................................. 79 Register 10: Run-Mode Clock Configuration 2 (RCC2), offset 0x070 ...................................................... 80 Register 11: Deep Sleep Clock Configuration (DSLPCLKCFG), offset 0x144 .......................................... 82 Register 12: Device Identification 1 (DID1), offset 0x004 ....................................................................... 83 Register 13: Device Capabilities 0 (DC0), offset 0x008 ......................................................................... 85 Register 14: Device Capabilities 1 (DC1), offset 0x010 ......................................................................... 86 Register 15: Device Capabilities 2 (DC2), offset 0x014 ......................................................................... 88 Register 16: Device Capabilities 3 (DC3), offset 0x018 ......................................................................... 90 Register 17: Device Capabilities 4 (DC4), offset 0x01C ......................................................................... 92 Register 18: Run Mode Clock Gating Control Register 0 (RCGC0), offset 0x100 .................................... 94 Register 19: Sleep Mode Clock Gating Control Register 0 (SCGC0), offset 0x110 .................................. 96 Register 20: Deep Sleep Mode Clock Gating Control Register 0 (DCGC0), offset 0x120 ......................... 98 Register 21: Run Mode Clock Gating Control Register 1 (RCGC1), offset 0x104 ................................... 100 Register 22: Sleep Mode Clock Gating Control Register 1 (SCGC1), offset 0x114 ................................. 103 Register 23: Deep Sleep Mode Clock Gating Control Register 1 (DCGC1), offset 0x124 ....................... 106 Register 24: Run Mode Clock Gating Control Register 2 (RCGC2), offset 0x108 ................................... 109 Register 25: Sleep Mode Clock Gating Control Register 2 (SCGC2), offset 0x118 ................................. 111 Register 26: Deep Sleep Mode Clock Gating Control Register 2 (DCGC2), offset 0x128 ....................... 113 Register 27: Software Reset Control 0 (SRCR0), offset 0x040 ............................................................. 115 Register 28: Software Reset Control 1 (SRCR1), offset 0x044 ............................................................. 116 Register 29: Software Reset Control 2 (SRCR2), offset 0x048 ............................................................. 118 Hibernation Module ..................................................................................................................... 120 Register 1: Hibernation RTC Counter (HIBRTCC), offset 0x000 ......................................................... 127 Register 2: Hibernation RTC Match 0 (HIBRTCM0), offset 0x004 ....................................................... 128 Register 3: Hibernation RTC Match 1 (HIBRTCM1), offset 0x008 ....................................................... 129 Register 4: Hibernation RTC Load (HIBRTCLD), offset 0x00C ........................................................... 130 Register 5: Hibernation Control (HIBCTL), offset 0x010 ..................................................................... 131 Register 6: Hibernation Interrupt Mask (HIBIM), offset 0x014 ............................................................. 133 Register 7: Hibernation Raw Interrupt Status (HIBRIS), offset 0x018 .................................................. 134 Register 8: Hibernation Masked Interrupt Status (HIBMIS), offset 0x01C ............................................ 135 Register 9: Hibernation Interrupt Clear (HIBIC), offset 0x020 ............................................................. 136 Register 10: Hibernation RTC Trim (HIBRTCT), offset 0x024 ............................................................... 137 Register 11: Hibernation Data (HIBDATA), offset 0x030-0x12C ............................................................ 138 Internal Memory ........................................................................................................................... 139 Register 1: Flash Memory Address (FMA), offset 0x000 .................................................................... 144 Register 2: Flash Memory Data (FMD), offset 0x004 ......................................................................... 145 November 30, 2007 13 Preliminary LM3S6952 Microcontroller Register 3: Flash Memory Control (FMC), offset 0x008 ..................................................................... 146 Register 4: Flash Controller Raw Interrupt Status (FCRIS), offset 0x00C ............................................ 148 Register 5: Flash Controller Interrupt Mask (FCIM), offset 0x010 ........................................................ 149 Register 6: Flash Controller Masked Interrupt Status and Clear (FCMISC), offset 0x014 ..................... 150 Register 7: USec Reload (USECRL), offset 0x140 ............................................................................ 151 Register 8: Flash Memory Protection Read Enable 0 (FMPRE0), offset 0x130 and 0x200 ................... 152 Register 9: Flash Memory Protection Program Enable 0 (FMPPE0), offset 0x134 and 0x400 ............... 153 Register 10: User Debug (USER_DBG), offset 0x1D0 ......................................................................... 154 Register 11: User Register 0 (USER_REG0), offset 0x1E0 .................................................................. 155 Register 12: User Register 1 (USER_REG1), offset 0x1E4 .................................................................. 156 Register 13: Flash Memory Protection Read Enable 1 (FMPRE1), offset 0x204 .................................... 157 Register 14: Flash Memory Protection Read Enable 2 (FMPRE2), offset 0x208 .................................... 158 Register 15: Flash Memory Protection Read Enable 3 (FMPRE3), offset 0x20C ................................... 159 Register 16: Flash Memory Protection Program Enable 1 (FMPPE1), offset 0x404 ............................... 160 Register 17: Flash Memory Protection Program Enable 2 (FMPPE2), offset 0x408 ............................... 161 Register 18: Flash Memory Protection Program Enable 3 (FMPPE3), offset 0x40C ............................... 162 General-Purpose Input/Outputs (GPIOs) ................................................................................... 163 Register 1: GPIO Data (GPIODATA), offset 0x000 ............................................................................ 170 Register 2: GPIO Direction (GPIODIR), offset 0x400 ......................................................................... 171 Register 3: GPIO Interrupt Sense (GPIOIS), offset 0x404 .................................................................. 172 Register 4: GPIO Interrupt Both Edges (GPIOIBE), offset 0x408 ........................................................ 173 Register 5: GPIO Interrupt Event (GPIOIEV), offset 0x40C ................................................................ 174 Register 6: GPIO Interrupt Mask (GPIOIM), offset 0x410 ................................................................... 175 Register 7: GPIO Raw Interrupt Status (GPIORIS), offset 0x414 ........................................................ 176 Register 8: GPIO Masked Interrupt Status (GPIOMIS), offset 0x418 ................................................... 177 Register 9: GPIO Interrupt Clear (GPIOICR), offset 0x41C ................................................................ 178 Register 10: GPIO Alternate Function Select (GPIOAFSEL), offset 0x420 ............................................ 179 Register 11: GPIO 2-mA Drive Select (GPIODR2R), offset 0x500 ........................................................ 181 Register 12: GPIO 4-mA Drive Select (GPIODR4R), offset 0x504 ........................................................ 182 Register 13: GPIO 8-mA Drive Select (GPIODR8R), offset 0x508 ........................................................ 183 Register 14: GPIO Open Drain Select (GPIOODR), offset 0x50C ......................................................... 184 Register 15: GPIO Pull-Up Select (GPIOPUR), offset 0x510 ................................................................ 185 Register 16: GPIO Pull-Down Select (GPIOPDR), offset 0x514 ........................................................... 186 Register 17: GPIO Slew Rate Control Select (GPIOSLR), offset 0x518 ................................................ 187 Register 18: GPIO Digital Enable (GPIODEN), offset 0x51C ................................................................ 188 Register 19: GPIO Lock (GPIOLOCK), offset 0x520 ............................................................................ 189 Register 20: GPIO Commit (GPIOCR), offset 0x524 ............................................................................ 190 Register 21: GPIO Peripheral Identification 4 (GPIOPeriphID4), offset 0xFD0 ....................................... 192 Register 22: GPIO Peripheral Identification 5 (GPIOPeriphID5), offset 0xFD4 ....................................... 193 Register 23: GPIO Peripheral Identification 6 (GPIOPeriphID6), offset 0xFD8 ....................................... 194 Register 24: GPIO Peripheral Identification 7 (GPIOPeriphID7), offset 0xFDC ...................................... 195 Register 25: GPIO Peripheral Identification 0 (GPIOPeriphID0), offset 0xFE0 ....................................... 196 Register 26: GPIO Peripheral Identification 1 (GPIOPeriphID1), offset 0xFE4 ....................................... 197 Register 27: GPIO Peripheral Identification 2 (GPIOPeriphID2), offset 0xFE8 ....................................... 198 Register 28: GPIO Peripheral Identification 3 (GPIOPeriphID3), offset 0xFEC ...................................... 199 Register 29: GPIO PrimeCell Identification 0 (GPIOPCellID0), offset 0xFF0 .......................................... 200 Register 30: GPIO PrimeCell Identification 1 (GPIOPCellID1), offset 0xFF4 .......................................... 201 Register 31: GPIO PrimeCell Identification 2 (GPIOPCellID2), offset 0xFF8 .......................................... 202 14 November 30, 2007 Preliminary Table of Contents Register 32: GPIO PrimeCell Identification 3 (GPIOPCellID3), offset 0xFFC ......................................... 203 General-Purpose Timers ............................................................................................................. 204 Register 1: GPTM Configuration (GPTMCFG), offset 0x000 .............................................................. 216 Register 2: GPTM TimerA Mode (GPTMTAMR), offset 0x004 ............................................................ 217 Register 3: GPTM TimerB Mode (GPTMTBMR), offset 0x008 ............................................................ 219 Register 4: GPTM Control (GPTMCTL), offset 0x00C ........................................................................ 221 Register 5: GPTM Interrupt Mask (GPTMIMR), offset 0x018 .............................................................. 224 Register 6: GPTM Raw Interrupt Status (GPTMRIS), offset 0x01C ..................................................... 226 Register 7: GPTM Masked Interrupt Status (GPTMMIS), offset 0x020 ................................................ 227 Register 8: GPTM Interrupt Clear (GPTMICR), offset 0x024 .............................................................. 228 Register 9: GPTM TimerA Interval Load (GPTMTAILR), offset 0x028 ................................................. 230 Register 10: GPTM TimerB Interval Load (GPTMTBILR), offset 0x02C ................................................ 231 Register 11: GPTM TimerA Match (GPTMTAMATCHR), offset 0x030 ................................................... 232 Register 12: GPTM TimerB Match (GPTMTBMATCHR), offset 0x034 .................................................. 233 Register 13: GPTM TimerA Prescale (GPTMTAPR), offset 0x038 ........................................................ 234 Register 14: GPTM TimerB Prescale (GPTMTBPR), offset 0x03C ....................................................... 235 Register 15: GPTM TimerA Prescale Match (GPTMTAPMR), offset 0x040 ........................................... 236 Register 16: GPTM TimerB Prescale Match (GPTMTBPMR), offset 0x044 ........................................... 237 Register 17: GPTM TimerA (GPTMTAR), offset 0x048 ........................................................................ 238 Register 18: GPTM TimerB (GPTMTBR), offset 0x04C ....................................................................... 239 Watchdog Timer ........................................................................................................................... 240 Register 1: Watchdog Load (WDTLOAD), offset 0x000 ...................................................................... 243 Register 2: Watchdog Value (WDTVALUE), offset 0x004 ................................................................... 244 Register 3: Watchdog Control (WDTCTL), offset 0x008 ..................................................................... 245 Register 4: Watchdog Interrupt Clear (WDTICR), offset 0x00C .......................................................... 246 Register 5: Watchdog Raw Interrupt Status (WDTRIS), offset 0x010 .................................................. 247 Register 6: Watchdog Masked Interrupt Status (WDTMIS), offset 0x014 ............................................. 248 Register 7: Watchdog Test (WDTTEST), offset 0x418 ....................................................................... 249 Register 8: Watchdog Lock (WDTLOCK), offset 0xC00 ..................................................................... 250 Register 9: Watchdog Peripheral Identification 4 (WDTPeriphID4), offset 0xFD0 ................................. 251 Register 10: Watchdog Peripheral Identification 5 (WDTPeriphID5), offset 0xFD4 ................................. 252 Register 11: Watchdog Peripheral Identification 6 (WDTPeriphID6), offset 0xFD8 ................................. 253 Register 12: Watchdog Peripheral Identification 7 (WDTPeriphID7), offset 0xFDC ................................ 254 Register 13: Watchdog Peripheral Identification 0 (WDTPeriphID0), offset 0xFE0 ................................. 255 Register 14: Watchdog Peripheral Identification 1 (WDTPeriphID1), offset 0xFE4 ................................. 256 Register 15: Watchdog Peripheral Identification 2 (WDTPeriphID2), offset 0xFE8 ................................. 257 Register 16: Watchdog Peripheral Identification 3 (WDTPeriphID3), offset 0xFEC ................................. 258 Register 17: Watchdog PrimeCell Identification 0 (WDTPCellID0), offset 0xFF0 .................................... 259 Register 18: Watchdog PrimeCell Identification 1 (WDTPCellID1), offset 0xFF4 .................................... 260 Register 19: Watchdog PrimeCell Identification 2 (WDTPCellID2), offset 0xFF8 .................................... 261 Register 20: Watchdog PrimeCell Identification 3 (WDTPCellID3 ), offset 0xFFC .................................. 262 Analog-to-Digital Converter (ADC) ............................................................................................. 263 Register 1: ADC Active Sample Sequencer (ADCACTSS), offset 0x000 ............................................. 270 Register 2: ADC Raw Interrupt Status (ADCRIS), offset 0x004 ........................................................... 271 Register 3: ADC Interrupt Mask (ADCIM), offset 0x008 ..................................................................... 272 Register 4: ADC Interrupt Status and Clear (ADCISC), offset 0x00C .................................................. 273 Register 5: ADC Overflow Status (ADCOSTAT), offset 0x010 ............................................................ 274 Register 6: ADC Event Multiplexer Select (ADCEMUX), offset 0x014 ................................................. 275 November 30, 2007 15 Preliminary LM3S6952 Microcontroller Register 7: ADC Underflow Status (ADCUSTAT), offset 0x018 ........................................................... 278 Register 8: ADC Sample Sequencer Priority (ADCSSPRI), offset 0x020 ............................................. 279 Register 9: ADC Processor Sample Sequence Initiate (ADCPSSI), offset 0x028 ................................. 280 Register 10: ADC Sample Averaging Control (ADCSAC), offset 0x030 ................................................. 281 Register 11: ADC Sample Sequence Input Multiplexer Select 0 (ADCSSMUX0), offset 0x040 ............... 282 Register 12: ADC Sample Sequence Control 0 (ADCSSCTL0), offset 0x044 ........................................ 284 Register 13: ADC Sample Sequence Result FIFO 0 (ADCSSFIFO0), offset 0x048 ................................ 287 Register 14: ADC Sample Sequence Result FIFO 1 (ADCSSFIFO1), offset 0x068 ................................ 287 Register 15: ADC Sample Sequence Result FIFO 2 (ADCSSFIFO2), offset 0x088 ................................ 287 Register 16: ADC Sample Sequence Result FIFO 3 (ADCSSFIFO3), offset 0x0A8 ............................... 287 Register 17: ADC Sample Sequence FIFO 0 Status (ADCSSFSTAT0), offset 0x04C ............................. 288 Register 18: ADC Sample Sequence FIFO 1 Status (ADCSSFSTAT1), offset 0x06C ............................. 288 Register 19: ADC Sample Sequence FIFO 2 Status (ADCSSFSTAT2), offset 0x08C ............................ 288 Register 20: ADC Sample Sequence FIFO 3 Status (ADCSSFSTAT3), offset 0x0AC ............................ 288 Register 21: ADC Sample Sequence Input Multiplexer Select 1 (ADCSSMUX1), offset 0x060 ............... 289 Register 22: ADC Sample Sequence Input Multiplexer Select 2 (ADCSSMUX2), offset 0x080 ............... 289 Register 23: ADC Sample Sequence Control 1 (ADCSSCTL1), offset 0x064 ........................................ 290 Register 24: ADC Sample Sequence Control 2 (ADCSSCTL2), offset 0x084 ........................................ 290 Register 25: ADC Sample Sequence Input Multiplexer Select 3 (ADCSSMUX3), offset 0x0A0 ............... 292 Register 26: ADC Sample Sequence Control 3 (ADCSSCTL3), offset 0x0A4 ........................................ 293 Register 27: ADC Test Mode Loopback (ADCTMLB), offset 0x100 ....................................................... 294 Universal Asynchronous Receivers/Transmitters (UARTs) ..................................................... 296 Register 1: UART Data (UARTDR), offset 0x000 ............................................................................... 304 Register 2: UART Receive Status/Error Clear (UARTRSR/UARTECR), offset 0x004 ........................... 306 Register 3: UART Flag (UARTFR), offset 0x018 ................................................................................ 308 Register 4: UART IrDA Low-Power Register (UARTILPR), offset 0x020 ............................................. 310 Register 5: UART Integer Baud-Rate Divisor (UARTIBRD), offset 0x024 ............................................ 311 Register 6: UART Fractional Baud-Rate Divisor (UARTFBRD), offset 0x028 ....................................... 312 Register 7: UART Line Control (UARTLCRH), offset 0x02C ............................................................... 313 Register 8: UART Control (UARTCTL), offset 0x030 ......................................................................... 315 Register 9: UART Interrupt FIFO Level Select (UARTIFLS), offset 0x034 ........................................... 317 Register 10: UART Interrupt Mask (UARTIM), offset 0x038 ................................................................. 319 Register 11: UART Raw Interrupt Status (UARTRIS), offset 0x03C ...................................................... 321 Register 12: UART Masked Interrupt Status (UARTMIS), offset 0x040 ................................................. 322 Register 13: UART Interrupt Clear (UARTICR), offset 0x044 ............................................................... 323 Register 14: UART Peripheral Identification 4 (UARTPeriphID4), offset 0xFD0 ..................................... 325 Register 15: UART Peripheral Identification 5 (UARTPeriphID5), offset 0xFD4 ..................................... 326 Register 16: UART Peripheral Identification 6 (UARTPeriphID6), offset 0xFD8 ..................................... 327 Register 17: UART Peripheral Identification 7 (UARTPeriphID7), offset 0xFDC ..................................... 328 Register 18: UART Peripheral Identification 0 (UARTPeriphID0), offset 0xFE0 ...................................... 329 Register 19: UART Peripheral Identification 1 (UARTPeriphID1), offset 0xFE4 ...................................... 330 Register 20: UART Peripheral Identification 2 (UARTPeriphID2), offset 0xFE8 ...................................... 331 Register 21: UART Peripheral Identification 3 (UARTPeriphID3), offset 0xFEC ..................................... 332 Register 22: UART PrimeCell Identification 0 (UARTPCellID0), offset 0xFF0 ........................................ 333 Register 23: UART PrimeCell Identification 1 (UARTPCellID1), offset 0xFF4 ........................................ 334 Register 24: UART PrimeCell Identification 2 (UARTPCellID2), offset 0xFF8 ........................................ 335 Register 25: UART PrimeCell Identification 3 (UARTPCellID3), offset 0xFFC ........................................ 336 16 November 30, 2007 Preliminary Table of Contents Synchronous Serial Interface (SSI) ............................................................................................ 337 Register 1: SSI Control 0 (SSICR0), offset 0x000 .............................................................................. 349 Register 2: SSI Control 1 (SSICR1), offset 0x004 .............................................................................. 351 Register 3: SSI Data (SSIDR), offset 0x008 ...................................................................................... 353 Register 4: SSI Status (SSISR), offset 0x00C ................................................................................... 354 Register 5: SSI Clock Prescale (SSICPSR), offset 0x010 .................................................................. 356 Register 6: SSI Interrupt Mask (SSIIM), offset 0x014 ......................................................................... 357 Register 7: SSI Raw Interrupt Status (SSIRIS), offset 0x018 .............................................................. 359 Register 8: SSI Masked Interrupt Status (SSIMIS), offset 0x01C ........................................................ 360 Register 9: SSI Interrupt Clear (SSIICR), offset 0x020 ....................................................................... 361 Register 10: SSI Peripheral Identification 4 (SSIPeriphID4), offset 0xFD0 ............................................. 362 Register 11: SSI Peripheral Identification 5 (SSIPeriphID5), offset 0xFD4 ............................................. 363 Register 12: SSI Peripheral Identification 6 (SSIPeriphID6), offset 0xFD8 ............................................. 364 Register 13: SSI Peripheral Identification 7 (SSIPeriphID7), offset 0xFDC ............................................ 365 Register 14: SSI Peripheral Identification 0 (SSIPeriphID0), offset 0xFE0 ............................................. 366 Register 15: SSI Peripheral Identification 1 (SSIPeriphID1), offset 0xFE4 ............................................. 367 Register 16: SSI Peripheral Identification 2 (SSIPeriphID2), offset 0xFE8 ............................................. 368 Register 17: SSI Peripheral Identification 3 (SSIPeriphID3), offset 0xFEC ............................................ 369 Register 18: SSI PrimeCell Identification 0 (SSIPCellID0), offset 0xFF0 ............................................... 370 Register 19: SSI PrimeCell Identification 1 (SSIPCellID1), offset 0xFF4 ............................................... 371 Register 20: SSI PrimeCell Identification 2 (SSIPCellID2), offset 0xFF8 ............................................... 372 Register 21: SSI PrimeCell Identification 3 (SSIPCellID3), offset 0xFFC ............................................... 373 Inter-Integrated Circuit (I2C) Interface ........................................................................................ 374 Register 1: I2C Master Slave Address (I2CMSA), offset 0x000 ........................................................... 388 Register 2: I2C Master Control/Status (I2CMCS), offset 0x004 ........................................................... 389 Register 3: I2C Master Data (I2CMDR), offset 0x008 ......................................................................... 393 Register 4: I2C Master Timer Period (I2CMTPR), offset 0x00C ........................................................... 394 Register 5: I2C Master Interrupt Mask (I2CMIMR), offset 0x010 ......................................................... 395 Register 6: I2C Master Raw Interrupt Status (I2CMRIS), offset 0x014 ................................................. 396 Register 7: I2C Master Masked Interrupt Status (I2CMMIS), offset 0x018 ........................................... 397 Register 8: I2C Master Interrupt Clear (I2CMICR), offset 0x01C ......................................................... 398 Register 9: I2C Master Configuration (I2CMCR), offset 0x020 ............................................................ 399 Register 10: I2C Slave Own Address (I2CSOAR), offset 0x000 ............................................................ 401 Register 11: I2C Slave Control/Status (I2CSCSR), offset 0x004 ........................................................... 402 Register 12: I2C Slave Data (I2CSDR), offset 0x008 ........................................................................... 404 Register 13: I2C Slave Interrupt Mask (I2CSIMR), offset 0x00C ........................................................... 405 Register 14: I2C Slave Raw Interrupt Status (I2CSRIS), offset 0x010 ................................................... 406 Register 15: I2C Slave Masked Interrupt Status (I2CSMIS), offset 0x014 .............................................. 407 Register 16: I2C Slave Interrupt Clear (I2CSICR), offset 0x018 ............................................................ 408 Ethernet Controller ...................................................................................................................... 409 Register 1: Ethernet MAC Raw Interrupt Status (MACRIS), offset 0x000 ............................................ 418 Register 2: Ethernet MAC Interrupt Acknowledge (MACIACK), offset 0x000 ....................................... 420 Register 3: Ethernet MAC Interrupt Mask (MACIM), offset 0x004 ....................................................... 421 Register 4: Ethernet MAC Receive Control (MACRCTL), offset 0x008 ................................................ 422 Register 5: Ethernet MAC Transmit Control (MACTCTL), offset 0x00C ............................................... 423 Register 6: Ethernet MAC Data (MACDATA), offset 0x010 ................................................................. 424 Register 7: Ethernet MAC Individual Address 0 (MACIA0), offset 0x014 ............................................. 426 November 30, 2007 17 Preliminary LM3S6952 Microcontroller Register 8: Ethernet MAC Individual Address 1 (MACIA1), offset 0x018 ............................................. 427 Register 9: Ethernet MAC Threshold (MACTHR), offset 0x01C .......................................................... 428 Register 10: Ethernet MAC Management Control (MACMCTL), offset 0x020 ........................................ 429 Register 11: Ethernet MAC Management Divider (MACMDV), offset 0x024 .......................................... 430 Register 12: Ethernet MAC Management Transmit Data (MACMTXD), offset 0x02C ............................. 431 Register 13: Ethernet MAC Management Receive Data (MACMRXD), offset 0x030 .............................. 432 Register 14: Ethernet MAC Number of Packets (MACNP), offset 0x034 ............................................... 433 Register 15: Ethernet MAC Transmission Request (MACTR), offset 0x038 ........................................... 434 Register 16: Ethernet PHY Management Register 0 – Control (MR0), address 0x00 ............................. 435 Register 17: Ethernet PHY Management Register 1 – Status (MR1), address 0x01 .............................. 437 Register 18: Ethernet PHY Management Register 2 – PHY Identifier 1 (MR2), address 0x02 ................. 439 Register 19: Ethernet PHY Management Register 3 – PHY Identifier 2 (MR3), address 0x03 ................. 440 Register 20: Ethernet PHY Management Register 4 – Auto-Negotiation Advertisement (MR4), address 0x04 ............................................................................................................................. 441 Register 21: Ethernet PHY Management Register 5 – Auto-Negotiation Link Partner Base Page Ability (MR5), address 0x05 ..................................................................................................... 443 Register 22: Ethernet PHY Management Register 6 – Auto-Negotiation Expansion (MR6), address 0x06 ............................................................................................................................. 444 Register 23: Ethernet PHY Management Register 16 – Vendor-Specific (MR16), address 0x10 ............. 445 Register 24: Ethernet PHY Management Register 17 – Interrupt Control/Status (MR17), address 0x11 .............................................................................................................................. 447 Register 25: Ethernet PHY Management Register 18 – Diagnostic (MR18), address 0x12 ..................... 449 Register 26: Ethernet PHY Management Register 19 – Transceiver Control (MR19), address 0x13 ....... 450 Register 27: Ethernet PHY Management Register 23 – LED Configuration (MR23), address 0x17 ......... 451 Register 28: Ethernet PHY Management Register 24 –MDI/MDIX Control (MR24), address 0x18 .......... 452 Analog Comparators ................................................................................................................... 453 Register 1: Analog Comparator Masked Interrupt Status (ACMIS), offset 0x00 .................................... 459 Register 2: Analog Comparator Raw Interrupt Status (ACRIS), offset 0x04 ......................................... 460 Register 3: Analog Comparator Interrupt Enable (ACINTEN), offset 0x08 ........................................... 461 Register 4: Analog Comparator Reference Voltage Control (ACREFCTL), offset 0x10 ......................... 462 Register 5: Analog Comparator Status 0 (ACSTAT0), offset 0x20 ....................................................... 463 Register 6: Analog Comparator Status 1 (ACSTAT1), offset 0x40 ....................................................... 463 Register 7: Analog Comparator Status 2 (ACSTAT2), offset 0x60 ....................................................... 463 Register 8: Analog Comparator Control 0 (ACCTL0), offset 0x24 ....................................................... 464 Register 9: Analog Comparator Control 1 (ACCTL1), offset 0x44 ....................................................... 464 Register 10: Analog Comparator Control 2 (ACCTL2), offset 0x64 ...................................................... 464 Pulse Width Modulator (PWM) .................................................................................................... 466 Register 1: PWM Master Control (PWMCTL), offset 0x000 ................................................................ 473 Register 2: PWM Time Base Sync (PWMSYNC), offset 0x004 ........................................................... 474 Register 3: PWM Output Enable (PWMENABLE), offset 0x008 .......................................................... 475 Register 4: PWM Output Inversion (PWMINVERT), offset 0x00C ....................................................... 476 Register 5: PWM Output Fault (PWMFAULT), offset 0x010 ................................................................ 477 Register 6: PWM Interrupt Enable (PWMINTEN), offset 0x014 ........................................................... 478 Register 7: PWM Raw Interrupt Status (PWMRIS), offset 0x018 ........................................................ 479 Register 8: PWM Interrupt Status and Clear (PWMISC), offset 0x01C ................................................ 480 Register 9: PWM Status (PWMSTATUS), offset 0x020 ...................................................................... 481 Register 10: PWM0 Control (PWM0CTL), offset 0x040 ....................................................................... 482 Register 11: PWM1 Control (PWM1CTL), offset 0x080 ....................................................................... 482 18 November 30, 2007 Preliminary Table of Contents Register 12: PWM0 Interrupt and Trigger Enable (PWM0INTEN), offset 0x044 .................................... 484 Register 13: PWM1 Interrupt and Trigger Enable (PWM1INTEN), offset 0x084 .................................... 484 Register 14: PWM0 Raw Interrupt Status (PWM0RIS), offset 0x048 .................................................... 486 Register 15: PWM1 Raw Interrupt Status (PWM1RIS), offset 0x088 .................................................... 486 Register 16: PWM0 Interrupt Status and Clear (PWM0ISC), offset 0x04C ........................................... 487 Register 17: PWM1 Interrupt Status and Clear (PWM1ISC), offset 0x08C ........................................... 487 Register 18: PWM0 Load (PWM0LOAD), offset 0x050 ....................................................................... 488 Register 19: PWM1 Load (PWM1LOAD), offset 0x090 ....................................................................... 488 Register 20: PWM0 Counter (PWM0COUNT), offset 0x054 ................................................................ 489 Register 21: PWM1 Counter (PWM1COUNT), offset 0x094 ................................................................ 489 Register 22: PWM0 Compare A (PWM0CMPA), offset 0x058 ............................................................. 490 Register 23: PWM1 Compare A (PWM1CMPA), offset 0x098 ............................................................. 490 Register 24: PWM0 Compare B (PWM0CMPB), offset 0x05C ............................................................. 491 Register 25: PWM1 Compare B (PWM1CMPB), offset 0x09C ............................................................. 491 Register 26: PWM0 Generator A Control (PWM0GENA), offset 0x060 ................................................ 492 Register 27: PWM1 Generator A Control (PWM1GENA), offset 0x0A0 ................................................ 492 Register 28: PWM0 Generator B Control (PWM0GENB), offset 0x064 ................................................ 495 Register 29: PWM1 Generator B Control (PWM1GENB), offset 0x0A4 ................................................ 495 Register 30: PWM0 Dead-Band Control (PWM0DBCTL), offset 0x068 ................................................ 498 Register 31: PWM1 Dead-Band Control (PWM1DBCTL), offset 0x0A8 ................................................. 498 Register 32: PWM0 Dead-Band Rising-Edge Delay (PWM0DBRISE), offset 0x06C ............................. 499 Register 33: PWM1 Dead-Band Rising-Edge Delay (PWM1DBRISE), offset 0x0AC ............................. 499 Register 34: PWM0 Dead-Band Falling-Edge-Delay (PWM0DBFALL), offset 0x070 ............................. 500 Register 35: PWM1 Dead-Band Falling-Edge-Delay (PWM1DBFALL), offset 0x0B0 ............................. 500 Quadrature Encoder Interface (QEI) .......................................................................................... 501 Register 1: QEI Control (QEICTL), offset 0x000 ................................................................................ 506 Register 2: QEI Status (QEISTAT), offset 0x004 ................................................................................ 508 Register 3: QEI Position (QEIPOS), offset 0x008 .............................................................................. 509 Register 4: QEI Maximum Position (QEIMAXPOS), offset 0x00C ....................................................... 510 Register 5: QEI Timer Load (QEILOAD), offset 0x010 ....................................................................... 511 Register 6: QEI Timer (QEITIME), offset 0x014 ................................................................................. 512 Register 7: QEI Velocity Counter (QEICOUNT), offset 0x018 ............................................................. 513 Register 8: QEI Velocity (QEISPEED), offset 0x01C .......................................................................... 514 Register 9: QEI Interrupt Enable (QEIINTEN), offset 0x020 ............................................................... 515 Register 10: QEI Raw Interrupt Status (QEIRIS), offset 0x024 ............................................................. 516 Register 11: QEI Interrupt Status and Clear (QEIISC), offset 0x028 ..................................................... 517 November 30, 2007 19 Preliminary LM3S6952 Microcontroller About This Document This data sheet provides reference information for the LM3S6952 microcontroller, describing the functional blocks of the system-on-chip (SoC) device designed around the ARM® Cortex™-M3 core. Audience This manual is intended for system software developers, hardware designers, and application developers. About This Manual This document is organized into sections that correspond to each major feature. Related Documents The following documents are referenced by the data sheet, and available on the documentation CD or from the Luminary Micro web site at www.luminarymicro.com: ■ ARM® Cortex™-M3 Technical Reference Manual ■ ARM® CoreSight Technical Reference Manual ■ ARM® v7-M Architecture Application Level Reference Manual The following related documents are also referenced: ■ IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture This documentation list was current as of publication date. Please check the Luminary Micro web site for additional documentation, including application notes and white papers. Documentation Conventions This document uses the conventions shown in Table 1 on page 20. Table 1. Documentation Conventions Notation Meaning General Register Notation APB registers are indicated in uppercase bold. For example, PBORCTL is the Power-On and Brown-Out Reset Control register. If a register name contains a lowercase n, it represents more than one register. For example, SRCRn represents any (or all) of the three Software Reset Control registers: SRCR0, SRCR1 , and SRCR2. REGISTER bit A single bit in a register. bit field Two or more consecutive and related bits. A hexadecimal increment to a register's address, relative to that module's base address as specified in “Memory Map” on page 43. offset 0xnnn Registers are numbered consecutively throughout the document to aid in referencing them. The register number has no meaning to software. Register N 20 November 30, 2007 Preliminary About This Document Notation Meaning Register bits marked reserved are reserved for future use. In most cases, reserved bits are set to 0; however, user software should not rely on the value of a reserved bit. To provide software compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. reserved The range of register bits inclusive from xx to yy. For example, 31:15 means bits 15 through 31 in that register. yy:xx This value in the register bit diagram indicates whether software running on the controller can change the value of the bit field. Register Bit/Field Types RC Software can read this field. The bit or field is cleared by hardware after reading the bit/field. RO Software can read this field. Always write the chip reset value. R/W Software can read or write this field. Software can read or write this field. A write of a 0 to a W1C bit does not affect the bit value in the register. A write of a 1 clears the value of the bit in the register; the remaining bits remain unchanged. This register type is primarily used for clearing interrupt status bits where the read operation provides the interrupt status and the write of the read value clears only the interrupts being reported at the time the register was read. R/W1C Software can write this field. A write of a 0 to a W1C bit does not affect the bit value in the register. A write of a 1 clears the value of the bit in the register; the remaining bits remain unchanged. A read of the register returns no meaningful data. This register is typically used to clear the corresponding bit in an interrupt register. W1C WO Only a write by software is valid; a read of the register returns no meaningful data. Register Bit/Field This value in the register bit diagram shows the bit/field value after any reset, unless noted. Reset Value 0 Bit cleared to 0 on chip reset. 1 Bit set to 1 on chip reset. - Nondeterministic. Pin/Signal Notation [ ] Pin alternate function; a pin defaults to the signal without the brackets. pin Refers to the physical connection on the package. signal Refers to the electrical signal encoding of a pin. Change the value of the signal from the logically False state to the logically True state. For active High signals, the asserted signal value is 1 (High); for active Low signals, the asserted signal value is 0 (Low). The active polarity (High or Low) is defined by the signal name (see SIGNAL and SIGNAL below). assert a signal deassert a signal Change the value of the signal from the logically True state to the logically False state. Signal names are in uppercase and in the Courier font. An overbar on a signal name indicates that it is active Low. To assert SIGNAL is to drive it Low; to deassert SIGNAL is to drive it High. SIGNAL Signal names are in uppercase and in the Courier font. An active High signal has no overbar. To assert SIGNAL is to drive it High; to deassert SIGNAL is to drive it Low. SIGNAL Numbers An uppercase X indicates any of several values is allowed, where X can be any legal pattern. For example, a binary value of 0X00 can be either 0100 or 0000, a hex value of 0xX is 0x0 or 0x1, and so on. X Hexadecimal numbers have a prefix of 0x. For example, 0x00FF is the hexadecimal number FF. All other numbers within register tables are assumed to be binary. Within conceptual information, binary numbers are indicated with a b suffix, for example, 1011b, and decimal numbers are written without a prefix or suffix. 0x November 30, 2007 21 Preliminary LM3S6952 Microcontroller 1 Architectural Overview The Luminary Micro Stellaris® family of microcontrollers—the first ARM® Cortex™-M3 based controllers—brings high-performance 32-bit computing to cost-sensitive embedded microcontroller applications. These pioneering parts deliver customers 32-bit performance at a cost equivalent to legacy 8- and 16-bit devices, all in a package with a small footprint. The Stellaris® family offers efficient performance and extensive integration, favorably positioning the device into cost-conscious applications requiring significant control-processing and connectivity capabilities. The Stellaris® LM3S1000 series extends the Stellaris® family with larger on-chip memories, enhanced power management, and expanded I/O and control capabilities. The Stellaris® LM3S2000 series, designed for Controller Area Network (CAN) applications, extends the Stellaris family with Bosch CAN networking technology, the golden standard in short-haul industrial networks. The Stellaris® LM3S2000 series also marks the first integration of CAN capabilities with the revolutionary Cortex-M3 core. The Stellaris® LM3S6000 series combines both a 10/100 Ethernet Media Access Control (MAC) and Physical (PHY) layer, marking the first time that integrated connectivity is available with an ARM Cortex-M3 MCU and the only integrated 10/100 Ethernet MAC and PHY available in an ARM architecture MCU. The Stellaris® LM3S8000 series combines Bosch Controller Area Network technology with both a 10/100 Ethernet Media Access Control (MAC) and Physical (PHY) layer. The LM3S6952 microcontroller is targeted for industrial applications, including remote monitoring, electronic point-of-sale machines, test and measurement equipment, network appliances and switches, factory automation, HVAC and building control, gaming equipment, motion control, medical instrumentation, and fire and security. For applications requiring extreme conservation of power, the LM3S6952 microcontroller features a Battery-backed Hibernation module to efficiently power down the LM3S6952 to a low-power state during extended periods of inactivity. With a power-up/power-down sequencer, a continuous time counter (RTC), a pair of match registers, an APB interface to the system bus, and dedicated non-volatile memory, the Hibernation module positions the LM3S6952 microcontroller perfectly for battery applications. In addition, the LM3S6952 microcontroller offers the advantages of ARM's widely available development tools, System-on-Chip (SoC) infrastructure IP applications, and a large user community. Additionally, the microcontroller uses ARM's Thumb®-compatible Thumb-2 instruction set to reduce memory requirements and, thereby, cost. Finally, the LM3S6952 microcontroller is code-compatible to all members of the extensive Stellaris® family; providing flexibility to fit our customers' precise needs. Luminary Micro offers a complete solution to get to market quickly, with evaluation and development boards, white papers and application notes, an easy-to-use peripheral driver library, and a strong support, sales, and distributor network. 1.1 Product Features The LM3S6952 microcontroller includes the following product features: ■ 32-Bit RISC Performance – 32-bit ARM® Cortex™-M3 v7M architecture optimized for small-footprint embedded applications 22 November 30, 2007 Preliminary Architectural Overview – System timer (SysTick), providing a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism – Thumb®-compatible Thumb-2-only instruction set processor core for high code density – 50-MHz operation – Hardware-division and single-cycle-multiplication – Integrated Nested Vectored Interrupt Controller (NVIC) providing deterministic interrupt handling – 34 interrupts with eight priority levels – Memory protection unit (MPU), providing a privileged mode for protected operating system functionality – Unaligned data access, enabling data to be efficiently packed into memory – Atomic bit manipulation (bit-banding), delivering maximum memory utilization and streamlined peripheral control ■ Internal Memory – 256 KB single-cycle flash • User-managed flash block protection on a 2-KB block basis • User-managed flash data programming • User-defined and managed flash-protection block – 64 KB single-cycle SRAM ■ General-Purpose Timers – Three General-Purpose Timer Modules (GPTM), each of which provides two 16-bit timers. Each GPTM can be configured to operate independently: • As a single 32-bit timer • As one 32-bit Real-Time Clock (RTC) to event capture • For Pulse Width Modulation (PWM) • To trigger analog-to-digital conversions – 32-bit Timer modes • Programmable one-shot timer • Programmable periodic timer • Real-Time Clock when using an external 32.768-KHz clock as the input November 30, 2007 23 Preliminary LM3S6952 Microcontroller • User-enabled stalling in periodic and one-shot mode when the controller asserts the CPU Halt flag during debug • ADC event trigger – 16-bit Timer modes • General-purpose timer function with an 8-bit prescaler • Programmable one-shot timer • Programmable periodic timer • User-enabled stalling when the controller asserts CPU Halt flag during debug • ADC event trigger – 16-bit Input Capture modes • Input edge count capture • Input edge time capture – 16-bit PWM mode • Simple PWM mode with software-programmable output inversion of the PWM signal ■ ARM FiRM-compliant Watchdog Timer – 32-bit down counter with a programmable load register – Separate watchdog clock with an enable – Programmable interrupt generation logic with interrupt masking – Lock register protection from runaway software – Reset generation logic with an enable/disable – User-enabled stalling when the controller asserts the CPU Halt flag during debug ■ 10/100 Ethernet Controller – Conforms to the IEEE 802.3-2002 Specification – Full- and half-duplex for both 100 Mbps and 10 Mbps operation – Integrated 10/100 Mbps Transceiver (PHY) – Automatic MDI/MDI-X cross-over correction – Programmable MAC address – Power-saving and power-down modes ■ Synchronous Serial Interface (SSI) 24 November 30, 2007 Preliminary Architectural Overview – Master or slave operation – Programmable clock bit rate and prescale – Separate transmit and receive FIFOs, 16 bits wide, 8 locations deep – Programmable interface operation for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces – Programmable data frame size from 4 to 16 bits – Internal loopback test mode for diagnostic/debug testing ■ UART – Three fully programmable 16C550-type UARTs with IrDA support – Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs to reduce CPU interrupt service loading – Programmable baud-rate generator with fractional divider – Programmable FIFO length, including 1-byte deep operation providing conventional double-buffered interface – FIFO trigger levels of 1/8, 1/4, 1/2, 3/4, and 7/8 – Standard asynchronous communication bits for start, stop, and parity – False-start-bit detection – Line-break generation and detection ■ ADC – Single- and differential-input configurations – Three 10-bit channels (inputs) when used as single-ended inputs – Sample rate of 500 thousand samples/second – Flexible, configurable analog-to-digital conversion – Four programmable sample conversion sequences from one to eight entries long, with corresponding conversion result FIFOs – Each sequence triggered by software or internal event (timers, analog comparators, PWM or GPIO) – On-chip temperature sensor ■ Analog Comparators – Three independent integrated analog comparators November 30, 2007 25 Preliminary LM3S6952 Microcontroller – Configurable for output to: drive an output pin, generate an interrupt, or initiate an ADC sample sequence – Compare external pin input to external pin input or to internal programmable voltage reference ■ I2C – Master and slave receive and transmit operation with transmission speed up to 100 Kbps in Standard mode and 400 Kbps in Fast mode – Interrupt generation – Master with arbitration and clock synchronization, multimaster support, and 7-bit addressing mode ■ PWM – Two PWM generator blocks, each with one 16-bit counter, two comparators, a PWM generator, and a dead-band generator – One 16-bit counter • Runs in Down or Up/Down mode • Output frequency controlled by a 16-bit load value • Load value updates can be synchronized • Produces output signals at zero and load value – Two PWM comparators • Comparator value updates can be synchronized • Produces output signals on match – PWM generator • Output PWM signal is constructed based on actions taken as a result of the counter and PWM comparator output signals • Produces two independent PWM signals – Dead-band generator • Produces two PWM signals with programmable dead-band delays suitable for driving a half-H bridge • Can be bypassed, leaving input PWM signals unmodified – Flexible output control block with PWM output enable of each PWM signal • PWM output enable of each PWM signal • Optional output inversion of each PWM signal (polarity control) 26 November 30, 2007 Preliminary Architectural Overview • Optional fault handling for each PWM signal • Synchronization of timers in the PWM generator blocks • Synchronization of timer/comparator updates across the PWM generator blocks • Interrupt status summary of the PWM generator blocks – Can initiate an ADC sample sequence ■ QEI – Hardware position integrator tracks the encoder position – Velocity capture using built-in timer – Interrupt generation on index pulse, velocity-timer expiration, direction change, and quadrature error detection ■ GPIOs – 6-43 GPIOs, depending on configuration – 5-V-tolerant input/outputs – Programmable interrupt generation as either edge-triggered or level-sensitive – Bit masking in both read and write operations through address lines – Can initiate an ADC sample sequence – Programmable control for GPIO pad configuration: • Weak pull-up or pull-down resistors • 2-mA, 4-mA, and 8-mA pad drive • Slew rate control for the 8-mA drive • Open drain enables • Digital input enables ■ Power – On-chip Low Drop-Out (LDO) voltage regulator, with programmable output user-adjustable from 2.25 V to 2.75 V – Hibernation module handles the power-up/down 3.3 V sequencing and control for the core digital logic and analog circuits – Low-power options on controller: Sleep and Deep-sleep modes – Low-power options for peripherals: software controls shutdown of individual peripherals – User-enabled LDO unregulated voltage detection and automatic reset November 30, 2007 27 Preliminary LM3S6952 Microcontroller – 3.3-V supply brown-out detection and reporting via interrupt or reset ■ Flexible Reset Sources – Power-on reset (POR) – Reset pin assertion – Brown-out (BOR) detector alerts to system power drops – Software reset – Watchdog timer reset – Internal low drop-out (LDO) regulator output goes unregulated ■ Additional Features – Six reset sources – Programmable clock source control – Clock gating to individual peripherals for power savings – IEEE 1149.1-1990 compliant Test Access Port (TAP) controller – Debug access via JTAG and Serial Wire interfaces – Full JTAG boundary scan ■ Industrial-range 100-pin RoHS-compliant LQFP package 1.2 Target Applications ■ Remote monitoring ■ Electronic point-of-sale (POS) machines ■ Test and measurement equipment ■ Network appliances and switches ■ Factory automation ■ HVAC and building control ■ Gaming equipment ■ Motion control ■ Medical instrumentation ■ Fire and security ■ Power and energy ■ Transportation 28 November 30, 2007 Preliminary Architectural Overview 1.3 High-Level Block Diagram Figure 1-1 on page 29 represents the full set of features in the Stellaris® 6000 series of devices; not all features may be available on the LM3S6952 microcontroller. Figure 1-1. Stellaris® 6000 Series High-Level Block Diagram 1.4 Functional Overview The following sections provide an overview of the features of the LM3S6952 microcontroller. The page number in parenthesis indicates where that feature is discussed in detail. Ordering and support information can be found in “Ordering and Contact Information” on page 575. November 30, 2007 29 Preliminary LM3S6952 Microcontroller 1.4.1 ARM Cortex™-M3 1.4.1.1 Processor Core (see page 37) All members of the Stellaris® product family, including the LM3S6952 microcontroller, are designed around an ARM Cortex™-M3 processor core. The ARM Cortex-M3 processor provides the core for a high-performance, low-cost platform that meets the needs of minimal memory implementation, reduced pin count, and low-power consumption, while delivering outstanding computational performance and exceptional system response to interrupts. “ARM Cortex-M3 Processor Core” on page 37 provides an overview of the ARM core; the core is detailed in the ARM® Cortex™-M3 Technical Reference Manual. 1.4.1.2 System Timer (SysTick) Cortex-M3 includes an integrated system timer, SysTick. SysTick provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism. The counter can be used in several different ways, for example: ■ An RTOS tick timer which fires at a programmable rate (for example, 100 Hz) and invokes a SysTick routine. ■ A high-speed alarm timer using the system clock. ■ A variable rate alarm or signal timer—the duration is range-dependent on the reference clock used and the dynamic range of the counter. ■ A simple counter. Software can use this to measure time to completion and time used. ■ An internal clock source control based on missing/meeting durations. The COUNTFLAG bit-field in the control and status register can be used to determine if an action completed within a set duration, as part of a dynamic clock management control loop. 1.4.1.3 Nested Vectored Interrupt Controller (NVIC) The LM3S6952 controller includes the ARM Nested Vectored Interrupt Controller (NVIC) on the ARM Cortex-M3 core. The NVIC and Cortex-M3 prioritize and handle all exceptions. All exceptions are handled in Handler Mode. The processor state is automatically stored to the stack on an exception, and automatically restored from the stack at the end of the Interrupt Service Routine (ISR). The vector is fetched in parallel to the state saving, which enables efficient interrupt entry. The processor supports tail-chaining, which enables back-to-back interrupts to be performed without the overhead of state saving and restoration. Software can set eight priority levels on 7 exceptions (system handlers) and 34 interrupts. “Interrupts” on page 45 provides an overview of the NVIC controller and the interrupt map. Exceptions and interrupts are detailed in the ARM® Cortex™-M3 Technical Reference Manual. 1.4.2 Motor Control Peripherals To enhance motor control, the LM3S6952 controller features Pulse Width Modulation (PWM) outputs and the Quadrature Encoder Interface (QEI). 1.4.2.1 PWM Pulse width modulation (PWM) is a powerful technique for digitally encoding analog signal levels. High-resolution counters are used to generate a square wave, and the duty cycle of the square 30 November 30, 2007 Preliminary Architectural Overview wave is modulated to encode an analog signal. Typical applications include switching power supplies and motor control. On the LM3S6952, PWM motion control functionality can be achieved through: ■ Dedicated, flexible motion control hardware using the PWM pins ■ The motion control features of the general-purpose timers using the CCP pins PWM Pins (see page 466) The LM3S6952 PWM module consists of two PWM generator blocks and a control block. Each PWM generator block contains one timer (16-bit down or up/down counter), two comparators, a PWM signal generator, a dead-band generator, and an interrupt/ADC-trigger selector. The control block determines the polarity of the PWM signals, and which signals are passed through to the pins. Each PWM generator block produces two PWM signals that can either be independent signals or a single pair of complementary signals with dead-band delays inserted. The output of the PWM generation blocks are managed by the output control block before being passed to the device pins. CCP Pins (see page 210) The General-Purpose Timer Module's CCP (Capture Compare PWM) pins are software programmable to support a simple PWM mode with a software-programmable output inversion of the PWM signal. 1.4.2.2 QEI (see page 501) A quadrature encoder, also known as a 2-channel incremental encoder, converts linear displacement into a pulse signal. By monitoring both the number of pulses and the relative phase of the two signals, you can track the position, direction of rotation, and speed. In addition, a third channel, or index signal, can be used to reset the position counter. The Stellaris quadrature encoder with index (QEI) module interprets the code produced by a quadrature encoder wheel to integrate position over time and determine direction of rotation. In addition, it can capture a running estimate of the velocity of the encoder wheel. 1.4.3 Analog Peripherals To handle analog signals, the LM3S6952 microcontroller offers an Analog-to-Digital Converter (ADC). For support of analog signals, the LM3S6952 microcontroller offers three analog comparators. 1.4.3.1 ADC (see page 263) An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a discrete digital number. The LM3S6952 ADC module features 10-bit conversion resolution and supports three input channels, plus an internal temperature sensor. Four buffered sample sequences allow rapid sampling of up to eight analog input sources without controller intervention. Each sample sequence provides flexible programming with fully configurable input source, trigger events, interrupt generation, and sequence priority. 1.4.3.2 Analog Comparators (see page 453) An analog comparator is a peripheral that compares two analog voltages, and provides a logical output that signals the comparison result. November 30, 2007 31 Preliminary LM3S6952 Microcontroller The LM3S6952 microcontroller provides three independent integrated analog comparators that can be configured to drive an output or generate an interrupt or ADC event. A comparator can compare a test voltage against any one of these voltages: ■ An individual external reference voltage ■ A shared single external reference voltage ■ A shared internal reference voltage The comparator can provide its output to a device pin, acting as a replacement for an analog comparator on the board, or it can be used to signal the application via interrupts or triggers to the ADC to cause it to start capturing a sample sequence. The interrupt generation and ADC triggering logic is separate. This means, for example, that an interrupt can be generated on a rising edge and the ADC triggered on a falling edge. 1.4.4 Serial Communications Peripherals The LM3S6952 controller supports both asynchronous and synchronous serial communications with: ■ Three fully programmable 16C550-type UARTs ■ One SSI module ■ One I2C module ■ Ethernet controller 1.4.4.1 UART (see page 296) A Universal Asynchronous Receiver/Transmitter (UART) is an integrated circuit used for RS-232C serial communications, containing a transmitter (parallel-to-serial converter) and a receiver (serial-to-parallel converter), each clocked separately. The LM3S6952 controller includes three fully programmable 16C550-type UARTs that support data transfer speeds up to 460.8 Kbps. (Although similar in functionality to a 16C550 UART, it is not register-compatible.) In addition, each UART is capable of supporting IrDA. Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs reduce CPU interrupt service loading. The UART can generate individually masked interrupts from the RX, TX, modem status, and error conditions. The module provides a single combined interrupt when any of the interrupts are asserted and are unmasked. 1.4.4.2 SSI (see page 337) Synchronous Serial Interface (SSI) is a four-wire bi-directional communications interface. The LM3S6952 controller includes one SSI module that provides the functionality for synchronous serial communications with peripheral devices, and can be configured to use the Freescale SPI, MICROWIRE, or TI synchronous serial interface frame formats. The size of the data frame is also configurable, and can be set between 4 and 16 bits, inclusive. The SSI module performs serial-to-parallel conversion on data received from a peripheral device, and parallel-to-serial conversion on data transmitted to a peripheral device. The TX and RX paths are buffered with internal FIFOs, allowing up to eight 16-bit values to be stored independently. 32 November 30, 2007 Preliminary Architectural Overview The SSI module can be configured as either a master or slave device. As a slave device, the SSI module can also be configured to disable its output, which allows a master device to be coupled with multiple slave devices. The SSI module also includes a programmable bit rate clock divider and prescaler to generate the output serial clock derived from the SSI module's input clock. Bit rates are generated based on the input clock and the maximum bit rate is determined by the connected peripheral. 1.4.4.3 I2C (see page 374) The Inter-Integrated Circuit (I2C) bus provides bi-directional data transfer through a two-wire design (a serial data line SDA and a serial clock line SCL). The I2C bus interfaces to external I2C devices such as serial memory (RAMs and ROMs), networking devices, LCDs, tone generators, and so on. The I2C bus may also be used for system testing and diagnostic purposes in product development and manufacture. The LM3S6952 controller includes one I2C module that provides the ability to communicate to other IC devices over an I2C bus. The I2C bus supports devices that can both transmit and receive (write and read) data. Devices on the I2C bus can be designated as either a master or a slave. The I2C module supports both sending and receiving data as either a master or a slave, and also supports the simultaneous operation as both a master and a slave. The four I2C modes are: Master Transmit, Master Receive, Slave Transmit, and Slave Receive. A Stellaris® I2C module can operate at two speeds: Standard (100 Kbps) and Fast (400 Kbps). Both the I2C master and slave can generate interrupts. The I2C master generates interrupts when a transmit or receive operation completes (or aborts due to an error). The I2C slave generates interrupts when data has been sent or requested by a master. 1.4.4.4 Ethernet Controller (see page 409) Ethernet is a frame-based computer networking technology for local area networks (LANs). Ethernet has been standardized as IEEE 802.3. It defines a number of wiring and signaling standards for the physical layer, two means of network access at the Media Access Control (MAC)/Data Link Layer, and a common addressing format. The Stellaris® Ethernet Controller consists of a fully integrated media access controller (MAC) and network physical (PHY) interface device. The Ethernet Controller conforms to IEEE 802.3 specifications and fully supports 10BASE-T and 100BASE-TX standards. In addition, the Ethernet Controller supports automatic MDI/MDI-X cross-over correction. 1.4.5 System Peripherals 1.4.5.1 Programmable GPIOs (see page 163) General-purpose input/output (GPIO) pins offer flexibility for a variety of connections. The Stellaris® GPIO module is composed of seven physical GPIO blocks, each corresponding to an individual GPIO port. The GPIO module is FiRM-compliant (compliant to the ARM Foundation IP for Real-Time Microcontrollers specification) and supports 6-43 programmable input/output pins. The number of GPIOs available depends on the peripherals being used (see “Signal Tables” on page 519 for the signals available to each GPIO pin). November 30, 2007 33 Preliminary LM3S6952 Microcontroller The GPIO module features programmable interrupt generation as either edge-triggered or level-sensitive on all pins, programmable control for GPIO pad configuration, and bit masking in both read and write operations through address lines. 1.4.5.2 Three Programmable Timers (see page 204) Programmable timers can be used to count or time external events that drive the Timer input pins. The Stellaris® General-Purpose Timer Module (GPTM) contains three GPTM blocks. Each GPTM block provides two 16-bit timers/counters that can be configured to operate independently as timers or event counters, or configured to operate as one 32-bit timer or one 32-bit Real-Time Clock (RTC). Timers can also be used to trigger analog-to-digital (ADC) conversions. When configured in 32-bit mode, a timer can run as a Real-Time Clock (RTC), one-shot timer or periodic timer. When in 16-bit mode, a timer can run as a one-shot timer or periodic timer, and can extend its precision by using an 8-bit prescaler. A 16-bit timer can also be configured for event capture or Pulse Width Modulation (PWM) generation. 1.4.5.3 Watchdog Timer (see page 240) A watchdog timer can generate nonmaskable interrupts (NMIs) or a reset when a time-out value is reached. The watchdog timer is used to regain control when a system has failed due to a software error or to the failure of an external device to respond in the expected way. The Stellaris® Watchdog Timer module consists of a 32-bit down counter, a programmable load register, interrupt generation logic, and a locking register. The Watchdog Timer can be configured to generate an interrupt to the controller on its first time-out, and to generate a reset signal on its second time-out. Once the Watchdog Timer has been configured, the lock register can be written to prevent the timer configuration from being inadvertently altered. 1.4.6 Memory Peripherals The LM3S6952 controller offers both single-cycle SRAM and single-cycle Flash memory. 1.4.6.1 SRAM (see page 139) The LM3S6952 static random access memory (SRAM) controller supports 64 KB SRAM. The internal SRAM of the Stellaris® devices is located at offset 0x0000.0000 of the device memory map. To reduce the number of time-consuming read-modify-write (RMW) operations, ARM has introduced bit-banding technology in the new Cortex-M3 processor. With a bit-band-enabled processor, certain regions in the memory map (SRAM and peripheral space) can use address aliases to access individual bits in a single, atomic operation. 1.4.6.2 Flash (see page 140) The LM3S6952 Flash controller supports 256 KB of flash memory. The flash is organized as a set of 1-KB blocks that can be individually erased. Erasing a block causes the entire contents of the block to be reset to all 1s. These blocks are paired into a set of 2-KB blocks that can be individually protected. The blocks can be marked as read-only or execute-only, providing different levels of code protection. Read-only blocks cannot be erased or programmed, protecting the contents of those blocks from being modified. Execute-only blocks cannot be erased or programmed, and can only be read by the controller instruction fetch mechanism, protecting the contents of those blocks from being read by either the controller or by a debugger. 34 November 30, 2007 Preliminary Architectural Overview 1.4.7 Additional Features 1.4.7.1 Memory Map (see page 43) A memory map lists the location of instructions and data in memory. The memory map for the LM3S6952 controller can be found in “Memory Map” on page 43. Register addresses are given as a hexadecimal increment, relative to the module's base address as shown in the memory map. The ARM® Cortex™-M3 Technical Reference Manual provides further information on the memory map. 1.4.7.2 JTAG TAP Controller (see page 48) The Joint Test Action Group (JTAG) port provides a standardized serial interface for controlling the Test Access Port (TAP) and associated test logic. The TAP, JTAG instruction register, and JTAG data registers can be used to test the interconnects of assembled printed circuit boards, obtain manufacturing information on the components, and observe and/or control the inputs and outputs of the controller during normal operation. The JTAG port provides a high degree of testability and chip-level access at a low cost. The JTAG port is comprised of the standard five pins: TRST, TCK, TMS, TDI, and TDO. Data is transmitted serially into the controller on TDI and out of the controller on TDO. The interpretation of this data is dependent on the current state of the TAP controller. For detailed information on the operation of the JTAG port and TAP controller, please refer to the IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture. The Luminary Micro JTAG controller works with the ARM JTAG controller built into the Cortex-M3 core. This is implemented by multiplexing the TDO outputs from both JTAG controllers. ARM JTAG instructions select the ARM TDO output while Luminary Micro JTAG instructions select the Luminary Micro TDO outputs. The multiplexer is controlled by the Luminary Micro JTAG controller, which has comprehensive programming for the ARM, Luminary Micro, and unimplemented JTAG instructions. 1.4.7.3 System Control and Clocks (see page 59) System control determines the overall operation of the device. It provides information about the device, controls the clocking of the device and individual peripherals, and handles reset detection and reporting. 1.4.7.4 Hibernation Module (see page 120) The Hibernation module provides logic to switch power off to the main processor and peripherals, and to wake on external or time-based events. The Hibernation module includes power-sequencing logic, a real-time clock with a pair of match registers, low-battery detection circuitry, and interrupt signalling to the processor. It also includes 64 32-bit words of non-volatile memory that can be used for saving state during hibernation. 1.4.8 Hardware Details Details on the pins and package can be found in the following sections: ■ “Pin Diagram” on page 518 ■ “Signal Tables” on page 519 ■ “Operating Characteristics” on page 533 ■ “Electrical Characteristics” on page 534 November 30, 2007 35 Preliminary LM3S6952 Microcontroller ■ “Package Information” on page 549 36 November 30, 2007 Preliminary Architectural Overview 2 ARM Cortex-M3 Processor Core The ARM Cortex-M3 processor provides the core for a high-performance, low-cost platform that meets the needs of minimal memory implementation, reduced pin count, and low power consumption, while delivering outstanding computational performance and exceptional system response to interrupts. Features include: ■ Compact core. ■ Thumb-2 instruction set, delivering the high-performance expected of an ARM core in the memory size usually associated with 8- and 16-bit devices; typically in the range of a few kilobytes of memory for microcontroller class applications. ■ Rapid application execution through Harvard architecture characterized by separate buses for instruction and data. ■ Exceptional interrupt handling, by implementing the register manipulations required for handling an interrupt in hardware. ■ Memory protection unit (MPU) to provide a privileged mode of operation for complex applications. ■ Migration from the ARM7™ processor family for better performance and power efficiency. ■ Full-featured debug solution with a: – Serial Wire JTAG Debug Port (SWJ-DP) – Flash Patch and Breakpoint (FPB) unit for implementing breakpoints – Data Watchpoint and Trigger (DWT) unit for implementing watchpoints, trigger resources, and system profiling – Instrumentation Trace Macrocell (ITM) for support of printf style debugging – Trace Port Interface Unit (TPIU) for bridging to a Trace Port Analyzer The Stellaris® family of microcontrollers builds on this core to bring high-performance 32-bit computing to cost-sensitive embedded microcontroller applications, such as factory automation and control, industrial control power devices, building and home automation, and stepper motors. For more information on the ARM Cortex-M3 processor core, see the ARM® Cortex™-M3 Technical Reference Manual. For information on SWJ-DP, see the ARM® CoreSight Technical Reference Manual. November 30, 2007 37 Preliminary LM3S6952 Microcontroller 2.1 Block Diagram Figure 2-1. CPU Block Diagram Private Peripheral Bus (internal) Data Watchpoint and Trace Interrupts Debug Sleep Instrumentation Trace Macrocell Trace Port Interface Unit CM3 Core Instructions Data Flash Patch and Breakpoint Memory Protection Unit Adv. High- Perf. Bus Access Port Nested Vectored Interrupt Controller Serial Wire JTAG Debug Port Bus Matrix Adv. Peripheral Bus I-code bus D-code bus System bus ROM Table Private Peripheral Bus (external) Serial Wire Output Trace Port (SWO) ARM Cortex-M3 2.2 Functional Description Important: The ARM® Cortex™-M3 Technical Reference Manual describes all the features of an ARM Cortex-M3 in detail. However, these features differ based on the implementation. This section describes the Stellaris® implementation. Luminary Micro has implemented the ARM Cortex-M3 core as shown in Figure 2-1 on page 38. As noted in the ARM® Cortex™-M3 Technical Reference Manual, several Cortex-M3 components are flexible in their implementation: SW/JTAG-DP, ETM, TPIU, the ROM table, the MPU, and the Nested Vectored Interrupt Controller (NVIC). Each of these is addressed in the sections that follow. 2.2.1 Serial Wire and JTAG Debug Luminary Micro has replaced the ARM SW-DP and JTAG-DP with the ARM CoreSight™-compliant Serial Wire JTAG Debug Port (SWJ-DP) interface. This means Chapter 12, “Debug Port,” of the ARM® Cortex™-M3 Technical Reference Manual does not apply to Stellaris® devices. The SWJ-DP interface combines the SWD and JTAG debug ports into one module. See the CoreSight™ Design Kit Technical Reference Manual for details on SWJ-DP. 38 November 30, 2007 Preliminary ARM Cortex-M3 Processor Core 2.2.2 Embedded Trace Macrocell (ETM) ETM was not implemented in the Stellaris® devices. This means Chapters 15 and 16 of the ARM® Cortex™-M3 Technical Reference Manual can be ignored. 2.2.3 Trace Port Interface Unit (TPIU) The TPIU acts as a bridge between the Cortex-M3 trace data from the ITM, and an off-chip Trace Port Analyzer. The Stellaris® devices have implemented TPIU as shown in Figure 2-2 on page 39. This is similar to the non-ETM version described in the ARM® Cortex™-M3 Technical Reference Manual, however, SWJ-DP only provides SWV output for the TPIU. Figure 2-2. TPIU Block Diagram ATB Interface Asynchronous FIFO APB Interface Trace Out (serializer) Debug ATB Slave Port APB Slave Port Serial Wire Trace Port (SWO) 2.2.4 ROM Table The default ROM table was implemented as described in the ARM® Cortex™-M3 Technical Reference Manual. 2.2.5 Memory Protection Unit (MPU) The Memory Protection Unit (MPU) is included on the LM3S6952 controller and supports the standard ARMv7 Protected Memory System Architecture (PMSA) model. The MPU provides full support for protection regions, overlapping protection regions, access permissions, and exporting memory attributes to the system. 2.2.6 Nested Vectored Interrupt Controller (NVIC) The Nested Vectored Interrupt Controller (NVIC): ■ Facilitates low-latency exception and interrupt handling ■ Controls power management ■ Implements system control registers November 30, 2007 39 Preliminary LM3S6952 Microcontroller The NVIC supports up to 240 dynamically reprioritizable interrupts each with up to 256 levels of priority. The NVIC and the processor core interface are closely coupled, which enables low latency interrupt processing and efficient processing of late arriving interrupts. The NVIC maintains knowledge of the stacked (nested) interrupts to enable tail-chaining of interrupts. You can only fully access the NVIC from privileged mode, but you can pend interrupts in user-mode if you enable the Configuration Control Register (see the ARM® Cortex™-M3 Technical Reference Manual). Any other user-mode access causes a bus fault. All NVIC registers are accessible using byte, halfword, and word unless otherwise stated. All NVIC registers and system debug registers are little endian regardless of the endianness state of the processor. 2.2.6.1 Interrupts The ARM® Cortex™-M3 Technical Reference Manual describes the maximum number of interrupts and interrupt priorities. The LM3S6952 microcontroller supports 34 interrupts with eight priority levels. 2.2.6.2 System Timer (SysTick) Cortex-M3 includes an integrated system timer, SysTick. SysTick provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism. The counter can be used in several different ways, for example: ■ An RTOS tick timer which fires at a programmable rate (for example, 100 Hz) and invokes a SysTick routine. ■ A high-speed alarm timer using the system clock. ■ A variable rate alarm or signal timer—the duration is range-dependent on the reference clock used and the dynamic range of the counter. ■ A simple counter. Software can use this to measure time to completion and time used. ■ An internal clock source control based on missing/meeting durations. The COUNTFLAG bit-field in the control and status register can be used to determine if an action completed within a set duration, as part of a dynamic clock management control loop. Functional Description The timer consists of three registers: ■ A control and status counter to configure its clock, enable the counter, enable the SysTick interrupt, and determine counter status. ■ The reload value for the counter, used to provide the counter's wrap value. ■ The current value of the counter. A fourth register, the SysTick Calibration Value Register, is not implemented in the Stellaris® devices. When enabled, the timer counts down from the reload value to zero, reloads (wraps) to the value in the SysTick Reload Value register on the next clock edge, then decrements on subsequent clocks. Writing a value of zero to the Reload Value register disables the counter on the next wrap. When the counter reaches zero, the COUNTFLAG status bit is set. The COUNTFLAG bit clears on reads. 40 November 30, 2007 Preliminary ARM Cortex-M3 Processor Core Writing to the Current Value register clears the register and the COUNTFLAG status bit. The write does not trigger the SysTick exception logic. On a read, the current value is the value of the register at the time the register is accessed. If the core is in debug state (halted), the counter will not decrement. The timer is clocked with respect to a reference clock. The reference clock can be the core clock or an external clock source. SysTick Control and Status Register Use the SysTick Control and Status Register to enable the SysTick features. The reset is 0x0000.0000. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:17 reserved RO 0 Returns 1 if timer counted to 0 since last time this was read. Clears on read by application. If read by the debugger using the DAP, this bit is cleared on read-only if the MasterType bit in the AHB-AP Control Register is set to 0. Otherwise, the COUNTFLAG bit is not changed by the debugger read. 16 COUNTFLAG R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:3 reserved RO 0 0 = external reference clock. (Not implemented for Stellaris microcontrollers.) 1 = core clock. If no reference clock is provided, it is held at 1 and so gives the same time as the core clock. The core clock must be at least 2.5 times faster than the reference clock. If it is not, the count values are unpredictable. 2 CLKSOURCE R/W 0 1 = counting down to 0 pends the SysTick handler. 0 = counting down to 0 does not pend the SysTick handler. Software can use the COUNTFLAG to determine if ever counted to 0. 1 TICKINT R/W 0 1 = counter operates in a multi-shot way. That is, counter loads with the Reload value and then begins counting down. On reaching 0, it sets the COUNTFLAG to 1 and optionally pends the SysTick handler, based on TICKINT. It then loads the Reload value again, and begins counting. 0 = counter disabled. 0 ENABLE R/W 0 SysTick Reload Value Register Use the SysTick Reload Value Register to specify the start value to load into the current value register when the counter reaches 0. It can be any value between 1 and 0x00FF.FFFF. A start value of 0 is possible, but has no effect because the SysTick interrupt and COUNTFLAG are activated when counting from 1 to 0. Therefore, as a multi-shot timer, repeated over and over, it fires every N+1 clock pulse, where N is any value from 1 to 0x00FF.FFFF. So, if the tick interrupt is required every 100 clock pulses, 99 must be written into the RELOAD. If a new value is written on each tick interrupt, so treated as single shot, then the actual count down must be written. For example, if a tick is next required after 400 clock pulses, 400 must be written into the RELOAD. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:24 reserved RO 0 November 30, 2007 41 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description 23:0 RELOAD W1C - Value to load into the SysTick Current Value Register when the counter reaches 0. SysTick Current Value Register Use the SysTick Current Value Register to find the current value in the register. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:24 reserved RO 0 Current value at the time the register is accessed. No read-modify-write protection is provided, so change with care. This register is write-clear. Writing to it with any value clears the register to 0. Clearing this register also clears the COUNTFLAG bit of the SysTick Control and Status Register. 23:0 CURRENT W1C - SysTick Calibration Value Register The SysTick Calibration Value register is not implemented. 42 November 30, 2007 Preliminary ARM Cortex-M3 Processor Core 3 Memory Map The memory map for the LM3S6952 controller is provided in Table 3-1 on page 43. In this manual, register addresses are given as a hexadecimal increment, relative to the module’s base address as shown in the memory map. See also Chapter 4, “Memory Map” in the ARM® Cortex™-M3 Technical Reference Manual. Important: In Table 3-1 on page 43, addresses not listed are reserved. Table 3-1. Memory Mapa For details on registers, see page ... Start End Description Memory 0x0000.0000 0x0003.FFFF On-chip flash b 143 0x2000.0000 0x2000.FFFF Bit-banded on-chip SRAMc 143 0x2010.0000 0x21FF.FFFF Reserved non-bit-banded SRAM space - 0x2200.0000 0x23FF.FFFF Bit-band alias of 0x2000.0000 through 0x200F.FFFF 139 0x2400.0000 0x3FFF.FFFF Reserved non-bit-banded SRAM space - FiRM Peripherals 0x4000.0000 0x4000.0FFF Watchdog timer 242 0x4000.4000 0x4000.4FFF GPIO Port A 169 0x4000.5000 0x4000.5FFF GPIO Port B 169 0x4000.6000 0x4000.6FFF GPIO Port C 169 0x4000.7000 0x4000.7FFF GPIO Port D 169 0x4000.8000 0x4000.8FFF SSI0 348 0x4000.C000 0x4000.CFFF UART0 303 0x4000.D000 0x4000.DFFF UART1 303 0x4000.E000 0x4000.EFFF UART2 303 Peripherals 0x4002.0000 0x4002.07FF I2C Master 0 387 0x4002.0800 0x4002.0FFF I2C Slave 0 400 0x4002.4000 0x4002.4FFF GPIO Port E 169 0x4002.5000 0x4002.5FFF GPIO Port F 169 0x4002.6000 0x4002.6FFF GPIO Port G 169 0x4002.8000 0x4002.8FFF PWM 472 0x4002.C000 0x4002.CFFF QEI0 505 0x4003.0000 0x4003.0FFF Timer0 215 0x4003.1000 0x4003.1FFF Timer1 215 0x4003.2000 0x4003.2FFF Timer2 215 0x4003.8000 0x4003.8FFF ADC 269 0x4003.C000 0x4003.CFFF Analog Comparators 453 0x4004.8000 0x4004.8FFF Ethernet Controller 417 0x400F.C000 0x400F.CFFF Hibernation Module 126 November 30, 2007 43 Preliminary LM3S6952 Microcontroller For details on registers, see page ... Start End Description 0x400F.D000 0x400F.DFFF Flash control 143 0x400F.E000 0x400F.EFFF System control 66 0x4200.0000 0x43FF.FFFF Bit-banded alias of 0x4000.0000 through 0x400F.FFFF - Private Peripheral Bus ARM® Cortex™-M3 Technical Reference Manual 0xE000.0000 0xE000.0FFF Instrumentation Trace Macrocell (ITM) 0xE000.1000 0xE000.1FFF Data Watchpoint and Trace (DWT) 0xE000.2000 0xE000.2FFF Flash Patch and Breakpoint (FPB) 0xE000.3000 0xE000.DFFF Reserved 0xE000.E000 0xE000.EFFF Nested Vectored Interrupt Controller (NVIC) 0xE000.F000 0xE003.FFFF Reserved 0xE004.0000 0xE004.0FFF Trace Port Interface Unit (TPIU) 0xE004.1000 0xE004.1FFF Reserved - 0xE004.2000 0xE00F.FFFF Reserved - 0xE010.0000 0xFFFF.FFFF Reserved for vendor peripherals - a. All reserved space returns a bus fault when read or written. b. The unavailable flash will bus fault throughout this range. c. The unavailable SRAM will bus fault throughout this range. 44 November 30, 2007 Preliminary Memory Map 4 Interrupts The ARM Cortex-M3 processor and the Nested Vectored Interrupt Controller (NVIC) prioritize and handle all exceptions. All exceptions are handled in Handler Mode. The processor state is automatically stored to the stack on an exception, and automatically restored from the stack at the end of the Interrupt Service Routine (ISR). The vector is fetched in parallel to the state saving, which enables efficient interrupt entry. The processor supports tail-chaining, which enables back-to-back interrupts to be performed without the overhead of state saving and restoration. Table 4-1 on page 45 lists all the exceptions. Software can set eight priority levels on seven of these exceptions (system handlers) as well as on 34 interrupts (listed in Table 4-2 on page 46). Priorities on the system handlers are set with the NVIC System Handler Priority registers. Interrupts are enabled through the NVIC Interrupt Set Enable register and prioritized with the NVIC Interrupt Priority registers. You can also group priorities by splitting priority levels into pre-emption priorities and subpriorities. All the interrupt registers are described in Chapter 8, “Nested Vectored Interrupt Controller” in the ARM® Cortex™-M3 Technical Reference Manual. Internally, the highest user-settable priority (0) is treated as fourth priority, after a Reset, NMI, and a Hard Fault. Note that 0 is the default priority for all the settable priorities. If you assign the same priority level to two or more interrupts, their hardware priority (the lower the position number) determines the order in which the processor activates them. For example, if both GPIO Port A and GPIO Port B are priority level 1, then GPIO Port A has higher priority. See Chapter 5, “Exceptions” and Chapter 8, “Nested Vectored Interrupt Controller” in the ARM® Cortex™-M3 Technical Reference Manual for more information on exceptions and interrupts. Note: In Table 4-2 on page 46 interrupts not listed are reserved. Table 4-1. Exception Types Exception Type Position Prioritya Description - 0 - Stack top is loaded from first entry of vector table on reset. Invoked on power up and warm reset. On first instruction, drops to lowest priority (and then is called the base level of activation). This is asynchronous. Reset 1 -3 (highest) Cannot be stopped or preempted by any exception but reset. This is asynchronous. An NMI is only producible by software, using the NVIC Interrupt Control State register. Non-Maskable 2 -2 Interrupt (NMI) All classes of Fault, when the fault cannot activate due to priority or the configurable fault handler has been disabled. This is synchronous. Hard Fault 3 -1 MPU mismatch, including access violation and no match. This is synchronous. The priority of this exception can be changed. Memory Management 4 settable Pre-fetch fault, memory access fault, and other address/memory related faults. This is synchronous when precise and asynchronous when imprecise. You can enable or disable this fault. Bus Fault 5 settable Usage fault, such as undefined instruction executed or illegal state transition attempt. This is synchronous. Usage Fault 6 settable - 7-10 - Reserved. SVCall 11 settable System service call with SVC instruction. This is synchronous. November 30, 2007 45 Preliminary LM3S6952 Microcontroller Exception Type Position Prioritya Description Debug monitor (when not halting). This is synchronous, but only active when enabled. It does not activate if lower priority than the current activation. Debug Monitor 12 settable - 13 - Reserved. Pendable request for system service. This is asynchronous and only pended by software. PendSV 14 settable SysTick 15 settable System tick timer has fired. This is asynchronous. Asserted from outside the ARM Cortex-M3 core and fed through the NVIC (prioritized). These are all asynchronous. Table 4-2 on page 46 lists the interrupts on the LM3S6952 controller. 16 and settable above Interrupts a. 0 is the default priority for all the settable priorities. Table 4-2. Interrupts Interrupt (Bit in Interrupt Registers) Description 0 GPIO Port A 1 GPIO Port B 2 GPIO Port C 3 GPIO Port D 4 GPIO Port E 5 UART0 6 UART1 7 SSI0 8 I2C0 9 PWM Fault 10 PWM Generator 0 11 PWM Generator 1 13 QEI0 14 ADC Sequence 0 15 ADC Sequence 1 16 ADC Sequence 2 17 ADC Sequence 3 18 Watchdog timer 19 Timer0 A 20 Timer0 B 21 Timer1 A 22 Timer1 B 23 Timer2 A 24 Timer2 B 25 Analog Comparator 0 26 Analog Comparator 1 27 Analog Comparator 2 28 System Control 29 Flash Control 30 GPIO Port F 46 November 30, 2007 Preliminary Interrupts Interrupt (Bit in Interrupt Registers) Description 31 GPIO Port G 33 UART2 42 Ethernet Controller 43 Hibernation Module November 30, 2007 47 Preliminary LM3S6952 Microcontroller 5 JTAG Interface The Joint Test Action Group (JTAG) port is an IEEE standard that defines a Test Access Port and Boundary Scan Architecture for digital integrated circuits and provides a standardized serial interface for controlling the associated test logic. The TAP, Instruction Register (IR), and Data Registers (DR) can be used to test the interconnections of assembled printed circuit boards and obtain manufacturing information on the components. The JTAG Port also provides a means of accessing and controlling design-for-test features such as I/O pin observation and control, scan testing, and debugging. The JTAG port is comprised of the standard five pins: TRST, TCK, TMS, TDI, and TDO. Data is transmitted serially into the controller on TDI and out of the controller on TDO. The interpretation of this data is dependent on the current state of the TAP controller. For detailed information on the operation of the JTAG port and TAP controller, please refer to the IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture. The Luminary Micro JTAG controller works with the ARM JTAG controller built into the Cortex-M3 core. This is implemented by multiplexing the TDO outputs from both JTAG controllers. ARM JTAG instructions select the ARM TDO output while Luminary Micro JTAG instructions select the Luminary Micro TDO outputs. The multiplexer is controlled by the Luminary Micro JTAG controller, which has comprehensive programming for the ARM, Luminary Micro, and unimplemented JTAG instructions. The JTAG module has the following features: ■ IEEE 1149.1-1990 compatible Test Access Port (TAP) controller ■ Four-bit Instruction Register (IR) chain for storing JTAG instructions ■ IEEE standard instructions: – BYPASS instruction – IDCODE instruction – SAMPLE/PRELOAD instruction – EXTEST instruction – INTEST instruction ■ ARM additional instructions: – APACC instruction – DPACC instruction – ABORT instruction ■ Integrated ARM Serial Wire Debug (SWD) See the ARM® Cortex™-M3 Technical Reference Manual for more information on the ARM JTAG controller. 48 November 30, 2007 Preliminary JTAG Interface 5.1 Block Diagram Figure 5-1. JTAG Module Block Diagram Instruction Register (IR) TAP Controller BYPASS Data Register Boundary Scan Data Register IDCODE Data Register ABORT Data Register DPACC Data Register APACC Data Register TRST TCK TMS TDI TDO Cortex-M3 Debug Port 5.2 Functional Description A high-level conceptual drawing of the JTAG module is shown in Figure 5-1 on page 49. The JTAG module is composed of the Test Access Port (TAP) controller and serial shift chains with parallel update registers. The TAP controller is a simple state machine controlled by the TRST, TCK and TMS inputs. The current state of the TAP controller depends on the current value of TRST and the sequence of values captured on TMS at the rising edge of TCK. The TAP controller determines when the serial shift chains capture new data, shift data from TDI towards TDO, and update the parallel load registers. The current state of the TAP controller also determines whether the Instruction Register (IR) chain or one of the Data Register (DR) chains is being accessed. The serial shift chains with parallel load registers are comprised of a single Instruction Register (IR) chain and multiple Data Register (DR) chains. The current instruction loaded in the parallel load register determines which DR chain is captured, shifted, or updated during the sequencing of the TAP controller. Some instructions, like EXTEST and INTEST, operate on data currently in a DR chain and do not capture, shift, or update any of the chains. Instructions that are not implemented decode to the BYPASS instruction to ensure that the serial path between TDI and TDO is always connected (see Table 5-2 on page 55 for a list of implemented instructions). See “JTAG and Boundary Scan” on page 545 for JTAG timing diagrams. November 30, 2007 49 Preliminary LM3S6952 Microcontroller 5.2.1 JTAG Interface Pins The JTAG interface consists of five standard pins: TRST, TCK, TMS, TDI, and TDO. These pins and their associated reset state are given in Table 5-1 on page 50. Detailed information on each pin follows. Table 5-1. JTAG Port Pins Reset State Pin Name Data Direction Internal Pull-Up Internal Pull-Down Drive Strength Drive Value TRST Input Enabled Disabled N/A N/A TCK Input Enabled Disabled N/A N/A TMS Input Enabled Disabled N/A N/A TDI Input Enabled Disabled N/A N/A TDO Output Enabled Disabled 2-mA driver High-Z 5.2.1.1 Test Reset Input (TRST) The TRST pin is an asynchronous active Low input signal for initializing and resetting the JTAG TAP controller and associated JTAG circuitry. When TRST is asserted, the TAP controller resets to the Test-Logic-Reset state and remains there while TRST is asserted. When the TAP controller enters the Test-Logic-Reset state, the JTAG Instruction Register (IR) resets to the default instruction, IDCODE. By default, the internal pull-up resistor on the TRST pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port B should ensure that the internal pull-up resistor remains enabled on PB7/TRST; otherwise JTAG communication could be lost. 5.2.1.2 Test Clock Input (TCK) The TCK pin is the clock for the JTAG module. This clock is provided so the test logic can operate independently of any other system clocks. In addition, it ensures that multiple JTAG TAP controllers that are daisy-chained together can synchronously communicate serial test data between components. During normal operation, TCK is driven by a free-running clock with a nominal 50% duty cycle. When necessary, TCK can be stopped at 0 or 1 for extended periods of time. While TCK is stopped at 0 or 1, the state of the TAP controller does not change and data in the JTAG Instruction and Data Registers is not lost. By default, the internal pull-up resistor on the TCK pin is enabled after reset. This assures that no clocking occurs if the pin is not driven from an external source. The internal pull-up and pull-down resistors can be turned off to save internal power as long as the TCK pin is constantly being driven by an external source. 5.2.1.3 Test Mode Select (TMS) The TMS pin selects the next state of the JTAG TAP controller. TMS is sampled on the rising edge of TCK. Depending on the current TAP state and the sampled value of TMS, the next state is entered. Because the TMS pin is sampled on the rising edge of TCK, the IEEE Standard 1149.1 expects the value on TMS to change on the falling edge of TCK. Holding TMS high for five consecutive TCK cycles drives the TAP controller state machine to the Test-Logic-Reset state. When the TAP controller enters the Test-Logic-Reset state, the JTAG Instruction Register (IR) resets to the default instruction, IDCODE. Therefore, this sequence can be used as a reset mechanism, similar to asserting TRST. The JTAG Test Access Port state machine can be seen in its entirety in Figure 5-2 on page 52. 50 November 30, 2007 Preliminary JTAG Interface By default, the internal pull-up resistor on the TMS pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port C should ensure that the internal pull-up resistor remains enabled on PC1/TMS; otherwise JTAG communication could be lost. 5.2.1.4 Test Data Input (TDI) The TDI pin provides a stream of serial information to the IR chain and the DR chains. TDI is sampled on the rising edge of TCK and, depending on the current TAP state and the current instruction, presents this data to the proper shift register chain. Because the TDI pin is sampled on the rising edge of TCK, the IEEE Standard 1149.1 expects the value on TDI to change on the falling edge of TCK. By default, the internal pull-up resistor on the TDI pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port C should ensure that the internal pull-up resistor remains enabled on PC2/TDI; otherwise JTAG communication could be lost. 5.2.1.5 Test Data Output (TDO) The TDO pin provides an output stream of serial information from the IR chain or the DR chains. The value of TDO depends on the current TAP state, the current instruction, and the data in the chain being accessed. In order to save power when the JTAG port is not being used, the TDO pin is placed in an inactive drive state when not actively shifting out data. Because TDO can be connected to the TDI of another controller in a daisy-chain configuration, the IEEE Standard 1149.1 expects the value on TDO to change on the falling edge of TCK. By default, the internal pull-up resistor on the TDO pin is enabled after reset. This assures that the pin remains at a constant logic level when the JTAG port is not being used. The internal pull-up and pull-down resistors can be turned off to save internal power if a High-Z output value is acceptable during certain TAP controller states. 5.2.2 JTAG TAP Controller The JTAG TAP controller state machine is shown in Figure 5-2 on page 52. The TAP controller state machine is reset to the Test-Logic-Reset state on the assertion of a Power-On-Reset (POR) or the assertion of TRST. Asserting the correct sequence on the TMS pin allows the JTAG module to shift in new instructions, shift in data, or idle during extended testing sequences. For detailed information on the function of the TAP controller and the operations that occur in each state, please refer to IEEE Standard 1149.1. November 30, 2007 51 Preliminary LM3S6952 Microcontroller Figure 5-2. Test Access Port State Machine Test Logic Reset Run Test Idle Select DR Scan Select IR Scan Capture DR Capture IR Shift DR Shift IR Exit 1 DR Exit 1 IR Exit 2 DR Exit 2 IR Pause DR Pause IR Update DR Update IR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5.2.3 Shift Registers The Shift Registers consist of a serial shift register chain and a parallel load register. The serial shift register chain samples specific information during the TAP controller’s CAPTURE states and allows this information to be shifted out of TDO during the TAP controller’s SHIFT states. While the sampled data is being shifted out of the chain on TDO, new data is being shifted into the serial shift register on TDI. This new data is stored in the parallel load register during the TAP controller’s UPDATE states. Each of the shift registers is discussed in detail in “Register Descriptions” on page 55. 5.2.4 Operational Considerations There are certain operational considerations when using the JTAG module. Because the JTAG pins can be programmed to be GPIOs, board configuration and reset conditions on these pins must be considered. In addition, because the JTAG module has integrated ARM Serial Wire Debug, the method for switching between these two operational modes is described below. 52 November 30, 2007 Preliminary JTAG Interface 5.2.4.1 GPIO Functionality When the controller is reset with either a POR or RST, the JTAG/SWD port pins default to their JTAG/SWD configurations. The default configuration includes enabling digital functionality (setting GPIODEN to 1), enabling the pull-up resistors (setting GPIOPUR to 1), and enabling the alternate hardware function (setting GPIOAFSEL to 1) for the PB7 and PC[3:0] JTAG/SWD pins. It is possible for software to configure these pins as GPIOs after reset by writing 0s to PB7 and PC[3:0] in the GPIOAFSEL register. If the user does not require the JTAG/SWD port for debugging or board-level testing, this provides five more GPIOs for use in the design. Caution – If the JTAG pins are used as GPIOs in a design, PB7 and PC2 cannot have external pull-down resistors connected to both of them at the same time. If both pins are pulled Low during reset, the controller has unpredictable behavior. If this happens, remove one or both of the pull-down resistors, and apply RST or power-cycle the part. In addition, it is possible to create a software sequence that prevents the debugger from connecting to the Stellaris® microcontroller. If the program code loaded into flash immediately changes the JTAG pins to their GPIO functionality, the debugger may not have enough time to connect and halt the controller before the JTAG pin functionality switches. This may lock the debugger out of the part. This can be avoided with a software routine that restores JTAG functionality based on an external or software trigger. The commit control registers provide a layer of protection against accidental programming of critical hardware peripherals. Writes to protected bits of the GPIO Alternate Function Select (GPIOAFSEL) register (see page 179) are not committed to storage unless the GPIO Lock (GPIOLOCK) register (see page 189) has been unlocked and the appropriate bits of the GPIO Commit (GPIOCR) register (see page 190) have been set to 1. Recovering a "Locked" Device If software configures any of the JTAG/SWD pins as GPIO and loses the ability to communicate with the debugger, there is a debug sequence that can be used to recover the device. Performing a total of ten JTAG-to-SWD and SWD-to-JTAG switch sequences while holding the device in reset mass erases the flash memory. The sequence to recover the device is: 1. Assert and hold the RST signal. 2. Perform the JTAG-to-SWD switch sequence. 3. Perform the SWD-to-JTAG switch sequence. 4. Perform the JTAG-to-SWD switch sequence. 5. Perform the SWD-to-JTAG switch sequence. 6. Perform the JTAG-to-SWD switch sequence. 7. Perform the SWD-to-JTAG switch sequence. 8. Perform the JTAG-to-SWD switch sequence. 9. Perform the SWD-to-JTAG switch sequence. 10. Perform the JTAG-to-SWD switch sequence. 11. Perform the SWD-to-JTAG switch sequence. November 30, 2007 53 Preliminary LM3S6952 Microcontroller 12. Release the RST signal. The JTAG-to-SWD and SWD-to-JTAG switch sequences are described in “ARM Serial Wire Debug (SWD)” on page 54. When performing switch sequences for the purpose of recovering the debug capabilities of the device, only steps 1 and 2 of the switch sequence need to be performed. 5.2.4.2 ARM Serial Wire Debug (SWD) In order to seamlessly integrate the ARM Serial Wire Debug (SWD) functionality, a serial-wire debugger must be able to connect to the Cortex-M3 core without having to perform, or have any knowledge of, JTAG cycles. This is accomplished with a SWD preamble that is issued before the SWD session begins. The preamble used to enable the SWD interface of the SWJ-DP module starts with the TAP controller in the Test-Logic-Reset state. From here, the preamble sequences the TAP controller through the following states: Run Test Idle, Select DR, Select IR, Test Logic Reset, Test Logic Reset, Run Test Idle, Run Test Idle, Select DR, Select IR, Test Logic Reset, Test Logic Reset, Run Test Idle, Run Test Idle, Select DR, Select IR, and Test Logic Reset states. Stepping through this sequences of the TAP state machine enables the SWD interface and disables the JTAG interface. For more information on this operation and the SWD interface, see the ARM® Cortex™-M3 Technical Reference Manual and the ARM® CoreSight Technical Reference Manual. Because this sequence is a valid series of JTAG operations that could be issued, the ARM JTAG TAP controller is not fully compliant to the IEEE Standard 1149.1. This is the only instance where the ARM JTAG TAP controller does not meet full compliance with the specification. Due to the low probability of this sequence occurring during normal operation of the TAP controller, it should not affect normal performance of the JTAG interface. JTAG-to-SWD Switching To switch the operating mode of the Debug Access Port (DAP) from JTAG to SWD mode, the external debug hardware must send a switch sequence to the device. The 16-bit switch sequence for switching to SWD mode is defined as b1110011110011110, transmitted LSB first. This can also be represented as 16'hE79E when transmitted LSB first. The complete switch sequence should consist of the following transactions on the TCK/SWCLK and TMS/SWDIO signals: 1. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that both JTAG and SWD are in their reset/idle states. 2. Send the 16-bit JTAG-to-SWD switch sequence, 16'hE79E. 3. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that if SWJ-DP was already in SWD mode, before sending the switch sequence, the SWD goes into the line reset state. SWD-to-JTAG Switching To switch the operating mode of the Debug Access Port (DAP) from SWD to JTAG mode, the external debug hardware must send a switch sequence to the device. The 16-bit switch sequence for switching to JTAG mode is defined as b1110011110011110, transmitted LSB first. This can also be represented as 16'hE73C when transmitted LSB first. The complete switch sequence should consist of the following transactions on the TCK/SWCLK and TMS/SWDIO signals: 1. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that both JTAG and SWD are in their reset/idle states. 54 November 30, 2007 Preliminary JTAG Interface 2. Send the 16-bit SWD-to-JTAG switch sequence, 16'hE73C. 3. Send at least 5 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that if SWJ-DP was already in JTAG mode, before sending the switch sequence, the JTAG goes into the Test Logic Reset state. 5.3 Initialization and Configuration After a Power-On-Reset or an external reset (RST), the JTAG pins are automatically configured for JTAG communication. No user-defined initialization or configuration is needed. However, if the user application changes these pins to their GPIO function, they must be configured back to their JTAG functionality before JTAG communication can be restored. This is done by enabling the five JTAG pins (PB7 and PC[3:0]) for their alternate function using the GPIOAFSEL register. 5.4 Register Descriptions There are no APB-accessible registers in the JTAG TAP Controller or Shift Register chains. The registers within the JTAG controller are all accessed serially through the TAP Controller. The registers can be broken down into two main categories: Instruction Registers and Data Registers. 5.4.1 Instruction Register (IR) The JTAG TAP Instruction Register (IR) is a four-bit serial scan chain with a parallel load register connected between the JTAG TDI and TDO pins. When the TAP Controller is placed in the correct states, bits can be shifted into the Instruction Register. Once these bits have been shifted into the chain and updated, they are interpreted as the current instruction. The decode of the Instruction Register bits is shown in Table 5-2 on page 55. A detailed explanation of each instruction, along with its associated Data Register, follows. Table 5-2. JTAG Instruction Register Commands IR[3:0] Instruction Description Drives the values preloaded into the Boundary Scan Chain by the SAMPLE/PRELOAD instruction onto the pads. 0000 EXTEST Drives the values preloaded into the Boundary Scan Chain by the SAMPLE/PRELOAD instruction into the controller. 0001 INTEST Captures the current I/O values and shifts the sampled values out of the Boundary Scan Chain while new preload data is shifted in. 0010 SAMPLE / PRELOAD 1000 ABORT Shifts data into the ARM Debug Port Abort Register. 1010 DPACC Shifts data into and out of the ARM DP Access Register. 1011 APACC Shifts data into and out of the ARM AC Access Register. Loads manufacturing information defined by the IEEE Standard 1149.1 into the IDCODE chain and shifts it out. 1110 IDCODE 1111 BYPASS Connects TDI to TDO through a single Shift Register chain. All Others Reserved Defaults to the BYPASS instruction to ensure that TDI is always connected to TDO. 5.4.1.1 EXTEST Instruction The EXTEST instruction does not have an associated Data Register chain. The EXTEST instruction uses the data that has been preloaded into the Boundary Scan Data Register using the SAMPLE/PRELOAD instruction. When the EXTEST instruction is present in the Instruction Register, the preloaded data in the Boundary Scan Data Register associated with the outputs and output enables are used to drive the GPIO pads rather than the signals coming from the core. This allows November 30, 2007 55 Preliminary LM3S6952 Microcontroller tests to be developed that drive known values out of the controller, which can be used to verify connectivity. 5.4.1.2 INTEST Instruction The INTEST instruction does not have an associated Data Register chain. The INTEST instruction uses the data that has been preloaded into the Boundary Scan Data Register using the SAMPLE/PRELOAD instruction. When the INTEST instruction is present in the Instruction Register, the preloaded data in the Boundary Scan Data Register associated with the inputs are used to drive the signals going into the core rather than the signals coming from the GPIO pads. This allows tests to be developed that drive known values into the controller, which can be used for testing. It is important to note that although the RST input pin is on the Boundary Scan Data Register chain, it is only observable. 5.4.1.3 SAMPLE/PRELOAD Instruction The SAMPLE/PRELOAD instruction connects the Boundary Scan Data Register chain between TDI and TDO. This instruction samples the current state of the pad pins for observation and preloads new test data. Each GPIO pad has an associated input, output, and output enable signal. When the TAP controller enters the Capture DR state during this instruction, the input, output, and output-enable signals to each of the GPIO pads are captured. These samples are serially shifted out of TDO while the TAP controller is in the Shift DR state and can be used for observation or comparison in various tests. While these samples of the inputs, outputs, and output enables are being shifted out of the Boundary Scan Data Register, new data is being shifted into the Boundary Scan Data Register from TDI. Once the new data has been shifted into the Boundary Scan Data Register, the data is saved in the parallel load registers when the TAP controller enters the Update DR state. This update of the parallel load register preloads data into the Boundary Scan Data Register that is associated with each input, output, and output enable. This preloaded data can be used with the EXTEST and INTEST instructions to drive data into or out of the controller. Please see “Boundary Scan Data Register” on page 58 for more information. 5.4.1.4 ABORT Instruction The ABORT instruction connects the associated ABORT Data Register chain between TDI and TDO. This instruction provides read and write access to the ABORT Register of the ARM Debug Access Port (DAP). Shifting the proper data into this Data Register clears various error bits or initiates a DAP abort of a previous request. Please see the “ABORT Data Register” on page 58 for more information. 5.4.1.5 DPACC Instruction The DPACC instruction connects the associated DPACC Data Register chain between TDI and TDO. This instruction provides read and write access to the DPACC Register of the ARM Debug Access Port (DAP). Shifting the proper data into this register and reading the data output from this register allows read and write access to the ARM debug and status registers. Please see “DPACC Data Register” on page 58 for more information. 5.4.1.6 APACC Instruction The APACC instruction connects the associated APACC Data Register chain between TDI and TDO. This instruction provides read and write access to the APACC Register of the ARM Debug Access Port (DAP). Shifting the proper data into this register and reading the data output from this register allows read and write access to internal components and buses through the Debug Port. Please see “APACC Data Register” on page 58 for more information. 56 November 30, 2007 Preliminary JTAG Interface 5.4.1.7 IDCODE Instruction The IDCODE instruction connects the associated IDCODE Data Register chain between TDI and TDO. This instruction provides information on the manufacturer, part number, and version of the ARM core. This information can be used by testing equipment and debuggers to automatically configure their input and output data streams. IDCODE is the default instruction that is loaded into the JTAG Instruction Register when a power-on-reset (POR) is asserted, TRST is asserted, or the Test-Logic-Reset state is entered. Please see “IDCODE Data Register” on page 57 for more information. 5.4.1.8 BYPASS Instruction The BYPASS instruction connects the associated BYPASS Data Register chain between TDI and TDO. This instruction is used to create a minimum length serial path between the TDI and TDO ports. The BYPASS Data Register is a single-bit shift register. This instruction improves test efficiency by allowing components that are not needed for a specific test to be bypassed in the JTAG scan chain by loading them with the BYPASS instruction. Please see “BYPASS Data Register” on page 57 for more information. 5.4.2 Data Registers The JTAG module contains six Data Registers. These include: IDCODE, BYPASS, Boundary Scan, APACC, DPACC, and ABORT serial Data Register chains. Each of these Data Registers is discussed in the following sections. 5.4.2.1 IDCODE Data Register The format for the 32-bit IDCODE Data Register defined by the IEEE Standard 1149.1 is shown in Figure 5-3 on page 57. The standard requires that every JTAG-compliant device implement either the IDCODE instruction or the BYPASS instruction as the default instruction. The LSB of the IDCODE Data Register is defined to be a 1 to distinguish it from the BYPASS instruction, which has an LSB of 0. This allows auto configuration test tools to determine which instruction is the default instruction. The major uses of the JTAG port are for manufacturer testing of component assembly, and program development and debug. To facilitate the use of auto-configuration debug tools, the IDCODE instruction outputs a value of 0x3BA00477. This value indicates an ARM Cortex-M3, Version 1 processor. This allows the debuggers to automatically configure themselves to work correctly with the Cortex-M3 during debug. Figure 5-3. IDCODE Register Format 5.4.2.2 BYPASS Data Register The format for the 1-bit BYPASS Data Register defined by the IEEE Standard 1149.1 is shown in Figure 5-4 on page 58. The standard requires that every JTAG-compliant device implement either the BYPASS instruction or the IDCODE instruction as the default instruction. The LSB of the BYPASS Data Register is defined to be a 0 to distinguish it from the IDCODE instruction, which has an LSB of 1. This allows auto configuration test tools to determine which instruction is the default instruction. November 30, 2007 57 Preliminary LM3S6952 Microcontroller Figure 5-4. BYPASS Register Format 5.4.2.3 Boundary Scan Data Register The format of the Boundary Scan Data Register is shown in Figure 5-5 on page 58. Each GPIO pin, in a counter-clockwise direction from the JTAG port pins, is included in the Boundary Scan Data Register. Each GPIO pin has three associated digital signals that are included in the chain. These signals are input, output, and output enable, and are arranged in that order as can be seen in the figure. In addition to the GPIO pins, the controller reset pin, RST, is included in the chain. Because the reset pin is always an input, only the input signal is included in the Data Register chain. When the Boundary Scan Data Register is accessed with the SAMPLE/PRELOAD instruction, the input, output, and output enable from each digital pad are sampled and then shifted out of the chain to be verified. The sampling of these values occurs on the rising edge of TCK in the Capture DR state of the TAP controller. While the sampled data is being shifted out of the Boundary Scan chain in the Shift DR state of the TAP controller, new data can be preloaded into the chain for use with the EXTEST and INTEST instructions. These instructions either force data out of the controller, with the EXTEST instruction, or into the controller, with the INTEST instruction. Figure 5-5. Boundary Scan Register Format O TDO TDI O IN E UT O O IN U E T O O IN E UT O O IN U E T I N ... ... GPIO PB6 GPIO m RST GPIO m+1 GPIO n For detailed information on the order of the input, output, and output enable bits for each of the GPIO ports, please refer to the Stellaris® Family Boundary Scan Description Language (BSDL) files, downloadable from www.luminarymicro.com. 5.4.2.4 APACC Data Register The format for the 35-bit APACC Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 5.4.2.5 DPACC Data Register The format for the 35-bit DPACC Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 5.4.2.6 ABORT Data Register The format for the 35-bit ABORT Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 58 November 30, 2007 Preliminary JTAG Interface 6 System Control System control determines the overall operation of the device. It provides information about the device, controls the clocking to the core and individual peripherals, and handles reset detection and reporting. 6.1 Functional Description The System Control module provides the following capabilities: ■ Device identification, see “Device Identification” on page 59 ■ Local control, such as reset (see “Reset Control” on page 59), power (see “Power Control” on page 62) and clock control (see “Clock Control” on page 62) ■ System control (Run, Sleep, and Deep-Sleep modes), see “System Control” on page 64 6.1.1 Device Identification Seven read-only registers provide software with information on the microcontroller, such as version, part number, SRAM size, flash size, and other features. See the DID0, DID1, and DC0-DC4 registers. 6.1.2 Reset Control This section discusses aspects of hardware functions during reset as well as system software requirements following the reset sequence. 6.1.2.1 CMOD0 and CMOD1 Test-Mode Control Pins Two pins, CMOD0 and CMOD1, are defined for use by Luminary Micro for testing the devices during manufacture. They have no end-user function and should not be used. The CMOD pins should be connected to ground. 6.1.2.2 Reset Sources The controller has five sources of reset: 1. External reset input pin (RST) assertion, see “RST Pin Assertion” on page 59. 2. Power-on reset (POR), see “Power-On Reset (POR)” on page 60. 3. Internal brown-out (BOR) detector, see “Brown-Out Reset (BOR)” on page 60. 4. Software-initiated reset (with the software reset registers), see “Software Reset” on page 61. 5. A watchdog timer reset condition violation, see “Watchdog Timer Reset” on page 61. After a reset, the Reset Cause (RESC) register is set with the reset cause. The bits in this register are sticky and maintain their state across multiple reset sequences, except when an internal POR is the cause, and then all the other bits in the RESC register are cleared except for the POR indicator. 6.1.2.3 RST Pin Assertion The external reset pin (RST) resets the controller. This resets the core and all the peripherals except the JTAG TAP controller (see “JTAG Interface” on page 48). The external reset sequence is as follows: November 30, 2007 59 Preliminary LM3S6952 Microcontroller 1. The external reset pin (RST) is asserted and then de-asserted. 2. The internal reset is released and the core loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. A few clocks cycles from RST de-assertion to the start of the reset sequence is necessary for synchronization. The external reset timing is shown in Figure 23-11 on page 547. 6.1.2.4 Power-On Reset (POR) The Power-On Reset (POR) circuit monitors the power supply voltage (VDD). The POR circuit generates a reset signal to the internal logic when the power supply ramp reaches a threshold value (VTH). If the application only uses the POR circuit, the RST input needs to be connected to the power supply (VDD) through a pull-up resistor (1K to 10K Ω). The device must be operating within the specified operating parameters at the point when the on-chip power-on reset pulse is complete. The 3.3-V power supply to the device must reach 3.0 V within 10 msec of it crossing 2.0 V to guarantee proper operation. For applications that require the use of an external reset to hold the device in reset longer than the internal POR, the RST input may be used with the circuit as shown in Figure 6-1 on page 60. Figure 6-1. External Circuitry to Extend Reset R1 C1 R2 RST Stellaris D1 The R1 and C1 components define the power-on delay. The R2 resistor mitigates any leakage from the RST input. The diode (D1) discharges C1 rapidly when the power supply is turned off. The Power-On Reset sequence is as follows: 1. The controller waits for the later of external reset (RST) or internal POR to go inactive. 2. The internal reset is released and the core loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. The internal POR is only active on the initial power-up of the controller. The Power-On Reset timing is shown in Figure 23-12 on page 548. Note: The power-on reset also resets the JTAG controller. An external reset does not. 6.1.2.5 Brown-Out Reset (BOR) A drop in the input voltage resulting in the assertion of the internal brown-out detector can be used to reset the controller. This is initially disabled and may be enabled by software. The system provides a brown-out detection circuit that triggers if the power supply (VDD) drops below a brown-out threshold voltage (VBTH). If a brown-out condition is detected, the system may generate a controller interrupt or a system reset. 60 November 30, 2007 Preliminary System Control Brown-out resets are controlled with the Power-On and Brown-Out Reset Control (PBORCTL) register. The BORIOR bit in the PBORCTL register must be set for a brown-out condition to trigger a reset. The brown-out reset is equivelent to an assertion of the external RST input and the reset is held active until the proper VDD level is restored. The RESC register can be examined in the reset interrupt handler to determine if a Brown-Out condition was the cause of the reset, thus allowing software to determine what actions are required to recover. The internal Brown-Out Reset timing is shown in Figure 23-13 on page 548. 6.1.2.6 Software Reset Software can reset a specific peripheral or generate a reset to the entire system . Peripherals can be individually reset by software via three registers that control reset signals to each peripheral (see the SRCRn registers). If the bit position corresponding to a peripheral is set and subsequently cleared, the peripheral is reset. The encoding of the reset registers is consistent with the encoding of the clock gating control for peripherals and on-chip functions (see “System Control” on page 64). Note that all reset signals for all clocks of the specified unit are asserted as a result of a software-initiated reset. The entire system can be reset by software by setting the SYSRESETREQ bit in the Cortex-M3 Application Interrupt and Reset Control register resets the entire system including the core. The software-initiated system reset sequence is as follows: 1. A software system reset is initiated by writing the SYSRESETREQ bit in the ARM Cortex-M3 Application Interrupt and Reset Control register. 2. An internal reset is asserted. 3. The internal reset is deasserted and the controller loads from memory the initial stack pointer, the initial program counter, and the first instruction designated by the program counter, and then begins execution. The software-initiated system reset timing is shown in Figure 23-14 on page 548. 6.1.2.7 Watchdog Timer Reset The watchdog timer module's function is to prevent system hangs. The watchdog timer can be configured to generate an interrupt to the controller on its first time-out, and to generate a reset signal on its second time-out. After the first time-out event, the 32-bit counter is reloaded with the value of the Watchdog Timer Load (WDTLOAD) register, and the timer resumes counting down from that value. If the timer counts down to its zero state again before the first time-out interrupt is cleared, and the reset signal has been enabled, the watchdog timer asserts its reset signal to the system. The watchdog timer reset sequence is as follows: 1. The watchdog timer times out for the second time without being serviced. 2. An internal reset is asserted. 3. The internal reset is released and the controller loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. November 30, 2007 61 Preliminary LM3S6952 Microcontroller The watchdog reset timing is shown in Figure 23-15 on page 548. 6.1.3 Power Control The Stellaris® microcontroller provides an integrated LDO regulator that may be used to provide power to the majority of the controller's internal logic. The LDO regulator provides software a mechanism to adjust the regulated value, in small increments (VSTEP), over the range of 2.25 V to 2.75 V (inclusive)—or 2.5 V ± 10%. The adjustment is made by changing the value of the VADJ field in the LDO Power Control (LDOPCTL) register. Note: The use of the LDO is optional. The internal logic may be supplied by the on-chip LDO or by an external regulator. If the LDO is used, the LDO output pin is connected to the VDD25 pins on the printed circuit board. The LDO requires decoupling capacitors on the printed circuit board. If an external regulator is used, it is strongly recommended that the external regulator supply the controller only and not be shared with other devices on the printed circuit board. 6.1.4 Clock Control System control determines the control of clocks in this part. 6.1.4.1 Fundamental Clock Sources There are four clock sources for use in the device: ■ Internal Oscillator (IOSC): The internal oscillator is an on-chip clock source. It does not require the use of any external components. The frequency of the internal oscillator is 12 MHz ± 30%. Applications that do not depend on accurate clock sources may use this clock source to reduce system cost. The internal oscillator is the clock source the device uses during and following POR. If the main oscillator is required, software must enable the main oscillator following reset and allow the main oscillator to stabilize before changing the clock reference. ■ Main Oscillator: The main oscillator provides a frequency-accurate clock source by one of two means: an external single-ended clock source is connected to the OSC0 input pin, or an external crystal is connected across the OSC0 input and OSC1 output pins. The crystal value allowed depends on whether the main oscillator is used as the clock reference source to the PLL. If so, the crystal must be one of the supported frequencies between 3.579545 MHz through 8.192 MHz (inclusive). If the PLL is not being used, the crystal may be any one of the supported frequencies between 1 MHz and 8.192 MHz. The single-ended clock source range is from DC through the specified speed of the device. The supported crystals are listed in the XTAL bit in the RCC register (see page 75). ■ Internal 30-kHz Oscillator: The internal 30-kHz oscillator is similar to the internal oscillator, except that it provides an operational frequency of 30 kHz ± 30%. It is intended for use during Deep-Sleep power-saving modes. This power-savings mode benefits from reduced internal switching and also allows the main oscillator to be powered down. ■ External Real-Time Oscillator: The external real-time oscillator provides a low-frequency, accurate clock reference. It is intended to provide the system with a real-time clock source. The real-time oscillator is part of the Hibernation Module (“Hibernation Module” on page 120) and may also provide an accurate source of Deep-Sleep or Hibernate mode power savings. The internal system clock (sysclk), is derived from any of the four sources plus two others: the output of the internal PLL, and the internal oscillator divided by four (3 MHz ± 30%). The frequency of the PLL clock reference must be in the range of 3.579545 MHz to 8.192 MHz (inclusive). 62 November 30, 2007 Preliminary System Control The Run-Mode Clock Configuration (RCC) and Run-Mode Clock Configuration 2 (RCC2) registers provide control for the system clock. The RCC2 register is provided to extend fields that offer additional encodings over the RCC register. When used, the RCC2 register field values are used by the logic over the corresponding field in the RCC register. In particular, RCC2 provides for a larger assortment of clock configuration options. 6.1.4.2 Crystal Configuration for the Main Oscillator (MOSC) The main oscillator supports the use of a select number of crystals. If the main oscillator is used by the PLL as a reference clock, the supported range of crystals is 3.579545 to 8.192 MHz, otherwise, the range of supported crystals is 1 to 8.192 MHz. The XTAL bit in the RCC register (see page 75) describes the available crystal choices and default programming values. Software configures the RCC register XTAL field with the crystal number. If the PLL is used in the design, the XTAL field value is internally translated to the PLL settings. 6.1.4.3 PLL Frequency Configuration The PLL is disabled by default during power-on reset and is enabled later by software if required. Software configures the PLL input reference clock source, specifies the output divisor to set the system clock frequency, and enables the PLL to drive the output. If the main oscillator provides the clock reference to the PLL, the translation provided by hardware and used to program the PLL is available for software in the XTAL to PLL Translation (PLLCFG) register (see page 79). The internal translation provides a translation within ± 1% of the targeted PLL VCO frequency. The Crystal Value field (XTAL) on page 75 describes the available crystal choices and default programming of the PLLCFG register. The crystal number is written into the XTAL field of the Run-Mode Clock Configuration (RCC) register. Any time the XTAL field changes, the new settings are translated and the internal PLL settings are updated. 6.1.4.4 PLL Modes The PLL has two modes of operation: Normal and Power-Down ■ Normal: The PLL multiplies the input clock reference and drives the output. ■ Power-Down: Most of the PLL internal circuitry is disabled and the PLL does not drive the output. The modes are programmed using the RCC/RCC2 register fields (see page 75 and page 80). 6.1.4.5 PLL Operation If the PLL configuration is changed, the PLL output frequency is unstable until it reconverges (relocks) to the new setting. The time between the configuration change and relock is TREADY (see Table 23-6 on page 537). During this time, the PLL is not usable as a clock reference. The PLL is changed by one of the following: ■ Change to the XTAL value in the RCC register—writes of the same value do not cause a relock. ■ Change in the PLL from Power-Down to Normal mode. A counter is defined to measure the TREADY requirement. The counter is clocked by the main oscillator. The range of the main oscillator has been taken into account and the down counter is set November 30, 2007 63 Preliminary LM3S6952 Microcontroller to 0x1200 (that is, ~600 μs at an 8.192 MHz external oscillator clock). . Hardware is provided to keep the PLL from being used as a system clock until the TREADY condition is met after one of the two changes above. It is the user's responsibility to have a stable clock source (like the main oscillator) before the RCC/RCC2 register is switched to use the PLL. 6.1.5 System Control For power-savings purposes, the RCGCn , SCGCn , and DCGCn registers control the clock gating logic for each peripheral or block in the system while the controller is in Run, Sleep, and Deep-Sleep mode, respectively. In Run mode, the processor executes code. In Sleep mode, the clock frequency of the active peripherals is unchanged, but the processor is not clocked and therefore no longer executes code. In Deep-Sleep mode, the clock frequency of the active peripherals may change (depending on the Run mode clock configuration) in addition to the processor clock being stopped. An interrupt returns the device to Run mode from one of the sleep modes; the sleep modes are entered on request from the code. Each mode is described in more detail below. There are four levels of operation for the device defined as: ■ Run Mode. Run mode provides normal operation of the processor and all of the peripherals that are currently enabled by the RCGCn registers. The system clock can be any of the available clock sources including the PLL. ■ Sleep Mode. Sleep mode is entered by the Cortex-M3 core executing a WFI (Wait for Interrupt) instruction. Any properly configured interrupt event in the system will bring the processor back into Run mode. See the system control NVIC section of the ARM® Cortex™-M3 Technical Reference Manual for more details. In Sleep mode, the Cortex-M3 processor core and the memory subsystem are not clocked. Peripherals are clocked that are enabled in the SCGCn register when auto-clock gating is enabled (see the RCC register) or the RCGCn register when the auto-clock gating is disabled. The system clock has the same source and frequency as that during Run mode. ■ Deep-Sleep Mode. Deep-Sleep mode is entered by first writing the Deep Sleep Enable bit in the ARM Cortex-M3 NVIC system control register and then executing a WFI instruction. Any properly configured interrupt event in the system will bring the processor back into Run mode. See the system control NVIC section of the ARM® Cortex™-M3 Technical Reference Manual for more details. The Cortex-M3 processor core and the memory subsystem are not clocked. Peripherals are clocked that are enabled in the DCGCn register when auto-clock gating is enabled (see the RCC register) or the RCGCn register when auto-clock gating is disabled. The system clock source is the main oscillator by default or the internal oscillator specified in the DSLPCLKCFG register if one is enabled. When the DSLPCLKCFG register is used, the internal oscillator is powered up, if necessary, and the main oscillator is powered down. If the PLL is running at the time of the WFI instruction, hardware will power the PLL down and override the SYSDIV field of the active RCC/RCC2 register to be /16 or /64, respectively. When the Deep-Sleep exit event occurs, hardware brings the system clock back to the source and frequency it had at the onset of Deep-Sleep mode before enabling the clocks that had been stopped during the Deep-Sleep duration. ■ Hibernate Mode. In this mode, the power supplies are turned off to the main part of the device and only the Hibernation module's circuitry is active. An external wake event or RTC event is required to bring the device back to Run mode. The Cortex-M3 processor and peripherals outside 64 November 30, 2007 Preliminary System Control of the Hibernation module see a normal "power on" sequence and the processor starts running code. It can determine that it has been restarted from Hibernate mode by inspecting the Hibernation module registers. 6.2 Initialization and Configuration The PLL is configured using direct register writes to the RCC/RCC2 register. If the RCC2 register is being used, the USERCC2 bit must be set and the appropriate RCC2 bit/field is used. The steps required to successfully change the PLL-based system clock are: 1. Bypass the PLL and system clock divider by setting the BYPASS bit and clearing the USESYS bit in the RCC register. This configures the system to run off a “raw” clock source (using the main oscillator or internal oscillator) and allows for the new PLL configuration to be validated before switching the system clock to the PLL. 2. Select the crystal value (XTAL) and oscillator source (OSCSRC), and clear the PWRDN bit in RCC/RCC2. Setting the XTAL field automatically pulls valid PLL configuration data for the appropriate crystal, and clearing the PWRDN bit powers and enables the PLL and its output. 3. Select the desired system divider (SYSDIV) in RCC/RCC2 and set the USESYS bit in RCC. The SYSDIV field determines the system frequency for the microcontroller. 4. Wait for the PLL to lock by polling the PLLLRIS bit in the Raw Interrupt Status (RIS) register. 5. Enable use of the PLL by clearing the BYPASS bit in RCC/RCC2. 6.3 Register Map Table 6-1 on page 65 lists the System Control registers, grouped by function. The offset listed is a hexadecimal increment to the register’s address, relative to the System Control base address of 0x400F.E000. Note: Spaces in the System Control register space that are not used are reserved for future or internal use by Luminary Micro, Inc. Software should not modify any reserved memory address. Table 6-1. System Control Register Map See Offset Name Type Reset Description page 0x000 DID0 RO - Device Identification 0 67 0x004 DID1 RO - Device Identification 1 83 0x008 DC0 RO 0x00FF.007F Device Capabilities 0 85 0x010 DC1 RO 0x0011.32FF Device Capabilities 1 86 0x014 DC2 RO 0x0707.1117 Device Capabilities 2 88 0x018 DC3 RO 0x0F07.BFCF Device Capabilities 3 90 0x01C DC4 RO 0x5000.007F Device Capabilities 4 92 0x030 PBORCTL R/W 0x0000.7FFD Brown-Out Reset Control 69 0x034 LDOPCTL R/W 0x0000.0000 LDO Power Control 70 November 30, 2007 65 Preliminary LM3S6952 Microcontroller See Offset Name Type Reset Description page 0x040 SRCR0 R/W 0x00000000 Software Reset Control 0 115 0x044 SRCR1 R/W 0x00000000 Software Reset Control 1 116 0x048 SRCR2 R/W 0x00000000 Software Reset Control 2 118 0x050 RIS RO 0x0000.0000 Raw Interrupt Status 71 0x054 IMC R/W 0x0000.0000 Interrupt Mask Control 72 0x058 MISC R/W1C 0x0000.0000 Masked Interrupt Status and Clear 73 0x05C RESC R/W - Reset Cause 74 0x060 RCC R/W 0x07AE.3AD1 Run-Mode Clock Configuration 75 0x064 PLLCFG RO - XTAL to PLL Translation 79 0x070 RCC2 R/W 0x0780.2800 Run-Mode Clock Configuration 2 80 0x100 RCGC0 R/W 0x00000040 Run Mode Clock Gating Control Register 0 94 0x104 RCGC1 R/W 0x00000000 Run Mode Clock Gating Control Register 1 100 0x108 RCGC2 R/W 0x00000000 Run Mode Clock Gating Control Register 2 109 0x110 SCGC0 R/W 0x00000040 Sleep Mode Clock Gating Control Register 0 96 0x114 SCGC1 R/W 0x00000000 Sleep Mode Clock Gating Control Register 1 103 0x118 SCGC2 R/W 0x00000000 Sleep Mode Clock Gating Control Register 2 111 0x120 DCGC0 R/W 0x00000040 Deep Sleep Mode Clock Gating Control Register 0 98 0x124 DCGC1 R/W 0x00000000 Deep Sleep Mode Clock Gating Control Register 1 106 0x128 DCGC2 R/W 0x00000000 Deep Sleep Mode Clock Gating Control Register 2 113 0x144 DSLPCLKCFG R/W 0x0780.0000 Deep Sleep Clock Configuration 82 6.4 Register Descriptions All addresses given are relative to the System Control base address of 0x400F.E000. 66 November 30, 2007 Preliminary System Control Register 1: Device Identification 0 (DID0), offset 0x000 This register identifies the version of the device. Device Identification 0 (DID0) Base 0x400F.E000 Offset 0x000 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved VER reserved CLASS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MAJOR MINOR Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset - - - - - - - - - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 DID0 Version This field defines the DID0 register format version. The version number is numeric. The value of the VER field is encoded as follows: Value Description First revision of the DID0 register format, for Stellaris® Fury-class devices . 0x1 30:28 VER RO 0x1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:24 reserved RO 0x0 Device Class The CLASS field value identifies the internal design from which all mask sets are generated for all devices in a particular product line. The CLASS field value is changed for new product lines, for changes in fab process (for example, a remap or shrink), or any case where the MAJOR or MINOR fields require differentiation from prior devices. The value of the CLASS field is encoded as follows (all other encodings are reserved): Value Description 0x0 Stellaris® Sandstorm-class devices. 0x1 Stellaris® Fury-class devices. 23:16 CLASS RO 0x1 November 30, 2007 67 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Major Revision This field specifies the major revision number of the device. The major revision reflects changes to base layers of the design. The major revision number is indicated in the part number as a letter (A for first revision, B for second, and so on). This field is encoded as follows: Value Description 0x0 Revision A (initial device) 0x1 Revision B (first base layer revision) 0x2 Revision C (second base layer revision) and so on. 15:8 MAJOR RO - Minor Revision This field specifies the minor revision number of the device. The minor revision reflects changes to the metal layers of the design. The MINOR field value is reset when the MAJOR field is changed. This field is numeric and is encoded as follows: Value Description 0x0 Initial device, or a major revision update. 0x1 First metal layer change. 0x2 Second metal layer change. and so on. 7:0 MINOR RO - 68 November 30, 2007 Preliminary System Control Register 2: Brown-Out Reset Control (PBORCTL), offset 0x030 This register is responsible for controlling reset conditions after initial power-on reset. Brown-Out Reset Control (PBORCTL) Base 0x400F.E000 Offset 0x030 Type R/W, reset 0x0000.7FFD 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved BORIOR reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x0 BOR Interrupt or Reset This bit controls how a BOR event is signaled to the controller. If set, a reset is signaled. Otherwise, an interrupt is signaled. 1 BORIOR R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 November 30, 2007 69 Preliminary LM3S6952 Microcontroller Register 3: LDO Power Control (LDOPCTL), offset 0x034 The VADJ field in this register adjusts the on-chip output voltage (VOUT). LDO Power Control (LDOPCTL) Base 0x400F.E000 Offset 0x034 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved VADJ Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0 LDO Output Voltage This field sets the on-chip output voltage. The programming values for the VADJ field are provided below. Value VOUT (V) 0x00 2.50 0x01 2.45 0x02 2.40 0x03 2.35 0x04 2.30 0x05 2.25 0x06-0x3F Reserved 0x1B 2.75 0x1C 2.70 0x1D 2.65 0x1E 2.60 0x1F 2.55 5:0 VADJ R/W 0x0 70 November 30, 2007 Preliminary System Control Register 4: Raw Interrupt Status (RIS), offset 0x050 Central location for system control raw interrupts. These are set and cleared by hardware. Raw Interrupt Status (RIS) Base 0x400F.E000 Offset 0x050 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLRIS reserved BORRIS reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Raw Interrupt Status This bit is set when the PLL TREADY Timer asserts. 6 PLLLRIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 Brown-Out Reset Raw Interrupt Status This bit is the raw interrupt status for any brown-out conditions. If set, a brown-out condition is currently active. This is an unregistered signal from the brown-out detection circuit. An interrupt is reported if the BORIM bit in the IMC register is set and the BORIOR bit in the PBORCTL register is cleared. 1 BORRIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 November 30, 2007 71 Preliminary LM3S6952 Microcontroller Register 5: Interrupt Mask Control (IMC), offset 0x054 Central location for system control interrupt masks. Interrupt Mask Control (IMC) Base 0x400F.E000 Offset 0x054 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLIM reserved BORIM reserved Type RO RO RO RO RO RO RO RO RO R/W RO RO RO RO R/W RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Interrupt Mask This bit specifies whether a current limit detection is promoted to a controller interrupt. If set, an interrupt is generated if PLLLRIS in RIS is set; otherwise, an interrupt is not generated. 6 PLLLIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 Brown-Out Reset Interrupt Mask This bit specifies whether a brown-out condition is promoted to a controller interrupt. If set, an interrupt is generated if BORRIS is set; otherwise, an interrupt is not generated. 1 BORIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 72 November 30, 2007 Preliminary System Control Register 6: Masked Interrupt Status and Clear (MISC), offset 0x058 Central location for system control result of RIS AND IMC to generate an interrupt to the controller. All of the bits are R/W1C and this action also clears the corresponding raw interrupt bit in the RIS register (see page 71). Masked Interrupt Status and Clear (MISC) Base 0x400F.E000 Offset 0x058 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLMIS reserved BORMIS reserved Type RO RO RO RO RO RO RO RO RO R/W1C RO RO RO RO R/W1C RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Masked Interrupt Status This bit is set when the PLL TREADY timer asserts. The interrupt is cleared by writing a 1 to this bit. 6 PLLLMIS R/W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 BOR Masked Interrupt Status The BORMIS is simply the BORRIS ANDed with the mask value, BORIM. 1 BORMIS R/W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 November 30, 2007 73 Preliminary LM3S6952 Microcontroller Register 7: Reset Cause (RESC), offset 0x05C This register is set with the reset cause after reset. The bits in this register are sticky and maintain their state across multiple reset sequences, except when an external reset is the cause, and then all the other bits in the RESC register are cleared. Reset Cause (RESC) Base 0x400F.E000 Offset 0x05C Type R/W, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved LDO SW WDT BOR POR EXT Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0 LDO Reset When set, indicates the LDO circuit has lost regulation and has generated a reset event. 5 LDO R/W - Software Reset When set, indicates a software reset is the cause of the reset event. 4 SW R/W - Watchdog Timer Reset When set, indicates a watchdog reset is the cause of the reset event. 3 WDT R/W - Brown-Out Reset When set, indicates a brown-out reset is the cause of the reset event. 2 BOR R/W - Power-On Reset When set, indicates a power-on reset is the cause of the reset event. 1 POR R/W - External Reset When set, indicates an external reset (RST assertion) is the cause of the reset event. 0 EXT R/W - 74 November 30, 2007 Preliminary System Control Register 8: Run-Mode Clock Configuration (RCC), offset 0x060 This register is defined to provide source control and frequency speed. Run-Mode Clock Configuration (RCC) Base 0x400F.E000 Offset 0x060 Type R/W, reset 0x07AE.3AD1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved ACG SYSDIV USESYSDIV reserved USEPWMDIV PWMDIV reserved Type RO RO RO RO R/W R/W R/W R/W R/W R/W RO R/W R/W R/W R/W RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWRDN reserved BYPASS reserved XTAL OSCSRC reserved IOSCDIS MOSCDIS Type RO RO R/W RO R/W RO R/W R/W R/W R/W R/W R/W RO RO R/W R/W Reset 0 0 1 1 1 0 1 0 1 1 0 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:28 reserved RO 0x0 Auto Clock Gating This bit specifies whether the system uses the Sleep-Mode Clock Gating Control (SCGCn) registers and Deep-Sleep-Mode Clock Gating Control (DCGCn) registers if the controller enters a Sleep or Deep-Sleep mode (respectively). If set, the SCGCn or DCGCn registers are used to control the clocks distributed to the peripherals when the controller is in a sleep mode. Otherwise, the Run-Mode Clock Gating Control (RCGCn) registers are used when the controller enters a sleep mode. The RCGCn registers are always used to control the clocks in Run mode. This allows peripherals to consume less power when the controller is in a sleep mode and the peripheral is unused. 27 ACG R/W 0 November 30, 2007 75 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description System Clock Divisor Specifies which divisor is used to generate the system clock from the PLL output. The PLL VCO frequency is 400 MHz. Value Divisor (BYPASS=1) Frequency (BYPASS=0) 0x0 reserved reserved 0x1 /2 reserved 0x2 /3 reserved 0x3 /4 50 MHz 0x4 /5 40 MHz 0x5 /6 33.33 MHz 0x6 /7 28.57 MHz 0x7 /8 25 MHz 0x8 /9 22.22 MHz 0x9 /10 20 MHz 0xA /11 18.18 MHz 0xB /12 16.67 MHz 0xC /13 15.38 MHz 0xD /14 14.29 MHz 0xE /15 13.33 MHz 0xF /16 12.5 MHz (default) When reading the Run-Mode Clock Configuration (RCC) register (see page 75), the SYSDIV value is MINSYSDIV if a lower divider was requested and the PLL is being used. This lower value is allowed to divide a non-PLL source. 26:23 SYSDIV R/W 0xF Enable System Clock Divider Use the system clock divider as the source for the system clock. The system clock divider is forced to be used when the PLL is selected as the source. 22 USESYSDIV R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 21 reserved RO 0 Enable PWM Clock Divisor Use the PWM clock divider as the source for the PWM clock. 20 USEPWMDIV R/W 0 76 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description PWM Unit Clock Divisor This field specifies the binary divisor used to predivide the system clock down for use as the timing reference for the PWM module. This clock is only power 2 divide and rising edge is synchronous without phase shift from the system clock. Value Divisor 0x0 /2 0x1 /4 0x2 /8 0x3 /16 0x4 /32 0x5 /64 0x6 /64 0x7 /64 (default) 19:17 PWMDIV R/W 0x7 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 16:14 reserved RO 0 PLL Power Down This bit connects to the PLL PWRDN input. The reset value of 1 powers down the PLL. 13 PWRDN R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12 reserved RO 1 PLL Bypass Chooses whether the system clock is derived from the PLL output or the OSC source. If set, the clock that drives the system is the OSC source. Otherwise, the clock that drives the system is the PLL output clock divided by the system divider. Note: The ADC must be clocked from the PLL or directly from a 14-MHz to 18-MHz clock source to operate properly. While the ADC works in a 14-18 MHz range, to maintain a 1 M sample/second rate, the ADC must be provided a 16-MHz clock source. 11 BYPASS R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 10 reserved RO 0 November 30, 2007 77 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Crystal Value This field specifies the crystal value attached to the main oscillator. The encoding for this field is provided below. Crystal Frequency (MHz) Using the PLL Crystal Frequency (MHz) Not Using the PLL Value 0x0 1.000 reserved 0x1 1.8432 reserved 0x2 2.000 reserved 0x3 2.4576 reserved 0x4 3.579545 MHz 0x5 3.6864 MHz 0x6 4 MHz 0x7 4.096 MHz 0x8 4.9152 MHz 0x9 5 MHz 0xA 5.12 MHz 0xB 6 MHz (reset value) 0xC 6.144 MHz 0xD 7.3728 MHz 0xE 8 MHz 0xF 8.192 MHz 9:6 XTAL R/W 0xB Oscillator Source Picks among the four input sources for the OSC. The values are: Value Input Source 0x0 Main oscillator (default) 0x1 Internal oscillator (default) 0x2 Internal oscillator / 4 (this is necessary if used as input to PLL) 0x3 reserved 5:4 OSCSRC R/W 0x1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0x0 Internal Oscillator Disable 0: Internal oscillator (IOSC) is enabled. 1: Internal oscillator is disabled. 1 IOSCDIS R/W 0 Main Oscillator Disable 0: Main oscillator is enabled. 1: Main oscillator is disabled (default). 0 MOSCDIS R/W 1 78 November 30, 2007 Preliminary System Control Register 9: XTAL to PLL Translation (PLLCFG), offset 0x064 This register provides a means of translating external crystal frequencies into the appropriate PLL settings. This register is initialized during the reset sequence and updated anytime that the XTAL field changes in the Run-Mode Clock Configuration (RCC) register (see page 75). The PLL frequency is calculated using the PLLCFG field values, as follows: PLLFreq = OSCFreq * F / (R + 1) XTAL to PLL Translation (PLLCFG) Base 0x400F.E000 Offset 0x064 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved F R Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 - - - - - - - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:14 reserved RO 0x0 PLL F Value This field specifies the value supplied to the PLL’s F input. 13:5 F RO - PLL R Value This field specifies the value supplied to the PLL’s R input. 4:0 R RO - November 30, 2007 79 Preliminary LM3S6952 Microcontroller Register 10: Run-Mode Clock Configuration 2 (RCC2), offset 0x070 This register overrides the RCC equivalent register fields when the USERCC2 bit is set. This allows RCC2 to be used to extend the capabilities, while also providing a means to be backward-compatible to previous parts. The fields within the RCC2 register occupy the same bit positions as they do within the RCC register as LSB-justified. The SYSDIV2 field is wider so that additional larger divisors are possible. This allows a lower system clock frequency for improved Deep Sleep power consumption. Run-Mode Clock Configuration 2 (RCC2) Base 0x400F.E000 Offset 0x070 Type R/W, reset 0x0780.2800 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 USERCC2 reserved SYSDIV2 reserved Type R/W RO RO R/W R/W R/W R/W R/W R/W RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWRDN2 reserved BYPASS2 reserved OSCSRC2 reserved Type RO RO R/W RO R/W RO RO RO RO R/W R/W R/W RO RO RO RO Reset 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Use RCC2 When set, overrides the RCC register fields. 31 USERCC2 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 30:29 reserved RO 0x0 System Clock Divisor Specifies which divisor is used to generate the system clock from the PLL output. The PLL VCO frequency is 400 MHz. This field is wider than the RCC register SYSDIV field in order to provide additional divisor values. This permits the system clock to be run at much lower frequencies during Deep Sleep mode. For example, where the RCC register SYSDIV encoding of 1111 provides /16, the RCC2 register SYSDIV2 encoding of 111111 provides /64. 28:23 SYSDIV2 R/W 0x0F Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 22:14 reserved RO 0x0 Power-Down PLL When set, powers down the PLL. 13 PWRDN2 R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12 reserved RO 0 Bypass PLL When set, bypasses the PLL for the clock source. 11 BYPASS2 R/W 1 80 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 10:7 reserved RO 0x0 System Clock Source Value Description 0x0 Main oscillator (MOSC) 0x1 Internal oscillator (IOSC) 0x2 Internal oscillator / 4 0x3 30 kHz internal oscillator 0x7 32 kHz external oscillator 6:4 OSCSRC2 R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0 November 30, 2007 81 Preliminary LM3S6952 Microcontroller Register 11: Deep Sleep Clock Configuration (DSLPCLKCFG), offset 0x144 This register provides configuration information for the hardware control of Deep Sleep Mode. Deep Sleep Clock Configuration (DSLPCLKCFG) Base 0x400F.E000 Offset 0x144 Type R/W, reset 0x0780.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved DSDIVORIDE reserved Type RO RO RO R/W R/W R/W R/W R/W R/W RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DSOSCSRC reserved Type RO RO RO RO RO RO RO RO RO R/W R/W R/W RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:29 reserved RO 0x0 Divider Field Override 6-bit system divider field to override when Deep-Sleep occurs with PLL running. 28:23 DSDIVORIDE R/W 0x0F Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 22:7 reserved RO 0x0 Clock Source When set, forces IOSC to be clock source during Deep Sleep mode. Value Name Description 0x0 NOORIDE No override to the oscillator clock source is done 0x1 IOSC Use internal 12 MHz oscillator as source 0x3 30kHz Use 30 kHz internal oscillator 0x7 32kHz Use 32 kHz external oscillator 6:4 DSOSCSRC R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0x0 82 November 30, 2007 Preliminary System Control Register 12: Device Identification 1 (DID1), offset 0x004 This register identifies the device family, part number, temperature range, pin count, and package type. Device Identification 1 (DID1) Base 0x400F.E000 Offset 0x004 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 VER FAM PARTNO Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 0 0 1 1 1 1 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PINCOUNT reserved TEMP PKG ROHS QUAL Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 0 0 0 0 0 0 0 0 1 0 1 1 - - Bit/Field Name Type Reset Description DID1 Version This field defines the DID1 register format version. The version number is numeric. The value of the VER field is encoded as follows (all other encodings are reserved): Value Description First revision of the DID1 register format, indicating a Stellaris Fury-class device. 0x1 31:28 VER RO 0x1 Family This field provides the family identification of the device within the Luminary Micro product portfolio. The value is encoded as follows (all other encodings are reserved): Value Description Stellaris family of microcontollers, that is, all devices with external part numbers starting with LM3S. 0x0 27:24 FAM RO 0x0 Part Number This field provides the part number of the device within the family. The value is encoded as follows (all other encodings are reserved): Value Description 0x78 LM3S6952 23:16 PARTNO RO 0x78 Package Pin Count This field specifies the number of pins on the device package. The value is encoded as follows (all other encodings are reserved): Value Description 0x2 100-pin package 15:13 PINCOUNT RO 0x2 November 30, 2007 83 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12:8 reserved RO 0 Temperature Range This field specifies the temperature rating of the device. The value is encoded as follows (all other encodings are reserved): Value Description 0x1 Industrial temperature range (-40°C to 85°C) 7:5 TEMP RO 0x1 Package Type This field specifies the package type. The value is encoded as follows (all other encodings are reserved): Value Description 0x1 LQFP package 4:3 PKG RO 0x1 RoHS-Compliance This bit specifies whether the device is RoHS-compliant. A 1 indicates the part is RoHS-compliant. 2 ROHS RO 1 Qualification Status This field specifies the qualification status of the device. The value is encoded as follows (all other encodings are reserved): Value Description 0x0 Engineering Sample (unqualified) 0x1 Pilot Production (unqualified) 0x2 Fully Qualified 1:0 QUAL RO - 84 November 30, 2007 Preliminary System Control Register 13: Device Capabilities 0 (DC0), offset 0x008 This register is predefined by the part and can be used to verify features. Device Capabilities 0 (DC0) Base 0x400F.E000 Offset 0x008 Type RO, reset 0x00FF.007F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 SRAMSZ Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 FLASHSZ Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description SRAM Size Indicates the size of the on-chip SRAM memory. Value Description 0x00FF 64 KB of SRAM 31:16 SRAMSZ RO 0x00FF Flash Size Indicates the size of the on-chip flash memory. Value Description 0x007F 256 KB of Flash 15:0 FLASHSZ RO 0x007F November 30, 2007 85 Preliminary LM3S6952 Microcontroller Register 14: Device Capabilities 1 (DC1), offset 0x010 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: CANs, PWM, ADC, Watchdog timer, Hibernation module, and debug capabilities. This register also indicates the maximum clock frequency and maximum ADC sample rate. The format of this register is consistent with the RCGC0, SCGC0, and DCGC0 clock control registers and the SRCR0 software reset control register. Device Capabilities 1 (DC1) Base 0x400F.E000 Offset 0x010 Type RO, reset 0x0011.32FF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved PWM reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MINSYSDIV MAXADCSPD MPU HIB TEMPSNS PLL WDT SWO SWD JTAG Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 1 1 0 0 1 0 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:21 reserved RO 0 PWM Module Present When set, indicates that the PWM module is present. 20 PWM RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:17 reserved RO 0 ADC Module Present When set, indicates that the ADC module is present. 16 ADC RO 1 System Clock Divider Minimum 4-bit divider value for system clock. The reset value is hardware-dependent. See the RCC register for how to change the system clock divisor using the SYSDIV bit. Value Description 0x3 Specifies a 50-MHz CPU clock with a PLL divider of 4. 15:12 MINSYSDIV RO 0x3 Max ADC Speed Indicates the maximum rate at which the ADC samples data. Value Description 0x2 500K samples/second 11:8 MAXADCSPD RO 0x2 86 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description MPU Present When set, indicates that the Cortex-M3 Memory Protection Unit (MPU) module is present. See the ARM Cortex-M3 Technical Reference Manual for details on the MPU. 7 MPU RO 1 Hibernation Module Present When set, indicates that the Hibernation module is present. 6 HIB RO 1 Temp Sensor Present When set, indicates that the on-chip temperature sensor is present. 5 TEMPSNS RO 1 PLL Present When set, indicates that the on-chip Phase Locked Loop (PLL) is present. 4 PLL RO 1 Watchdog Timer Present When set, indicates that a watchdog timer is present. 3 WDT RO 1 SWO Trace Port Present When set, indicates that the Serial Wire Output (SWO) trace port is present. 2 SWO RO 1 SWD Present When set, indicates that the Serial Wire Debugger (SWD) is present. 1 SWD RO 1 JTAG Present When set, indicates that the JTAG debugger interface is present. 0 JTAG RO 1 November 30, 2007 87 Preliminary LM3S6952 Microcontroller Register 15: Device Capabilities 2 (DC2), offset 0x014 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Analog Comparators, General-Purpose Timers, I2Cs, QEIs, SSIs, and UARTs. The format of this register is consistent with the RCGC1, SCGC1, and DCGC1 clock control registers and the SRCR1 software reset control register. Device Capabilities 2 (DC2) Base 0x400F.E000 Offset 0x014 Type RO, reset 0x0707.1117 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 0 0 0 0 0 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved QEI0 reserved SSI0 reserved UART2 UART1 UART0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 1 0 0 0 1 0 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comparator 2 Present When set, indicates that analog comparator 2 is present. 26 COMP2 RO 1 Analog Comparator 1 Present When set, indicates that analog comparator 1 is present. 25 COMP1 RO 1 Analog Comparator 0 Present When set, indicates that analog comparator 0 is present. 24 COMP0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 Timer 2 Present When set, indicates that General-Purpose Timer module 2 is present. 18 TIMER2 RO 1 Timer 1 Present When set, indicates that General-Purpose Timer module 1 is present. 17 TIMER1 RO 1 Timer 0 Present When set, indicates that General-Purpose Timer module 0 is present. 16 TIMER0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 I2C Module 0 Present When set, indicates that I2C module 0 is present. 12 I2C0 RO 1 88 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0 QEI0 Present When set, indicates that QEI module 0 is present. 8 QEI0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:5 reserved RO 0 SSI0 Present When set, indicates that SSI module 0 is present. 4 SSI0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0 UART2 Present When set, indicates that UART module 2 is present. 2 UART2 RO 1 UART1 Present When set, indicates that UART module 1 is present. 1 UART1 RO 1 UART0 Present When set, indicates that UART module 0 is present. 0 UART0 RO 1 November 30, 2007 89 Preliminary LM3S6952 Microcontroller Register 16: Device Capabilities 3 (DC3), offset 0x018 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Analog Comparator I/Os, CCP I/Os, ADC I/Os, and PWM I/Os. Device Capabilities 3 (DC3) Base 0x400F.E000 Offset 0x018 Type RO, reset 0x0F07.BFCF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CCP3 CCP2 CCP1 CCP0 reserved ADC2 ADC1 ADC0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 1 1 1 1 0 0 0 0 0 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PWMFAULT reserved C2PLUS C2MINUS C1O C1PLUS C1MINUS C0O C0PLUS C0MINUS reserved PWM3 PWM2 PWM1 PWM0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 1 0 1 1 1 1 1 1 1 1 0 0 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:28 reserved RO 0 CCP3 Pin Present When set, indicates that Capture/Compare/PWM pin 3 is present. 27 CCP3 RO 1 CCP2 Pin Present When set, indicates that Capture/Compare/PWM pin 2 is present. 26 CCP2 RO 1 CCP1 Pin Present When set, indicates that Capture/Compare/PWM pin 1 is present. 25 CCP1 RO 1 CCP0 Pin Present When set, indicates that Capture/Compare/PWM pin 0 is present. 24 CCP0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 ADC2 Pin Present When set, indicates that ADC pin 2 is present. 18 ADC2 RO 1 ADC1 Pin Present When set, indicates that ADC pin 1 is present. 17 ADC1 RO 1 ADC0 Pin Present When set, indicates that ADC pin 0 is present. 16 ADC0 RO 1 PWM Fault Pin Present When set, indicates that the PWM Fault pin is present. 15 PWMFAULT RO 1 90 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 14 reserved RO 0 C2+ Pin Present When set, indicates that the analog comparator 2 (+) input pin is present. 13 C2PLUS RO 1 C2- Pin Present When set, indicates that the analog comparator 2 (-) input pin is present. 12 C2MINUS RO 1 C1o Pin Present When set, indicates that the analog comparator 1 output pin is present. 11 C1O RO 1 C1+ Pin Present When set, indicates that the analog comparator 1 (+) input pin is present. 10 C1PLUS RO 1 C1- Pin Present When set, indicates that the analog comparator 1 (-) input pin is present. 9 C1MINUS RO 1 C0o Pin Present When set, indicates that the analog comparator 0 output pin is present. 8 C0O RO 1 C0+ Pin Present When set, indicates that the analog comparator 0 (+) input pin is present. 7 C0PLUS RO 1 C0- Pin Present When set, indicates that the analog comparator 0 (-) input pin is present. 6 C0MINUS RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 PWM3 Pin Present When set, indicates that the PWM pin 3 is present. 3 PWM3 RO 1 PWM2 Pin Present When set, indicates that the PWM pin 2 is present. 2 PWM2 RO 1 PWM1 Pin Present When set, indicates that the PWM pin 1 is present. 1 PWM1 RO 1 PWM0 Pin Present When set, indicates that the PWM pin 0 is present. 0 PWM0 RO 1 November 30, 2007 91 Preliminary LM3S6952 Microcontroller Register 17: Device Capabilities 4 (DC4), offset 0x01C This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Ethernet MAC and PHY, GPIOs, and CCP I/Os. The format of this register is consistent with the RCGC2, SCGC2, and DCGC2 clock control registers and the SRCR2 software reset control register. Device Capabilities 4 (DC4) Base 0x400F.E000 Offset 0x01C Type RO, reset 0x5000.007F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 Ethernet PHY0 Present When set, indicates that Ethernet PHY module 0 is present. 30 EPHY0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 Ethernet MAC0 Present When set, indicates that Ethernet MAC module 0 is present. 28 EMAC0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:7 reserved RO 0 GPIO Port G Present When set, indicates that GPIO Port G is present. 6 GPIOG RO 1 GPIO Port F Present When set, indicates that GPIO Port F is present. 5 GPIOF RO 1 GPIO Port E Present When set, indicates that GPIO Port E is present. 4 GPIOE RO 1 GPIO Port D Present When set, indicates that GPIO Port D is present. 3 GPIOD RO 1 GPIO Port C Present When set, indicates that GPIO Port C is present. 2 GPIOC RO 1 92 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description GPIO Port B Present When set, indicates that GPIO Port B is present. 1 GPIOB RO 1 GPIO Port A Present When set, indicates that GPIO Port A is present. 0 GPIOA RO 1 November 30, 2007 93 Preliminary LM3S6952 Microcontroller Register 18: Run Mode Clock Gating Control Register 0 (RCGC0), offset 0x100 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Run Mode Clock Gating Control Register 0 (RCGC0) Base 0x400F.E000 Offset 0x100 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved PWM reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO R/W RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:21 reserved RO 0 PWM Clock Gating Control This bit controls the clock gating for the PWM module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 20 PWM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 94 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description ADC Sample Speed This field sets the rate at which the ADC samples data. You cannot set the rate higher than the maximum rate. You can set the sample rate by setting the MAXADCSPD bit as follows: Value Description 0x2 500K samples/second 0x1 250K samples/second 0x0 125K samples/second 11:8 MAXADCSPD R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 HIB Clock Gating Control This bit controls the clock gating for the Hibernation module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Clock Gating Control This bit controls the clock gating for the WDT module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 November 30, 2007 95 Preliminary LM3S6952 Microcontroller Register 19: Sleep Mode Clock Gating Control Register 0 (SCGC0), offset 0x110 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Sleep Mode Clock Gating Control Register 0 (SCGC0) Base 0x400F.E000 Offset 0x110 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved PWM reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO R/W RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:21 reserved RO 0 PWM Clock Gating Control This bit controls the clock gating for the PWM module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 20 PWM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 96 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description ADC Sample Speed This field sets the rate at which the ADC samples data. You cannot set the rate higher than the maximum rate. You can set the sample rate by setting the MAXADCSPD bit as follows: Value Description 0x2 500K samples/second 0x1 250K samples/second 0x0 125K samples/second 11:8 MAXADCSPD R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 HIB Clock Gating Control This bit controls the clock gating for the Hibernation module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Clock Gating Control This bit controls the clock gating for the WDT module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 November 30, 2007 97 Preliminary LM3S6952 Microcontroller Register 20: Deep Sleep Mode Clock Gating Control Register 0 (DCGC0), offset 0x120 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Deep Sleep Mode Clock Gating Control Register 0 (DCGC0) Base 0x400F.E000 Offset 0x120 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved PWM reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO R/W RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:21 reserved RO 0 PWM Clock Gating Control This bit controls the clock gating for the PWM module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 20 PWM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 98 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description ADC Sample Speed This field sets the rate at which the ADC samples data. You cannot set the rate higher than the maximum rate. You can set the sample rate by setting the MAXADCSPD bit as follows: Value Description 0x2 500K samples/second 0x1 250K samples/second 0x0 125K samples/second 11:8 MAXADCSPD R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 HIB Clock Gating Control This bit controls the clock gating for the Hibernation module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Clock Gating Control This bit controls the clock gating for the WDT module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 November 30, 2007 99 Preliminary LM3S6952 Microcontroller Register 21: Run Mode Clock Gating Control Register 1 (RCGC1), offset 0x104 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC1 is the clock configuration register for running operation, SCGC1 for Sleep operation, and DCGC1 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Run Mode Clock Gating Control Register 1 (RCGC1) Base 0x400F.E000 Offset 0x104 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO R/W R/W R/W RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved QEI0 reserved SSI0 reserved UART2 UART1 UART0 Type RO RO RO R/W RO RO RO R/W RO RO RO R/W RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comparator 2 Clock Gating This bit controls the clock gating for analog comparator 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 26 COMP2 R/W 0 Analog Comparator 1 Clock Gating This bit controls the clock gating for analog comparator 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 25 COMP1 R/W 0 Analog Comparator 0 Clock Gating This bit controls the clock gating for analog comparator 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 24 COMP0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 100 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Timer 2 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 18 TIMER2 R/W 0 Timer 1 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 17 TIMER1 R/W 0 Timer 0 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 16 TIMER0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 I2C0 Clock Gating Control This bit controls the clock gating for I2C module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 12 I2C0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0 QEI0 Clock Gating Control This bit controls the clock gating for QEI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 8 QEI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:5 reserved RO 0 SSI0 Clock Gating Control This bit controls the clock gating for SSI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 SSI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0 UART2 Clock Gating Control This bit controls the clock gating for UART module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 UART2 R/W 0 November 30, 2007 101 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART1 Clock Gating Control This bit controls the clock gating for UART module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 UART1 R/W 0 UART0 Clock Gating Control This bit controls the clock gating for UART module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 UART0 R/W 0 102 November 30, 2007 Preliminary System Control Register 22: Sleep Mode Clock Gating Control Register 1 (SCGC1), offset 0x114 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC1 is the clock configuration register for running operation, SCGC1 for Sleep operation, and DCGC1 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Sleep Mode Clock Gating Control Register 1 (SCGC1) Base 0x400F.E000 Offset 0x114 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO R/W R/W R/W RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved QEI0 reserved SSI0 reserved UART2 UART1 UART0 Type RO RO RO R/W RO RO RO R/W RO RO RO R/W RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comparator 2 Clock Gating This bit controls the clock gating for analog comparator 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 26 COMP2 R/W 0 Analog Comparator 1 Clock Gating This bit controls the clock gating for analog comparator 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 25 COMP1 R/W 0 Analog Comparator 0 Clock Gating This bit controls the clock gating for analog comparator 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 24 COMP0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 November 30, 2007 103 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Timer 2 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 18 TIMER2 R/W 0 Timer 1 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 17 TIMER1 R/W 0 Timer 0 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 16 TIMER0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 I2C0 Clock Gating Control This bit controls the clock gating for I2C module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 12 I2C0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0 QEI0 Clock Gating Control This bit controls the clock gating for QEI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 8 QEI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:5 reserved RO 0 SSI0 Clock Gating Control This bit controls the clock gating for SSI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 SSI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0 UART2 Clock Gating Control This bit controls the clock gating for UART module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 UART2 R/W 0 104 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description UART1 Clock Gating Control This bit controls the clock gating for UART module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 UART1 R/W 0 UART0 Clock Gating Control This bit controls the clock gating for UART module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 UART0 R/W 0 November 30, 2007 105 Preliminary LM3S6952 Microcontroller Register 23: Deep Sleep Mode Clock Gating Control Register 1 (DCGC1), offset 0x124 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC1 is the clock configuration register for running operation, SCGC1 for Sleep operation, and DCGC1 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Deep Sleep Mode Clock Gating Control Register 1 (DCGC1) Base 0x400F.E000 Offset 0x124 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO R/W R/W R/W RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved QEI0 reserved SSI0 reserved UART2 UART1 UART0 Type RO RO RO R/W RO RO RO R/W RO RO RO R/W RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comparator 2 Clock Gating This bit controls the clock gating for analog comparator 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 26 COMP2 R/W 0 Analog Comparator 1 Clock Gating This bit controls the clock gating for analog comparator 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 25 COMP1 R/W 0 Analog Comparator 0 Clock Gating This bit controls the clock gating for analog comparator 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 24 COMP0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 106 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Timer 2 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 18 TIMER2 R/W 0 Timer 1 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 17 TIMER1 R/W 0 Timer 0 Clock Gating Control This bit controls the clock gating for General-Purpose Timer module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 16 TIMER0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 I2C0 Clock Gating Control This bit controls the clock gating for I2C module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 12 I2C0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0 QEI0 Clock Gating Control This bit controls the clock gating for QEI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 8 QEI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:5 reserved RO 0 SSI0 Clock Gating Control This bit controls the clock gating for SSI module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 SSI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0 UART2 Clock Gating Control This bit controls the clock gating for UART module 2. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 UART2 R/W 0 November 30, 2007 107 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART1 Clock Gating Control This bit controls the clock gating for UART module 1. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 UART1 R/W 0 UART0 Clock Gating Control This bit controls the clock gating for UART module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 UART0 R/W 0 108 November 30, 2007 Preliminary System Control Register 24: Run Mode Clock Gating Control Register 2 (RCGC2), offset 0x108 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC2 is the clock configuration register for running operation, SCGC2 for Sleep operation, and DCGC2 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Run Mode Clock Gating Control Register 2 (RCGC2) Base 0x400F.E000 Offset 0x108 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved Type RO R/W RO R/W RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 PHY0 Clock Gating Control This bit controls the clock gating for Ethernet PHY unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 30 EPHY0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 MAC0 Clock Gating Control This bit controls the clock gating for Ethernet MAC unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 28 EMAC0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:7 reserved RO 0 Port G Clock Gating Control This bit controls the clock gating for Port G. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 6 GPIOG R/W 0 November 30, 2007 109 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Port F Clock Gating Control This bit controls the clock gating for Port F. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 5 GPIOF R/W 0 Port E Clock Gating Control This bit controls the clock gating for Port E. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 GPIOE R/W 0 Port D Clock Gating Control This bit controls the clock gating for Port D. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 3 GPIOD R/W 0 Port C Clock Gating Control This bit controls the clock gating for Port C. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 GPIOC R/W 0 Port B Clock Gating Control This bit controls the clock gating for Port B. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 GPIOB R/W 0 Port A Clock Gating Control This bit controls the clock gating for Port A. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 GPIOA R/W 0 110 November 30, 2007 Preliminary System Control Register 25: Sleep Mode Clock Gating Control Register 2 (SCGC2), offset 0x118 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC2 is the clock configuration register for running operation, SCGC2 for Sleep operation, and DCGC2 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Sleep Mode Clock Gating Control Register 2 (SCGC2) Base 0x400F.E000 Offset 0x118 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved Type RO R/W RO R/W RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 PHY0 Clock Gating Control This bit controls the clock gating for Ethernet PHY unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 30 EPHY0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 MAC0 Clock Gating Control This bit controls the clock gating for Ethernet MAC unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 28 EMAC0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:7 reserved RO 0 November 30, 2007 111 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Port G Clock Gating Control This bit controls the clock gating for Port G. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 6 GPIOG R/W 0 Port F Clock Gating Control This bit controls the clock gating for Port F. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 5 GPIOF R/W 0 Port E Clock Gating Control This bit controls the clock gating for Port E. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 GPIOE R/W 0 Port D Clock Gating Control This bit controls the clock gating for Port D. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 3 GPIOD R/W 0 Port C Clock Gating Control This bit controls the clock gating for Port C. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 GPIOC R/W 0 Port B Clock Gating Control This bit controls the clock gating for Port B. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 GPIOB R/W 0 Port A Clock Gating Control This bit controls the clock gating for Port A. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 GPIOA R/W 0 112 November 30, 2007 Preliminary System Control Register 26: Deep Sleep Mode Clock Gating Control Register 2 (DCGC2), offset 0x128 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC2 is the clock configuration register for running operation, SCGC2 for Sleep operation, and DCGC2 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Deep Sleep Mode Clock Gating Control Register 2 (DCGC2) Base 0x400F.E000 Offset 0x128 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved Type RO R/W RO R/W RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 PHY0 Clock Gating Control This bit controls the clock gating for Ethernet PHY unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 30 EPHY0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 MAC0 Clock Gating Control This bit controls the clock gating for Ethernet MAC unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 28 EMAC0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:7 reserved RO 0 November 30, 2007 113 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Port G Clock Gating Control This bit controls the clock gating for Port G. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 6 GPIOG R/W 0 Port F Clock Gating Control This bit controls the clock gating for Port F. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 5 GPIOF R/W 0 Port E Clock Gating Control This bit controls the clock gating for Port E. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 4 GPIOE R/W 0 Port D Clock Gating Control This bit controls the clock gating for Port D. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 3 GPIOD R/W 0 Port C Clock Gating Control This bit controls the clock gating for Port C. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 2 GPIOC R/W 0 Port B Clock Gating Control This bit controls the clock gating for Port B. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 1 GPIOB R/W 0 Port A Clock Gating Control This bit controls the clock gating for Port A. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, reads or writes to the unit will generate a bus fault. 0 GPIOA R/W 0 114 November 30, 2007 Preliminary System Control Register 27: Software Reset Control 0 (SRCR0), offset 0x040 Writes to this register are masked by the bits in the Device Capabilities 1 (DC1) register. Software Reset Control 0 (SRCR0) Base 0x400F.E000 Offset 0x040 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved PWM reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO R/W RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved HIB reserved WDT reserved Type RO RO RO RO RO RO RO RO RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:21 reserved RO 0 PWM Reset Control Reset control for PWM module. 20 PWM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:17 reserved RO 0 ADC0 Reset Control Reset control for SAR ADC module 0. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:7 reserved RO 0 HIB Reset Control Reset control for the Hibernation module. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Reset Control Reset control for Watchdog unit. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 November 30, 2007 115 Preliminary LM3S6952 Microcontroller Register 28: Software Reset Control 1 (SRCR1), offset 0x044 Writes to this register are masked by the bits in the Device Capabilities 2 (DC2) register. Software Reset Control 1 (SRCR1) Base 0x400F.E000 Offset 0x044 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO R/W R/W R/W RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved QEI0 reserved SSI0 reserved UART2 UART1 UART0 Type RO RO RO R/W RO RO RO R/W RO RO RO R/W RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comp 2 Reset Control Reset control for analog comparator 2. 26 COMP2 R/W 0 Analog Comp 1 Reset Control Reset control for analog comparator 1. 25 COMP1 R/W 0 Analog Comp 0 Reset Control Reset control for analog comparator 0. 24 COMP0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:19 reserved RO 0 Timer 2 Reset Control Reset control for General-Purpose Timer module 2. 18 TIMER2 R/W 0 Timer 1 Reset Control Reset control for General-Purpose Timer module 1. 17 TIMER1 R/W 0 Timer 0 Reset Control Reset control for General-Purpose Timer module 0. 16 TIMER0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 I2C0 Reset Control Reset control for I2C unit 0. 12 I2C0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0 116 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description QEI0 Reset Control Reset control for QEI unit 0. 8 QEI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:5 reserved RO 0 SSI0 Reset Control Reset control for SSI unit 0. 4 SSI0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0 UART2 Reset Control Reset control for UART unit 2. 2 UART2 R/W 0 UART1 Reset Control Reset control for UART unit 1. 1 UART1 R/W 0 UART0 Reset Control Reset control for UART unit 0. 0 UART0 R/W 0 November 30, 2007 117 Preliminary LM3S6952 Microcontroller Register 29: Software Reset Control 2 (SRCR2), offset 0x048 Writes to this register are masked by the bits in the Device Capabilities 4 (DC4) register. Software Reset Control 2 (SRCR2) Base 0x400F.E000 Offset 0x048 Type R/W, reset 0x00000000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved Type RO R/W RO R/W RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 PHY0 Reset Control Reset control for Ethernet PHY unit 0. 30 EPHY0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 MAC0 Reset Control Reset control for Ethernet MAC unit 0. 28 EMAC0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:7 reserved RO 0 Port G Reset Control Reset control for GPIO Port G. 6 GPIOG R/W 0 Port F Reset Control Reset control for GPIO Port F. 5 GPIOF R/W 0 Port E Reset Control Reset control for GPIO Port E. 4 GPIOE R/W 0 Port D Reset Control Reset control for GPIO Port D. 3 GPIOD R/W 0 Port C Reset Control Reset control for GPIO Port C. 2 GPIOC R/W 0 Port B Reset Control Reset control for GPIO Port B. 1 GPIOB R/W 0 118 November 30, 2007 Preliminary System Control Bit/Field Name Type Reset Description Port A Reset Control Reset control for GPIO Port A. 0 GPIOA R/W 0 November 30, 2007 119 Preliminary LM3S6952 Microcontroller 7 Hibernation Module The Hibernation Module manages removal and restoration of power to the rest of the microcontroller to provide a means for reducing power consumption. When the processor and peripherals are idle, power can be completely removed with only the Hibernation Module remaining powered. Power can be restored based on an external signal, or at a certain time using the built-in real-time clock (RTC). The Hibernation module can be independently supplied from a battery or an auxiliary power supply. The Hibernation module has the following features: ■ Power-switching logic to discrete external regulator ■ Dedicated pin for waking from an external signal ■ Low-battery detection, signaling, and interrupt generation ■ 32-bit real-time counter (RTC) ■ Two 32-bit RTC match registers for timed wake-up and interrupt generation ■ Clock source from a 32.768-kHz external oscillator or a 4.194304-MHz crystal ■ RTC predivider trim for making fine adjustments to the clock rate ■ 64 32-bit words of non-volatile memory ■ Programmable interrupts for RTC match, external wake, and low battery events 120 November 30, 2007 Preliminary Hibernation Module 7.1 Block Diagram Figure 7-1. Hibernation Module Block Diagram HIBIM HIBRIS HIBMIS HIBIC HIBRTCT Pre-Divider /128 XOSC0 XOSC1 HIBCTL.CLK32EN HIBCTL.CLKSEL HIBRTCC HIBRTCLD HIBRTCM0 HIBRTCM1 RTC Interrupts Power Sequence Logic MATCH0/1 WAKE Interrupts to CPU Low Battery Detect LOWBAT VDD VBAT HIB HIBCTL.LOWBATEN HIBCTL.PWRCUT HIBCTL.EXTWEN HIBCTL.RTCWEN HIBCTL.VABORT Non-Volatile Memory HIBDATA 7.2 Functional Description The Hibernation module controls the power to the processor with an enable signal (HIB) that signals an external voltage regulator to turn off. The Hibernation module power is determined dynamically. The supply voltage of the Hibernation module is the larger of the main voltage source (VDD) or the battery/auxilliary voltage source (VBAT). A voting circuit indicates the larger and an internal power switch selects the appropriate voltage source. The Hibernation module also has a separate clock source to maintain a real-time clock (RTC). Once in hibernation, the module signals an external voltage regulator to turn back on the power when an external pin (WAKE) is asserted, or when the internal RTC reaches a certain value. The Hibernation module can also detect when the battery voltage is low, and optionally prevent hibernation when this occurs. Power-up from a power cut to code execution is defined as the regulator turn-on time (specifed at tHIB_TO_VDD maximum) plus the normal chip POR (see “Hibernation Module” on page 543). 7.2.1 Register Access Timing Because the Hibernation module has an independent clocking domain, certain registers must be written only with a timing gap between accesses. The delay time is tHIB_REG_WRITE, therefore software must guarantee that a delay of tHIB_REG_WRITE is inserted between back-to-back writes to certain Hibernation registers, or between a write followed by a read to those same registers. There is no November 30, 2007 121 Preliminary LM3S6952 Microcontroller restriction on timing for back-to-back reads from the Hibernation module. Refer to “Register Descriptions” on page 126 for details about which registers are subject to this timing restriction. 7.2.2 Clock Source The Hibernation module must be clocked by an external source, even if the RTC feature will not be used. An external oscillator or crystal can be used for this purpose. To use a crystal, a 4.194304-MHz crystal is connected to the XOSC0 and XOSC1 pins. This clock signal is divided by 128 internally to produce the 32.768-kHz clock reference. To use a more precise clock source, a 32.768-kHz oscillator can be connected to the XOSC0 pin. The clock source is enabled by setting the CLK32EN bit of the HIBCTL register. The type of clock source is selected by setting the CLKSEL bit to 0 for a 4.194304-MHz clock source, and to 1 for a 32.768-kHz clock source. If the bit is set to 0, the input clock is divided by 128, resulting in a 32.768-kHz clock source. If a crystal is used for the clock source, the software must leave a delay of tXOSC_SETTLE after setting the CLK32EN bit and before any other accesses to the Hibernation module registers. The delay allows the crystal to power up and stabilize. If an oscillator is used for the clock source, no delay is needed. 7.2.3 Battery Management The Hibernation module can be independently powered by a battery or an auxiliary power source. The module can monitor the voltage level of the battery and detect when the voltage becomes too low. When this happens, an interrupt can be generated. The module can also be configured so that it will not go into Hibernate mode if the battery voltage is too low. Note that the Hibernation module draws power from whichever source (VBAT or VDD) has the higher voltage. Therefore, it is important to design the circuit to ensure that VDD is higher that VBAT under nominal conditions or else the Hibernation module draws power from the battery even when VDD is available. The Hibernation module can be configured to detect a low battery condition by setting the LOWBATEN bit of the HIBCTL register. In this configuration, the LOWBAT bit of the HIBRIS register will be set when the battery level is low. If the VABORT bit is also set, then the module is prevented from entering Hibernation mode when a low battery is detected. The module can also be configured to generate an interrupt for the low-battery condition (see “Interrupts and Status” on page 123). 7.2.4 Real-Time Clock The Hibernation module includes a 32-bit counter that increments once per second with a proper clock source and configuration (see “Clock Source” on page 122). The 32.768-kHz clock signal is fed into a predivider register which counts down the 32.768-kHz clock ticks to achieve a once per second clock rate for the RTC. The rate can be adjusted to compensate for inaccuracies in the clock source by using the predivider trim register. This register has a nominal value of 0x7FFF, and is used for one second out of every 64 seconds to divide the input clock. This allows the software to make fine corrections to the clock rate by adjusting the predivider trim register up or down from 0x7FFF. The predivider trim should be adjusted up from 0x7FFF in order to slow down the RTC rate, and down from 0x7FFF in order to speed up the RTC rate. The Hibernation module includes two 32-bit match registers that are compared to the value of the RTC counter. The match registers can be used to wake the processor from hibernation mode, or to generate an interrupt to the processor if it is not in hibernation. The RTC must be enabled with the RTCEN bit of the HIBCTL register. The value of the RTC can be set at any time by writing to the HIBRTCLD register. The predivider trim can be adjusted by reading and writing the HIBRTCT register. The predivider uses this register once every 64 seconds to adjust 122 November 30, 2007 Preliminary Hibernation Module the clock rate. The two match registers can be set by writing to the HIBRTCM0 and HIBRTCM1 registers. The RTC can be configured to generate interrupts by using the interrupt registers (see “Interrupts and Status” on page 123). 7.2.5 Non-Volatile Memory The Hibernation module contains 64 32-bit words of memory which are retained during hibernation. This memory is powered from the battery or auxiliary power supply during hibernation. The processor software can save state information in this memory prior to hibernation, and can then recover the state upon waking. The non-volatile memory can be accessed through the HIBDATA registers. 7.2.6 Power Control The Hibernation module controls power to the processor through the use of the HIB pin, which is intended to be connected to the enable signal of the external regulator(s) providing 3.3 V and/or 2.5 V to the microcontroller. When the HIB signal is asserted by the Hibernation module, the external regulator is turned off and no longer powers the microcontroller. The Hibernation module remains powered from the VBAT supply, which could be a battery or an auxiliary power source. Hibernation mode is initiated by the microcontroller setting the HIBREQ bit of the HIBCTL register. Prior to doing this, a wake-up condition must be configured, either from the external WAKE pin, or by using an RTC match. The Hibernation module is configured to wake from the external WAKE pin by setting the PINWEN bit of the HIBCTL register. It is configured to wake from RTC match by setting the RTCWEN bit. Either one or both of these bits can be set prior to going into hibernation. The WAKE pin includes a weak internal pull-up. Note that both the HIB and WAKE pins use the Hibernation module's internal power supply as the logic 1 reference. When the Hibernation module wakes, the microcontroller will see a normal power-on reset. It can detect that the power-on was due to a wake from hibernation by examining the raw interrupt status register (see “Interrupts and Status” on page 123) and by looking for state data in the non-volatile memory (see “Non-Volatile Memory” on page 123). When the HIB signal deasserts, enabling the external regulator, the external regulator must reach the operating voltage within tHIB_TO_VDD. 7.2.7 Interrupts and Status The Hibernation module can generate interrupts when the following conditions occur: ■ Assertion of WAKE pin ■ RTC match ■ Low battery detected All of the interrupts are ORed together before being sent to the interrupt controller, so the Hibernate module can only generate a single interrupt request to the controller at any given time. The software interrupt handler can service multiple interrupt events by reading the HIBMIS register. Software can also read the status of the Hibernation module at any time by reading the HIBRIS register which shows all of the pending events. This register can be used at power-on to see if a wake condition is pending, which indicates to the software that a hibernation wake occurred. The events that can trigger an interrupt are configured by setting the appropriate bits in the HIBIM register. Pending interrupts can be cleared by writing the corresponding bit in the HIBIC register. November 30, 2007 123 Preliminary LM3S6952 Microcontroller 7.3 Initialization and Configuration The Hibernation module can be configured in several different combinations. The following sections show the recommended programming sequence for various scenarios. The examples below assume that a 32.768-kHz oscillator is used, and thus always show bit 2 (CLKSEL) of the HIBCTL register set to 1. If a 4.194304-MHz crystal is used instead, then the CLKSEL bit remains cleared. Because the Hibernation module runs at 32 kHz and is asynchronous to the rest of the system, software must allow a delay of tHIB_REG_WRITE after writes to certain registers (see “Register Access Timing” on page 121). The registers that require a delay are denoted with a footnote in Table 7-1 on page 125. 7.3.1 Initialization The clock source must be enabled first, even if the RTC will not be used. If a 4.194304-MHz crystal is used, perform the following steps: 1. Write 0x40 to the HIBCTL register at offset 0x10 to enable the crystal and select the divide-by-128 input path. 2. Wait for a time of tXOSC_SETTLE for the crystal to power up and stabilize before performing any other operations with the Hibernation module. If a 32.678-kHz oscillator is used, then perform the following steps: 1. Write 0x44 to the HIBCTL register at offset 0x10 to enable the oscillator input. 2. No delay is necessary. The above is only necessary when the entire system is initialized for the first time. If the processor is powered due to a wake from hibernation, then the Hibernation module has already been powered up and the above steps are not necessary. The software can detect that the Hibernation module and clock are already powered by examining the CLK32EN bit of the HIBCTL register. 7.3.2 RTC Match Functionality (No Hibernation) The following steps are needed to use the RTC match functionality of the Hibernation module: 1. Write the required RTC match value to one of the HIBRTCMn registers at offset 0x004 or 0x008. 2. Write the required RTC load value to the HIBRTCLD register at offset 0x00C. 3. Set the required RTC match interrupt mask in the RTCALT0 and RTCALT1 bits (bits 1:0) in the HIBIM register at offset 0x014. 4. Write 0x0000.0041 to the HIBCTL register at offset 0x010 to enable the RTC to begin counting. 7.3.3 RTC Match/Wake-Up from Hibernation The following steps are needed to use the RTC match and wake-up functionality of the Hibernation module: 1. Write the required RTC match value to the HIBRTCMn registers at offset 0x004 or 0x008. 2. Write the required RTC load value to the HIBRTCLD register at offset 0x00C. 3. Write any data to be retained during power cut to the HIBDATA register at offsets 0x030-0x12C. 124 November 30, 2007 Preliminary Hibernation Module 4. Set the RTC Match Wake-Up and start the hibernation sequence by writing 0x0000.004F to the HIBCTL register at offset 0x010. 7.3.4 External Wake-Up from Hibernation The following steps are needed to use the Hibernation module with the external WAKE pin as the wake-up source for the microcontroller: 1. Write any data to be retained during power cut to the HIBDATA register at offsets 0x030-0x12C. 2. Enable the external wake and start the hibernation sequence by writing 0x0000.0056 to the HIBCTL register at offset 0x010. 7.3.5 RTC/External Wake-Up from Hibernation 1. Write the required RTC match value to the HIBRTCMn registers at offset 0x004 or 0x008. 2. Write the required RTC load value to the HIBRTCLD register at offset 0x00C. 3. Write any data to be retained during power cut to the HIBDATA register at offsets 0x030-0x12C. 4. Set the RTC Match/External Wake-Up and start the hibernation sequence by writing 0x0000.005F to the HIBCTL register at offset 0x010. 7.4 Register Map Table 7-1 on page 125 lists the Hibernation registers. All addresses given are relative to the Hibernation Module base address at 0x400F.C000. Note: HIBRTCC, HIBRTCM0, HIBRTCM1, HIBRTCLD, HIBRTCT, and HIBDATA are on the Hibernation module clock domain and require a delay of tHIB_REG_WRITE between write accesses. See “Register Access Timing” on page 121. Table 7-1. Hibernation Module Register Map See Offset Name Type Reset Description page 0x000 HIBRTCC RO 0x0000.0000 Hibernation RTC Counter 127 0x004 HIBRTCM0 R/W 0xFFFF.FFFF Hibernation RTC Match 0 128 0x008 HIBRTCM1 R/W 0xFFFF.FFFF Hibernation RTC Match 1 129 0x00C HIBRTCLD R/W 0xFFFF.FFFF Hibernation RTC Load 130 0x010 HIBCTL R/W 0x0000.0000 Hibernation Control 131 0x014 HIBIM R/W 0x0000.0000 Hibernation Interrupt Mask 133 0x018 HIBRIS RO 0x0000.0000 Hibernation Raw Interrupt Status 134 0x01C HIBMIS RO 0x0000.0000 Hibernation Masked Interrupt Status 135 0x020 HIBIC R/W1C 0x0000.0000 Hibernation Interrupt Clear 136 0x024 HIBRTCT R/W 0x0000.7FFF Hibernation RTC Trim 137 0x030- HIBDATA R/W 0x0000.0000 Hibernation Data 138 0x12C November 30, 2007 125 Preliminary LM3S6952 Microcontroller 7.5 Register Descriptions The remainder of this section lists and describes the Hibernation module registers, in numerical order by address offset. 126 November 30, 2007 Preliminary Hibernation Module Register 1: Hibernation RTC Counter (HIBRTCC), offset 0x000 This register is the current 32-bit value of the RTC counter. Hibernation RTC Counter (HIBRTCC) Base 0x400F.C000 Offset 0x000 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RTCC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RTCC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description RTC Counter A read returns the 32-bit counter value. This register is read-only. To change the value, use the HIBRTCLD register. 31:0 RTCC RO 0x0000.0000 November 30, 2007 127 Preliminary LM3S6952 Microcontroller Register 2: Hibernation RTC Match 0 (HIBRTCM0), offset 0x004 This register is the 32-bit match 0 register for the RTC counter. Hibernation RTC Match 0 (HIBRTCM0) Base 0x400F.C000 Offset 0x004 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RTCM0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RTCM0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description RTC Match 0 A write loads the value into the RTC match register. A read returns the current match value. 31:0 RTCM0 R/W 0xFFFF.FFFF 128 November 30, 2007 Preliminary Hibernation Module Register 3: Hibernation RTC Match 1 (HIBRTCM1), offset 0x008 This register is the 32-bit match 1 register for the RTC counter. Hibernation RTC Match 1 (HIBRTCM1) Base 0x400F.C000 Offset 0x008 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RTCM1 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RTCM1 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description RTC Match 1 A write loads the value into the RTC match register. A read returns the current match value. 31:0 RTCM1 R/W 0xFFFF.FFFF November 30, 2007 129 Preliminary LM3S6952 Microcontroller Register 4: Hibernation RTC Load (HIBRTCLD), offset 0x00C This register is the 32-bit value loaded into the RTC counter. Hibernation RTC Load (HIBRTCLD) Base 0x400F.C000 Offset 0x00C Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RTCLD Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RTCLD Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description RTC Load A write loads the current value into the RTC counter (RTCC). A read returns the 32-bit load value. 31:0 RTCLD R/W 0xFFFF.FFFF 130 November 30, 2007 Preliminary Hibernation Module Register 5: Hibernation Control (HIBCTL), offset 0x010 This register is the control register for the Hibernation module. Hibernation Control (HIBCTL) Base 0x400F.C000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved VABORT CLK32EN LOWBATEN PINWEN RTCWEN CLKSEL HIBREQ RTCEN Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Power Cut Abort Enable 0: Power cut occurs during a low-battery alert 1: Power cut is aborted 7 VABORT R/W 0 32-kHz Oscillator Enable 0: Disabled 1: Enabled This bit must be enabled to use the Hibernation module. If a crystal is used, then software should wait 20 ms after setting this bit to allow the crystal to power up and stabilize. 6 CLK32EN R/W 0 Low Battery Monitoring Enable 0: Disabled 1: Enabled When set, low battery voltage detection is enabled. 5 LOWBATEN R/W 0 External WAKE Pin Enable 0: Disabled 1: Enabled When set, an external event on the WAKE pin will re-power the device. 4 PINWEN R/W 0 RTC Wake-up Enable 0: Disabled 1: Enabled When set, an RTC match event (RTCM0 or RTCM1) will re-power the device based on the RTC counter value matching the corresponding match register 0 or 1. 3 RTCWEN R/W 0 November 30, 2007 131 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Hibernation Module Clock Select 0: Use Divide by 128 output. Use this value for a 4-MHz crystal. 1: Use raw output. Use this value for a 32-kHz oscillator. 2 CLKSEL R/W 0 Hibernation Request 0: Disabled 1: Hibernation initiated After a wake-up event, this bit is cleared by hardware. 1 HIBREQ R/W 0 RTC Timer Enable 0: Disabled 1: Enabled 0 RTCEN R/W 0 132 November 30, 2007 Preliminary Hibernation Module Register 6: Hibernation Interrupt Mask (HIBIM), offset 0x014 This register is the interrupt mask register for the Hibernation module interrupt sources. Hibernation Interrupt Mask (HIBIM) Base 0x400F.C000 Offset 0x014 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved EXTW LOWBAT RTCALT1 RTCALT0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x000.0000 External Wake-Up Interrupt Mask 0: Masked 1: Unmasked 3 EXTW R/W 0 Low Battery Voltage Interrupt Mask 0: Masked 1: Unmasked 2 LOWBAT R/W 0 RTC Alert1 Interrupt Mask 0: Masked 1: Unmasked 1 RTCALT1 R/W 0 RTC Alert0 Interrupt Mask 0: Masked 1: Unmasked 0 RTCALT0 R/W 0 November 30, 2007 133 Preliminary LM3S6952 Microcontroller Register 7: Hibernation Raw Interrupt Status (HIBRIS), offset 0x018 This register is the raw interrupt status for the Hibernation module interrupt sources. Hibernation Raw Interrupt Status (HIBRIS) Base 0x400F.C000 Offset 0x018 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved EXTW LOWBAT RTCALT1 RTCALT0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x000.0000 3 EXTW RO 0 External Wake-Up Raw Interrupt Status 2 LOWBAT RO 0 Low Battery Voltage Raw Interrupt Status 1 RTCALT1 RO 0 RTC Alert1 Raw Interrupt Status 0 RTCALT0 RO 0 RTC Alert0 Raw Interrupt Status 134 November 30, 2007 Preliminary Hibernation Module Register 8: Hibernation Masked Interrupt Status (HIBMIS), offset 0x01C This register is the masked interrupt status for the Hibernation module interrupt sources. Hibernation Masked Interrupt Status (HIBMIS) Base 0x400F.C000 Offset 0x01C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved EXTW LOWBAT RTCALT1 RTCALT0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x000.0000 3 EXTW RO 0 External Wake-Up Masked Interrupt Status 2 LOWBAT RO 0 Low Battery Voltage Masked Interrupt Status 1 RTCALT1 RO 0 RTC Alert1 Masked Interrupt Status 0 RTCALT0 RO 0 RTC Alert0 Masked Interrupt Status November 30, 2007 135 Preliminary LM3S6952 Microcontroller Register 9: Hibernation Interrupt Clear (HIBIC), offset 0x020 This register is the interrupt write-one-to-clear register for the Hibernation module interrupt sources. Hibernation Interrupt Clear (HIBIC) Base 0x400F.C000 Offset 0x020 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved EXTW LOWBAT RTCALT1 RTCALT0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x000.0000 External Wake-Up Masked Interrupt Clear Reads return an indeterminate value. 3 EXTW R/W1C 0 Low Battery Voltage Masked Interrupt Clear Reads return an indeterminate value. 2 LOWBAT R/W1C 0 RTC Alert1 Masked Interrupt Clear Reads return an indeterminate value. 1 RTCALT1 R/W1C 0 RTC Alert0 Masked Interrupt Clear Reads return an indeterminate value. 0 RTCALT0 R/W1C 0 136 November 30, 2007 Preliminary Hibernation Module Register 10: Hibernation RTC Trim (HIBRTCT), offset 0x024 This register contains the value that is used to trim the RTC clock predivider. It represents the computed underflow value that is used during the trim cycle. It is represented as 0x7FFF ± N clock cycles. Hibernation RTC Trim (HIBRTCT) Base 0x400F.C000 Offset 0x024 Type R/W, reset 0x0000.7FFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TRIM Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0000 RTC Trim Value This value is loaded into the RTC predivider every 64 seconds. It is used to adjust the RTC rate to account for drift and inaccuracy in the clock source. The compensation is made by software by adjusting the default value of 0x7FFF up or down. 15:0 TRIM R/W 0x7FFF November 30, 2007 137 Preliminary LM3S6952 Microcontroller Register 11: Hibernation Data (HIBDATA), offset 0x030-0x12C This address space is implemented as a 64x32-bit memory (256 bytes). It can be loaded by the system processor in order to store any non-volatile state data and will not lose power during a power cut operation. Hibernation Data (HIBDATA) Base 0x400F.C000 Offset 0x030-0x12C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RTD Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RTD Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description 31:0 RTD R/W 0x0000.0000 Hibernation Module NV Registers[63:0] 138 November 30, 2007 Preliminary Hibernation Module 8 Internal Memory The LM3S6952 microcontroller comes with 64 KB of bit-banded SRAM and 256 KB of flash memory. The flash controller provides a user-friendly interface, making flash programming a simple task. Flash protection can be applied to the flash memory on a 2-KB block basis. 8.1 Block Diagram Figure 8-1. Flash Block Diagram Flash Control FMA FCMISC FCIM FCRIS FMC FMD Flash Timing USECRL Flash Protection FMPREn FMPPEn Flash Array SRAM Array Bridge Cortex-M3 ICode DCode System Bus APB User Registers USER_REG0 USER_REG1 USER_DBG 8.2 Functional Description This section describes the functionality of both the flash and SRAM memories. 8.2.1 SRAM Memory The internal SRAM of the Stellaris® devices is located at address 0x2000.0000 of the device memory map. To reduce the number of time consuming read-modify-write (RMW) operations, ARM has introduced bit-banding technology in the Cortex-M3 processor. With a bit-band-enabled processor, certain regions in the memory map (SRAM and peripheral space) can use address aliases to access individual bits in a single, atomic operation. The bit-band alias is calculated by using the formula: November 30, 2007 139 Preliminary LM3S6952 Microcontroller bit-band alias = bit-band base + (byte offset * 32) + (bit number * 4) For example, if bit 3 at address 0x2000.1000 is to be modified, the bit-band alias is calculated as: 0x2200.0000 + (0x1000 * 32) + (3 * 4) = 0x2202.000C With the alias address calculated, an instruction performing a read/write to address 0x2202.000C allows direct access to only bit 3 of the byte at address 0x2000.1000. For details about bit-banding, please refer to Chapter 4, “Memory Map” in the ARM® Cortex™-M3 Technical Reference Manual. 8.2.2 Flash Memory The flash is organized as a set of 1-KB blocks that can be individually erased. Erasing a block causes the entire contents of the block to be reset to all 1s. An individual 32-bit word can be programmed to change bits that are currently 1 to a 0. These blocks are paired into a set of 2-KB blocks that can be individually protected. The protection allows blocks to be marked as read-only or execute-only, providing different levels of code protection. Read-only blocks cannot be erased or programmed, protecting the contents of those blocks from being modified. Execute-only blocks cannot be erased or programmed, and can only be read by the controller instruction fetch mechanism, protecting the contents of those blocks from being read by either the controller or by a debugger. See also “Serial Flash Loader” on page 551 for a preprogrammed flash-resident utility used to download code to the flash memory of a device without the use of a debug interface. 8.2.2.1 Flash Memory Timing The timing for the flash is automatically handled by the flash controller. However, in order to do so, it must know the clock rate of the system in order to time its internal signals properly. The number of clock cycles per microsecond must be provided to the flash controller for it to accomplish this timing. It is software's responsibility to keep the flash controller updated with this information via the USec Reload (USECRL) register. On reset, the USECRL register is loaded with a value that configures the flash timing so that it works with the maximum clock rate of the part. If software changes the system operating frequency, the new operating frequency minus 1 (in MHz) must be loaded into USECRL before any flash modifications are attempted. For example, if the device is operating at a speed of 20 MHz, a value of 0x13 (20-1) must be written to the USECRL register. 8.2.2.2 Flash Memory Protection The user is provided two forms of flash protection per 2-KB flash blocks in four pairs of 32-bit wide registers. The protection policy for each form is controlled by individual bits (per policy per block) in the FMPPEn and FMPREn registers. ■ Flash Memory Protection Program Enable (FMPPEn): If set, the block may be programmed (written) or erased. If cleared, the block may not be changed. ■ Flash Memory Protection Read Enable (FMPREn): If set, the block may be executed or read by software or debuggers. If cleared, the block may only be executed. The contents of the memory block are prohibited from being accessed as data and traversing the DCode bus. The policies may be combined as shown in Table 8-1 on page 141. 140 November 30, 2007 Preliminary Internal Memory Table 8-1. Flash Protection Policy Combinations FMPPEn FMPREn Protection Execute-only protection. The block may only be executed and may not be written or erased. This mode is used to protect code. 0 0 1 0 The block may be written, erased or executed, but not read. This combination is unlikely to be used. Read-only protection. The block may be read or executed but may not be written or erased. This mode is used to lock the block from further modification while allowing any read or execute access. 0 1 1 1 No protection. The block may be written, erased, executed or read. An access that attempts to program or erase a PE-protected block is prohibited. A controller interrupt may be optionally generated (by setting the AMASK bit in the FIM register) to alert software developers of poorly behaving software during the development and debug phases. An access that attempts to read an RE-protected block is prohibited. Such accesses return data filled with all 0s. A controller interrupt may be optionally generated to alert software developers of poorly behaving software during the development and debug phases. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This implements a policy of open access and programmability. The register bits may be changed by writing the specific register bit. The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. Details on programming these bits are discussed in “Nonvolatile Register Programming” on page 142. 8.3 Flash Memory Initialization and Configuration 8.3.1 Flash Programming The Stellaris® devices provide a user-friendly interface for flash programming. All erase/program operations are handled via three registers: FMA, FMD, and FMC. 8.3.1.1 To program a 32-bit word 1. Write source data to the FMD register. 2. Write the target address to the FMA register. 3. Write the flash write key and the WRITE bit (a value of 0xA442.0001) to the FMC register. 4. Poll the FMC register until the WRITE bit is cleared. 8.3.1.2 To perform an erase of a 1-KB page 1. Write the page address to the FMA register. 2. Write the flash write key and the ERASE bit (a value of 0xA442.0002) to the FMC register. 3. Poll the FMC register until the ERASE bit is cleared. 8.3.1.3 To perform a mass erase of the flash 1. Write the flash write key and the MERASE bit (a value of 0xA442.0004) to the FMC register. 2. Poll the FMC register until the MERASE bit is cleared. November 30, 2007 141 Preliminary LM3S6952 Microcontroller 8.3.2 Nonvolatile Register Programming This section discusses how to update registers that are resident within the flash memory itself. These registers exist in a separate space from the main flash array and are not affected by an ERASE or MASS ERASE operation. These nonvolatile registers are updated by using the COMT bit in the FMC register to activate a write operation. For the USER_DBG register, the data to be written must be loaded into the FMD register before it is "committed". All other registers are R/W and can have their operation tried before committing them to nonvolatile memory. Important: These registers can only have bits changed from 1 to 0 by the user and there is no mechanism for the user to erase them back to a 1 value. In addition, the USER_REG0, USER_REG1, and USER_DBG use bit 31 (NW) of their respective registers to indicate that they are available for user write. These three registers can only be written once whereas the flash protection registers may be written multiple times. Table 8-2 on page 142 provides the FMA address required for commitment of each of the registers and the source of the data to be written when the COMT bit of the FMC register is written with a value of 0xA442.0008. After writing the COMT bit, the user may poll the FMC register to wait for the commit operation to complete. Table 8-2. Flash Resident Registersa Register to be Committed FMA Value Data Source FMPRE0 0x0000.0000 FMPRE0 FMPRE1 0x0000.0002 FMPRE1 FMPRE2 0x0000.0004 FMPRE2 FMPRE3 0x0000.0008 FMPRE3 FMPPE0 0x0000.0001 FMPPE0 FMPPE1 0x0000.0003 FMPPE1 FMPPE2 0x0000.0005 FMPPE2 FMPPE3 0x0000.0007 FMPPE3 USER_REG0 0x8000.0000 USER_REG0 USER_REG1 0x8000.0001 USER_REG1 USER_DBG 0x7510.0000 FMD a. Which FMPREn and FMPPEn registers are available depend on the flash size of your particular Stellaris® device. 8.4 Register Map Table 8-3 on page 142 lists the Flash memory and control registers. The offset listed is a hexadecimal increment to the register's address. The FMA, FMD, FMC, FCRIS, FCIM, and FCMISC registers are relative to the Flash control base address of 0x400F.D000. The FMPREn, FMPPEn, USECRL, USER_DBG, and USER_REGn registers are relative to the System Control base address of 0x400F.E000. Table 8-3. Flash Register Map See Offset Name Type Reset Description page Flash Control Offset 0x000 FMA R/W 0x0000.0000 Flash Memory Address 144 142 November 30, 2007 Preliminary Internal Memory See Offset Name Type Reset Description page 0x004 FMD R/W 0x0000.0000 Flash Memory Data 145 0x008 FMC R/W 0x0000.0000 Flash Memory Control 146 0x00C FCRIS RO 0x0000.0000 Flash Controller Raw Interrupt Status 148 0x010 FCIM R/W 0x0000.0000 Flash Controller Interrupt Mask 149 0x014 FCMISC R/W1C 0x0000.0000 Flash Controller Masked Interrupt Status and Clear 150 System Control Offset 0x130 FMPRE0 R/W 0xFFFF.FFFF Flash Memory Protection Read Enable 0 152 0x200 FMPRE0 R/W 0xFFFF.FFFF Flash Memory Protection Read Enable 0 152 0x134 FMPPE0 R/W 0xFFFF.FFFF Flash Memory Protection Program Enable 0 153 0x400 FMPPE0 R/W 0xFFFF.FFFF Flash Memory Protection Program Enable 0 153 0x140 USECRL R/W 0x31 USec Reload 151 0x1D0 USER_DBG R/W 0xFFFF.FFFE User Debug 154 0x1E0 USER_REG0 R/W 0xFFFF.FFFF User Register 0 155 0x1E4 USER_REG1 R/W 0xFFFF.FFFF User Register 1 156 0x204 FMPRE1 R/W 0xFFFF.FFFF Flash Memory Protection Read Enable 1 157 0x208 FMPRE2 R/W 0xFFFF.FFFF Flash Memory Protection Read Enable 2 158 0x20C FMPRE3 R/W 0xFFFF.FFFF Flash Memory Protection Read Enable 3 159 0x404 FMPPE1 R/W 0xFFFF.FFFF Flash Memory Protection Program Enable 1 160 0x408 FMPPE2 R/W 0xFFFF.FFFF Flash Memory Protection Program Enable 2 161 0x40C FMPPE3 R/W 0xFFFF.FFFF Flash Memory Protection Program Enable 3 162 8.5 Flash Register Descriptions (Flash Control Offset) The remainder of this section lists and describes the Flash Memory registers, in numerical order by address offset. Registers in this section are relative to the Flash control base address of 0x400F.D000. November 30, 2007 143 Preliminary LM3S6952 Microcontroller Register 1: Flash Memory Address (FMA), offset 0x000 During a write operation, this register contains a 4-byte-aligned address and specifies where the data is written. During erase operations, this register contains a 1 KB-aligned address and specifies which page is erased. Note that the alignment requirements must be met by software or the results of the operation are unpredictable. Flash Memory Address (FMA) Base 0x400F.D000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved OFFSET Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 OFFSET Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:18 reserved RO 0x0 Address Offset Address offset in flash where operation is performed, except for nonvolatile registers (see “Nonvolatile Register Programming” on page 142 for details on values for this field). 17:0 OFFSET R/W 0x0 144 November 30, 2007 Preliminary Internal Memory Register 2: Flash Memory Data (FMD), offset 0x004 This register contains the data to be written during the programming cycle or read during the read cycle. Note that the contents of this register are undefined for a read access of an execute-only block. This register is not used during the erase cycles. Flash Memory Data (FMD) Base 0x400F.D000 Offset 0x004 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Data Value Data value for write operation. 31:0 DATA R/W 0x0 November 30, 2007 145 Preliminary LM3S6952 Microcontroller Register 3: Flash Memory Control (FMC), offset 0x008 When this register is written, the flash controller initiates the appropriate access cycle for the location specified by the Flash Memory Address (FMA) register (see page 144). If the access is a write access, the data contained in the Flash Memory Data (FMD) register (see page 145) is written. This is the final register written and initiates the memory operation. There are four control bits in the lower byte of this register that, when set, initiate the memory operation. The most used of these register bits are the ERASE and WRITE bits. It is a programming error to write multiple control bits and the results of such an operation are unpredictable. Flash Memory Control (FMC) Base 0x400F.D000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 WRKEY Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved COMT MERASE ERASE WRITE Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Flash Write Key This field contains a write key, which is used to minimize the incidence of accidental flash writes. The value 0xA442 must be written into this field for a write to occur. Writes to the FMC register without this WRKEY value are ignored. A read of this field returns the value 0. 31:16 WRKEY WO 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:4 reserved RO 0x0 Commit Register Value Commit (write) of register value to nonvolatile storage. A write of 0 has no effect on the state of this bit. If read, the state of the previous commit access is provided. If the previous commit access is complete, a 0 is returned; otherwise, if the commit access is not complete, a 1 is returned. This can take up to 50 μs. 3 COMT R/W 0 Mass Erase Flash Memory If this bit is set, the flash main memory of the device is all erased. A write of 0 has no effect on the state of this bit. If read, the state of the previous mass erase access is provided. If the previous mass erase access is complete, a 0 is returned; otherwise, if the previous mass erase access is not complete, a 1 is returned. This can take up to 250 ms. 2 MERASE R/W 0 146 November 30, 2007 Preliminary Internal Memory Bit/Field Name Type Reset Description Erase a Page of Flash Memory If this bit is set, the page of flash main memory as specified by the contents of FMA is erased. A write of 0 has no effect on the state of this bit. If read, the state of the previous erase access is provided. If the previous erase access is complete, a 0 is returned; otherwise, if the previous erase access is not complete, a 1 is returned. This can take up to 25 ms. 1 ERASE R/W 0 Write a Word into Flash Memory If this bit is set, the data stored in FMD is written into the location as specified by the contents of FMA. A write of 0 has no effect on the state of this bit. If read, the state of the previous write update is provided. If the previous write access is complete, a 0 is returned; otherwise, if the write access is not complete, a 1 is returned. This can take up to 50 μs. 0 WRITE R/W 0 November 30, 2007 147 Preliminary LM3S6952 Microcontroller Register 4: Flash Controller Raw Interrupt Status (FCRIS), offset 0x00C This register indicates that the flash controller has an interrupt condition. An interrupt is only signaled if the corresponding FCIM register bit is set. Flash Controller Raw Interrupt Status (FCRIS) Base 0x400F.D000 Offset 0x00C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PRIS ARIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Programming Raw Interrupt Status This bit indicates the current state of the programming cycle. If set, the programming cycle completed; if cleared, the programming cycle has not completed. Programming cycles are either write or erase actions generated through the Flash Memory Control (FMC) register bits (see page 146). 1 PRIS RO 0 Access Raw Interrupt Status This bit indicates if the flash was improperly accessed. If set, the program tried to access the flash counter to the policy as set in the Flash Memory Protection Read Enable (FMPREn) and Flash Memory Protection Program Enable (FMPPEn) registers. Otherwise, no access has tried to improperly access the flash. 0 ARIS RO 0 148 November 30, 2007 Preliminary Internal Memory Register 5: Flash Controller Interrupt Mask (FCIM), offset 0x010 This register controls whether the flash controller generates interrupts to the controller. Flash Controller Interrupt Mask (FCIM) Base 0x400F.D000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PMASK AMASK Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Programming Interrupt Mask This bit controls the reporting of the programming raw interrupt status to the controller. If set, a programming-generated interrupt is promoted to the controller. Otherwise, interrupts are recorded but suppressed from the controller. 1 PMASK R/W 0 Access Interrupt Mask This bit controls the reporting of the access raw interrupt status to the controller. If set, an access-generated interrupt is promoted to the controller. Otherwise, interrupts are recorded but suppressed from the controller. 0 AMASK R/W 0 November 30, 2007 149 Preliminary LM3S6952 Microcontroller Register 6: Flash Controller Masked Interrupt Status and Clear (FCMISC), offset 0x014 This register provides two functions. First, it reports the cause of an interrupt by indicating which interrupt source or sources are signalling the interrupt. Second, it serves as the method to clear the interrupt reporting. Flash Controller Masked Interrupt Status and Clear (FCMISC) Base 0x400F.D000 Offset 0x014 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PMISC AMISC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Programming Masked Interrupt Status and Clear This bit indicates whether an interrupt was signaled because a programming cycle completed and was not masked. This bit is cleared by writing a 1. The PRIS bit in the FCRIS register (see page 148) is also cleared when the PMISC bit is cleared. 1 PMISC R/W1C 0 Access Masked Interrupt Status and Clear This bit indicates whether an interrupt was signaled because an improper access was attempted and was not masked. This bit is cleared by writing a 1. The ARIS bit in the FCRIS register is also cleared when the AMISC bit is cleared. 0 AMISC R/W1C 0 8.6 Flash Register Descriptions (System Control Offset) The remainder of this section lists and describes the Flash Memory registers, in numerical order by address offset. Registers in this section are relative to the System Control base address of 0x400F.E000. 150 November 30, 2007 Preliminary Internal Memory Register 7: USec Reload (USECRL), offset 0x140 Note: Offset is relative to System Control base address of 0x400F.E000 This register is provided as a means of creating a 1-μs tick divider reload value for the flash controller. The internal flash has specific minimum and maximum requirements on the length of time the high voltage write pulse can be applied. It is required that this register contain the operating frequency (in MHz -1) whenever the flash is being erased or programmed. The user is required to change this value if the clocking conditions are changed for a flash erase/program operation. USec Reload (USECRL) Base 0x400F.E000 Offset 0x140 Type R/W, reset 0x31 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved USEC Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Microsecond Reload Value MHz -1 of the controller clock when the flash is being erased or programmed. USEC should be set to 0x31 (50 MHz) whenever the flash is being erased or programmed. 7:0 USEC R/W 0x31 November 30, 2007 151 Preliminary LM3S6952 Microcontroller Register 8: Flash Memory Protection Read Enable 0 (FMPRE0), offset 0x130 and 0x200 Note: This register is aliased for backwards compatability. Note: Offset is relative to System Control base address of 0x400FE000. This register stores the read-only protection bits for each 2-KB flash block (FMPPEn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Read Enable 0 (FMPRE0) Base 0x400F.D000 Offset 0x130 and 0x200 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Read Enable Enables 2-KB flash blocks to be executed or read. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 READ_ENABLE R/W 0xFFFFFFFF 152 November 30, 2007 Preliminary Internal Memory Register 9: Flash Memory Protection Program Enable 0 (FMPPE0), offset 0x134 and 0x400 Note: This register is aliased for backwards compatability. Note: Offset is relative to System Control base address of 0x400FE000. This register stores the execute-only protection bits for each 2-KB flash block (FMPREn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Program Enable 0 (FMPPE0) Base 0x400F.D000 Offset 0x134 and 0x400 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Programming Enable Configures 2-KB flash blocks to be execute only. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 PROG_ENABLE R/W 0xFFFFFFFF November 30, 2007 153 Preliminary LM3S6952 Microcontroller Register 10: User Debug (USER_DBG), offset 0x1D0 Note: Offset is relative to System Control base address of 0x400FE000. This register provides a write-once mechanism to disable external debugger access to the device in addition to 27 additional bits of user-defined data. The DBG0 bit (bit 0) is set to 0 from the factory and the DBG1 bit (bit 1) is set to 1, which enables external debuggers. Changing the DBG1 bit to 0 disables any external debugger access to the device permanently, starting with the next power-up cycle of the device. The NOTWRITTEN bit (bit 31) indicates that the register is available to be written and is controlled through hardware to ensure that the register is only written once. User Debug (USER_DBG) Base 0x400F.E000 Offset 0x1D0 Type R/W, reset 0xFFFF.FFFE 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 NW DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DATA DBG1 DBG0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 Bit/Field Name Type Reset Description User Debug Not Written Specifies that this 32-bit dword has not been written. 31 NW R/W 1 User Data Contains the user data value. This field is initialized to all 1s and can only be written once. 30:2 DATA R/W 0x1FFFFFFF Debug Control 1 The DBG1 bit must be 1 and DBG0 must be 0 for debug to be available. 1 DBG1 R/W 1 Debug Control 0 The DBG1 bit must be 1 and DBG0 must be 0 for debug to be available. 0 DBG0 R/W 0 154 November 30, 2007 Preliminary Internal Memory Register 11: User Register 0 (USER_REG0), offset 0x1E0 Note: Offset is relative to System Control base address of 0x400FE000. This register provides 31 bits of user-defined data that is non-volatile and can only be written once. Bit 31 indicates that the register is available to be written and is controlled through hardware to ensure that the register is only written once. The write-once characteristics of this register are useful for keeping static information like communication addresses that need to be unique per part and would otherwise require an external EEPROM or other non-volatile device. User Register 0 (USER_REG0) Base 0x400F.E000 Offset 0x1E0 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 NW DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Not Written Specifies that this 32-bit dword has not been written. 31 NW R/W 1 User Data Contains the user data value. This field is initialized to all 1s and can only be written once. 30:0 DATA R/W 0x7FFFFFFF November 30, 2007 155 Preliminary LM3S6952 Microcontroller Register 12: User Register 1 (USER_REG1), offset 0x1E4 Note: Offset is relative to System Control base address of 0x400FE000. This register provides 31 bits of user-defined data that is non-volatile and can only be written once. Bit 31 indicates that the register is available to be written and is controlled through hardware to ensure that the register is only written once. The write-once characteristics of this register are useful for keeping static information like communication addresses that need to be unique per part and would otherwise require an external EEPROM or other non-volatile device. User Register 1 (USER_REG1) Base 0x400F.E000 Offset 0x1E4 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 NW DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Not Written Specifies that this 32-bit dword has not been written. 31 NW R/W 1 User Data Contains the user data value. This field is initialized to all 1s and can only be written once. 30:0 DATA R/W 0x7FFFFFFF 156 November 30, 2007 Preliminary Internal Memory Register 13: Flash Memory Protection Read Enable 1 (FMPRE1), offset 0x204 Note: Offset is relative to System Control base address of 0x400FE000. This register stores the read-only protection bits for each 2-KB flash block (FMPPEn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Read Enable 1 (FMPRE1) Base 0x400F.E000 Offset 0x204 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Read Enable Enables 2-KB flash blocks to be executed or read. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 READ_ENABLE R/W 0xFFFFFFFF November 30, 2007 157 Preliminary LM3S6952 Microcontroller Register 14: Flash Memory Protection Read Enable 2 (FMPRE2), offset 0x208 Note: Offset is relative to System Control base address of 0x400FE000. This register stores the read-only protection bits for each 2-KB flash block (FMPPEn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Read Enable 2 (FMPRE2) Base 0x400F.E000 Offset 0x208 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Read Enable Enables 2-KB flash blocks to be executed or read. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 READ_ENABLE R/W 0xFFFFFFFF 158 November 30, 2007 Preliminary Internal Memory Register 15: Flash Memory Protection Read Enable 3 (FMPRE3), offset 0x20C Note: Offset is relative to System Control base address of 0x400FE000. This register stores the read-only protection bits for each 2-KB flash block (FMPPEn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Read Enable 3 (FMPRE3) Base 0x400F.E000 Offset 0x20C Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 READ_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Read Enable Enables 2-KB flash blocks to be executed or read. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 READ_ENABLE R/W 0xFFFFFFFF November 30, 2007 159 Preliminary LM3S6952 Microcontroller Register 16: Flash Memory Protection Program Enable 1 (FMPPE1), offset 0x404 Note: Offset is relative to System Control base address of 0x400FE000. This register stores the execute-only protection bits for each 2-KB flash block (FMPREn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Program Enable 1 (FMPPE1) Base 0x400F.E000 Offset 0x404 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Programming Enable Configures 2-KB flash blocks to be execute only. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 PROG_ENABLE R/W 0xFFFFFFFF 160 November 30, 2007 Preliminary Internal Memory Register 17: Flash Memory Protection Program Enable 2 (FMPPE2), offset 0x408 Note: Offset is relative to System Control base address of 0x400FE000. This register stores the execute-only protection bits for each 2-KB flash block (FMPREn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Program Enable 2 (FMPPE2) Base 0x400F.E000 Offset 0x408 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Programming Enable Configures 2-KB flash blocks to be execute only. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 PROG_ENABLE R/W 0xFFFFFFFF November 30, 2007 161 Preliminary LM3S6952 Microcontroller Register 18: Flash Memory Protection Program Enable 3 (FMPPE3), offset 0x40C Note: Offset is relative to System Control base address of 0x400FE000. This register stores the execute-only protection bits for each 2-KB flash block (FMPREn stores the execute-only bits). This register is loaded during the power-on reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for all implemented banks. This achieves a policy of open access and programmability. The register bits may be changed by writing the specific register bit. However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it may be restored by executing a power-on reset sequence. For additional information, see the "Flash Memory Protection" section. Flash Memory Protection Program Enable 3 (FMPPE3) Base 0x400F.E000 Offset 0x40C Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PROG_ENABLE Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Flash Programming Enable Configures 2-KB flash blocks to be execute only. The policies may be combined as shown in the table “Flash Protection Policy Combinations”. Value Description 0xFFFFFFFF Enables 256 KB of flash. 31:0 PROG_ENABLE R/W 0xFFFFFFFF 162 November 30, 2007 Preliminary Internal Memory 9 General-Purpose Input/Outputs (GPIOs) The GPIO module is composed of seven physical GPIO blocks, each corresponding to an individual GPIO port (Port A, Port B, Port C, Port D, Port E, Port F, and Port G, ). The GPIO module is FiRM-compliant and supports 6-43 programmable input/output pins, depending on the peripherals being used. The GPIO module has the following features: ■ Programmable control for GPIO interrupts – Interrupt generation masking – Edge-triggered on rising, falling, or both – Level-sensitive on High or Low values ■ 5-V-tolerant input/outputs ■ Bit masking in both read and write operations through address lines ■ Programmable control for GPIO pad configuration – Weak pull-up or pull-down resistors – 2-mA, 4-mA, and 8-mA pad drive – Slew rate control for the 8-mA drive – Open drain enables – Digital input enables 9.1 Functional Description Important: All GPIO pins are tri-stated by default (GPIOAFSEL=0, GPIODEN=0, GPIOPDR=0, and GPIOPUR=0), with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). The JTAG/SWD pins default to their JTAG/SWD functionality (GPIOAFSEL=1, GPIODEN=1 and GPIOPUR=1). A Power-On-Reset (POR) or asserting RST puts both groups of pins back to their default state. Each GPIO port is a separate hardware instantiation of the same physical block (see Figure 9-1 on page 164). The LM3S6952 microcontroller contains seven ports and thus seven of these physical GPIO blocks. November 30, 2007 163 Preliminary LM3S6952 Microcontroller Figure 9-1. GPIO Port Block Diagram Alternate Input Alternate Output Alternate Output Enable Interrupt GPIO Input GPIO Output GPIO Output Enable Pad Output Pad Output Enable Package I/O Pin GPIODATA GPIODIR Data Control GPIOIS GPIOIBE GPIOIEV GPIOIM GPIORIS GPIOMIS GPIOICR Interrupt Control GPIODR2R GPIODR4R GPIODR8R GPIOSLR GPIOPUR GPIOPDR GPIOODR GPIODEN Pad Control GPIOPeriphID0 GPIOPeriphID1 GPIOPeriphID2 GPIOPeriphID3 GPIOPeriphID4 GPIOPeriphID5 GPIOPeriphID6 GPIOPeriphID7 GPIOPCellID0 GPIOPCellID1 GPIOPCellID2 GPIOPCellID3 Identification Registers GPIOAFSEL Mode Control DEMUX MUX MUX Digital I/O Pad Pad Input GPIOLOCK Commit Control GPIOCR 9.1.1 Data Control The data control registers allow software to configure the operational modes of the GPIOs. The data direction register configures the GPIO as an input or an output while the data register either captures incoming data or drives it out to the pads. 9.1.1.1 Data Direction Operation The GPIO Direction (GPIODIR) register (see page 171) is used to configure each individual pin as an input or output. When the data direction bit is set to 0, the GPIO is configured as an input and the corresponding data register bit will capture and store the value on the GPIO port. When the data direction bit is set to 1, the GPIO is configured as an output and the corresponding data register bit will be driven out on the GPIO port. 9.1.1.2 Data Register Operation To aid in the efficiency of software, the GPIO ports allow for the modification of individual bits in the GPIO Data (GPIODATA) register (see page 170) by using bits [9:2] of the address bus as a mask. This allows software drivers to modify individual GPIO pins in a single instruction, without affecting the state of the other pins. This is in contrast to the "typical" method of doing a read-modify-write operation to set or clear an individual GPIO pin. To accommodate this feature, the GPIODATA register covers 256 locations in the memory map. During a write, if the address bit associated with that data bit is set to 1, the value of the GPIODATA register is altered. If it is cleared to 0, it is left unchanged. 164 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) For example, writing a value of 0xEB to the address GPIODATA + 0x098 would yield as shown in Figure 9-2 on page 165, where u is data unchanged by the write. Figure 9-2. GPIODATA Write Example 0 0 1 0 0 1 1 0 1 0 u u 1 u u 0 1 u 9 8 7 6 5 4 3 2 1 0 1 1 1 0 1 0 1 1 7 6 5 4 3 2 1 0 GPIODATA 0xEB 0x098 ADDR[9:2] During a read, if the address bit associated with the data bit is set to 1, the value is read. If the address bit associated with the data bit is set to 0, it is read as a zero, regardless of its actual value. For example, reading address GPIODATA + 0x0C4 yields as shown in Figure 9-3 on page 165. Figure 9-3. GPIODATA Read Example 0 0 1 1 0 0 0 1 0 0 0 0 1 1 0 0 0 0 9 8 7 6 5 4 3 2 1 0 1 0 1 1 1 1 1 0 7 6 5 4 3 2 1 0 Returned Value GPIODATA 0x0C4 ADDR[9:2] 9.1.2 Interrupt Control The interrupt capabilities of each GPIO port are controlled by a set of seven registers. With these registers, it is possible to select the source of the interrupt, its polarity, and the edge properties. When one or more GPIO inputs cause an interrupt, a single interrupt output is sent to the interrupt controller for the entire GPIO port. For edge-triggered interrupts, software must clear the interrupt to enable any further interrupts. For a level-sensitive interrupt, it is assumed that the external source holds the level constant for the interrupt to be recognized by the controller. Three registers are required to define the edge or sense that causes interrupts: ■ GPIO Interrupt Sense (GPIOIS) register (see page 172) ■ GPIO Interrupt Both Edges (GPIOIBE) register (see page 173) ■ GPIO Interrupt Event (GPIOIEV) register (see page 174) Interrupts are enabled/disabled via the GPIO Interrupt Mask (GPIOIM) register (see page 175). When an interrupt condition occurs, the state of the interrupt signal can be viewed in two locations: the GPIO Raw Interrupt Status (GPIORIS) and GPIO Masked Interrupt Status (GPIOMIS) registers (see page 176 and page 177). As the name implies, the GPIOMIS register only shows interrupt conditions that are allowed to be passed to the controller. The GPIORIS register indicates that a GPIO pin meets the conditions for an interrupt, but has not necessarily been sent to the controller. November 30, 2007 165 Preliminary LM3S6952 Microcontroller In addition to providing GPIO functionality, PB4 can also be used as an external trigger for the ADC. If PB4 is configured as a non-masked interrupt pin (GPIOIM is set to 1), not only is an interrupt for PortB generated, but an external trigger signal is sent to the ADC. If the ADC Event Multiplexer Select (ADCEMUX) register is configured to use the external trigger, an ADC conversion is initiated. If no other PortB pins are being used to generate interrupts, the ARM Integrated Nested Vectored Interrupt Controller (NVIC) Interrupt Set Enable (SETNA) register can disable the PortB interrupts and the ADC interrupt can be used to read back the converted data. Otherwise, the PortB interrupt handler needs to ignore and clear interrupts on B4, and wait for the ADC interrupt or the ADC interrupt needs to be disabled in the SETNA register and the PortB interrupt handler polls the ADC registers until the conversion is completed. Interrupts are cleared by writing a 1 to the GPIO Interrupt Clear (GPIOICR) register (see page 178). When programming the following interrupt control registers, the interrupts should be masked (GPIOIM set to 0). Writing any value to an interrupt control register (GPIOIS, GPIOIBE, or GPIOIEV) can generate a spurious interrupt if the corresponding bits are enabled. 9.1.3 Mode Control The GPIO pins can be controlled by either hardware or software. When hardware control is enabled via the GPIO Alternate Function Select (GPIOAFSEL) register (see page 179), the pin state is controlled by its alternate function (that is, the peripheral). Software control corresponds to GPIO mode, where the GPIODATA register is used to read/write the corresponding pins. 9.1.4 Commit Control The commit control registers provide a layer of protection against accidental programming of critical hardware peripherals. Writes to protected bits of the GPIO Alternate Function Select (GPIOAFSEL) register (see page 179) are not committed to storage unless the GPIO Lock (GPIOLOCK) register (see page 189) has been unlocked and the appropriate bits of the GPIO Commit (GPIOCR) register (see page 190) have been set to 1. 9.1.5 Pad Control The pad control registers allow for GPIO pad configuration by software based on the application requirements. The pad control registers include the GPIODR2R, GPIODR4R, GPIODR8R, GPIOODR, GPIOPUR, GPIOPDR, GPIOSLR, and GPIODEN registers. 9.1.6 Identification The identification registers configured at reset allow software to detect and identify the module as a GPIO block. The identification registers include the GPIOPeriphID0-GPIOPeriphID7 registers as well as the GPIOPCellID0-GPIOPCellID3 registers. 9.2 Initialization and Configuration To use the GPIO, the peripheral clock must be enabled by setting the appropriate GPIO Port bit field (GPIOn) in the RCGC2 register. On reset, all GPIO pins (except for the five JTAG pins) are configured out of reset to be undriven (tristate): GPIOAFSEL=0, GPIODEN=0, GPIOPDR=0, and GPIOPUR=0. Table 9-1 on page 167 shows all possible configurations of the GPIO pads and the control register settings required to achieve them. Table 9-2 on page 167 shows how a rising edge interrupt would be configured for pin 2 of a GPIO port. 166 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Table 9-1. GPIO Pad Configuration Examples Configuration GPIO Register Bit Valuea AFSEL DIR ODR DEN PUR PDR DR2R DR4R DR8R SLR Digital Input (GPIO) 0 0 0 1 ? ? X X X X Digital Output (GPIO) 0 1 0 1 ? ? ? ? ? ? Open Drain Input 0 0 1 1 X X X X X X (GPIO) Open Drain Output 0 1 1 1 X X ? ? ? ? (GPIO) Open Drain 1 X 1 1 X X ? ? ? ? Input/Output (I2C) Digital Input (Timer 1 X 0 1 ? ? X X X X CCP) Digital Input (QEI) 1 X 0 1 ? ? X X X X Digital Output (PWM) 1 X 0 1 ? ? ? ? ? ? Digital Output (Timer 1 X 0 1 ? ? ? ? ? ? PWM) Digital Input/Output 1 X 0 1 ? ? ? ? ? ? (SSI) Digital Input/Output 1 X 0 1 ? ? ? ? ? ? (UART) Analog Input 0 0 0 0 0 0 X X X X (Comparator) Digital Output 1 X 0 1 ? ? ? ? ? ? (Comparator) a. X=Ignored (don’t care bit) ?=Can be either 0 or 1, depending on the configuration Table 9-2. GPIO Interrupt Configuration Example Desired Pin 2 Bit Valuea Interrupt Event Trigger Register 7 6 5 4 3 2 1 0 0=edge X X X X X 0 X X 1=level GPIOIS 0=single X X X X X 0 X X edge 1=both edges GPIOIBE 0=Low level, X X X X X 1 X X or negative edge 1=High level, or positive edge GPIOIEV 0=masked 0 0 0 0 0 1 0 0 1=not masked GPIOIM a. X=Ignored (don’t care bit) November 30, 2007 167 Preliminary LM3S6952 Microcontroller 9.3 Register Map Table 9-3 on page 168 lists the GPIO registers. The offset listed is a hexadecimal increment to the register’s address, relative to that GPIO port’s base address: ■ GPIO Port A: 0x4000.4000 ■ GPIO Port B: 0x4000.5000 ■ GPIO Port C: 0x4000.6000 ■ GPIO Port D: 0x4000.7000 ■ GPIO Port E: 0x4002.4000 ■ GPIO Port F: 0x4002.5000 ■ GPIO Port G: 0x4002.6000 Important: The GPIO registers in this chapter are duplicated in each GPIO block, however, depending on the block, all eight bits may not be connected to a GPIO pad. In those cases, writing to those unconnected bits has no effect and reading those unconnected bits returns no meaningful data. Note: The default reset value for the GPIOAFSEL, GPIOPUR, and GPIODEN registers are 0x0000.0000 for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins default to JTAG/SWD functionality. Because of this, the default reset value of these registers for GPIO Port B is 0x0000.0080 while the default reset value for Port C is 0x0000.000F. The default register type for the GPIOCR register is RO for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins are currently the only GPIOs that are protected by the GPIOCR register. Because of this, the register type for GPIO Port B7 and GPIO Port C[3:0] is R/W. The default reset value for the GPIOCR register is 0x0000.00FF for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). To ensure that the JTAG port is not accidentally programmed as a GPIO, these five pins default to non-commitable. Because of this, the default reset value of GPIOCR for GPIO Port B is 0x0000.007F while the default reset value of GPIOCR for Port C is 0x0000.00F0. Table 9-3. GPIO Register Map See Offset Name Type Reset Description page 0x000 GPIODATA R/W 0x0000.0000 GPIO Data 170 0x400 GPIODIR R/W 0x0000.0000 GPIO Direction 171 0x404 GPIOIS R/W 0x0000.0000 GPIO Interrupt Sense 172 0x408 GPIOIBE R/W 0x0000.0000 GPIO Interrupt Both Edges 173 0x40C GPIOIEV R/W 0x0000.0000 GPIO Interrupt Event 174 0x410 GPIOIM R/W 0x0000.0000 GPIO Interrupt Mask 175 168 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) See Offset Name Type Reset Description page 0x414 GPIORIS RO 0x0000.0000 GPIO Raw Interrupt Status 176 0x418 GPIOMIS RO 0x0000.0000 GPIO Masked Interrupt Status 177 0x41C GPIOICR W1C 0x0000.0000 GPIO Interrupt Clear 178 0x420 GPIOAFSEL R/W - GPIO Alternate Function Select 179 0x500 GPIODR2R R/W 0x0000.00FF GPIO 2-mA Drive Select 181 0x504 GPIODR4R R/W 0x0000.0000 GPIO 4-mA Drive Select 182 0x508 GPIODR8R R/W 0x0000.0000 GPIO 8-mA Drive Select 183 0x50C GPIOODR R/W 0x0000.0000 GPIO Open Drain Select 184 0x510 GPIOPUR R/W - GPIO Pull-Up Select 185 0x514 GPIOPDR R/W 0x0000.0000 GPIO Pull-Down Select 186 0x518 GPIOSLR R/W 0x0000.0000 GPIO Slew Rate Control Select 187 0x51C GPIODEN R/W - GPIO Digital Enable 188 0x520 GPIOLOCK R/W 0x0000.0001 GPIO Lock 189 0x524 GPIOCR - - GPIO Commit 190 0xFD0 GPIOPeriphID4 RO 0x0000.0000 GPIO Peripheral Identification 4 192 0xFD4 GPIOPeriphID5 RO 0x0000.0000 GPIO Peripheral Identification 5 193 0xFD8 GPIOPeriphID6 RO 0x0000.0000 GPIO Peripheral Identification 6 194 0xFDC GPIOPeriphID7 RO 0x0000.0000 GPIO Peripheral Identification 7 195 0xFE0 GPIOPeriphID0 RO 0x0000.0061 GPIO Peripheral Identification 0 196 0xFE4 GPIOPeriphID1 RO 0x0000.0000 GPIO Peripheral Identification 1 197 0xFE8 GPIOPeriphID2 RO 0x0000.0018 GPIO Peripheral Identification 2 198 0xFEC GPIOPeriphID3 RO 0x0000.0001 GPIO Peripheral Identification 3 199 0xFF0 GPIOPCellID0 RO 0x0000.000D GPIO PrimeCell Identification 0 200 0xFF4 GPIOPCellID1 RO 0x0000.00F0 GPIO PrimeCell Identification 1 201 0xFF8 GPIOPCellID2 RO 0x0000.0005 GPIO PrimeCell Identification 2 202 0xFFC GPIOPCellID3 RO 0x0000.00B1 GPIO PrimeCell Identification 3 203 9.4 Register Descriptions The remainder of this section lists and describes the GPIO registers, in numerical order by address offset. November 30, 2007 169 Preliminary LM3S6952 Microcontroller Register 1: GPIO Data (GPIODATA), offset 0x000 The GPIODATA register is the data register. In software control mode, values written in the GPIODATA register are transferred onto the GPIO port pins if the respective pins have been configured as outputs through the GPIO Direction (GPIODIR) register (see page 171). In order to write to GPIODATA, the corresponding bits in the mask, resulting from the address bus bits [9:2], must be High. Otherwise, the bit values remain unchanged by the write. Similarly, the values read from this register are determined for each bit by the mask bit derived from the address used to access the data register, bits [9:2]. Bits that are 1 in the address mask cause the corresponding bits in GPIODATA to be read, and bits that are 0 in the address mask cause the corresponding bits in GPIODATA to be read as 0, regardless of their value. A read from GPIODATA returns the last bit value written if the respective pins are configured as outputs, or it returns the value on the corresponding input pin when these are configured as inputs. All bits are cleared by a reset. GPIO Data (GPIODATA) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DATA Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Data This register is virtually mapped to 256 locations in the address space. To facilitate the reading and writing of data to these registers by independent drivers, the data read from and the data written to the registers are masked by the eight address lines ipaddr[9:2]. Reads from this register return its current state. Writes to this register only affect bits that are not masked by ipaddr[9:2] and are configured as outputs. See “Data Register Operation” on page 164 for examples of reads and writes. 7:0 DATA R/W 0x00 170 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 2: GPIO Direction (GPIODIR), offset 0x400 The GPIODIR register is the data direction register. Bits set to 1 in the GPIODIR register configure the corresponding pin to be an output, while bits set to 0 configure the pins to be inputs. All bits are cleared by a reset, meaning all GPIO pins are inputs by default. GPIO Direction (GPIODIR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x400 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DIR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Data Direction The DIR values are defined as follows: Value Description 0 Pins are inputs. 1 Pins are outputs. 7:0 DIR R/W 0x00 November 30, 2007 171 Preliminary LM3S6952 Microcontroller Register 3: GPIO Interrupt Sense (GPIOIS), offset 0x404 The GPIOIS register is the interrupt sense register. Bits set to 1 in GPIOIS configure the corresponding pins to detect levels, while bits set to 0 configure the pins to detect edges. All bits are cleared by a reset. GPIO Interrupt Sense (GPIOIS) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x404 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IS Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Sense The IS values are defined as follows: Value Description 0 Edge on corresponding pin is detected (edge-sensitive). 1 Level on corresponding pin is detected (level-sensitive). 7:0 IS R/W 0x00 172 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 4: GPIO Interrupt Both Edges (GPIOIBE), offset 0x408 The GPIOIBE register is the interrupt both-edges register. When the corresponding bit in the GPIO Interrupt Sense (GPIOIS) register (see page 172) is set to detect edges, bits set to High in GPIOIBE configure the corresponding pin to detect both rising and falling edges, regardless of the corresponding bit in the GPIO Interrupt Event (GPIOIEV) register (see page 174). Clearing a bit configures the pin to be controlled by GPIOIEV. All bits are cleared by a reset. GPIO Interrupt Both Edges (GPIOIBE) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x408 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IBE Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Both Edges The IBE values are defined as follows: Value Description Interrupt generation is controlled by the GPIO Interrupt Event (GPIOIEV) register (see page 174). 0 1 Both edges on the corresponding pin trigger an interrupt. Note: Single edge is determined by the corresponding bit in GPIOIEV. 7:0 IBE R/W 0x00 November 30, 2007 173 Preliminary LM3S6952 Microcontroller Register 5: GPIO Interrupt Event (GPIOIEV), offset 0x40C The GPIOIEV register is the interrupt event register. Bits set to High in GPIOIEV configure the corresponding pin to detect rising edges or high levels, depending on the corresponding bit value in the GPIO Interrupt Sense (GPIOIS) register (see page 172). Clearing a bit configures the pin to detect falling edges or low levels, depending on the corresponding bit value in GPIOIS. All bits are cleared by a reset. GPIO Interrupt Event (GPIOIEV) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x40C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IEV Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Event The IEV values are defined as follows: Value Description Falling edge or Low levels on corresponding pins trigger interrupts. 0 Rising edge or High levels on corresponding pins trigger interrupts. 1 7:0 IEV R/W 0x00 174 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 6: GPIO Interrupt Mask (GPIOIM), offset 0x410 The GPIOIM register is the interrupt mask register. Bits set to High in GPIOIM allow the corresponding pins to trigger their individual interrupts and the combined GPIOINTR line. Clearing a bit disables interrupt triggering on that pin. All bits are cleared by a reset. GPIO Interrupt Mask (GPIOIM) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x410 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IME Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Mask Enable The IME values are defined as follows: Value Description 0 Corresponding pin interrupt is masked. 1 Corresponding pin interrupt is not masked. 7:0 IME R/W 0x00 November 30, 2007 175 Preliminary LM3S6952 Microcontroller Register 7: GPIO Raw Interrupt Status (GPIORIS), offset 0x414 The GPIORIS register is the raw interrupt status register. Bits read High in GPIORIS reflect the status of interrupt trigger conditions detected (raw, prior to masking), indicating that all the requirements have been met, before they are finally allowed to trigger by the GPIO Interrupt Mask (GPIOIM) register (see page 175). Bits read as zero indicate that corresponding input pins have not initiated an interrupt. All bits are cleared by a reset. GPIO Raw Interrupt Status (GPIORIS) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x414 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Raw Status Reflects the status of interrupt trigger condition detection on pins (raw, prior to masking). The RIS values are defined as follows: Value Description 0 Corresponding pin interrupt requirements not met. 1 Corresponding pin interrupt has met requirements. 7:0 RIS RO 0x00 176 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 8: GPIO Masked Interrupt Status (GPIOMIS), offset 0x418 The GPIOMIS register is the masked interrupt status register. Bits read High in GPIOMIS reflect the status of input lines triggering an interrupt. Bits read as Low indicate that either no interrupt has been generated, or the interrupt is masked. In addition to providing GPIO functionality, PB4 can also be used as an external trigger for the ADC. If PB4 is configured as a non-masked interrupt pin (GPIOIM is set to 1), not only is an interrupt for PortB generated, but an external trigger signal is sent to the ADC. If the ADC Event Multiplexer Select (ADCEMUX) register is configured to use the external trigger, an ADC conversion is initiated. If no other PortB pins are being used to generate interrupts, the ARM Integrated Nested Vectored Interrupt Controller (NVIC) Interrupt Set Enable (SETNA) register can disable the PortB interrupts and the ADC interrupt can be used to read back the converted data. Otherwise, the PortB interrupt handler needs to ignore and clear interrupts on B4, and wait for the ADC interrupt or the ADC interrupt needs to be disabled in the SETNA register and the PortB interrupt handler polls the ADC registers until the conversion is completed. GPIOMIS is the state of the interrupt after masking. GPIO Masked Interrupt Status (GPIOMIS) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x418 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Masked Interrupt Status Masked value of interrupt due to corresponding pin. The MIS values are defined as follows: Value Description 0 Corresponding GPIO line interrupt not active. 1 Corresponding GPIO line asserting interrupt. 7:0 MIS RO 0x00 November 30, 2007 177 Preliminary LM3S6952 Microcontroller Register 9: GPIO Interrupt Clear (GPIOICR), offset 0x41C The GPIOICR register is the interrupt clear register. Writing a 1 to a bit in this register clears the corresponding interrupt edge detection logic register. Writing a 0 has no effect. GPIO Interrupt Clear (GPIOICR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x41C Type W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IC Type RO RO RO RO RO RO RO RO W1C W1C W1C W1C W1C W1C W1C W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Interrupt Clear The IC values are defined as follows: Value Description 0 Corresponding interrupt is unaffected. 1 Corresponding interrupt is cleared. 7:0 IC W1C 0x00 178 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 10: GPIO Alternate Function Select (GPIOAFSEL), offset 0x420 The GPIOAFSEL register is the mode control select register. Writing a 1 to any bit in this register selects the hardware control for the corresponding GPIO line. All bits are cleared by a reset, therefore no GPIO line is set to hardware control by default. The commit control registers provide a layer of protection against accidental programming of critical hardware peripherals. Writes to protected bits of the GPIO Alternate Function Select (GPIOAFSEL) register (see page 179) are not committed to storage unless the GPIO Lock (GPIOLOCK) register (see page 189) has been unlocked and the appropriate bits of the GPIO Commit (GPIOCR) register (see page 190) have been set to 1. Important: All GPIO pins are tri-stated by default (GPIOAFSEL=0, GPIODEN=0, GPIOPDR=0, and GPIOPUR=0), with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). The JTAG/SWD pins default to their JTAG/SWD functionality (GPIOAFSEL=1, GPIODEN=1 and GPIOPUR=1). A Power-On-Reset (POR) or asserting RST puts both groups of pins back to their default state. Caution – If the JTAG pins are used as GPIOs in a design, PB7 and PC2 cannot have external pull-down resistors connected to both of them at the same time. If both pins are pulled Low during reset, the controller has unpredictable behavior. If this happens, remove one or both of the pull-down resistors, and apply RST or power-cycle the part. In addition, it is possible to create a software sequence that prevents the debugger from connecting to the Stellaris® microcontroller. If the program code loaded into flash immediately changes the JTAG pins to their GPIO functionality, the debugger may not have enough time to connect and halt the controller before the JTAG pin functionality switches. This may lock the debugger out of the part. This can be avoided with a software routine that restores JTAG functionality based on an external or software trigger. GPIO Alternate Function Select (GPIOAFSEL) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x420 Type R/W, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved AFSEL Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 November 30, 2007 179 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description GPIO Alternate Function Select The AFSEL values are defined as follows: Value Description 0 Software control of corresponding GPIO line (GPIO mode). Hardware control of corresponding GPIO line (alternate hardware function). 1 Note: The default reset value for the GPIOAFSEL, GPIOPUR, and GPIODEN registers are 0x0000.0000 for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins default to JTAG/SWD functionality. Because of this, the default reset value of these registers for GPIO Port B is 0x0000.0080 while the default reset value for Port C is 0x0000.000F. 7:0 AFSEL R/W - 180 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 11: GPIO 2-mA Drive Select (GPIODR2R), offset 0x500 The GPIODR2R register is the 2-mA drive control register. It allows for each GPIO signal in the port to be individually configured without affecting the other pads. When writing a DRV2 bit for a GPIO signal, the corresponding DRV4 bit in the GPIODR4R register and the DRV8 bit in the GPIODR8R register are automatically cleared by hardware. GPIO 2-mA Drive Select (GPIODR2R) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x500 Type R/W, reset 0x0000.00FF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DRV2 Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Output Pad 2-mA Drive Enable A write of 1 to either GPIODR4[n] or GPIODR8[n] clears the corresponding 2-mA enable bit. The change is effective on the second clock cycle after the write. 7:0 DRV2 R/W 0xFF November 30, 2007 181 Preliminary LM3S6952 Microcontroller Register 12: GPIO 4-mA Drive Select (GPIODR4R), offset 0x504 The GPIODR4R register is the 4-mA drive control register. It allows for each GPIO signal in the port to be individually configured without affecting the other pads. When writing the DRV4 bit for a GPIO signal, the corresponding DRV2 bit in the GPIODR2R register and the DRV8 bit in the GPIODR8R register are automatically cleared by hardware. GPIO 4-mA Drive Select (GPIODR4R) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x504 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DRV4 Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Output Pad 4-mA Drive Enable A write of 1 to either GPIODR2[n] or GPIODR8[n] clears the corresponding 4-mA enable bit. The change is effective on the second clock cycle after the write. 7:0 DRV4 R/W 0x00 182 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 13: GPIO 8-mA Drive Select (GPIODR8R), offset 0x508 The GPIODR8R register is the 8-mA drive control register. It allows for each GPIO signal in the port to be individually configured without affecting the other pads. When writing the DRV8 bit for a GPIO signal, the corresponding DRV2 bit in the GPIODR2R register and the DRV4 bit in the GPIODR4R register are automatically cleared by hardware. GPIO 8-mA Drive Select (GPIODR8R) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x508 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DRV8 Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Output Pad 8-mA Drive Enable A write of 1 to either GPIODR2[n] or GPIODR4[n] clears the corresponding 8-mA enable bit. The change is effective on the second clock cycle after the write. 7:0 DRV8 R/W 0x00 November 30, 2007 183 Preliminary LM3S6952 Microcontroller Register 14: GPIO Open Drain Select (GPIOODR), offset 0x50C The GPIOODR register is the open drain control register. Setting a bit in this register enables the open drain configuration of the corresponding GPIO pad. When open drain mode is enabled, the corresponding bit should also be set in the GPIO Digital Input Enable (GPIODEN) register (see page 188). Corresponding bits in the drive strength registers (GPIODR2R, GPIODR4R, GPIODR8R, and GPIOSLR ) can be set to achieve the desired rise and fall times. The GPIO acts as an open drain input if the corresponding bit in the GPIODIR register is set to 0; and as an open drain output when set to 1. When using the I2C module, the GPIO Alternate Function Select (GPIOAFSEL) register bit for PB2 and PB3 should be set to 1 (see examples in “Initialization and Configuration” on page 166). GPIO Open Drain Select (GPIOODR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x50C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ODE Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Output Pad Open Drain Enable The ODE values are defined as follows: Value Description 0 Open drain configuration is disabled. 1 Open drain configuration is enabled. 7:0 ODE R/W 0x00 184 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 15: GPIO Pull-Up Select (GPIOPUR), offset 0x510 The GPIOPUR register is the pull-up control register. When a bit is set to 1, it enables a weak pull-up resistor on the corresponding GPIO signal. Setting a bit in GPIOPUR automatically clears the corresponding bit in the GPIO Pull-Down Select (GPIOPDR) register (see page 186). GPIO Pull-Up Select (GPIOPUR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x510 Type R/W, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PUE Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Pad Weak Pull-Up Enable A write of 1 to GPIOPDR[n] clears the corresponding GPIOPUR[n] enables. The change is effective on the second clock cycle after the write. Note: The default reset value for the GPIOAFSEL, GPIOPUR, and GPIODEN registers are 0x0000.0000 for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins default to JTAG/SWD functionality. Because of this, the default reset value of these registers for GPIO Port B is 0x0000.0080 while the default reset value for Port C is 0x0000.000F. 7:0 PUE R/W - November 30, 2007 185 Preliminary LM3S6952 Microcontroller Register 16: GPIO Pull-Down Select (GPIOPDR), offset 0x514 The GPIOPDR register is the pull-down control register. When a bit is set to 1, it enables a weak pull-down resistor on the corresponding GPIO signal. Setting a bit in GPIOPDR automatically clears the corresponding bit in the GPIO Pull-Up Select (GPIOPUR) register (see page 185). GPIO Pull-Down Select (GPIOPDR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x514 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PDE Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Pad Weak Pull-Down Enable A write of 1 to GPIOPUR[n] clears the corresponding GPIOPDR[n] enables. The change is effective on the second clock cycle after the write. 7:0 PDE R/W 0x00 186 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 17: GPIO Slew Rate Control Select (GPIOSLR), offset 0x518 The GPIOSLR register is the slew rate control register. Slew rate control is only available when using the 8-mA drive strength option via the GPIO 8-mA Drive Select (GPIODR8R) register (see page 183). GPIO Slew Rate Control Select (GPIOSLR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x518 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SRL Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Slew Rate Limit Enable (8-mA drive only) The SRL values are defined as follows: Value Description 0 Slew rate control disabled. 1 Slew rate control enabled. 7:0 SRL R/W 0x00 November 30, 2007 187 Preliminary LM3S6952 Microcontroller Register 18: GPIO Digital Enable (GPIODEN), offset 0x51C The GPIODEN register is the digital enable register. By default, with the exception of the GPIO signals used for JTAG/SWD function, all other GPIO signals are configured out of reset to be undriven (tristate). Their digital function is disabled; they do not drive a logic value on the pin and they do not allow the pin voltage into the GPIO receiver. To use the pin in a digital function (either GPIO or alternate function), the corresponding GPIODEN bit must be set. GPIO Digital Enable (GPIODEN) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x51C Type R/W, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DEN Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Digital Enable The DEN values are defined as follows: Value Description 0 Digital functions disabled. 1 Digital functions enabled. Note: The default reset value for the GPIOAFSEL, GPIOPUR, and GPIODEN registers are 0x0000.0000 for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins default to JTAG/SWD functionality. Because of this, the default reset value of these registers for GPIO Port B is 0x0000.0080 while the default reset value for Port C is 0x0000.000F. 7:0 DEN R/W - 188 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 19: GPIO Lock (GPIOLOCK), offset 0x520 The GPIOLOCK register enables write access to the GPIOCR register (see page 190). Writing 0x1ACCE551 to the GPIOLOCK register will unlock the GPIOCR register. Writing any other value to the GPIOLOCK register re-enables the locked state. Reading the GPIOLOCK register returns the lock status rather than the 32-bit value that was previously written. Therefore, when write accesses are disabled, or locked, reading the GPIOLOCK register returns 0x00000001. When write accesses are enabled, or unlocked, reading the GPIOLOCK register returns 0x00000000. GPIO Lock (GPIOLOCK) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x520 Type R/W, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LOCK Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 LOCK Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description GPIO Lock A write of the value 0x1ACCE551 unlocks the GPIO Commit (GPIOCR) register for write access. A write of any other value reapplies the lock, preventing any register updates. A read of this register returns the following values: Value Description 0x0000.0001 locked 0x0000.0000 unlocked 31:0 LOCK R/W 0x0000.0001 November 30, 2007 189 Preliminary LM3S6952 Microcontroller Register 20: GPIO Commit (GPIOCR), offset 0x524 The GPIOCR register is the commit register. The value of the GPIOCR register determines which bits of the GPIOAFSEL register will be committed when a write to the GPIOAFSEL register is performed. If a bit in the GPIOCR register is a zero, the data being written to the corresponding bit in the GPIOAFSEL register will not be committed and will retain its previous value. If a bit in the GPIOCR register is a one, the data being written to the corresponding bit of the GPIOAFSEL register will be committed to the register and will reflect the new value. The contents of the GPIOCR register can only be modified if the GPIOLOCK register is unlocked. Writes to the GPIOCR register will be ignored if the GPIOLOCK register is locked. Important: This register is designed to prevent accidental programming of the GPIOAFSEL registers that control connectivity to the JTAG/SWD debug hardware. By initializing the bits of the GPIOCR register to 0 for PB7 and PC[3:0], the JTAG/SWD debug port can only be converted to GPIOs through a deliberate set of writes to the GPIOLOCK, GPIOCR, and GPIOAFSEL registers. Because this protection is currently only implemented on the JTAG/SWD pins on PB7 and PC[3:0], all of the other bits in the GPIOCR registers cannot be written with 0x0. These bits are hardwired to 0x1, ensuring that it is always possible to commit new values to the GPIOAFSEL register bits of these other pins. GPIO Commit (GPIOCR) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0x524 Type -, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CR Type RO RO RO RO RO RO RO RO - - - - - - - - Reset 0 0 0 0 0 0 0 0 - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 190 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Bit/Field Name Type Reset Description GPIO Commit On a bit-wise basis, any bit set allows the corresponding GPIOAFSEL bit to be set to its alternate function. Note: The default register type for the GPIOCR register is RO for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). These five pins are currently the only GPIOs that are protected by the GPIOCR register. Because of this, the register type for GPIO Port B7 and GPIO Port C[3:0] is R/W. The default reset value for the GPIOCR register is 0x0000.00FF for all GPIO pins, with the exception of the five JTAG/SWD pins (PB7 and PC[3:0]). To ensure that the JTAG port is not accidentally programmed as a GPIO, these five pins default to non-commitable. Because of this, the default reset value of GPIOCR for GPIO Port B is 0x0000.007F while the default reset value of GPIOCR for Port C is 0x0000.00F0. 7:0 CR - - November 30, 2007 191 Preliminary LM3S6952 Microcontroller Register 21: GPIO Peripheral Identification 4 (GPIOPeriphID4), offset 0xFD0 The GPIOPeriphID4, GPIOPeriphID5, GPIOPeriphID6, and GPIOPeriphID7 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 4 (GPIOPeriphID4) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFD0 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID4 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID4 RO 0x00 GPIO Peripheral ID Register[7:0] 192 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 22: GPIO Peripheral Identification 5 (GPIOPeriphID5), offset 0xFD4 The GPIOPeriphID4, GPIOPeriphID5, GPIOPeriphID6, and GPIOPeriphID7 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 5 (GPIOPeriphID5) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFD4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID5 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID5 RO 0x00 GPIO Peripheral ID Register[15:8] November 30, 2007 193 Preliminary LM3S6952 Microcontroller Register 23: GPIO Peripheral Identification 6 (GPIOPeriphID6), offset 0xFD8 The GPIOPeriphID4, GPIOPeriphID5, GPIOPeriphID6, and GPIOPeriphID7 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 6 (GPIOPeriphID6) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFD8 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID6 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID6 RO 0x00 GPIO Peripheral ID Register[23:16] 194 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 24: GPIO Peripheral Identification 7 (GPIOPeriphID7), offset 0xFDC The GPIOPeriphID4, GPIOPeriphID5, GPIOPeriphID6, and GPIOPeriphID7 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 7 (GPIOPeriphID7) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFDC Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID7 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID7 RO 0x00 GPIO Peripheral ID Register[31:24] November 30, 2007 195 Preliminary LM3S6952 Microcontroller Register 25: GPIO Peripheral Identification 0 (GPIOPeriphID0), offset 0xFE0 The GPIOPeriphID0, GPIOPeriphID1, GPIOPeriphID2, and GPIOPeriphID3 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 0 (GPIOPeriphID0) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFE0 Type RO, reset 0x0000.0061 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Peripheral ID Register[7:0] Can be used by software to identify the presence of this peripheral. 7:0 PID0 RO 0x61 196 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 26: GPIO Peripheral Identification 1 (GPIOPeriphID1), offset 0xFE4 The GPIOPeriphID0, GPIOPeriphID1, GPIOPeriphID2, and GPIOPeriphID3 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 1 (GPIOPeriphID1) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFE4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Peripheral ID Register[15:8] Can be used by software to identify the presence of this peripheral. 7:0 PID1 RO 0x00 November 30, 2007 197 Preliminary LM3S6952 Microcontroller Register 27: GPIO Peripheral Identification 2 (GPIOPeriphID2), offset 0xFE8 The GPIOPeriphID0, GPIOPeriphID1, GPIOPeriphID2, and GPIOPeriphID3 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 2 (GPIOPeriphID2) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFE8 Type RO, reset 0x0000.0018 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Peripheral ID Register[23:16] Can be used by software to identify the presence of this peripheral. 7:0 PID2 RO 0x18 198 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 28: GPIO Peripheral Identification 3 (GPIOPeriphID3), offset 0xFEC The GPIOPeriphID0, GPIOPeriphID1, GPIOPeriphID2, and GPIOPeriphID3 registers can conceptually be treated as one 32-bit register; each register contains eight bits of the 32-bit register, used by software to identify the peripheral. GPIO Peripheral Identification 3 (GPIOPeriphID3) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFEC Type RO, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO Peripheral ID Register[31:24] Can be used by software to identify the presence of this peripheral. 7:0 PID3 RO 0x01 November 30, 2007 199 Preliminary LM3S6952 Microcontroller Register 29: GPIO PrimeCell Identification 0 (GPIOPCellID0), offset 0xFF0 The GPIOPCellID0, GPIOPCellID1, GPIOPCellID2, and GPIOPCellID3 registers are four 8-bit wide registers, that can conceptually be treated as one 32-bit register. The register is used as a standard cross-peripheral identification system. GPIO PrimeCell Identification 0 (GPIOPCellID0) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFF0 Type RO, reset 0x0000.000D 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO PrimeCell ID Register[7:0] Provides software a standard cross-peripheral identification system. 7:0 CID0 RO 0x0D 200 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 30: GPIO PrimeCell Identification 1 (GPIOPCellID1), offset 0xFF4 The GPIOPCellID0, GPIOPCellID1, GPIOPCellID2, and GPIOPCellID3 registers are four 8-bit wide registers, that can conceptually be treated as one 32-bit register. The register is used as a standard cross-peripheral identification system. GPIO PrimeCell Identification 1 (GPIOPCellID1) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFF4 Type RO, reset 0x0000.00F0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO PrimeCell ID Register[15:8] Provides software a standard cross-peripheral identification system. 7:0 CID1 RO 0xF0 November 30, 2007 201 Preliminary LM3S6952 Microcontroller Register 31: GPIO PrimeCell Identification 2 (GPIOPCellID2), offset 0xFF8 The GPIOPCellID0, GPIOPCellID1, GPIOPCellID2, and GPIOPCellID3 registers are four 8-bit wide registers, that can conceptually be treated as one 32-bit register. The register is used as a standard cross-peripheral identification system. GPIO PrimeCell Identification 2 (GPIOPCellID2) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFF8 Type RO, reset 0x0000.0005 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO PrimeCell ID Register[23:16] Provides software a standard cross-peripheral identification system. 7:0 CID2 RO 0x05 202 November 30, 2007 Preliminary General-Purpose Input/Outputs (GPIOs) Register 32: GPIO PrimeCell Identification 3 (GPIOPCellID3), offset 0xFFC The GPIOPCellID0, GPIOPCellID1, GPIOPCellID2, and GPIOPCellID3 registers are four 8-bit wide registers, that can conceptually be treated as one 32-bit register. The register is used as a standard cross-peripheral identification system. GPIO PrimeCell Identification 3 (GPIOPCellID3) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 Offset 0xFFC Type RO, reset 0x0000.00B1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPIO PrimeCell ID Register[31:24] Provides software a standard cross-peripheral identification system. 7:0 CID3 RO 0xB1 November 30, 2007 203 Preliminary LM3S6952 Microcontroller 10 General-Purpose Timers Programmable timers can be used to count or time external events that drive the Timer input pins. The Stellaris® General-Purpose Timer Module (GPTM) contains three GPTM blocks (Timer0, Timer1, and Timer 2). Each GPTM block provides two 16-bit timers/counters (referred to as TimerA and TimerB) that can be configured to operate independently as timers or event counters, or configured to operate as one 32-bit timer or one 32-bit Real-Time Clock (RTC). Timers can also be used to trigger analog-to-digital (ADC) conversions. The trigger signals from all of the general-purpose timers are ORed together before reaching the ADC module, so only one timer should be used to trigger ADC events. Note: Timer2 is an internal timer and can only be used to generate internal interrupts or trigger ADC events. The General-Purpose Timer Module is one timing resource available on the Stellaris® microcontrollers. Other timer resources include the System Timer (SysTick) (see “System Timer (SysTick)” on page 40) and the PWM timer in the PWM module (see “PWM Timer” on page 466). The following modes are supported: ■ 32-bit Timer modes – Programmable one-shot timer – Programmable periodic timer – Real-Time Clock using 32.768-KHz input clock – Software-controlled event stalling (excluding RTC mode) ■ 16-bit Timer modes – General-purpose timer function with an 8-bit prescaler (for one-shot and periodic modes only) – Programmable one-shot timer – Programmable periodic timer – Software-controlled event stalling ■ 16-bit Input Capture modes – Input edge count capture – Input edge time capture ■ 16-bit PWM mode – Simple PWM mode with software-programmable output inversion of the PWM signal 10.1 Block Diagram Note: In Figure 10-1 on page 205, the specific CCP pins available depend on the Stellaris® device. See Table 10-1 on page 205 for the available CCPs. 204 November 30, 2007 Preliminary General-Purpose Timers Figure 10-1. GPTM Module Block Diagram TA Comparator TB Comparator GPTMTBR GPTMAR Clock / Edge Detect RTC Divider Clock / Edge Detect TimerA Interrupt TimerB Interrupt System Clock 0x0000 (Down Counter Modes) 0x0000 (Down Counter Modes) 32 KHz or Even CCP Pin Odd CCP Pin En En TimerA Control GPTMTAPMR GPTMTAILR GPTMTAMATCHR GPTMTAPR GPTMTAMR TimerB Control GPTMTBPMR GPTMTBILR GPTMTBMATCHR GPTMTBPR GPTMTBMR Interrupt / Config GPTMCFG GPTMRIS GPTMICR GPTMMIS GPTMIMR GPTMCTL Table 10-1. Available CCP Pins Timer 16-Bit Up/Down Counter Even CCP Pin Odd CCP Pin Timer 0 TimerA CCP0 - TimerB - CCP1 Timer 1 TimerA CCP2 - TimerB - CCP3 Timer 2 TimerA - - TimerB - - 10.2 Functional Description The main components of each GPTM block are two free-running 16-bit up/down counters (referred to as TimerA and TimerB), two 16-bit match registers, two prescaler match registers, and two 16-bit load/initialization registers and their associated control functions. The exact functionality of each GPTM is controlled by software and configured through the register interface. Software configures the GPTM using the GPTM Configuration (GPTMCFG) register (see page 216), the GPTM TimerA Mode (GPTMTAMR) register (see page 217), and the GPTM TimerB Mode (GPTMTBMR) register (see page 219). When in one of the 32-bit modes, the timer can only act as a 32-bit timer. However, when configured in 16-bit mode, the GPTM can have its two 16-bit timers configured in any combination of the 16-bit modes. 10.2.1 GPTM Reset Conditions After reset has been applied to the GPTM module, the module is in an inactive state, and all control registers are cleared and in their default states. Counters TimerA and TimerB are initialized to 0xFFFF, along with their corresponding load registers: the GPTM TimerA Interval Load November 30, 2007 205 Preliminary LM3S6952 Microcontroller (GPTMTAILR) register (see page 230) and the GPTM TimerB Interval Load (GPTMTBILR) register (see page 231). The prescale counters are initialized to 0x00: the GPTM TimerA Prescale (GPTMTAPR) register (see page 234) and the GPTM TimerB Prescale (GPTMTBPR) register (see page 235). 10.2.2 32-Bit Timer Operating Modes This section describes the three GPTM 32-bit timer modes (One-Shot, Periodic, and RTC) and their configuration. The GPTM is placed into 32-bit mode by writing a 0 (One-Shot/Periodic 32-bit timer mode) or a 1 (RTC mode) to the GPTM Configuration (GPTMCFG) register. In both configurations, certain GPTM registers are concatenated to form pseudo 32-bit registers. These registers include: ■ GPTM TimerA Interval Load (GPTMTAILR) register [15:0], see page 230 ■ GPTM TimerB Interval Load (GPTMTBILR) register [15:0], see page 231 ■ GPTM TimerA (GPTMTAR) register [15:0], see page 238 ■ GPTM TimerB (GPTMTBR) register [15:0], see page 239 In the 32-bit modes, the GPTM translates a 32-bit write access to GPTMTAILR into a write access to both GPTMTAILR and GPTMTBILR. The resulting word ordering for such a write operation is: GPTMTBILR[15:0]:GPTMTAILR[15:0] Likewise, a read access to GPTMTAR returns the value: GPTMTBR[15:0]:GPTMTAR[15:0] 10.2.2.1 32-Bit One-Shot/Periodic Timer Mode In 32-bit one-shot and periodic timer modes, the concatenated versions of the TimerA and TimerB registers are configured as a 32-bit down-counter. The selection of one-shot or periodic mode is determined by the value written to the TAMR field of the GPTM TimerA Mode (GPTMTAMR) register (see page 217), and there is no need to write to the GPTM TimerB Mode (GPTMTBMR) register. When software writes the TAEN bit in the GPTM Control (GPTMCTL) register (see page 221), the timer begins counting down from its preloaded value. Once the 0x0000.0000 state is reached, the timer reloads its start value from the concatenated GPTMTAILR on the next cycle. If configured to be a one-shot timer, the timer stops counting and clears the TAEN bit in the GPTMCTL register. If configured as a periodic timer, it continues counting. In addition to reloading the count value, the GPTM generates interrupts and output triggers when it reaches the 0x0000000 state. The GPTM sets the TATORIS bit in the GPTM Raw Interrupt Status (GPTMRIS) register (see page 226), and holds it until it is cleared by writing the GPTM Interrupt Clear (GPTMICR) register (see page 228). If the time-out interrupt is enabled in the GPTM Interrupt Mask (GPTIMR) register (see page 224), the GPTM also sets the TATOMIS bit in the GPTM Masked Interrupt Status (GPTMMIS) register (see page 227). The output trigger is a one-clock-cycle pulse that is asserted when the counter hits the 0x0000.0000 state, and deasserted on the following clock cycle. It is enabled by setting the TAOTE bit in GPTMCTL, and can trigger SoC-level events such as ADC conversions. If software reloads the GPTMTAILR register while the counter is running, the counter loads the new value on the next clock cycle and continues counting from the new value. 206 November 30, 2007 Preliminary General-Purpose Timers If the TASTALL bit in the GPTMCTL register is asserted, the timer freezes counting until the signal is deasserted. 10.2.2.2 32-Bit Real-Time Clock Timer Mode In Real-Time Clock (RTC) mode, the concatenated versions of the TimerA and TimerB registers are configured as a 32-bit up-counter. When RTC mode is selected for the first time, the counter is loaded with a value of 0x0000.0001. All subsequent load values must be written to the GPTM TimerA Match (GPTMTAMATCHR) register (see page 232) by the controller. The input clock on the CCP0, CCP2, or CCP4 pins is required to be 32.768 KHz in RTC mode. The clock signal is then divided down to a 1 Hz rate and is passed along to the input of the 32-bit counter. When software writes the TAEN bit inthe GPTMCTL register, the counter starts counting up from its preloaded value of 0x0000.0001. When the current count value matches the preloaded value in the GPTMTAMATCHR register, it rolls over to a value of 0x0000.0000 and continues counting until either a hardware reset, or it is disabled by software (clearing the TAEN bit). When a match occurs, the GPTM asserts the RTCRIS bit in GPTMRIS. If the RTC interrupt is enabled in GPTIMR, the GPTM also sets the RTCMIS bit in GPTMISR and generates a controller interrupt. The status flags are cleared by writing the RTCCINT bit in GPTMICR. If the TASTALL and/or TBSTALL bits in the GPTMCTL register are set, the timer does not freeze if the RTCEN bit is set in GPTMCTL. 10.2.3 16-Bit Timer Operating Modes The GPTM is placed into global 16-bit mode by writing a value of 0x4 to the GPTM Configuration (GPTMCFG) register (see page 216). This section describes each of the GPTM 16-bit modes of operation. TimerA and TimerB have identical modes, so a single description is given using an n to reference both. 10.2.3.1 16-Bit One-Shot/Periodic Timer Mode In 16-bit one-shot and periodic timer modes, the timer is configured as a 16-bit down-counter with an optional 8-bit prescaler that effectively extends the counting range of the timer to 24 bits. The selection of one-shot or periodic mode is determined by the value written to the TnMR field of the GPTMTnMR register. The optional prescaler is loaded into the GPTM Timern Prescale (GPTMTnPR) register. When software writes the TnEN bit in the GPTMCTL register, the timer begins counting down from its preloaded value. Once the 0x0000 state is reached, the timer reloads its start value from GPTMTnILR and GPTMTnPR on the next cycle. If configured to be a one-shot timer, the timer stops counting and clears the TnEN bit in the GPTMCTL register. If configured as a periodic timer, it continues counting. In addition to reloading the count value, the timer generates interrupts and output triggers when it reaches the 0x0000 state. The GPTM sets the TnTORIS bit in the GPTMRIS register, and holds it until it is cleared by writing the GPTMICR register. If the time-out interrupt is enabled in GPTIMR, the GPTM also sets the TnTOMIS bit in GPTMISR and generates a controller interrupt. The output trigger is a one-clock-cycle pulse that is asserted when the counter hits the 0x0000 state, and deasserted on the following clock cycle. It is enabled by setting the TnOTE bit in the GPTMCTL register, and can trigger SoC-level events such as ADC conversions. If software reloads the GPTMTAILR register while the counter is running, the counter loads the new value on the next clock cycle and continues counting from the new value. November 30, 2007 207 Preliminary LM3S6952 Microcontroller If the TnSTALL bit in the GPTMCTL register is enabled, the timer freezes counting until the signal is deasserted. The following example shows a variety of configurations for a 16-bit free running timer while using the prescaler. All values assume a 50-MHz clock with Tc=20 ns (clock period). Table 10-2. 16-Bit Timer With Prescaler Configurations Prescale #Clock (T c)a Max Time Units 00000000 1 1.3107 mS 00000001 2 2.6214 mS 00000010 3 3.9321 mS ------------ -- -- -- 11111100 254 332.9229 mS 11111110 255 334.2336 mS 11111111 256 335.5443 mS a. Tc is the clock period. 10.2.3.2 16-Bit Input Edge Count Mode In Edge Count mode, the timer is configured as a down-counter capable of capturing three types of events: rising edge, falling edge, or both. To place the timer in Edge Count mode, the TnCMR bit of the GPTMTnMR register must be set to 0. The type of edge that the timer counts is determined by the TnEVENT fields of the GPTMCTL register. During initialization, the GPTM Timern Match (GPTMTnMATCHR) register is configured so that the difference between the value in the GPTMTnILR register and the GPTMTnMATCHR register equals the number of edge events that must be counted. When software writes the TnEN bit in the GPTM Control (GPTMCTL) register, the timer is enabled for event capture. Each input event on the CCP pin decrements the counter by 1 until the event count matches GPTMTnMATCHR. When the counts match, the GPTM asserts the CnMRIS bit in the GPTMRIS register (and the CnMMIS bit, if the interrupt is not masked). The counter is then reloaded using the value in GPTMTnILR, and stopped since the GPTM automatically clears the TnEN bit in the GPTMCTL register. Once the event count has been reached, all further events are ignored until TnEN is re-enabled by software. Figure 10-2 on page 209 shows how input edge count mode works. In this case, the timer start value is set to GPTMnILR =0x000A and the match value is set to GPTMnMATCHR =0x0006 so that four edge events are counted. The counter is configured to detect both edges of the input signal. Note that the last two edges are not counted since the timer automatically clears the TnEN bit after the current count matches the value in the GPTMnMR register. 208 November 30, 2007 Preliminary General-Purpose Timers Figure 10-2. 16-Bit Input Edge Count Mode Example 0x000A 0x0006 0x0007 0x0008 0x0009 Input Signal Timer stops, flags asserted Timer reload Count on next cycle Ignored Ignored 10.2.3.3 16-Bit Input Edge Time Mode Note: The prescaler is not available in 16-Bit Input Edge Time mode. In Edge Time mode, the timer is configured as a free-running down-counter initialized to the value loaded in the GPTMTnILR register (or 0xFFFF at reset). This mode allows for event capture of both rising and falling edges. The timer is placed into Edge Time mode by setting the TnCMR bit in the GPTMTnMR register, and the type of event that the timer captures is determined by the TnEVENT fields of the GPTMCnTL register. When software writes the TnEN bit in the GPTMCTL register, the timer is enabled for event capture. When the selected input event is detected, the current Tn counter value is captured in the GPTMTnR register and is available to be read by the controller. The GPTM then asserts the CnERIS bit (and the CnEMIS bit, if the interrupt is not masked). After an event has been captured, the timer does not stop counting. It continues to count until the TnEN bit is cleared. When the timer reaches the 0x0000 state, it is reloaded with the value from the GPTMnILR register. Figure 10-3 on page 210 shows how input edge timing mode works. In the diagram, it is assumed that the start value of the timer is the default value of 0xFFFF, and the timer is configured to capture rising edge events. Each time a rising edge event is detected, the current count value is loaded into the GPTMTnR register, and is held there until another rising edge is detected (at which point the new count value is loaded into GPTMTnR). November 30, 2007 209 Preliminary LM3S6952 Microcontroller Figure 10-3. 16-Bit Input Edge Time Mode Example GPTMTnR=Y Input Signal Time Count GPTMTnR=X GPTMTnR=Z Z X Y 0xFFFF 10.2.3.4 16-Bit PWM Mode The GPTM supports a simple PWM generation mode. In PWM mode, the timer is configured as a down-counter with a start value (and thus period) defined by GPTMTnILR. PWM mode is enabled with the GPTMTnMR register by setting the TnAMS bit to 0x1, the TnCMR bit to 0x0, and the TnMR field to 0x2. When software writes the TnEN bit in the GPTMCTL register, the counter begins counting down until it reaches the 0x0000 state. On the next counter cycle, the counter reloads its start value from GPTMTnILR (and GPTMTnPR if using a prescaler) and continues counting until disabled by software clearing the TnEN bit in the GPTMCTL register. No interrupts or status bits are asserted in PWM mode. The output PWM signal asserts when the counter is at the value of the GPTMTnILR register (its start state), and is deasserted when the counter value equals the value in the GPTM Timern Match Register (GPTMnMATCHR). Software has the capability of inverting the output PWM signal by setting the TnPWML bit in the GPTMCTL register. Figure 10-4 on page 211 shows how to generate an output PWM with a 1-ms period and a 66% duty cycle assuming a 50-MHz input clock and TnPWML =0 (duty cycle would be 33% for the TnPWML =1 configuration). For this example, the start value is GPTMnIRL=0xC350 and the match value is GPTMnMR=0x411A. 210 November 30, 2007 Preliminary General-Purpose Timers Figure 10-4. 16-Bit PWM Mode Example Output Signal Time Count GPTMTnR=GPTMnMR GPTMTnR=GPTMnMR 0xC350 0x411A TnPWML = 0 TnPWML = 1 TnEN set 10.3 Initialization and Configuration To use the general-purpose timers, the peripheral clock must be enabled by setting the TIMER0, TIMER1, and TIMER2 bits in the RCGC1 register. This section shows module initialization and configuration examples for each of the supported timer modes. 10.3.1 32-Bit One-Shot/Periodic Timer Mode The GPTM is configured for 32-bit One-Shot and Periodic modes by the following sequence: 1. Ensure the timer is disabled (the TAEN bit in the GPTMCTL register is cleared) before making any changes. 2. Write the GPTM Configuration Register (GPTMCFG) with a value of 0x0. 3. Set the TAMR field in the GPTM TimerA Mode Register (GPTMTAMR): a. Write a value of 0x1 for One-Shot mode. b. Write a value of 0x2 for Periodic mode. 4. Load the start value into the GPTM TimerA Interval Load Register (GPTMTAILR). 5. If interrupts are required, set the TATOIM bit in the GPTM Interrupt Mask Register (GPTMIMR). 6. Set the TAEN bit in the GPTMCTL register to enable the timer and start counting. November 30, 2007 211 Preliminary LM3S6952 Microcontroller 7. Poll the TATORIS bit in the GPTMRIS register or wait for the interrupt to be generated (if enabled). In both cases, the status flags are cleared by writing a 1 to the TATOCINT bit of the GPTM Interrupt Clear Register (GPTMICR). In One-Shot mode, the timer stops counting after step 7 on page 212. To re-enable the timer, repeat the sequence. A timer configured in Periodic mode does not stop counting after it times out. 10.3.2 32-Bit Real-Time Clock (RTC) Mode To use the RTC mode, the timer must have a 32.768-KHz input signal on its CCP0, CCP2, or CCP4 pins. To enable the RTC feature, follow these steps: 1. Ensure the timer is disabled (the TAEN bit is cleared) before making any changes. 2. Write the GPTM Configuration Register (GPTMCFG) with a value of 0x1. 3. Write the desired match value to the GPTM TimerA Match Register (GPTMTAMATCHR). 4. Set/clear the RTCEN bit in the GPTM Control Register (GPTMCTL) as desired. 5. If interrupts are required, set the RTCIM bit in the GPTM Interrupt Mask Register (GPTMIMR). 6. Set the TAEN bit in the GPTMCTL register to enable the timer and start counting. When the timer count equals the value in the GPTMTAMATCHR register, the counter is re-loaded with 0x0000.0000 and begins counting. If an interrupt is enabled, it does not have to be cleared. 10.3.3 16-Bit One-Shot/Periodic Timer Mode A timer is configured for 16-bit One-Shot and Periodic modes by the following sequence: 1. Ensure the timer is disabled (the TnEN bit is cleared) before making any changes. 2. Write the GPTM Configuration Register (GPTMCFG) with a value of 0x4. 3. Set the TnMR field in the GPTM Timer Mode (GPTMTnMR) register: a. Write a value of 0x1 for One-Shot mode. b. Write a value of 0x2 for Periodic mode. 4. If a prescaler is to be used, write the prescale value to the GPTM Timern Prescale Register (GPTMTnPR). 5. Load the start value into the GPTM Timer Interval Load Register (GPTMTnILR). 6. If interrupts are required, set the TnTOIM bit in the GPTM Interrupt Mask Register (GPTMIMR). 7. Set the TnEN bit in the GPTM Control Register (GPTMCTL) to enable the timer and start counting. 8. Poll the TnTORIS bit in the GPTMRIS register or wait for the interrupt to be generated (if enabled). In both cases, the status flags are cleared by writing a 1 to the TnTOCINT bit of the GPTM Interrupt Clear Register (GPTMICR). 212 November 30, 2007 Preliminary General-Purpose Timers In One-Shot mode, the timer stops counting after step 8 on page 212. To re-enable the timer, repeat the sequence. A timer configured in Periodic mode does not stop counting after it times out. 10.3.4 16-Bit Input Edge Count Mode A timer is configured to Input Edge Count mode by the following sequence: 1. Ensure the timer is disabled (the TnEN bit is cleared) before making any changes. 2. Write the GPTM Configuration (GPTMCFG) register with a value of 0x4. 3. In the GPTM Timer Mode (GPTMTnMR) register, write the TnCMR field to 0x0 and the TnMR field to 0x3. 4. Configure the type of event(s) that the timer captures by writing the TnEVENT field of the GPTM Control (GPTMCTL) register. 5. Load the timer start value into the GPTM Timern Interval Load (GPTMTnILR) register. 6. Load the desired event count into the GPTM Timern Match (GPTMTnMATCHR) register. 7. If interrupts are required, set the CnMIM bit in the GPTM Interrupt Mask (GPTMIMR) register. 8. Set the TnEN bit in the GPTMCTL register to enable the timer and begin waiting for edge events. 9. Poll the CnMRIS bit in the GPTMRIS register or wait for the interrupt to be generated (if enabled). In both cases, the status flags are cleared by writing a 1 to the CnMCINT bit of the GPTM Interrupt Clear (GPTMICR) register. In Input Edge Count Mode, the timer stops after the desired number of edge events has been detected. To re-enable the timer, ensure that the TnEN bit is cleared and repeat step 4 on page 213 through step 9 on page 213. 10.3.5 16-Bit Input Edge Timing Mode A timer is configured to Input Edge Timing mode by the following sequence: 1. Ensure the timer is disabled (the TnEN bit is cleared) before making any changes. 2. Write the GPTM Configuration (GPTMCFG) register with a value of 0x4. 3. In the GPTM Timer Mode (GPTMTnMR) register, write the TnCMR field to 0x1 and the TnMR field to 0x3. 4. Configure the type of event that the timer captures by writing the TnEVENT field of the GPTM Control (GPTMCTL) register. 5. Load the timer start value into the GPTM Timern Interval Load (GPTMTnILR) register. 6. If interrupts are required, set the CnEIM bit in the GPTM Interrupt Mask (GPTMIMR) register. 7. Set the TnEN bit in the GPTM Control (GPTMCTL) register to enable the timer and start counting. 8. Poll the CnERIS bit in the GPTMRIS register or wait for the interrupt to be generated (if enabled). In both cases, the status flags are cleared by writing a 1 to the CnECINT bit of the GPTM November 30, 2007 213 Preliminary LM3S6952 Microcontroller Interrupt Clear (GPTMICR) register. The time at which the event happened can be obtained by reading the GPTM Timern (GPTMTnR) register. In Input Edge Timing mode, the timer continues running after an edge event has been detected, but the timer interval can be changed at any time by writing the GPTMTnILR register. The change takes effect at the next cycle after the write. 10.3.6 16-Bit PWM Mode A timer is configured to PWM mode using the following sequence: 1. Ensure the timer is disabled (the TnEN bit is cleared) before making any changes. 2. Write the GPTM Configuration (GPTMCFG) register with a value of 0x4. 3. In the GPTM Timer Mode (GPTMTnMR) register, set the TnAMS bit to 0x1, the TnCMR bit to 0x0, and the TnMR field to 0x2. 4. Configure the output state of the PWM signal (whether or not it is inverted) in the TnEVENT field of the GPTM Control (GPTMCTL) register. 5. Load the timer start value into the GPTM Timern Interval Load (GPTMTnILR) register. 6. Load the GPTM Timern Match (GPTMTnMATCHR) register with the desired value. 7. If a prescaler is going to be used, configure the GPTM Timern Prescale (GPTMTnPR) register and the GPTM Timern Prescale Match (GPTMTnPMR) register. 8. Set the TnEN bit in the GPTM Control (GPTMCTL) register to enable the timer and begin generation of the output PWM signal. In PWM Timing mode, the timer continues running after the PWM signal has been generated. The PWM period can be adjusted at any time by writing the GPTMTnILR register, and the change takes effect at the next cycle after the write. 10.4 Register Map Table 10-3 on page 214 lists the GPTM registers. The offset listed is a hexadecimal increment to the register’s address, relative to that timer’s base address: ■ Timer0: 0x4003.0000 ■ Timer1: 0x4003.1000 ■ Timer2: 0x4003.2000 Table 10-3. Timers Register Map See Offset Name Type Reset Description page 0x000 GPTMCFG R/W 0x0000.0000 GPTM Configuration 216 0x004 GPTMTAMR R/W 0x0000.0000 GPTM TimerA Mode 217 0x008 GPTMTBMR R/W 0x0000.0000 GPTM TimerB Mode 219 214 November 30, 2007 Preliminary General-Purpose Timers See Offset Name Type Reset Description page 0x00C GPTMCTL R/W 0x0000.0000 GPTM Control 221 0x018 GPTMIMR R/W 0x0000.0000 GPTM Interrupt Mask 224 0x01C GPTMRIS RO 0x0000.0000 GPTM Raw Interrupt Status 226 0x020 GPTMMIS RO 0x0000.0000 GPTM Masked Interrupt Status 227 0x024 GPTMICR W1C 0x0000.0000 GPTM Interrupt Clear 228 GPTM TimerA Interval Load 230 0x0000.FFFF (16-bit mode) 0xFFFF.FFFF (32-bit mode) 0x028 GPTMTAILR R/W 0x02C GPTMTBILR R/W 0x0000.FFFF GPTM TimerB Interval Load 231 GPTM TimerA Match 232 0x0000.FFFF (16-bit mode) 0xFFFF.FFFF (32-bit mode) 0x030 GPTMTAMATCHR R/W 0x034 GPTMTBMATCHR R/W 0x0000.FFFF GPTM TimerB Match 233 0x038 GPTMTAPR R/W 0x0000.0000 GPTM TimerA Prescale 234 0x03C GPTMTBPR R/W 0x0000.0000 GPTM TimerB Prescale 235 0x040 GPTMTAPMR R/W 0x0000.0000 GPTM TimerA Prescale Match 236 0x044 GPTMTBPMR R/W 0x0000.0000 GPTM TimerB Prescale Match 237 GPTM TimerA 238 0x0000.FFFF (16-bit mode) 0xFFFF.FFFF (32-bit mode) 0x048 GPTMTAR RO 0x04C GPTMTBR RO 0x0000.FFFF GPTM TimerB 239 10.5 Register Descriptions The remainder of this section lists and describes the GPTM registers, in numerical order by address offset. November 30, 2007 215 Preliminary LM3S6952 Microcontroller Register 1: GPTM Configuration (GPTMCFG), offset 0x000 This register configures the global operation of the GPTM module. The value written to this register determines whether the GPTM is in 32- or 16-bit mode. GPTM Configuration (GPTMCFG) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPTMCFG Type RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 GPTM Configuration The GPTMCFG values are defined as follows: Value Description 0x0 32-bit timer configuration. 0x1 32-bit real-time clock (RTC) counter configuration. 0x2 Reserved. 0x3 Reserved. 16-bit timer configuration, function is controlled by bits 1:0 of GPTMTAMR and GPTMTBMR. 0x4-0x7 2:0 GPTMCFG R/W 0x0 216 November 30, 2007 Preliminary General-Purpose Timers Register 2: GPTM TimerA Mode (GPTMTAMR), offset 0x004 This register configures the GPTM based on the configuration selected in the GPTMCFG register. When in 16-bit PWM mode, set the TAAMS bit to 0x1, the TACMR bit to 0x0, and the TAMR field to 0x2. GPTM TimerA Mode (GPTMTAMR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x004 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TAAMS TACMR TAMR Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 GPTM TimerA Alternate Mode Select The TAAMS values are defined as follows: Value Description 0 Capture mode is enabled. 1 PWM mode is enabled. Note: To enable PWM mode, you must also clear the TACMR bit and set the TAMR field to 0x2. 3 TAAMS R/W 0 GPTM TimerA Capture Mode The TACMR values are defined as follows: Value Description 0 Edge-Count mode. 1 Edge-Time mode. 2 TACMR R/W 0 November 30, 2007 217 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description GPTM TimerA Mode The TAMR values are defined as follows: Value Description 0x0 Reserved. 0x1 One-Shot Timer mode. 0x2 Periodic Timer mode. 0x3 Capture mode. The Timer mode is based on the timer configuration defined by bits 2:0 in the GPTMCFG register (16-or 32-bit). In 16-bit timer configuration, TAMR controls the 16-bit timer modes for TimerA. In 32-bit timer configuration, this register controls the mode and the contents of GPTMTBMR are ignored. 1:0 TAMR R/W 0x0 218 November 30, 2007 Preliminary General-Purpose Timers Register 3: GPTM TimerB Mode (GPTMTBMR), offset 0x008 This register configures the GPTM based on the configuration selected in the GPTMCFG register. When in 16-bit PWM mode, set the TBAMS bit to 0x1, the TBCMR bit to 0x0, and the TBMR field to 0x2. GPTM TimerB Mode (GPTMTBMR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TBAMS TBCMR TBMR Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 GPTM TimerB Alternate Mode Select The TBAMS values are defined as follows: Value Description 0 Capture mode is enabled. 1 PWM mode is enabled. Note: To enable PWM mode, you must also clear the TBCMR bit and set the TBMR field to 0x2. 3 TBAMS R/W 0 GPTM TimerB Capture Mode The TBCMR values are defined as follows: Value Description 0 Edge-Count mode. 1 Edge-Time mode. 2 TBCMR R/W 0 November 30, 2007 219 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description GPTM TimerB Mode The TBMR values are defined as follows: Value Description 0x0 Reserved. 0x1 One-Shot Timer mode. 0x2 Periodic Timer mode. 0x3 Capture mode. The timer mode is based on the timer configuration defined by bits 2:0 in the GPTMCFG register. In 16-bit timer configuration, these bits control the 16-bit timer modes for TimerB. In 32-bit timer configuration, this register’s contents are ignored and GPTMTAMR is used. 1:0 TBMR R/W 0x0 220 November 30, 2007 Preliminary General-Purpose Timers Register 4: GPTM Control (GPTMCTL), offset 0x00C This register is used alongside the GPTMCFG and GMTMTnMR registers to fine-tune the timer configuration, and to enable other features such as timer stall and the output trigger. The output trigger can be used to initiate transfers on the ADC module. GPTM Control (GPTMCTL) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x00C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TBPWML TBOTE reserved TBEVENT TBSTALL TBEN reserved TAPWML TAOTE RTCEN TAEVENT TASTALL TAEN Type RO R/W R/W RO R/W R/W R/W R/W RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:15 reserved RO 0x00 GPTM TimerB PWM Output Level The TBPWML values are defined as follows: Value Description 0 Output is unaffected. 1 Output is inverted. 14 TBPWML R/W 0 GPTM TimerB Output Trigger Enable The TBOTE values are defined as follows: Value Description 0 The output TimerB trigger is disabled. 1 The output TimerB trigger is enabled. 13 TBOTE R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12 reserved RO 0 November 30, 2007 221 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description GPTM TimerB Event Mode The TBEVENT values are defined as follows: Value Description 0x0 Positive edge. 0x1 Negative edge. 0x2 Reserved 0x3 Both edges. 11:10 TBEVENT R/W 0x0 GPTM TimerB Stall Enable The TBSTALL values are defined as follows: Value Description 0 TimerB stalling is disabled. 1 TimerB stalling is enabled. 9 TBSTALL R/W 0 GPTM TimerB Enable The TBEN values are defined as follows: Value Description 0 TimerB is disabled. TimerB is enabled and begins counting or the capture logic is enabled based on the GPTMCFG register. 1 8 TBEN R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 GPTM TimerA PWM Output Level The TAPWML values are defined as follows: Value Description 0 Output is unaffected. 1 Output is inverted. 6 TAPWML R/W 0 GPTM TimerA Output Trigger Enable The TAOTE values are defined as follows: Value Description 0 The output TimerA trigger is disabled. 1 The output TimerA trigger is enabled. 5 TAOTE R/W 0 222 November 30, 2007 Preliminary General-Purpose Timers Bit/Field Name Type Reset Description GPTM RTC Enable The RTCEN values are defined as follows: Value Description 0 RTC counting is disabled. 1 RTC counting is enabled. 4 RTCEN R/W 0 GPTM TimerA Event Mode The TAEVENT values are defined as follows: Value Description 0x0 Positive edge. 0x1 Negative edge. 0x2 Reserved 0x3 Both edges. 3:2 TAEVENT R/W 0x0 GPTM TimerA Stall Enable The TASTALL values are defined as follows: Value Description 0 TimerA stalling is disabled. 1 TimerA stalling is enabled. 1 TASTALL R/W 0 GPTM TimerA Enable The TAEN values are defined as follows: Value Description 0 TimerA is disabled. TimerA is enabled and begins counting or the capture logic is enabled based on the GPTMCFG register. 1 0 TAEN R/W 0 November 30, 2007 223 Preliminary LM3S6952 Microcontroller Register 5: GPTM Interrupt Mask (GPTMIMR), offset 0x018 This register allows software to enable/disable GPTM controller-level interrupts. Writing a 1 enables the interrupt, while writing a 0 disables it. GPTM Interrupt Mask (GPTMIMR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x018 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CBEIM CBMIM TBTOIM reserved RTCIM CAEIM CAMIM TATOIM Type RO RO RO RO RO R/W R/W R/W RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 GPTM CaptureB Event Interrupt Mask The CBEIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 10 CBEIM R/W 0 GPTM CaptureB Match Interrupt Mask The CBMIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 9 CBMIM R/W 0 GPTM TimerB Time-Out Interrupt Mask The TBTOIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 8 TBTOIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:4 reserved RO 0 224 November 30, 2007 Preliminary General-Purpose Timers Bit/Field Name Type Reset Description GPTM RTC Interrupt Mask The RTCIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 3 RTCIM R/W 0 GPTM CaptureA Event Interrupt Mask The CAEIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 2 CAEIM R/W 0 GPTM CaptureA Match Interrupt Mask The CAMIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 1 CAMIM R/W 0 GPTM TimerA Time-Out Interrupt Mask The TATOIM values are defined as follows: Value Description 0 Interrupt is disabled. 1 Interrupt is enabled. 0 TATOIM R/W 0 November 30, 2007 225 Preliminary LM3S6952 Microcontroller Register 6: GPTM Raw Interrupt Status (GPTMRIS), offset 0x01C This register shows the state of the GPTM's internal interrupt signal. These bits are set whether or not the interrupt is masked in the GPTMIMR register. Each bit can be cleared by writing a 1 to its corresponding bit in GPTMICR. GPTM Raw Interrupt Status (GPTMRIS) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x01C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CBERIS CBMRIS TBTORIS reserved RTCRIS CAERIS CAMRIS TATORIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 GPTM CaptureB Event Raw Interrupt This is the CaptureB Event interrupt status prior to masking. 10 CBERIS RO 0 GPTM CaptureB Match Raw Interrupt This is the CaptureB Match interrupt status prior to masking. 9 CBMRIS RO 0 GPTM TimerB Time-Out Raw Interrupt This is the TimerB time-out interrupt status prior to masking. 8 TBTORIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:4 reserved RO 0x0 GPTM RTC Raw Interrupt This is the RTC Event interrupt status prior to masking. 3 RTCRIS RO 0 GPTM CaptureA Event Raw Interrupt This is the CaptureA Event interrupt status prior to masking. 2 CAERIS RO 0 GPTM CaptureA Match Raw Interrupt This is the CaptureA Match interrupt status prior to masking. 1 CAMRIS RO 0 GPTM TimerA Time-Out Raw Interrupt This the TimerA time-out interrupt status prior to masking. 0 TATORIS RO 0 226 November 30, 2007 Preliminary General-Purpose Timers Register 7: GPTM Masked Interrupt Status (GPTMMIS), offset 0x020 This register show the state of the GPTM's controller-level interrupt. If an interrupt is unmasked in GPTMIMR, and there is an event that causes the interrupt to be asserted, the corresponding bit is set in this register. All bits are cleared by writing a 1 to the corresponding bit in GPTMICR. GPTM Masked Interrupt Status (GPTMMIS) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x020 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CBEMIS CBMMIS TBTOMIS reserved RTCMIS CAEMIS CAMMIS TATOMIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 GPTM CaptureB Event Masked Interrupt This is the CaptureB event interrupt status after masking. 10 CBEMIS RO 0 GPTM CaptureB Match Masked Interrupt This is the CaptureB match interrupt status after masking. 9 CBMMIS RO 0 GPTM TimerB Time-Out Masked Interrupt This is the TimerB time-out interrupt status after masking. 8 TBTOMIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:4 reserved RO 0x0 GPTM RTC Masked Interrupt This is the RTC event interrupt status after masking. 3 RTCMIS RO 0 GPTM CaptureA Event Masked Interrupt This is the CaptureA event interrupt status after masking. 2 CAEMIS RO 0 GPTM CaptureA Match Masked Interrupt This is the CaptureA match interrupt status after masking. 1 CAMMIS RO 0 GPTM TimerA Time-Out Masked Interrupt This is the TimerA time-out interrupt status after masking. 0 TATOMIS RO 0 November 30, 2007 227 Preliminary LM3S6952 Microcontroller Register 8: GPTM Interrupt Clear (GPTMICR), offset 0x024 This register is used to clear the status bits in the GPTMRIS and GPTMMIS registers. Writing a 1 to a bit clears the corresponding bit in the GPTMRIS and GPTMMIS registers. GPTM Interrupt Clear (GPTMICR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x024 Type W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CBECINT CBMCINT TBTOCINT reserved RTCCINT CAECINT CAMCINT TATOCINT Type RO RO RO RO RO W1C W1C W1C RO RO RO RO W1C W1C W1C W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 GPTM CaptureB Event Interrupt Clear The CBECINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 10 CBECINT W1C 0 GPTM CaptureB Match Interrupt Clear The CBMCINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 9 CBMCINT W1C 0 GPTM TimerB Time-Out Interrupt Clear The TBTOCINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 8 TBTOCINT W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:4 reserved RO 0x0 228 November 30, 2007 Preliminary General-Purpose Timers Bit/Field Name Type Reset Description GPTM RTC Interrupt Clear The RTCCINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 3 RTCCINT W1C 0 GPTM CaptureA Event Interrupt Clear The CAECINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 2 CAECINT W1C 0 GPTM CaptureA Match Raw Interrupt This is the CaptureA match interrupt status after masking. 1 CAMCINT W1C 0 GPTM TimerA Time-Out Raw Interrupt The TATOCINT values are defined as follows: Value Description 0 The interrupt is unaffected. 1 The interrupt is cleared. 0 TATOCINT W1C 0 November 30, 2007 229 Preliminary LM3S6952 Microcontroller Register 9: GPTM TimerA Interval Load (GPTMTAILR), offset 0x028 This register is used to load the starting count value into the timer. When GPTM is configured to one of the 32-bit modes, GPTMTAILR appears as a 32-bit register (the upper 16-bits correspond to the contents of the GPTM TimerB Interval Load (GPTMTBILR) register). In 16-bit mode, the upper 16 bits of this register read as 0s and have no effect on the state of GPTMTBILR. GPTM TimerA Interval Load (GPTMTAILR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x028 Type R/W, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 TAILRH Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 1 1 0 1 0 1 1 1 1 0 1 1 1 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TAILRL Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description GPTM TimerA Interval Load Register High When configured for 32-bit mode via the GPTMCFG register, the GPTM TimerB Interval Load (GPTMTBILR) register loads this value on a write. A read returns the current value of GPTMTBILR. In 16-bit mode, this field reads as 0 and does not have an effect on the state of GPTMTBILR. 0xFFFF (32-bit mode) 0x0000 (16-bit mode) 31:16 TAILRH R/W GPTM TimerA Interval Load Register Low For both 16- and 32-bit modes, writing this field loads the counter for TimerA. A read returns the current value of GPTMTAILR. 15:0 TAILRL R/W 0xFFFF 230 November 30, 2007 Preliminary General-Purpose Timers Register 10: GPTM TimerB Interval Load (GPTMTBILR), offset 0x02C This register is used to load the starting count value into TimerB. When the GPTM is configured to a 32-bit mode, GPTMTBILR returns the current value of TimerB and ignores writes. GPTM TimerB Interval Load (GPTMTBILR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x02C Type R/W, reset 0x0000.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TBILRL Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0000 GPTM TimerB Interval Load Register When the GPTM is not configured as a 32-bit timer, a write to this field updates GPTMTBILR. In 32-bit mode, writes are ignored, and reads return the current value of GPTMTBILR. 15:0 TBILRL R/W 0xFFFF November 30, 2007 231 Preliminary LM3S6952 Microcontroller Register 11: GPTM TimerA Match (GPTMTAMATCHR), offset 0x030 This register is used in 32-bit Real-Time Clock mode and 16-bit PWM and Input Edge Count modes. GPTM TimerA Match (GPTMTAMATCHR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x030 Type R/W, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 TAMRH Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 1 1 0 1 0 1 1 1 1 0 1 1 1 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TAMRL Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description GPTM TimerA Match Register High When configured for 32-bit Real-Time Clock (RTC) mode via the GPTMCFG register, this value is compared to the upper half of GPTMTAR, to determine match events. In 16-bit mode, this field reads as 0 and does not have an effect on the state of GPTMTBMATCHR. 0xFFFF (32-bit mode) 0x0000 (16-bit mode) 31:16 TAMRH R/W GPTM TimerA Match Register Low When configured for 32-bit Real-Time Clock (RTC) mode via the GPTMCFG register, this value is compared to the lower half of GPTMTAR, to determine match events. When configured for PWM mode, this value along with GPTMTAILR, determines the duty cycle of the output PWM signal. When configured for Edge Count mode, this value along with GPTMTAILR, determines how many edge events are counted. The total number of edge events counted is equal to the value in GPTMTAILR minus this value. 15:0 TAMRL R/W 0xFFFF 232 November 30, 2007 Preliminary General-Purpose Timers Register 12: GPTM TimerB Match (GPTMTBMATCHR), offset 0x034 This register is used in 32-bit Real-Time Clock mode and 16-bit PWM and Input Edge Count modes. GPTM TimerB Match (GPTMTBMATCHR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x034 Type R/W, reset 0x0000.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TBMRL Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0000 GPTM TimerB Match Register Low When configured for PWM mode, this value along with GPTMTBILR, determines the duty cycle of the output PWM signal. When configured for Edge Count mode, this value along with GPTMTBILR, determines how many edge events are counted. The total number of edge events counted is equal to the value in GPTMTBILR minus this value. 15:0 TBMRL R/W 0xFFFF November 30, 2007 233 Preliminary LM3S6952 Microcontroller Register 13: GPTM TimerA Prescale (GPTMTAPR), offset 0x038 This register allows software to extend the range of the 16-bit timers when operating in one-shot or periodic mode. GPTM TimerA Prescale (GPTMTAPR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x038 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TAPSR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPTM TimerA Prescale The register loads this value on a write. A read returns the current value of the register. Refer to Table 10-2 on page 208 for more details and an example. 7:0 TAPSR R/W 0x00 234 November 30, 2007 Preliminary General-Purpose Timers Register 14: GPTM TimerB Prescale (GPTMTBPR), offset 0x03C This register allows software to extend the range of the 16-bit timers when operating in one-shot or periodic mode. GPTM TimerB Prescale (GPTMTBPR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x03C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TBPSR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPTM TimerB Prescale The register loads this value on a write. A read returns the current value of this register. Refer to Table 10-2 on page 208 for more details and an example. 7:0 TBPSR R/W 0x00 November 30, 2007 235 Preliminary LM3S6952 Microcontroller Register 15: GPTM TimerA Prescale Match (GPTMTAPMR), offset 0x040 This register effectively extends the range of GPTMTAMATCHR to 24 bits when operating in 16-bit one-shot or periodic mode. GPTM TimerA Prescale Match (GPTMTAPMR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x040 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TAPSMR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPTM TimerA Prescale Match This value is used alongside GPTMTAMATCHR to detect timer match events while using a prescaler. 7:0 TAPSMR R/W 0x00 236 November 30, 2007 Preliminary General-Purpose Timers Register 16: GPTM TimerB Prescale Match (GPTMTBPMR), offset 0x044 This register effectively extends the range of GPTMTBMATCHR to 24 bits when operating in 16-bit one-shot or periodic mode. GPTM TimerB Prescale Match (GPTMTBPMR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x044 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TBPSMR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 GPTM TimerB Prescale Match This value is used alongside GPTMTBMATCHR to detect timer match events while using a prescaler. 7:0 TBPSMR R/W 0x00 November 30, 2007 237 Preliminary LM3S6952 Microcontroller Register 17: GPTM TimerA (GPTMTAR), offset 0x048 This register shows the current value of the TimerA counter in all cases except for Input Edge Count mode. When in this mode, this register contains the time at which the last edge event took place. GPTM TimerA (GPTMTAR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x048 Type RO, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 TARH Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 1 0 1 0 1 1 1 1 0 1 1 1 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TARL Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description GPTM TimerA Register High If the GPTMCFG is in a 32-bit mode, TimerB value is read. If the GPTMCFG is in a 16-bit mode, this is read as zero. 0xFFFF (32-bit mode) 0x0000 (16-bit mode) 31:16 TARH RO GPTM TimerA Register Low A read returns the current value of the GPTM TimerA Count Register, except in Input Edge Count mode, when it returns the timestamp from the last edge event. 15:0 TARL RO 0xFFFF 238 November 30, 2007 Preliminary General-Purpose Timers Register 18: GPTM TimerB (GPTMTBR), offset 0x04C This register shows the current value of the TimerB counter in all cases except for Input Edge Count mode. When in this mode, this register contains the time at which the last edge event took place. GPTM TimerB (GPTMTBR) Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 Offset 0x04C Type RO, reset 0x0000.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TBRL Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0000 GPTM TimerB A read returns the current value of the GPTM TimerB Count Register, except in Input Edge Count mode, when it returns the timestamp from the last edge event. 15:0 TBRL RO 0xFFFF November 30, 2007 239 Preliminary LM3S6952 Microcontroller 11 Watchdog Timer A watchdog timer can generate nonmaskable interrupts (NMIs) or a reset when a time-out value is reached. The watchdog timer is used to regain control when a system has failed due to a software error or due to the failure of an external device to respond in the expected way. The Stellaris® Watchdog Timer module consists of a 32-bit down counter, a programmable load register, interrupt generation logic, a locking register, and user-enabled stalling. The Watchdog Timer can be configured to generate an interrupt to the controller on its first time-out, and to generate a reset signal on its second time-out. Once the Watchdog Timer has been configured, the lock register can be written to prevent the timer configuration from being inadvertently altered. 11.1 Block Diagram Figure 11-1. WDT Module Block Diagram Control / Clock / Interrupt Generation WDTCTL WDTICR WDTRIS WDTMIS WDTLOCK WDTTEST WDTLOAD WDTVALUE Comparator 32-Bit Down Counter 0x00000000 Interrupt System Clock Identification Registers WDTPCellID0 WDTPeriphID0 WDTPeriphID4 WDTPCellID1 WDTPeriphID1 WDTPeriphID5 WDTPCellID2 WDTPeriphID2 WDTPeriphID6 WDTPCellID3 WDTPeriphID3 WDTPeriphID7 11.2 Functional Description The Watchdog Timer module generates the first time-out signal when the 32-bit counter reaches the zero state after being enabled; enabling the counter also enables the watchdog timer interrupt. After the first time-out event, the 32-bit counter is re-loaded with the value of the Watchdog Timer Load (WDTLOAD) register, and the timer resumes counting down from that value. Once the 240 November 30, 2007 Preliminary Watchdog Timer Watchdog Timer has been configured, the Watchdog Timer Lock (WDTLOCK) register is written, which prevents the timer configuration from being inadvertently altered by software. If the timer counts down to its zero state again before the first time-out interrupt is cleared, and the reset signal has been enabled (via the WatchdogResetEnable function), the Watchdog timer asserts its reset signal to the system. If the interrupt is cleared before the 32-bit counter reaches its second time-out, the 32-bit counter is loaded with the value in the WDTLOAD register, and counting resumes from that value. If WDTLOAD is written with a new value while the Watchdog Timer counter is counting, then the counter is loaded with the new value and continues counting. Writing to WDTLOAD does not clear an active interrupt. An interrupt must be specifically cleared by writing to the Watchdog Interrupt Clear (WDTICR) register. The Watchdog module interrupt and reset generation can be enabled or disabled as required. When the interrupt is re-enabled, the 32-bit counter is preloaded with the load register value and not its last state. 11.3 Initialization and Configuration To use the WDT, its peripheral clock must be enabled by setting the WDT bit in the RCGC0 register. The Watchdog Timer is configured using the following sequence: 1. Load the WDTLOAD register with the desired timer load value. 2. If the Watchdog is configured to trigger system resets, set the RESEN bit in the WDTCTL register. 3. Set the INTEN bit in the WDTCTL register to enable the Watchdog and lock the control register. If software requires that all of the watchdog registers are locked, the Watchdog Timer module can be fully locked by writing any value to the WDTLOCK register. To unlock the Watchdog Timer, write a value of 0x1ACC.E551. 11.4 Register Map Table 11-1 on page 241 lists the Watchdog registers. The offset listed is a hexadecimal increment to the register’s address, relative to the Watchdog Timer base address of 0x4000.0000. Table 11-1. Watchdog Timer Register Map See Offset Name Type Reset Description page 0x000 WDTLOAD R/W 0xFFFF.FFFF Watchdog Load 243 0x004 WDTVALUE RO 0xFFFF.FFFF Watchdog Value 244 0x008 WDTCTL R/W 0x0000.0000 Watchdog Control 245 0x00C WDTICR WO - Watchdog Interrupt Clear 246 0x010 WDTRIS RO 0x0000.0000 Watchdog Raw Interrupt Status 247 0x014 WDTMIS RO 0x0000.0000 Watchdog Masked Interrupt Status 248 0x418 WDTTEST R/W 0x0000.0000 Watchdog Test 249 0xC00 WDTLOCK R/W 0x0000.0000 Watchdog Lock 250 November 30, 2007 241 Preliminary LM3S6952 Microcontroller See Offset Name Type Reset Description page 0xFD0 WDTPeriphID4 RO 0x0000.0000 Watchdog Peripheral Identification 4 251 0xFD4 WDTPeriphID5 RO 0x0000.0000 Watchdog Peripheral Identification 5 252 0xFD8 WDTPeriphID6 RO 0x0000.0000 Watchdog Peripheral Identification 6 253 0xFDC WDTPeriphID7 RO 0x0000.0000 Watchdog Peripheral Identification 7 254 0xFE0 WDTPeriphID0 RO 0x0000.0005 Watchdog Peripheral Identification 0 255 0xFE4 WDTPeriphID1 RO 0x0000.0018 Watchdog Peripheral Identification 1 256 0xFE8 WDTPeriphID2 RO 0x0000.0018 Watchdog Peripheral Identification 2 257 0xFEC WDTPeriphID3 RO 0x0000.0001 Watchdog Peripheral Identification 3 258 0xFF0 WDTPCellID0 RO 0x0000.000D Watchdog PrimeCell Identification 0 259 0xFF4 WDTPCellID1 RO 0x0000.00F0 Watchdog PrimeCell Identification 1 260 0xFF8 WDTPCellID2 RO 0x0000.0005 Watchdog PrimeCell Identification 2 261 0xFFC WDTPCellID3 RO 0x0000.00B1 Watchdog PrimeCell Identification 3 262 11.5 Register Descriptions The remainder of this section lists and describes the WDT registers, in numerical order by address offset. 242 November 30, 2007 Preliminary Watchdog Timer Register 1: Watchdog Load (WDTLOAD), offset 0x000 This register is the 32-bit interval value used by the 32-bit counter. When this register is written, the value is immediately loaded and the counter restarts counting down from the new value. If the WDTLOAD register is loaded with 0x0000.0000, an interrupt is immediately generated. Watchdog Load (WDTLOAD) Base 0x4000.0000 Offset 0x000 Type R/W, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 WDTLoad Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 WDTLoad Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description 31:0 WDTLoad R/W 0xFFFF.FFFF Watchdog Load Value November 30, 2007 243 Preliminary LM3S6952 Microcontroller Register 2: Watchdog Value (WDTVALUE), offset 0x004 This register contains the current count value of the timer. Watchdog Value (WDTVALUE) Base 0x4000.0000 Offset 0x004 Type RO, reset 0xFFFF.FFFF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 WDTValue Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 WDTValue Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Watchdog Value Current value of the 32-bit down counter. 31:0 WDTValue RO 0xFFFF.FFFF 244 November 30, 2007 Preliminary Watchdog Timer Register 3: Watchdog Control (WDTCTL), offset 0x008 This register is the watchdog control register. The watchdog timer can be configured to generate a reset signal (on second time-out) or an interrupt on time-out. When the watchdog interrupt has been enabled, all subsequent writes to the control register are ignored. The only mechanism that can re-enable writes is a hardware reset. Watchdog Control (WDTCTL) Base 0x4000.0000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RESEN INTEN Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Watchdog Reset Enable The RESEN values are defined as follows: Value Description 0 Disabled. 1 Enable the Watchdog module reset output. 1 RESEN R/W 0 Watchdog Interrupt Enable The INTEN values are defined as follows: Value Description Interrupt event disabled (once this bit is set, it can only be cleared by a hardware reset). 0 1 Interrupt event enabled. Once enabled, all writes are ignored. 0 INTEN R/W 0 November 30, 2007 245 Preliminary LM3S6952 Microcontroller Register 4: Watchdog Interrupt Clear (WDTICR), offset 0x00C This register is the interrupt clear register. A write of any value to this register clears the Watchdog interrupt and reloads the 32-bit counter from the WDTLOAD register. Value for a read or reset is indeterminate. Watchdog Interrupt Clear (WDTICR) Base 0x4000.0000 Offset 0x00C Type WO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 WDTIntClr Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset - - - - - - - - - - - - - - - - 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 WDTIntClr Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset - - - - - - - - - - - - - - - - Bit/Field Name Type Reset Description 31:0 WDTIntClr WO - Watchdog Interrupt Clear 246 November 30, 2007 Preliminary Watchdog Timer Register 5: Watchdog Raw Interrupt Status (WDTRIS), offset 0x010 This register is the raw interrupt status register. Watchdog interrupt events can be monitored via this register if the controller interrupt is masked. Watchdog Raw Interrupt Status (WDTRIS) Base 0x4000.0000 Offset 0x010 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved WDTRIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Watchdog Raw Interrupt Status Gives the raw interrupt state (prior to masking) of WDTINTR. 0 WDTRIS RO 0 November 30, 2007 247 Preliminary LM3S6952 Microcontroller Register 6: Watchdog Masked Interrupt Status (WDTMIS), offset 0x014 This register is the masked interrupt status register. The value of this register is the logical AND of the raw interrupt bit and the Watchdog interrupt enable bit. Watchdog Masked Interrupt Status (WDTMIS) Base 0x4000.0000 Offset 0x014 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved WDTMIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Watchdog Masked Interrupt Status Gives the masked interrupt state (after masking) of the WDTINTR interrupt. 0 WDTMIS RO 0 248 November 30, 2007 Preliminary Watchdog Timer Register 7: Watchdog Test (WDTTEST), offset 0x418 This register provides user-enabled stalling when the microcontroller asserts the CPU halt flag during debug. Watchdog Test (WDTTEST) Base 0x4000.0000 Offset 0x418 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved STALL reserved Type RO RO RO RO RO RO RO R/W RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:9 reserved RO 0x00 Watchdog Stall Enable When set to 1, if the Stellaris® microcontroller is stopped with a debugger, the watchdog timer stops counting. Once the microcontroller is restarted, the watchdog timer resumes counting. 8 STALL R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:0 reserved RO 0x00 November 30, 2007 249 Preliminary LM3S6952 Microcontroller Register 8: Watchdog Lock (WDTLOCK), offset 0xC00 Writing 0x1ACC.E551 to the WDTLOCK register enables write access to all other registers. Writing any other value to the WDTLOCK register re-enables the locked state for register writes to all the other registers. Reading the WDTLOCK register returns the lock status rather than the 32-bit value written. Therefore, when write accesses are disabled, reading the WDTLOCK register returns 0x0000.0001 (when locked; otherwise, the returned value is 0x0000.0000 (unlocked)). Watchdog Lock (WDTLOCK) Base 0x4000.0000 Offset 0xC00 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 WDTLock Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 WDTLock Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Watchdog Lock A write of the value 0x1ACC.E551 unlocks the watchdog registers for write access. A write of any other value reapplies the lock, preventing any register updates. A read of this register returns the following values: Value Description 0x0000.0001 Locked 0x0000.0000 Unlocked 31:0 WDTLock R/W 0x0000 250 November 30, 2007 Preliminary Watchdog Timer Register 9: Watchdog Peripheral Identification 4 (WDTPeriphID4), offset 0xFD0 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 4 (WDTPeriphID4) Base 0x4000.0000 Offset 0xFD0 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID4 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID4 RO 0x00 WDT Peripheral ID Register[7:0] November 30, 2007 251 Preliminary LM3S6952 Microcontroller Register 10: Watchdog Peripheral Identification 5 (WDTPeriphID5), offset 0xFD4 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 5 (WDTPeriphID5) Base 0x4000.0000 Offset 0xFD4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID5 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID5 RO 0x00 WDT Peripheral ID Register[15:8] 252 November 30, 2007 Preliminary Watchdog Timer Register 11: Watchdog Peripheral Identification 6 (WDTPeriphID6), offset 0xFD8 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 6 (WDTPeriphID6) Base 0x4000.0000 Offset 0xFD8 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID6 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID6 RO 0x00 WDT Peripheral ID Register[23:16] November 30, 2007 253 Preliminary LM3S6952 Microcontroller Register 12: Watchdog Peripheral Identification 7 (WDTPeriphID7), offset 0xFDC The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 7 (WDTPeriphID7) Base 0x4000.0000 Offset 0xFDC Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID7 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID7 RO 0x00 WDT Peripheral ID Register[31:24] 254 November 30, 2007 Preliminary Watchdog Timer Register 13: Watchdog Peripheral Identification 0 (WDTPeriphID0), offset 0xFE0 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 0 (WDTPeriphID0) Base 0x4000.0000 Offset 0xFE0 Type RO, reset 0x0000.0005 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID0 RO 0x05 Watchdog Peripheral ID Register[7:0] November 30, 2007 255 Preliminary LM3S6952 Microcontroller Register 14: Watchdog Peripheral Identification 1 (WDTPeriphID1), offset 0xFE4 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 1 (WDTPeriphID1) Base 0x4000.0000 Offset 0xFE4 Type RO, reset 0x0000.0018 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID1 RO 0x18 Watchdog Peripheral ID Register[15:8] 256 November 30, 2007 Preliminary Watchdog Timer Register 15: Watchdog Peripheral Identification 2 (WDTPeriphID2), offset 0xFE8 The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 2 (WDTPeriphID2) Base 0x4000.0000 Offset 0xFE8 Type RO, reset 0x0000.0018 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID2 RO 0x18 Watchdog Peripheral ID Register[23:16] November 30, 2007 257 Preliminary LM3S6952 Microcontroller Register 16: Watchdog Peripheral Identification 3 (WDTPeriphID3), offset 0xFEC The WDTPeriphIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog Peripheral Identification 3 (WDTPeriphID3) Base 0x4000.0000 Offset 0xFEC Type RO, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 PID3 RO 0x01 Watchdog Peripheral ID Register[31:24] 258 November 30, 2007 Preliminary Watchdog Timer Register 17: Watchdog PrimeCell Identification 0 (WDTPCellID0), offset 0xFF0 The WDTPCellIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog PrimeCell Identification 0 (WDTPCellID0) Base 0x4000.0000 Offset 0xFF0 Type RO, reset 0x0000.000D 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 CID0 RO 0x0D Watchdog PrimeCell ID Register[7:0] November 30, 2007 259 Preliminary LM3S6952 Microcontroller Register 18: Watchdog PrimeCell Identification 1 (WDTPCellID1), offset 0xFF4 The WDTPCellIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog PrimeCell Identification 1 (WDTPCellID1) Base 0x4000.0000 Offset 0xFF4 Type RO, reset 0x0000.00F0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 CID1 RO 0xF0 Watchdog PrimeCell ID Register[15:8] 260 November 30, 2007 Preliminary Watchdog Timer Register 19: Watchdog PrimeCell Identification 2 (WDTPCellID2), offset 0xFF8 The WDTPCellIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog PrimeCell Identification 2 (WDTPCellID2) Base 0x4000.0000 Offset 0xFF8 Type RO, reset 0x0000.0005 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 CID2 RO 0x05 Watchdog PrimeCell ID Register[23:16] November 30, 2007 261 Preliminary LM3S6952 Microcontroller Register 20: Watchdog PrimeCell Identification 3 (WDTPCellID3 ), offset 0xFFC The WDTPCellIDn registers are hard-coded and the fields within the register determine the reset value. Watchdog PrimeCell Identification 3 (WDTPCellID3) Base 0x4000.0000 Offset 0xFFC Type RO, reset 0x0000.00B1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 7:0 CID3 RO 0xB1 Watchdog PrimeCell ID Register[31:24] 262 November 30, 2007 Preliminary Watchdog Timer 12 Analog-to-Digital Converter (ADC) An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a discrete digital number. The Stellaris® ADC module features 10-bit conversion resolution and supports three input channels, plus an internal temperature sensor. The ADC module contains a programmable sequencer which allows for the sampling of multiple analog input sources without controller intervention. Each sample sequence provides flexible programming with fully configurable input source, trigger events, interrupt generation, and sequence priority. The Stellaris® ADC provides the following features: ■ Three analog input channels ■ Single-ended and differential-input configurations ■ Internal temperature sensor ■ Sample rate of 500 thousand samples/second ■ Four programmable sample conversion sequences from one to eight entries long, with corresponding conversion result FIFOs ■ Flexible trigger control – Controller (software) – Timers – Analog Comparators – PWM – GPIO ■ Hardware averaging of up to 64 samples for improved accuracy November 30, 2007 263 Preliminary LM3S6952 Microcontroller 12.1 Block Diagram Figure 12-1. ADC Module Block Diagram Analog-to-Digital Converter ADCSSFIFO0 ADCSSFIFO1 ADCSSFIFO2 ADCSSFIFO3 FIFO Block ADCSSFSTAT0 ADCSSCTL0 ADCSSMUX0 Sample Sequencer 0 ADCSSFSTAT1 ADCSSCTL1 ADCSSMUX1 Sample Sequencer 1 ADCSSFSTAT2 ADCSSCTL2 ADCSSMUX2 Sample Sequencer 2 ADCSSFSTAT3 ADCSSCTL3 ADCSSMUX3 Sample Sequencer 3 ADCUSTAT ADCOSTAT ADCACTSS Control/Status ADCSSPRI ADCISC ADCRIS ADCIM Interrupt Control SS0 Interrupt Analog Inputs SS1 Interrupt SS2 Interrupt SS3 Interrupt ADCEMUX ADCPSSI Trigger Events SS0 SS1 SS2 SS3 Comparator GPIO (PB4) Timer PWM Comparator GPIO (PB4) Timer PWM Comparator GPIO (PB4) Timer PWM Comparator GPIO (PB4) Timer PWM Hardware Averager ADCSAC 12.2 Functional Description The Stellaris® ADC collects sample data by using a programmable sequence-based approach instead of the traditional single or double-sampling approach found on many ADC modules. Each sample sequence is a fully programmed series of consecutive (back-to-back) samples, allowing the ADC to collect data from multiple input sources without having to be re-configured or serviced by the controller. The programming of each sample in the sample sequence includes parameters such as the input source and mode (differential versus single-ended input), interrupt generation on sample completion, and the indicator for the last sample in the sequence. 12.2.1 Sample Sequencers The sampling control and data capture is handled by the Sample Sequencers. All of the sequencers are identical in implementation except for the number of samples that can be captured and the depth of the FIFO. Table 12-1 on page 264 shows the maximum number of samples that each Sequencer can capture and its corresponding FIFO depth. In this implementation, each FIFO entry is a 32-bit word, with the lower 10 bits containing the conversion result. Table 12-1. Samples and FIFO Depth of Sequencers Sequencer Number of Samples Depth of FIFO SS3 1 1 SS2 4 4 SS1 4 4 SS0 8 8 264 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) For a given sample sequence, each sample is defined by two 4-bit nibbles in the ADC Sample Sequence Input Multiplexer Select (ADCSSMUXn) and ADC Sample Sequence Control (ADCSSCTLn) registers, where "n" corresponds to the sequence number. The ADCSSMUXn nibbles select the input pin, while the ADCSSCTLn nibbles contain the sample control bits corresponding to parameters such as temperature sensor selection, interrupt enable, end of sequence, and differential input mode. Sample Sequencers are enabled by setting the respective ASENn bit in the ADC Active Sample Sequencer (ADCACTSS) register, but can be configured before being enabled. When configuring a sample sequence, multiple uses of the same input pin within the same sequence is allowed. In the ADCSSCTLn register, the Interrupt Enable (IE) bits can be set for any combination of samples, allowing interrupts to be generated after every sample in the sequence if necessary. Also, the END bit can be set at any point within a sample sequence. For example, if Sequencer 0 is used, the END bit can be set in the nibble associated with the fifth sample, allowing Sequencer 0 to complete execution of the sample sequence after the fifth sample. After a sample sequence completes execution, the result data can be retrieved from the ADC Sample Sequence Result FIFO (ADCSSFIFOn) registers. The FIFOs are simple circular buffers that read a single address to "pop" result data. For software debug purposes, the positions of the FIFO head and tail pointers are visible in the ADC Sample Sequence FIFO Status (ADCSSFSTATn) registers along with FULL and EMPTY status flags. Overflow and underflow conditions are monitored using the ADCOSTAT and ADCUSTAT registers. 12.2.2 Module Control Outside of the Sample Sequencers, the remainder of the control logic is responsible for tasks such as interrupt generation, sequence prioritization, and trigger configuration. Most of the ADC control logic runs at the ADC clock rate of 14-18 MHz. The internal ADC divider is configured automatically by hardware when the system XTAL is selected. The automatic clock divider configuration targets 16.667 MHz operation for all Stellaris® devices. 12.2.2.1 Interrupts The Sample Sequencers dictate the events that cause interrupts, but they don't have control over whether the interrupt is actually sent to the interrupt controller. The ADC module's interrupt signal is controlled by the state of the MASK bits in the ADC Interrupt Mask (ADCIM) register. Interrupt status can be viewed at two locations: the ADC Raw Interrupt Status (ADCRIS) register, which shows the raw status of a Sample Sequencer's interrupt signal, and the ADC Interrupt Status and Clear (ADCISC) register, which shows the logical AND of the ADCRIS register’s INR bit and the ADCIM register’s MASK bits. Interrupts are cleared by writing a 1 to the corresponding IN bit in ADCISC. 12.2.2.2 Prioritization When sampling events (triggers) happen concurrently, they are prioritized for processing by the values in the ADC Sample Sequencer Priority (ADCSSPRI) register. Valid priority values are in the range of 0-3, with 0 being the highest priority and 3 being the lowest. Multiple active Sample Sequencer units with the same priority do not provide consistent results, so software must ensure that all active Sample Sequencer units have a unique priority value. 12.2.2.3 Sampling Events Sample triggering for each Sample Sequencer is defined in the ADC Event Multiplexer Select (ADCEMUX) register. The external peripheral triggering sources vary by Stellaris® family member, November 30, 2007 265 Preliminary LM3S6952 Microcontroller but all devices share the "Controller" and "Always" triggers. Software can initiate sampling by setting the CH bits in the ADC Processor Sample Sequence Initiate (ADCPSSI) register. When using the "Always" trigger, care must be taken. If a sequence's priority is too high, it is possible to starve other lower priority sequences. 12.2.3 Hardware Sample Averaging Circuit Higher precision results can be generated using the hardware averaging circuit, however, the improved results are at the cost of throughput. Up to 64 samples can be accumulated and averaged to form a single data entry in the sequencer FIFO. Throughput is decreased proportionally to the number of samples in the averaging calculation. For example, if the averaging circuit is configured to average 16 samples, the throughput is decreased by a factor of 16. By default the averaging circuit is off and all data from the converter passes through to the sequencer FIFO. The averaging hardware is controlled by the ADC Sample Averaging Control (ADCSAC) register (see page 281). There is a single averaging circuit and all input channels receive the same amount of averaging whether they are single-ended or differential. 12.2.4 Analog-to-Digital Converter The converter itself generates a 10-bit output value for selected analog input. Special analog pads are used to minimize the distortion on the input. 12.2.5 Test Modes There is a user-available test mode that allows for loopback operation within the digital portion of the ADC module. This can be useful for debugging software without having to provide actual analog stimulus. This mode is available through the ADC Test Mode Loopback (ADCTMLB) register (see page 294). 12.2.6 Internal Temperature Sensor The internal temperature sensor provides an analog temperature reading as well as a reference voltage. The voltage at the output terminal SENSO is given by the following equation: SENSO = 2.7 - ((T + 55) / 75) This relation is shown in Figure 12-2 on page 267. 266 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Figure 12-2. Internal Temperature Sensor Characteristic 12.3 Initialization and Configuration In order for the ADC module to be used, the PLL must be enabled and using a supported crystal frequency (see the RCC register). Using unsupported frequencies can cause faulty operation in the ADC module. 12.3.1 Module Initialization Initialization of the ADC module is a simple process with very few steps. The main steps include enabling the clock to the ADC and reconfiguring the Sample Sequencer priorities (if needed). The initialization sequence for the ADC is as follows: 1. Enable the ADC clock by writing a value of 0x0001.0000 to the RCGC1 register (see page 100). 2. If required by the application, reconfigure the Sample Sequencer priorities in the ADCSSPRI register. The default configuration has Sample Sequencer 0 with the highest priority, and Sample Sequencer 3 as the lowest priority. 12.3.2 Sample Sequencer Configuration Configuration of the Sample Sequencers is slightly more complex than the module initialization since each sample sequence is completely programmable. The configuration for each Sample Sequencer should be as follows: 1. Ensure that the Sample Sequencer is disabled by writing a 0 to the corresponding ASEN bit in the ADCACTSS register. Programming of the Sample Sequencers is allowed without having them enabled. Disabling the Sequencer during programming prevents erroneous execution if a trigger event were to occur during the configuration process. 2. Configure the trigger event for the Sample Sequencer in the ADCEMUX register. 3. For each sample in the sample sequence, configure the corresponding input source in the ADCSSMUXn register. November 30, 2007 267 Preliminary LM3S6952 Microcontroller 4. For each sample in the sample sequence, configure the sample control bits in the corresponding nibble in the ADCSSCTLn register. When programming the last nibble, ensure that the END bit is set. Failure to set the END bit causes unpredictable behavior. 5. If interrupts are to be used, write a 1 to the corresponding MASK bit in the ADCIM register. 6. Enable the Sample Sequencer logic by writing a 1 to the corresponding ASEN bit in the ADCACTSS register. 12.4 Register Map Table 12-2 on page 268 lists the ADC registers. The offset listed is a hexadecimal increment to the register’s address, relative to the ADC base address of 0x4003.8000. Table 12-2. ADC Register Map See Offset Name Type Reset Description page 0x000 ADCACTSS R/W 0x0000.0000 ADC Active Sample Sequencer 270 0x004 ADCRIS RO 0x0000.0000 ADC Raw Interrupt Status 271 0x008 ADCIM R/W 0x0000.0000 ADC Interrupt Mask 272 0x00C ADCISC R/W1C 0x0000.0000 ADC Interrupt Status and Clear 273 0x010 ADCOSTAT R/W1C 0x0000.0000 ADC Overflow Status 274 0x014 ADCEMUX R/W 0x0000.0000 ADC Event Multiplexer Select 275 0x018 ADCUSTAT R/W1C 0x0000.0000 ADC Underflow Status 278 0x020 ADCSSPRI R/W 0x0000.3210 ADC Sample Sequencer Priority 279 0x028 ADCPSSI WO - ADC Processor Sample Sequence Initiate 280 0x030 ADCSAC R/W 0x0000.0000 ADC Sample Averaging Control 281 0x040 ADCSSMUX0 R/W 0x0000.0000 ADC Sample Sequence Input Multiplexer Select 0 282 0x044 ADCSSCTL0 R/W 0x0000.0000 ADC Sample Sequence Control 0 284 0x048 ADCSSFIFO0 RO 0x0000.0000 ADC Sample Sequence Result FIFO 0 287 0x04C ADCSSFSTAT0 RO 0x0000.0100 ADC Sample Sequence FIFO 0 Status 288 0x060 ADCSSMUX1 R/W 0x0000.0000 ADC Sample Sequence Input Multiplexer Select 1 289 0x064 ADCSSCTL1 R/W 0x0000.0000 ADC Sample Sequence Control 1 290 0x068 ADCSSFIFO1 RO 0x0000.0000 ADC Sample Sequence Result FIFO 1 287 0x06C ADCSSFSTAT1 RO 0x0000.0100 ADC Sample Sequence FIFO 1 Status 288 0x080 ADCSSMUX2 R/W 0x0000.0000 ADC Sample Sequence Input Multiplexer Select 2 289 0x084 ADCSSCTL2 R/W 0x0000.0000 ADC Sample Sequence Control 2 290 0x088 ADCSSFIFO2 RO 0x0000.0000 ADC Sample Sequence Result FIFO 2 287 0x08C ADCSSFSTAT2 RO 0x0000.0100 ADC Sample Sequence FIFO 2 Status 288 0x0A0 ADCSSMUX3 R/W 0x0000.0000 ADC Sample Sequence Input Multiplexer Select 3 292 268 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) See Offset Name Type Reset Description page 0x0A4 ADCSSCTL3 R/W 0x0000.0002 ADC Sample Sequence Control 3 293 0x0A8 ADCSSFIFO3 RO 0x0000.0000 ADC Sample Sequence Result FIFO 3 287 0x0AC ADCSSFSTAT3 RO 0x0000.0100 ADC Sample Sequence FIFO 3 Status 288 0x100 ADCTMLB R/W 0x0000.0000 ADC Test Mode Loopback 294 12.5 Register Descriptions The remainder of this section lists and describes the ADC registers, in numerical order by address offset. November 30, 2007 269 Preliminary LM3S6952 Microcontroller Register 1: ADC Active Sample Sequencer (ADCACTSS), offset 0x000 This register controls the activation of the Sample Sequencers. Each Sample Sequencer can be enabled/disabled independently. ADC Active Sample Sequencer (ADCACTSS) Base 0x4003.8000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ASEN3 ASEN2 ASEN1 ASEN0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 ADC SS3 Enable Specifies whether Sample Sequencer 3 is enabled. If set, the sample sequence logic for Sequencer 3 is active. Otherwise, the Sequencer is inactive. 3 ASEN3 R/W 0 ADC SS2 Enable Specifies whether Sample Sequencer 2 is enabled. If set, the sample sequence logic for Sequencer 2 is active. Otherwise, the Sequencer is inactive. 2 ASEN2 R/W 0 ADC SS1 Enable Specifies whether Sample Sequencer 1 is enabled. If set, the sample sequence logic for Sequencer 1 is active. Otherwise, the Sequencer is inactive. 1 ASEN1 R/W 0 ADC SS0 Enable Specifies whether Sample Sequencer 0 is enabled. If set, the sample sequence logic for Sequencer 0 is active. Otherwise, the Sequencer is inactive. 0 ASEN0 R/W 0 270 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 2: ADC Raw Interrupt Status (ADCRIS), offset 0x004 This register shows the status of the raw interrupt signal of each Sample Sequencer. These bits may be polled by software to look for interrupt conditions without having to generate controller interrupts. ADC Raw Interrupt Status (ADCRIS) Base 0x4003.8000 Offset 0x004 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved INR3 INR2 INR1 INR0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SS3 Raw Interrupt Status Set by hardware when a sample with its respective ADCSSCTL3 IE bit has completed conversion. This bit is cleared by writing a 1 to the ADCISC IN3 bit. 3 INR3 RO 0 SS2 Raw Interrupt Status Set by hardware when a sample with its respective ADCSSCTL2 IE bit has completed conversion. This bit is cleared by writing a 1 to the ADCISC IN2 bit. 2 INR2 RO 0 SS1 Raw Interrupt Status Set by hardware when a sample with its respective ADCSSCTL1 IE bit has completed conversion. This bit is cleared by writing a 1 to the ADCISC IN1 bit. 1 INR1 RO 0 SS0 Raw Interrupt Status Set by hardware when a sample with its respective ADCSSCTL0 IE bit has completed conversion. This bit is cleared by writing a 1 to the ADCISC IN0 bit. 0 INR0 RO 0 November 30, 2007 271 Preliminary LM3S6952 Microcontroller Register 3: ADC Interrupt Mask (ADCIM), offset 0x008 This register controls whether the Sample Sequencer raw interrupt signals are promoted to controller interrupts. The raw interrupt signal for each Sample Sequencer can be masked independently. ADC Interrupt Mask (ADCIM) Base 0x4003.8000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MASK3 MASK2 MASK1 MASK0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SS3 Interrupt Mask Specifies whether the raw interrupt signal from Sample Sequencer 3 (ADCRIS register INR3 bit) is promoted to a controller interrupt. If set, the raw interrupt signal is promoted to a controller interrupt. Otherwise, it is not. 3 MASK3 R/W 0 SS2 Interrupt Mask Specifies whether the raw interrupt signal from Sample Sequencer 2 (ADCRIS register INR2 bit) is promoted to a controller interrupt. If set, the raw interrupt signal is promoted to a controller interrupt. Otherwise, it is not. 2 MASK2 R/W 0 SS1 Interrupt Mask Specifies whether the raw interrupt signal from Sample Sequencer 1 (ADCRIS register INR1 bit) is promoted to a controller interrupt. If set, the raw interrupt signal is promoted to a controller interrupt. Otherwise, it is not. 1 MASK1 R/W 0 SS0 Interrupt Mask Specifies whether the raw interrupt signal from Sample Sequencer 0 (ADCRIS register INR0 bit) is promoted to a controller interrupt. If set, the raw interrupt signal is promoted to a controller interrupt. Otherwise, it is not. 0 MASK0 R/W 0 272 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 4: ADC Interrupt Status and Clear (ADCISC), offset 0x00C This register provides the mechanism for clearing interrupt conditions, and shows the status of controller interrupts generated by the Sample Sequencers. When read, each bit field is the logical AND of the respective INR and MASK bits. Interrupts are cleared by writing a 1 to the corresponding bit position. If software is polling the ADCRIS instead of generating interrupts, the INR bits are still cleared via the ADCISC register, even if the IN bit is not set. ADC Interrupt Status and Clear (ADCISC) Base 0x4003.8000 Offset 0x00C Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IN3 IN2 IN1 IN0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SS3 Interrupt Status and Clear This bit is set by hardware when the MASK3 and INR3 bits are both 1, providing a level-based interrupt to the controller. It is cleared by writing a 1, and also clears the INR3 bit. 3 IN3 R/W1C 0 SS2 Interrupt Status and Clear This bit is set by hardware when the MASK2 and INR2 bits are both 1, providing a level based interrupt to the controller. It is cleared by writing a 1, and also clears the INR2 bit. 2 IN2 R/W1C 0 SS1 Interrupt Status and Clear This bit is set by hardware when the MASK1 and INR1 bits are both 1, providing a level based interrupt to the controller. It is cleared by writing a 1, and also clears the INR1 bit. 1 IN1 R/W1C 0 SS0 Interrupt Status and Clear This bit is set by hardware when the MASK0 and INR0 bits are both 1, providing a level based interrupt to the controller. It is cleared by writing a 1, and also clears the INR0 bit. 0 IN0 R/W1C 0 November 30, 2007 273 Preliminary LM3S6952 Microcontroller Register 5: ADC Overflow Status (ADCOSTAT), offset 0x010 This register indicates overflow conditions in the Sample Sequencer FIFOs. Once the overflow condition has been handled by software, the condition can be cleared by writing a 1 to the corresponding bit position. ADC Overflow Status (ADCOSTAT) Base 0x4003.8000 Offset 0x010 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OV3 OV2 OV1 OV0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SS3 FIFO Overflow This bit specifies that the FIFO for Sample Sequencer 3 has hit an overflow condition where the FIFO is full and a write was requested. When an overflow is detected, the most recent write is dropped and this bit is set by hardware to indicate the occurrence of dropped data. This bit is cleared by writing a 1. 3 OV3 R/W1C 0 SS2 FIFO Overflow This bit specifies that the FIFO for Sample Sequencer 2 has hit an overflow condition where the FIFO is full and a write was requested. When an overflow is detected, the most recent write is dropped and this bit is set by hardware to indicate the occurrence of dropped data. This bit is cleared by writing a 1. 2 OV2 R/W1C 0 SS1 FIFO Overflow This bit specifies that the FIFO for Sample Sequencer 1 has hit an overflow condition where the FIFO is full and a write was requested. When an overflow is detected, the most recent write is dropped and this bit is set by hardware to indicate the occurrence of dropped data. This bit is cleared by writing a 1. 1 OV1 R/W1C 0 SS0 FIFO Overflow This bit specifies that the FIFO for Sample Sequencer 0 has hit an overflow condition where the FIFO is full and a write was requested. When an overflow is detected, the most recent write is dropped and this bit is set by hardware to indicate the occurrence of dropped data. This bit is cleared by writing a 1. 0 OV0 R/W1C 0 274 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 6: ADC Event Multiplexer Select (ADCEMUX), offset 0x014 The ADCEMUX selects the event (trigger) that initiates sampling for each Sample Sequencer. Each Sample Sequencer can be configured with a unique trigger source. ADC Event Multiplexer Select (ADCEMUX) Base 0x4003.8000 Offset 0x014 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 EM3 EM2 EM1 EM0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 SS3 Trigger Select This field selects the trigger source for Sample Sequencer 3. The valid configurations for this field are: Value Event 0x0 Controller (default) 0x1 Analog Comparator 0 0x2 Analog Comparator 1 0x3 Analog Comparator 2 0x4 External (GPIO PB4) 0x5 Timer 0x6 PWM0 0x7 PWM1 0x8 PWM2 0x9-0xE reserved 0xF Always (continuously sample) 15:12 EM3 R/W 0x00 November 30, 2007 275 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description SS2 Trigger Select This field selects the trigger source for Sample Sequencer 2. The valid configurations for this field are: Value Event 0x0 Controller (default) 0x1 Analog Comparator 0 0x2 Analog Comparator 1 0x3 Analog Comparator 2 0x4 External (GPIO PB4) 0x5 Timer 0x6 PWM0 0x7 PWM1 0x8 PWM2 0x9-0xE reserved 0xF Always (continuously sample) 11:8 EM2 R/W 0x00 SS1 Trigger Select This field selects the trigger source for Sample Sequencer 1. The valid configurations for this field are: Value Event 0x0 Controller (default) 0x1 Analog Comparator 0 0x2 Analog Comparator 1 0x3 Analog Comparator 2 0x4 External (GPIO PB4) 0x5 Timer 0x6 PWM0 0x7 PWM1 0x8 PWM2 0x9-0xE reserved 0xF Always (continuously sample) 7:4 EM1 R/W 0x00 276 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Bit/Field Name Type Reset Description SS0 Trigger Select This field selects the trigger source for Sample Sequencer 0. The valid configurations for this field are: Value Event 0x0 Controller (default) 0x1 Analog Comparator 0 0x2 Analog Comparator 1 0x3 Analog Comparator 2 0x4 External (GPIO PB4) 0x5 Timer 0x6 PWM0 0x7 PWM1 0x8 PWM2 0x9-0xE reserved 0xF Always (continuously sample) 3:0 EM0 R/W 0x00 November 30, 2007 277 Preliminary LM3S6952 Microcontroller Register 7: ADC Underflow Status (ADCUSTAT), offset 0x018 This register indicates underflow conditions in the Sample Sequencer FIFOs. The corresponding underflow condition can be cleared by writing a 1 to the relevant bit position. ADC Underflow Status (ADCUSTAT) Base 0x4003.8000 Offset 0x018 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved UV3 UV2 UV1 UV0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SS3 FIFO Underflow This bit specifies that the FIFO for Sample Sequencer 3 has hit an underflow condition where the FIFO is empty and a read was requested. The problematic read does not move the FIFO pointers, and 0s are returned. This bit is cleared by writing a 1. 3 UV3 R/W1C 0 SS2 FIFO Underflow This bit specifies that the FIFO for Sample Sequencer 2 has hit an underflow condition where the FIFO is empty and a read was requested. The problematic read does not move the FIFO pointers, and 0s are returned. This bit is cleared by writing a 1. 2 UV2 R/W1C 0 SS1 FIFO Underflow This bit specifies that the FIFO for Sample Sequencer 1 has hit an underflow condition where the FIFO is empty and a read was requested. The problematic read does not move the FIFO pointers, and 0s are returned. This bit is cleared by writing a 1. 1 UV1 R/W1C 0 SS0 FIFO Underflow This bit specifies that the FIFO for Sample Sequencer 0 has hit an underflow condition where the FIFO is empty and a read was requested. The problematic read does not move the FIFO pointers, and 0s are returned. This bit is cleared by writing a 1. 0 UV0 R/W1C 0 278 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 8: ADC Sample Sequencer Priority (ADCSSPRI), offset 0x020 This register sets the priority for each of the Sample Sequencers. Out of reset, Sequencer 0 has the highest priority, and sample sequence 3 has the lowest priority. When reconfiguring sequence priorities, each sequence must have a unique priority or the ADC behavior is inconsistent. ADC Sample Sequencer Priority (ADCSSPRI) Base 0x4003.8000 Offset 0x020 Type R/W, reset 0x0000.3210 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SS3 reserved SS2 reserved SS1 reserved SS0 Type RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W Reset 0 0 1 1 0 0 1 0 0 0 0 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:14 reserved RO 0x00 SS3 Priority The SS3 field contains a binary-encoded value that specifies the priority encoding of Sample Sequencer 3. A priority encoding of 0 is highest and 3 is lowest. The priorities assigned to the Sequencers must be uniquely mapped. ADC behavior is not consistent if two or more fields are equal. 13:12 SS3 R/W 0x3 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:10 reserved RO 0x0 SS2 Priority The SS2 field contains a binary-encoded value that specifies the priority encoding of Sample Sequencer 2. 9:8 SS2 R/W 0x2 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:6 reserved RO 0x0 SS1 Priority The SS1 field contains a binary-encoded value that specifies the priority encoding of Sample Sequencer 1. 5:4 SS1 R/W 0x1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0x0 SS0 Priority The SS0 field contains a binary-encoded value that specifies the priority encoding of Sample Sequencer 0. 1:0 SS0 R/W 0x0 November 30, 2007 279 Preliminary LM3S6952 Microcontroller Register 9: ADC Processor Sample Sequence Initiate (ADCPSSI), offset 0x028 This register provides a mechanism for application software to initiate sampling in the Sample Sequencers. Sample sequences can be initiated individually or in any combination. When multiple sequences are triggered simultaneously, the priority encodings in ADCSSPRI dictate execution order. ADC Processor Sample Sequence Initiate (ADCPSSI) Base 0x4003.8000 Offset 0x028 Type WO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset - - - - - - - - - - - - - - - - 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SS3 SS2 SS1 SS0 Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset - - - - - - - - - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved WO - SS3 Initiate Only a write by software is valid; a read of the register returns no meaningful data. When set by software, sampling is triggered on Sample Sequencer 3, assuming the Sequencer is enabled in the ADCACTSS register. 3 SS3 WO - SS2 Initiate Only a write by software is valid; a read of the register returns no meaningful data. When set by software, sampling is triggered on Sample Sequencer 2, assuming the Sequencer is enabled in the ADCACTSS register. 2 SS2 WO - SS1 Initiate Only a write by software is valid; a read of the register returns no meaningful data. When set by software, sampling is triggered on Sample Sequencer 1, assuming the Sequencer is enabled in the ADCACTSS register. 1 SS1 WO - SS0 Initiate Only a write by software is valid; a read of the register returns no meaningful data. When set by software, sampling is triggered on Sample Sequencer 0, assuming the Sequencer is enabled in the ADCACTSS register. 0 SS0 WO - 280 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 10: ADC Sample Averaging Control (ADCSAC), offset 0x030 This register controls the amount of hardware averaging applied to conversion results. The final conversion result stored in the FIFO is averaged from 2 AVG consecutive ADC samples at the specified ADC speed. If AVG is 0, the sample is passed directly through without any averaging. If AVG=6, then 64 consecutive ADC samples are averaged to generate one result in the sequencer FIFO. An AVG = 7 provides unpredictable results. ADC Sample Averaging Control (ADCSAC) Base 0x4003.8000 Offset 0x030 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved AVG Type RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 Hardware Averaging Control Specifies the amount of hardware averaging that will be applied to ADC samples. The AVG field can be any value between 0 and 6. Entering a value of 7 creates unpredictable results. Value Description 0x0 No hardware oversampling 0x1 2x hardware oversampling 0x2 4x hardware oversampling 0x3 8x hardware oversampling 0x4 16x hardware oversampling 0x5 32x hardware oversampling 0x6 64x hardware oversampling 0x7 Reserved 2:0 AVG R/W 0x0 November 30, 2007 281 Preliminary LM3S6952 Microcontroller Register 11: ADC Sample Sequence Input Multiplexer Select 0 (ADCSSMUX0), offset 0x040 This register defines the analog input configuration for each sample in a sequence executed with Sample Sequencer 0. This register is 32-bits wide and contains information for eight possible samples. ADC Sample Sequence Input Multiplexer Select 0 (ADCSSMUX0) Base 0x4003.8000 Offset 0x040 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved MUX7 reserved MUX6 reserved MUX5 reserved MUX4 Type RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MUX3 reserved MUX2 reserved MUX1 reserved MUX0 Type RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:30 reserved RO 0 8th Sample Input Select The MUX7 field is used during the eighth sample of a sequence executed with the Sample Sequencer. It specifies which of the analog inputs is sampled for the analog-to-digital conversion. The value set here indicates the corresponding pin, for example, a value of 1 indicates the input is ADC1. 29:28 MUX7 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:26 reserved RO 0 7th Sample Input Select The MUX6 field is used during the seventh sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 25:24 MUX6 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:22 reserved RO 0 6th Sample Input Select The MUX5 field is used during the sixth sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 21:20 MUX5 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 19:18 reserved RO 0 282 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Bit/Field Name Type Reset Description 5th Sample Input Select The MUX4 field is used during the fifth sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 17:16 MUX4 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:14 reserved RO 0 4th Sample Input Select The MUX3 field is used during the fourth sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 13:12 MUX3 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:10 reserved RO 0 3rd Sample Input Select The MUX2 field is used during the third sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 9:8 MUX2 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:6 reserved RO 0 2nd Sample Input Select The MUX1 field is used during the second sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 5:4 MUX1 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0 1st Sample Input Select The MUX0 field is used during the first sample of a sequence executed with the Sample Sequencer and specifies which of the analog inputs is sampled for the analog-to-digital conversion. 1:0 MUX0 R/W 0 November 30, 2007 283 Preliminary LM3S6952 Microcontroller Register 12: ADC Sample Sequence Control 0 (ADCSSCTL0), offset 0x044 This register contains the configuration information for each sample for a sequence executed with Sample Sequencer 0. When configuring a sample sequence, the END bit must be set at some point, whether it be after the first sample, last sample, or any sample in between. This register is 32-bits wide and contains information for eight possible samples. ADC Sample Sequence Control 0 (ADCSSCTL0) Base 0x4003.8000 Offset 0x044 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 TS7 IE7 END7 D7 TS6 IE6 END6 D6 TS5 IE5 END5 D5 TS4 IE4 END4 D4 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TS3 IE3 END3 D3 TS2 IE2 END2 D2 TS1 IE1 END1 D1 TS0 IE0 END0 D0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description 8th Sample Temp Sensor Select The TS7 bit is used during the eighth sample of the sample sequence and specifies the input source of the sample. If set, the temperature sensor is read. Otherwise, the input pin specified by the ADCSSMUX register is read. 31 TS7 R/W 0 8th Sample Interrupt Enable The IE7 bit is used during the eighth sample of the sample sequence and specifies whether the raw interrupt signal (INR0 bit) is asserted at the end of the sample's conversion. If the MASK0 bit in the ADCIM register is set, the interrupt is promoted to a controller-level interrupt. When this bit is set, the raw interrupt is asserted, otherwise it is not. It is legal to have multiple samples within a sequence generate interrupts. 30 IE7 R/W 0 8th Sample is End of Sequence The END7 bit indicates that this is the last sample of the sequence. It is possible to end the sequence on any sample position. Samples defined after the sample containing a set END are not requested for conversion even though the fields may be non-zero. It is required that software write the END bit somewhere within the sequence. (Sample Sequencer 3, which only has a single sample in the sequence, is hardwired to have the END0 bit set.) Setting this bit indicates that this sample is the last in the sequence. 29 END7 R/W 0 8th Sample Diff Input Select The D7 bit indicates that the analog input is to be differentially sampled. The corresponding ADCSSMUXx nibble must be set to the pair number "i", where the paired inputs are "2i and 2i+1". The temperature sensor does not have a differential option. When set, the analog inputs are differentially sampled. 28 D7 R/W 0 7th Sample Temp Sensor Select Same definition as TS7 but used during the seventh sample. 27 TS6 R/W 0 284 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Bit/Field Name Type Reset Description 7th Sample Interrupt Enable Same definition as IE7 but used during the seventh sample. 26 IE6 R/W 0 7th Sample is End of Sequence Same definition as END7 but used during the seventh sample. 25 END6 R/W 0 7th Sample Diff Input Select Same definition as D7 but used during the seventh sample. 24 D6 R/W 0 6th Sample Temp Sensor Select Same definition as TS7 but used during the sixth sample. 23 TS5 R/W 0 6th Sample Interrupt Enable Same definition as IE7 but used during the sixth sample. 22 IE5 R/W 0 6th Sample is End of Sequence Same definition as END7 but used during the sixth sample. 21 END5 R/W 0 6th Sample Diff Input Select Same definition as D7 but used during the sixth sample. 20 D5 R/W 0 5th Sample Temp Sensor Select Same definition as TS7 but used during the fifth sample. 19 TS4 R/W 0 5th Sample Interrupt Enable Same definition as IE7 but used during the fifth sample. 18 IE4 R/W 0 5th Sample is End of Sequence Same definition as END7 but used during the fifth sample. 17 END4 R/W 0 5th Sample Diff Input Select Same definition as D7 but used during the fifth sample. 16 D4 R/W 0 4th Sample Temp Sensor Select Same definition as TS7 but used during the fourth sample. 15 TS3 R/W 0 4th Sample Interrupt Enable Same definition as IE7 but used during the fourth sample. 14 IE3 R/W 0 4th Sample is End of Sequence Same definition as END7 but used during the fourth sample. 13 END3 R/W 0 4th Sample Diff Input Select Same definition as D7 but used during the fourth sample. 12 D3 R/W 0 3rd Sample Temp Sensor Select Same definition as TS7 but used during the third sample. 11 TS2 R/W 0 November 30, 2007 285 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description 3rd Sample Interrupt Enable Same definition as IE7 but used during the third sample. 10 IE2 R/W 0 3rd Sample is End of Sequence Same definition as END7 but used during the third sample. 9 END2 R/W 0 3rd Sample Diff Input Select Same definition as D7 but used during the third sample. 8 D2 R/W 0 2nd Sample Temp Sensor Select Same definition as TS7 but used during the second sample. 7 TS1 R/W 0 2nd Sample Interrupt Enable Same definition as IE7 but used during the second sample. 6 IE1 R/W 0 2nd Sample is End of Sequence Same definition as END7 but used during the second sample. 5 END1 R/W 0 2nd Sample Diff Input Select Same definition as D7 but used during the second sample. 4 D1 R/W 0 1st Sample Temp Sensor Select Same definition as TS7 but used during the first sample. 3 TS0 R/W 0 1st Sample Interrupt Enable Same definition as IE7 but used during the first sample. 2 IE0 R/W 0 1st Sample is End of Sequence Same definition as END7 but used during the first sample. Since this sequencer has only one entry, this bit must be set. 1 END0 R/W 0 1st Sample Diff Input Select Same definition as D7 but used during the first sample. 0 D0 R/W 0 286 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 13: ADC Sample Sequence Result FIFO 0 (ADCSSFIFO0), offset 0x048 Register 14: ADC Sample Sequence Result FIFO 1 (ADCSSFIFO1), offset 0x068 Register 15: ADC Sample Sequence Result FIFO 2 (ADCSSFIFO2), offset 0x088 Register 16: ADC Sample Sequence Result FIFO 3 (ADCSSFIFO3), offset 0x0A8 This register contains the conversion results for samples collected with the Sample Sequencer (the ADCSSFIFO0 register is used for Sample Sequencer 0, ADCSSFIFO1 for Sequencer 1, ADCSSFIFO2 for Sequencer 2, and ADCSSFIFO3 for Sequencer 3). Reads of this register return conversion result data in the order sample 0, sample 1, and so on, until the FIFO is empty. If the FIFO is not properly handled by software, overflow and underflow conditions are registered in the ADCOSTAT and ADCUSTAT registers. ADC Sample Sequence Result FIFO 0 (ADCSSFIFO0) Base 0x4003.8000 Offset 0x048 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DATA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:10 reserved RO 0x00 9:0 DATA RO 0x00 Conversion Result Data November 30, 2007 287 Preliminary LM3S6952 Microcontroller Register 17: ADC Sample Sequence FIFO 0 Status (ADCSSFSTAT0), offset 0x04C Register 18: ADC Sample Sequence FIFO 1 Status (ADCSSFSTAT1), offset 0x06C Register 19: ADC Sample Sequence FIFO 2 Status (ADCSSFSTAT2), offset 0x08C Register 20: ADC Sample Sequence FIFO 3 Status (ADCSSFSTAT3), offset 0x0AC This register provides a window into the Sample Sequencer, providing full/empty status information as well as the positions of the head and tail pointers. The reset value of 0x100 indicates an empty FIFO. The ADCSSFSTAT0 register provides status on FIF0, ADCSSFSTAT1 on FIFO1, ADCSSFSTAT2 on FIFO2, and ADCSSFSTAT3 on FIFO3. ADC Sample Sequence FIFO 0 Status (ADCSSFSTAT0) Base 0x4003.8000 Offset 0x04C Type RO, reset 0x0000.0100 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved FULL reserved EMPTY HPTR TPTR Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:13 reserved RO 0x00 FIFO Full When set, indicates that the FIFO is currently full. 12 FULL RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:9 reserved RO 0x00 FIFO Empty When set, indicates that the FIFO is currently empty. 8 EMPTY RO 1 FIFO Head Pointer This field contains the current "head" pointer index for the FIFO, that is, the next entry to be written. 7:4 HPTR RO 0x00 FIFO Tail Pointer This field contains the current "tail" pointer index for the FIFO, that is, the next entry to be read. 3:0 TPTR RO 0x00 288 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 21: ADC Sample Sequence Input Multiplexer Select 1 (ADCSSMUX1), offset 0x060 Register 22: ADC Sample Sequence Input Multiplexer Select 2 (ADCSSMUX2), offset 0x080 This register defines the analog input configuration for each sample in a sequence executed with Sample Sequencer 1 or 2. These registers are 16-bits wide and contain information for four possible samples. See the ADCSSMUX0 register on page 282 for detailed bit descriptions. ADC Sample Sequence Input Multiplexer Select 1 (ADCSSMUX1) Base 0x4003.8000 Offset 0x060 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MUX3 reserved MUX2 reserved MUX1 reserved MUX0 Type RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:14 reserved RO 0x00 13:12 MUX3 R/W 0 4th Sample Input Select Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:10 reserved RO 0 9:8 MUX2 R/W 0 3rd Sample Input Select Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:6 reserved RO 0 5:4 MUX1 R/W 0 2nd Sample Input Select Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0 1:0 MUX0 R/W 0 1st Sample Input Select November 30, 2007 289 Preliminary LM3S6952 Microcontroller Register 23: ADC Sample Sequence Control 1 (ADCSSCTL1), offset 0x064 Register 24: ADC Sample Sequence Control 2 (ADCSSCTL2), offset 0x084 These registers contain the configuration information for each sample for a sequence executed with Sample Sequencer 1 or 2. When configuring a sample sequence, the END bit must be set at some point, whether it be after the first sample, last sample, or any sample in between. This register is 16-bits wide and contains information for four possible samples. See the ADCSSCTL0 register on page 284 for detailed bit descriptions. ADC Sample Sequence Control 1 (ADCSSCTL1) Base 0x4003.8000 Offset 0x064 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TS3 IE3 END3 D3 TS2 IE2 END2 D2 TS1 IE1 END1 D1 TS0 IE0 END0 D0 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 4th Sample Temp Sensor Select Same definition as TS7 but used during the fourth sample. 15 TS3 R/W 0 4th Sample Interrupt Enable Same definition as IE7 but used during the fourth sample. 14 IE3 R/W 0 4th Sample is End of Sequence Same definition as END7 but used during the fourth sample. 13 END3 R/W 0 4th Sample Diff Input Select Same definition as D7 but used during the fourth sample. 12 D3 R/W 0 3rd Sample Temp Sensor Select Same definition as TS7 but used during the third sample. 11 TS2 R/W 0 3rd Sample Interrupt Enable Same definition as IE7 but used during the third sample. 10 IE2 R/W 0 3rd Sample is End of Sequence Same definition as END7 but used during the third sample. 9 END2 R/W 0 3rd Sample Diff Input Select Same definition as D7 but used during the third sample. 8 D2 R/W 0 290 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Bit/Field Name Type Reset Description 2nd Sample Temp Sensor Select Same definition as TS7 but used during the second sample. 7 TS1 R/W 0 2nd Sample Interrupt Enable Same definition as IE7 but used during the second sample. 6 IE1 R/W 0 2nd Sample is End of Sequence Same definition as END7 but used during the second sample. 5 END1 R/W 0 2nd Sample Diff Input Select Same definition as D7 but used during the second sample. 4 D1 R/W 0 1st Sample Temp Sensor Select Same definition as TS7 but used during the first sample. 3 TS0 R/W 0 1st Sample Interrupt Enable Same definition as IE7 but used during the first sample. 2 IE0 R/W 0 1st Sample is End of Sequence Same definition as END7 but used during the first sample. Since this sequencer has only one entry, this bit must be set. 1 END0 R/W 0 1st Sample Diff Input Select Same definition as D7 but used during the first sample. 0 D0 R/W 0 November 30, 2007 291 Preliminary LM3S6952 Microcontroller Register 25: ADC Sample Sequence Input Multiplexer Select 3 (ADCSSMUX3), offset 0x0A0 This register defines the analog input configuration for each sample in a sequence executed with Sample Sequencer 3. This register is 4-bits wide and contains information for one possible sample. See the ADCSSMUX0 register on page 282 for detailed bit descriptions. ADC Sample Sequence Input Multiplexer Select 3 (ADCSSMUX3) Base 0x4003.8000 Offset 0x0A0 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MUX0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 1:0 MUX0 R/W 0 1st Sample Input Select 292 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Register 26: ADC Sample Sequence Control 3 (ADCSSCTL3), offset 0x0A4 This register contains the configuration information for each sample for a sequence executed with Sample Sequencer 3. The END bit is always set since there is only one sample in this sequencer. This register is 4-bits wide and contains information for one possible sample. See the ADCSSCTL0 register on page 284 for detailed bit descriptions. ADC Sample Sequence Control 3 (ADCSSCTL3) Base 0x4003.8000 Offset 0x0A4 Type R/W, reset 0x0000.0002 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TS0 IE0 END0 D0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 1st Sample Temp Sensor Select Same definition as TS7 but used during the first sample. 3 TS0 R/W 0 1st Sample Interrupt Enable Same definition as IE7 but used during the first sample. 2 IE0 R/W 0 1st Sample is End of Sequence Same definition as END7 but used during the first sample. Since this sequencer has only one entry, this bit must be set. 1 END0 R/W 1 1st Sample Diff Input Select Same definition as D7 but used during the first sample. 0 D0 R/W 0 November 30, 2007 293 Preliminary LM3S6952 Microcontroller Register 27: ADC Test Mode Loopback (ADCTMLB), offset 0x100 This register provides loopback operation within the digital logic of the ADC, which can be useful in debugging software without having to provide actual analog stimulus. This test mode is entered by writing a value of 0x0000.0001 to this register. When data is read from the FIFO in loopback mode, the read-only portion of this register is returned. Read-Only Register ADC Test Mode Loopback (ADCTMLB) Base 0x4003.8000 Offset 0x100 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CNT CONT DIFF TS MUX Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:10 reserved RO 0x00 Continuous Sample Counter Continuous sample counter that is initialized to 0 and counts each sample as it processed. This helps provide a unique value for the data received. 9:6 CNT RO 0x0 Continuation Sample Indicator When set, indicates that this is a continuation sample. For example, if two sequencers were to run back-to-back, this indicates that the controller kept continuously sampling at full rate. 5 CONT RO 0 Differential Sample Indicator When set, indicates that this is a differential sample. 4 DIFF RO 0 Temp Sensor Sample Indicator When set, indicates that this is a temperature sensor sample. 3 TS RO 0 Analog Input Indicator Indicates which analog input is to be sampled. 2:0 MUX RO 0x0 294 November 30, 2007 Preliminary Analog-to-Digital Converter (ADC) Write-Only Register ADC Test Mode Loopback (ADCTMLB) Base 0x4003.8000 Offset 0x100 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved LB Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Loopback Mode Enable When set, forces a loopback within the digital block to provide information on input and unique numbering. The 10-bit loopback data is defined as shown in the read for bits 9:0 above. 0 LB WO 0 November 30, 2007 295 Preliminary LM3S6952 Microcontroller 13 Universal Asynchronous Receivers/Transmitters (UARTs) The Stellaris® Universal Asynchronous Receiver/Transmitter (UART) provides fully programmable, 16C550-type serial interface characteristics. The LM3S6952 controller is equipped with three UART modules. Each UART has the following features: ■ Separate transmit and receive FIFOs ■ Programmable FIFO length, including 1-byte deep operation providing conventional double-buffered interface ■ FIFO trigger levels of 1/8, 1/4, 1/2, 3/4, and 7/8 ■ Programmable baud-rate generator allowing rates up to 3.125 Mbps ■ Standard asynchronous communication bits for start, stop, and parity ■ False start bit detection ■ Line-break generation and detection ■ Fully programmable serial interface characteristics: – 5, 6, 7, or 8 data bits – Even, odd, stick, or no-parity bit generation/detection – 1 or 2 stop bit generation ■ IrDA serial-IR (SIR) encoder/decoder providing: – Programmable use of IrDA Serial InfraRed (SIR) or UART input/output – Support of IrDA SIR encoder/decoder functions for data rates up to 115.2 Kbps half-duplex – Support of normal 3/16 and low-power (1.41-2.23 μs) bit durations – Programmable internal clock generator enabling division of reference clock by 1 to 256 for low-power mode bit duration 296 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) 13.1 Block Diagram Figure 13-1. UART Module Block Diagram Receiver Transmitter System Clock Control / Status UARTRSR/ECR UARTFR UARTLCRH UARTCTL UARTILPR Interrupt Control UARTIFLS UARTIM UARTMIS UARTRIS UARTICR Baud Rate Generator UARTIBRD UARTFBRD Identification Registers UARTPCellID0 UARTPCellID1 UARTPCellID2 UARTPCellID3 UARTPeriphID0 UARTPeriphID1 UARTPeriphID2 UARTPeriphID3 UART PeriphID4 UARTPeriphID5 UARTPeriphID6 UARTPeriphID7 UARTDR TXFIFO 16x8 ... RXFIFO 16x8 ... Interrupt UnTx UnRx 13.2 Functional Description Each Stellaris® UART performs the functions of parallel-to-serial and serial-to-parallel conversions. It is similar in functionality to a 16C550 UART, but is not register compatible. The UART is configured for transmit and/or receive via the TXE and RXE bits of the UART Control (UARTCTL) register (see page 315). Transmit and receive are both enabled out of reset. Before any control registers are programmed, the UART must be disabled by clearing the UARTEN bit in UARTCTL. If the UART is disabled during a TX or RX operation, the current transaction is completed prior to the UART stopping. The UART peripheral also includes a serial IR (SIR) encoder/decoder block that can be connected to an infrared transceiver to implement an IrDA SIR physical layer. The SIR function is programmed using the UARTCTL register. 13.2.1 Transmit/Receive Logic The transmit logic performs parallel-to-serial conversion on the data read from the transmit FIFO. The control logic outputs the serial bit stream beginning with a start bit, and followed by the data November 30, 2007 297 Preliminary LM3S6952 Microcontroller bits (LSB first), parity bit, and the stop bits according to the programmed configuration in the control registers. See Figure 13-2 on page 298 for details. The receive logic performs serial-to-parallel conversion on the received bit stream after a valid start pulse has been detected. Overrun, parity, frame error checking, and line-break detection are also performed, and their status accompanies the data that is written to the receive FIFO. Figure 13-2. UART Character Frame 1 0 5-8 data bits LSB MSB Parity bit if enabled 1-2 stop bits UnTX n Start 13.2.2 Baud-Rate Generation The baud-rate divisor is a 22-bit number consisting of a 16-bit integer and a 6-bit fractional part. The number formed by these two values is used by the baud-rate generator to determine the bit period. Having a fractional baud-rate divider allows the UART to generate all the standard baud rates. The 16-bit integer is loaded through the UART Integer Baud-Rate Divisor (UARTIBRD) register (see page 311) and the 6-bit fractional part is loaded with the UART Fractional Baud-Rate Divisor (UARTFBRD) register (see page 312). The baud-rate divisor (BRD) has the following relationship to the system clock (where BRDI is the integer part of the BRD and BRDF is the fractional part, separated by a decimal place.): BRD = BRDI + BRDF = SysClk / (16 * Baud Rate) The 6-bit fractional number (that is to be loaded into the DIVFRAC bit field in the UARTFBRD register) can be calculated by taking the fractional part of the baud-rate divisor, multiplying it by 64, and adding 0.5 to account for rounding errors: UARTFBRD[DIVFRAC] = integer(BRDF * 64 + 0.5) The UART generates an internal baud-rate reference clock at 16x the baud-rate (referred to as Baud16). This reference clock is divided by 16 to generate the transmit clock, and is used for error detection during receive operations. Along with the UART Line Control, High Byte (UARTLCRH) register (see page 313), the UARTIBRD and UARTFBRD registers form an internal 30-bit register. This internal register is only updated when a write operation to UARTLCRH is performed, so any changes to the baud-rate divisor must be followed by a write to the UARTLCRH register for the changes to take effect. To update the baud-rate registers, there are four possible sequences: ■ UARTIBRD write, UARTFBRD write, and UARTLCRH write ■ UARTFBRD write, UARTIBRD write, and UARTLCRH write ■ UARTIBRD write and UARTLCRH write ■ UARTFBRD write and UARTLCRH write 298 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) 13.2.3 Data Transmission Data received or transmitted is stored in two 16-byte FIFOs, though the receive FIFO has an extra four bits per character for status information. For transmission, data is written into the transmit FIFO. If the UART is enabled, it causes a data frame to start transmitting with the parameters indicated in the UARTLCRH register. Data continues to be transmitted until there is no data left in the transmit FIFO. The BUSY bit in the UART Flag (UARTFR) register (see page 308) is asserted as soon as data is written to the transmit FIFO (that is, if the FIFO is non-empty) and remains asserted while data is being transmitted. The BUSY bit is negated only when the transmit FIFO is empty, and the last character has been transmitted from the shift register, including the stop bits. The UART can indicate that it is busy even though the UART may no longer be enabled. When the receiver is idle (the UnRx is continuously 1) and the data input goes Low (a start bit has been received), the receive counter begins running and data is sampled on the eighth cycle of Baud16 (described in “Transmit/Receive Logic” on page 297). The start bit is valid if UnRx is still low on the eighth cycle of Baud16, otherwise a false start bit is detected and it is ignored. Start bit errors can be viewed in the UART Receive Status (UARTRSR) register (see page 306). If the start bit was valid, successive data bits are sampled on every 16th cycle of Baud16 (that is, one bit period later) according to the programmed length of the data characters. The parity bit is then checked if parity mode was enabled. Data length and parity are defined in the UARTLCRH register. Lastly, a valid stop bit is confirmed if UnRx is High, otherwise a framing error has occurred. When a full word is received, the data is stored in the receive FIFO, with any error bits associated with that word. 13.2.4 Serial IR (SIR) The UART peripheral includes an IrDA serial-IR (SIR) encoder/decoder block. The IrDA SIR block provides functionality that converts between an asynchronous UART data stream, and half-duplex serial SIR interface. No analog processing is performed on-chip. The role of the SIR block is to provide a digital encoded output, and decoded input to the UART. The UART signal pins can be connected to an infrared transceiver to implement an IrDA SIR physical layer link. The SIR block has two modes of operation: ■ In normal IrDA mode, a zero logic level is transmitted as high pulse of 3/16th duration of the selected baud rate bit period on the output pin, while logic one levels are transmitted as a static LOW signal. These levels control the driver of an infrared transmitter, sending a pulse of light for each zero. On the reception side, the incoming light pulses energize the photo transistor base of the receiver, pulling its output LOW. This drives the UART input pin LOW. ■ In low-power IrDA mode, the width of the transmitted infrared pulse is set to three times the period of the internally generated IrLPBaud16 signal (1.63 μs, assuming a nominal 1.8432 MHz frequency) by changing the appropriate bit in the UARTCR register. Figure 13-3 on page 300 shows the UART transmit and receive signals, with and without IrDA modulation. November 30, 2007 299 Preliminary LM3S6952 Microcontroller Figure 13-3. IrDA Data Modulation 0 1 0 1 0 0 1 1 0 1 Data bits 0 1 0 1 0 0 1 1 0 1 Start Data bits bit Start Stop Bit period Bit period 3 16 UnTx UnTx with IrDA UnRx with IrDA UnRx Stop bit In both normal and low-power IrDA modes: ■ During transmission, the UART data bit is used as the base for encoding ■ During reception, the decoded bits are transferred to the UART receive logic The IrDA SIR physical layer specifies a half-duplex communication link, with a minimum 10 ms delay between transmission and reception. This delay must be generated by software because it is not automatically supported by the UART. The delay is required because the infrared receiver electronics might become biased, or even saturated from the optical power coupled from the adjacent transmitter LED. This delay is known as latency, or receiver setup time. 13.2.5 FIFO Operation The UART has two 16-entry FIFOs; one for transmit and one for receive. Both FIFOs are accessed via the UART Data (UARTDR) register (see page 304). Read operations of the UARTDR register return a 12-bit value consisting of 8 data bits and 4 error flags while write operations place 8-bit data in the transmit FIFO. Out of reset, both FIFOs are disabled and act as 1-byte-deep holding registers. The FIFOs are enabled by setting the FEN bit in UARTLCRH (page 313). FIFO status can be monitored via the UART Flag (UARTFR) register (see page 308) and the UART Receive Status (UARTRSR) register. Hardware monitors empty, full and overrun conditions. The UARTFR register contains empty and full flags (TXFE, TXFF, RXFE, and RXFF bits) and the UARTRSR register shows overrun status via the OE bit. The trigger points at which the FIFOs generate interrupts is controlled via the UART Interrupt FIFO Level Select (UARTIFLS) register (see page 317). Both FIFOs can be individually configured to trigger interrupts at different levels. Available configurations include 1/8, ¼, ½, ¾, and 7/8. For example, if the ¼ option is selected for the receive FIFO, the UART generates a receive interrupt after 4 data bytes are received. Out of reset, both FIFOs are configured to trigger an interrupt at the ½ mark. 13.2.6 Interrupts The UART can generate interrupts when the following conditions are observed: ■ Overrun Error ■ Break Error 300 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) ■ Parity Error ■ Framing Error ■ Receive Timeout ■ Transmit (when condition defined in the TXIFLSEL bit in the UARTIFLS register is met) ■ Receive (when condition defined in the RXIFLSEL bit in the UARTIFLS register is met) All of the interrupt events are ORed together before being sent to the interrupt controller, so the UART can only generate a single interrupt request to the controller at any given time. Software can service multiple interrupt events in a single interrupt service routine by reading the UART Masked Interrupt Status (UARTMIS) register (see page 322). The interrupt events that can trigger a controller-level interrupt are defined in the UART Interrupt Mask (UARTIM ) register (see page 319) by setting the corresponding IM bit to 1. If interrupts are not used, the raw interrupt status is always visible via the UART Raw Interrupt Status (UARTRIS) register (see page 321). Interrupts are always cleared (for both the UARTMIS and UARTRIS registers) by setting the corresponding bit in the UART Interrupt Clear (UARTICR) register (see page 323). The receive timeout interrupt is asserted when the receive FIFO is not empty, and no further data is received over a 32-bit period. The receive timeout interrupt is cleared either when the FIFO becomes empty through reading all the data (or by reading the holding register), or when a 1 is written to the corresponding bit in the UARTICR register. 13.2.7 Loopback Operation The UART can be placed into an internal loopback mode for diagnostic or debug work. This is accomplished by setting the LBE bit in the UARTCTL register (see page 315). In loopback mode, data transmitted on UnTx is received on the UnRx input. 13.2.8 IrDA SIR block The IrDA SIR block contains an IrDA serial IR (SIR) protocol encoder/decoder. When enabled, the SIR block uses the UnTx and UnRx pins for the SIR protocol, which should be connected to an IR transceiver. The SIR block can receive and transmit, but it is only half-duplex so it cannot do both at the same time. Transmission must be stopped before data can be received. The IrDA SIR physical layer specifies a minimum 10-ms delay between transmission and reception. 13.3 Initialization and Configuration To use the UARTs, the peripheral clock must be enabled by setting the UART0, UART1, or UART2 bits in the RCGC1 register. This section discusses the steps that are required for using a UART module. For this example, the system clock is assumed to be 20 MHz and the desired UART configuration is: ■ 115200 baud rate ■ Data length of 8 bits ■ One stop bit November 30, 2007 301 Preliminary LM3S6952 Microcontroller ■ No parity ■ FIFOs disabled ■ No interrupts The first thing to consider when programming the UART is the baud-rate divisor (BRD), since the UARTIBRD and UARTFBRD registers must be written before the UARTLCRH register. Using the equation described in “Baud-Rate Generation” on page 298, the BRD can be calculated: BRD = 20,000,000 / (16 * 115,200) = 10.8507 which means that the DIVINT field of the UARTIBRD register (see page 311) should be set to 10. The value to be loaded into the UARTFBRD register (see page 312) is calculated by the equation: UARTFBRD[DIVFRAC] = integer(0.8507 * 64 + 0.5) = 54 With the BRD values in hand, the UART configuration is written to the module in the following order: 1. Disable the UART by clearing the UARTEN bit in the UARTCTL register. 2. Write the integer portion of the BRD to the UARTIBRD register. 3. Write the fractional portion of the BRD to the UARTFBRD register. 4. Write the desired serial parameters to the UARTLCRH register (in this case, a value of 0x0000.0060). 5. Enable the UART by setting the UARTEN bit in the UARTCTL register. 13.4 Register Map Table 13-1 on page 302 lists the UART registers. The offset listed is a hexadecimal increment to the register’s address, relative to that UART’s base address: ■ UART0: 0x4000.C000 ■ UART1: 0x4000.D000 ■ UART2: 0x4000.E000 Note: The UART must be disabled (see the UARTEN bit in the UARTCTL register on page 315) before any of the control registers are reprogrammed. When the UART is disabled during a TX or RX operation, the current transaction is completed prior to the UART stopping. Table 13-1. UART Register Map See Offset Name Type Reset Description page 0x000 UARTDR R/W 0x0000.0000 UART Data 304 0x004 UARTRSR/UARTECR R/W 0x0000.0000 UART Receive Status/Error Clear 306 0x018 UARTFR RO 0x0000.0090 UART Flag 308 0x020 UARTILPR R/W 0x0000.0000 UART IrDA Low-Power Register 310 302 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) See Offset Name Type Reset Description page 0x024 UARTIBRD R/W 0x0000.0000 UART Integer Baud-Rate Divisor 311 0x028 UARTFBRD R/W 0x0000.0000 UART Fractional Baud-Rate Divisor 312 0x02C UARTLCRH R/W 0x0000.0000 UART Line Control 313 0x030 UARTCTL R/W 0x0000.0300 UART Control 315 0x034 UARTIFLS R/W 0x0000.0012 UART Interrupt FIFO Level Select 317 0x038 UARTIM R/W 0x0000.0000 UART Interrupt Mask 319 0x03C UARTRIS RO 0x0000.000F UART Raw Interrupt Status 321 0x040 UARTMIS RO 0x0000.0000 UART Masked Interrupt Status 322 0x044 UARTICR W1C 0x0000.0000 UART Interrupt Clear 323 0xFD0 UARTPeriphID4 RO 0x0000.0000 UART Peripheral Identification 4 325 0xFD4 UARTPeriphID5 RO 0x0000.0000 UART Peripheral Identification 5 326 0xFD8 UARTPeriphID6 RO 0x0000.0000 UART Peripheral Identification 6 327 0xFDC UARTPeriphID7 RO 0x0000.0000 UART Peripheral Identification 7 328 0xFE0 UARTPeriphID0 RO 0x0000.0011 UART Peripheral Identification 0 329 0xFE4 UARTPeriphID1 RO 0x0000.0000 UART Peripheral Identification 1 330 0xFE8 UARTPeriphID2 RO 0x0000.0018 UART Peripheral Identification 2 331 0xFEC UARTPeriphID3 RO 0x0000.0001 UART Peripheral Identification 3 332 0xFF0 UARTPCellID0 RO 0x0000.000D UART PrimeCell Identification 0 333 0xFF4 UARTPCellID1 RO 0x0000.00F0 UART PrimeCell Identification 1 334 0xFF8 UARTPCellID2 RO 0x0000.0005 UART PrimeCell Identification 2 335 0xFFC UARTPCellID3 RO 0x0000.00B1 UART PrimeCell Identification 3 336 13.5 Register Descriptions The remainder of this section lists and describes the UART registers, in numerical order by address offset. November 30, 2007 303 Preliminary LM3S6952 Microcontroller Register 1: UART Data (UARTDR), offset 0x000 This register is the data register (the interface to the FIFOs). When FIFOs are enabled, data written to this location is pushed onto the transmit FIFO. If FIFOs are disabled, data is stored in the transmitter holding register (the bottom word of the transmit FIFO). A write to this register initiates a transmission from the UART. For received data, if the FIFO is enabled, the data byte and the 4-bit status (break, frame, parity, and overrun) is pushed onto the 12-bit wide receive FIFO. If FIFOs are disabled, the data byte and status are stored in the receiving holding register (the bottom word of the receive FIFO). The received data can be retrieved by reading this register. UART Data (UARTDR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OE BE PE FE DATA Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0 UART Overrun Error The OE values are defined as follows: Value Description 0 There has been no data loss due to a FIFO overrun. New data was received when the FIFO was full, resulting in data loss. 1 11 OE RO 0 UART Break Error This bit is set to 1 when a break condition is detected, indicating that the receive data input was held Low for longer than a full-word transmission time (defined as start, data, parity, and stop bits). In FIFO mode, this error is associated with the character at the top of the FIFO. When a break occurs, only one 0 character is loaded into the FIFO. The next character is only enabled after the received data input goes to a 1 (marking state) and the next valid start bit is received. 10 BE RO 0 304 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Bit/Field Name Type Reset Description UART Parity Error This bit is set to 1 when the parity of the received data character does not match the parity defined by bits 2 and 7 of the UARTLCRH register. In FIFO mode, this error is associated with the character at the top of the FIFO. 9 PE RO 0 UART Framing Error This bit is set to 1 when the received character does not have a valid stop bit (a valid stop bit is 1). 8 FE RO 0 Data Transmitted or Received When written, the data that is to be transmitted via the UART. When read, the data that was received by the UART. 7:0 DATA R/W 0 November 30, 2007 305 Preliminary LM3S6952 Microcontroller Register 2: UART Receive Status/Error Clear (UARTRSR/UARTECR), offset 0x004 The UARTRSR/UARTECR register is the receive status register/error clear register. In addition to the UARTDR register, receive status can also be read from the UARTRSR register. If the status is read from this register, then the status information corresponds to the entry read from UARTDR prior to reading UARTRSR. The status information for overrun is set immediately when an overrun condition occurs. The UARTRSR register cannot be written. A write of any value to the UARTECR register clears the framing, parity, break, and overrun errors. All the bits are cleared to 0 on reset. Read-Only Receive Status (UARTRSR) Register UART Receive Status/Error Clear (UARTRSR/UARTECR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x004 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OE BE PE FE Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0 UART Overrun Error When this bit is set to 1, data is received and the FIFO is already full. This bit is cleared to 0 by a write to UARTECR. The FIFO contents remain valid since no further data is written when the FIFO is full, only the contents of the shift register are overwritten. The CPU must now read the data in order to empty the FIFO. 3 OE RO 0 UART Break Error This bit is set to 1 when a break condition is detected, indicating that the received data input was held Low for longer than a full-word transmission time (defined as start, data, parity, and stop bits). This bit is cleared to 0 by a write to UARTECR. In FIFO mode, this error is associated with the character at the top of the FIFO. When a break occurs, only one 0 character is loaded into the FIFO. The next character is only enabled after the receive data input goes to a 1 (marking state) and the next valid start bit is received. 2 BE RO 0 306 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Bit/Field Name Type Reset Description UART Parity Error This bit is set to 1 when the parity of the received data character does not match the parity defined by bits 2 and 7 of the UARTLCRH register. This bit is cleared to 0 by a write to UARTECR. 1 PE RO 0 UART Framing Error This bit is set to 1 when the received character does not have a valid stop bit (a valid stop bit is 1). This bit is cleared to 0 by a write to UARTECR. In FIFO mode, this error is associated with the character at the top of the FIFO. 0 FE RO 0 Write-Only Error Clear (UARTECR) Register UART Receive Status/Error Clear (UARTRSR/UARTECR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x004 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DATA Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved WO 0 Error Clear A write to this register of any data clears the framing, parity, break, and overrun flags. 7:0 DATA WO 0 November 30, 2007 307 Preliminary LM3S6952 Microcontroller Register 3: UART Flag (UARTFR), offset 0x018 The UARTFR register is the flag register. After reset, the TXFF, RXFF, and BUSY bits are 0, and TXFE and RXFE bits are 1. UART Flag (UARTFR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x018 Type RO, reset 0x0000.0090 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TXFE RXFF TXFF RXFE BUSY reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0 UART Transmit FIFO Empty The meaning of this bit depends on the state of the FEN bit in the UARTLCRH register. If the FIFO is disabled (FEN is 0), this bit is set when the transmit holding register is empty. If the FIFO is enabled (FEN is 1), this bit is set when the transmit FIFO is empty. 7 TXFE RO 1 UART Receive FIFO Full The meaning of this bit depends on the state of the FEN bit in the UARTLCRH register. If the FIFO is disabled, this bit is set when the receive holding register is full. If the FIFO is enabled, this bit is set when the receive FIFO is full. 6 RXFF RO 0 UART Transmit FIFO Full The meaning of this bit depends on the state of the FEN bit in the UARTLCRH register. If the FIFO is disabled, this bit is set when the transmit holding register is full. If the FIFO is enabled, this bit is set when the transmit FIFO is full. 5 TXFF RO 0 308 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Bit/Field Name Type Reset Description UART Receive FIFO Empty The meaning of this bit depends on the state of the FEN bit in the UARTLCRH register. If the FIFO is disabled, this bit is set when the receive holding register is empty. If the FIFO is enabled, this bit is set when the receive FIFO is empty. 4 RXFE RO 1 UART Busy When this bit is 1, the UART is busy transmitting data. This bit remains set until the complete byte, including all stop bits, has been sent from the shift register. This bit is set as soon as the transmit FIFO becomes non-empty (regardless of whether UART is enabled). 3 BUSY RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 November 30, 2007 309 Preliminary LM3S6952 Microcontroller Register 4: UART IrDA Low-Power Register (UARTILPR), offset 0x020 The UARTILPR register is an 8-bit read/write register that stores the low-power counter divisor value used to generate the IrLPBaud16 signal by dividing down the system clock (SysClk). All the bits are cleared to 0 when reset. The IrLPBaud16 internal signal is generated by dividing down the UARTCLK signal according to the low-power divisor value written to UARTILPR. The low-power divisor value is calculated as follows: ILPDVSR = SysClk / FIrLPBaud16 where FIrLPBaud16 is nominally 1.8432 MHz. IrLPBaud16 is an internal signal used for SIR pulse generation when low-power mode is used. You must choose the divisor so that 1.42 MHz < FIrLPBaud16 < 2.12 MHz, which results in a low-power pulse duration of 1.41–2.11 μs (three times the period of IrLPBaud16). The minimum frequency of IrLPBaud16 ensures that pulses less than one period of IrLPBaud16 are rejected, but that pulses greater than 1.4 μs are accepted as valid pulses. Note: Zero is an illegal value. Programming a zero value results in no IrLPBaud16 pulses being generated. UART IrDA Low-Power Register (UARTILPR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x020 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ILPDVSR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0 IrDA Low-Power Divisor This is an 8-bit low-power divisor value. 7:0 ILPDVSR R/W 0x00 310 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 5: UART Integer Baud-Rate Divisor (UARTIBRD), offset 0x024 The UARTIBRD register is the integer part of the baud-rate divisor value. All the bits are cleared on reset. The minimum possible divide ratio is 1 (when UARTIBRD=0), in which case the UARTFBRD register is ignored. When changing the UARTIBRD register, the new value does not take effect until transmission/reception of the current character is complete. Any changes to the baud-rate divisor must be followed by a write to the UARTLCRH register. See “Baud-Rate Generation” on page 298 for configuration details. UART Integer Baud-Rate Divisor (UARTIBRD) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x024 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DIVINT Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0 15:0 DIVINT R/W 0x0000 Integer Baud-Rate Divisor November 30, 2007 311 Preliminary LM3S6952 Microcontroller Register 6: UART Fractional Baud-Rate Divisor (UARTFBRD), offset 0x028 The UARTFBRD register is the fractional part of the baud-rate divisor value. All the bits are cleared on reset. When changing the UARTFBRD register, the new value does not take effect until transmission/reception of the current character is complete. Any changes to the baud-rate divisor must be followed by a write to the UARTLCRH register. See “Baud-Rate Generation” on page 298 for configuration details. UART Fractional Baud-Rate Divisor (UARTFBRD) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x028 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DIVFRAC Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 5:0 DIVFRAC R/W 0x000 Fractional Baud-Rate Divisor 312 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 7: UART Line Control (UARTLCRH), offset 0x02C The UARTLCRH register is the line control register. Serial parameters such as data length, parity, and stop bit selection are implemented in this register. When updating the baud-rate divisor (UARTIBRD and/or UARTIFRD), the UARTLCRH register must also be written. The write strobe for the baud-rate divisor registers is tied to the UARTLCRH register. UART Line Control (UARTLCRH) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x02C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SPS WLEN FEN STP2 EPS PEN BRK Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0 UART Stick Parity Select When bits 1, 2, and 7 of UARTLCRH are set, the parity bit is transmitted and checked as a 0. When bits 1 and 7 are set and 2 is cleared, the parity bit is transmitted and checked as a 1. When this bit is cleared, stick parity is disabled. 7 SPS R/W 0 UART Word Length The bits indicate the number of data bits transmitted or received in a frame as follows: Value Description 0x3 8 bits 0x2 7 bits 0x1 6 bits 0x0 5 bits (default) 6:5 WLEN R/W 0 UART Enable FIFOs If this bit is set to 1, transmit and receive FIFO buffers are enabled (FIFO mode). When cleared to 0, FIFOs are disabled (Character mode). The FIFOs become 1-byte-deep holding registers. 4 FEN R/W 0 November 30, 2007 313 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART Two Stop Bits Select If this bit is set to 1, two stop bits are transmitted at the end of a frame. The receive logic does not check for two stop bits being received. 3 STP2 R/W 0 UART Even Parity Select If this bit is set to 1, even parity generation and checking is performed during transmission and reception, which checks for an even number of 1s in data and parity bits. When cleared to 0, then odd parity is performed, which checks for an odd number of 1s. This bit has no effect when parity is disabled by the PEN bit. 2 EPS R/W 0 UART Parity Enable If this bit is set to 1, parity checking and generation is enabled; otherwise, parity is disabled and no parity bit is added to the data frame. 1 PEN R/W 0 UART Send Break If this bit is set to 1, a Low level is continually output on the UnTX output, after completing transmission of the current character. For the proper execution of the break command, the software must set this bit for at least two frames (character periods). For normal use, this bit must be cleared to 0. 0 BRK R/W 0 314 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 8: UART Control (UARTCTL), offset 0x030 The UARTCTL register is the control register. All the bits are cleared on reset except for the Transmit Enable (TXE) and Receive Enable (RXE) bits, which are set to 1. To enable the UART module, the UARTEN bit must be set to 1. If software requires a configuration change in the module, the UARTEN bit must be cleared before the configuration changes are written. If the UART is disabled during a transmit or receive operation, the current transaction is completed prior to the UART stopping. UART Control (UARTCTL) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x030 Type R/W, reset 0x0000.0300 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RXE TXE LBE reserved SIRLP SIREN UARTEN Type RO RO RO RO RO RO R/W R/W R/W RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:10 reserved RO 0 UART Receive Enable If this bit is set to 1, the receive section of the UART is enabled. When the UART is disabled in the middle of a receive, it completes the current character before stopping. Note: To enable reception, the UARTEN bit must also be set. 9 RXE R/W 1 UART Transmit Enable If this bit is set to 1, the transmit section of the UART is enabled. When the UART is disabled in the middle of a transmission, it completes the current character before stopping. Note: To enable transmission, the UARTEN bit must also be set. 8 TXE R/W 1 UART Loop Back Enable If this bit is set to 1, the UnTX path is fed through the UnRX path. 7 LBE R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 6:3 reserved RO 0 November 30, 2007 315 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART SIR Low Power Mode This bit selects the IrDA encoding mode. If this bit is cleared to 0, low-level bits are transmitted as an active High pulse with a width of 3/16th of the bit period. If this bit is set to 1, low-level bits are transmitted with a pulse width which is 3 times the period of the IrLPBaud16 input signal, regardless of the selected bit rate. Setting this bit uses less power, but might reduce transmission distances. See page 310 for more information. 2 SIRLP R/W 0 UART SIR Enable If this bit is set to 1, the IrDA SIR block is enabled, and the UART will transmit and receive data using SIR protocol. 1 SIREN R/W 0 UART Enable If this bit is set to 1, the UART is enabled. When the UART is disabled in the middle of transmission or reception, it completes the current character before stopping. 0 UARTEN R/W 0 316 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 9: UART Interrupt FIFO Level Select (UARTIFLS), offset 0x034 The UARTIFLS register is the interrupt FIFO level select register. You can use this register to define the FIFO level at which the TXRIS and RXRIS bits in the UARTRIS register are triggered. The interrupts are generated based on a transition through a level rather than being based on the level. That is, the interrupts are generated when the fill level progresses through the trigger level. For example, if the receive trigger level is set to the half-way mark, the interrupt is triggered as the module is receiving the 9th character. Out of reset, the TXIFLSEL and RXIFLSEL bits are configured so that the FIFOs trigger an interrupt at the half-way mark. UART Interrupt FIFO Level Select (UARTIFLS) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x034 Type R/W, reset 0x0000.0012 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RXIFLSEL TXIFLSEL Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 UART Receive Interrupt FIFO Level Select The trigger points for the receive interrupt are as follows: Value Description 0x0 RX FIFO ≥ 1/8 full 0x1 RX FIFO ≥ ¼ full 0x2 RX FIFO ≥ ½ full (default) 0x3 RX FIFO ≥ ¾ full 0x4 RX FIFO ≥ 7/8 full 0x5-0x7 Reserved 5:3 RXIFLSEL R/W 0x2 November 30, 2007 317 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART Transmit Interrupt FIFO Level Select The trigger points for the transmit interrupt are as follows: Value Description 0x0 TX FIFO ≤ 1/8 full 0x1 TX FIFO ≤ ¼ full 0x2 TX FIFO ≤ ½ full (default) 0x3 TX FIFO ≤ ¾ full 0x4 TX FIFO ≤ 7/8 full 0x5-0x7 Reserved 2:0 TXIFLSEL R/W 0x2 318 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 10: UART Interrupt Mask (UARTIM), offset 0x038 The UARTIM register is the interrupt mask set/clear register. On a read, this register gives the current value of the mask on the relevant interrupt. Writing a 1 to a bit allows the corresponding raw interrupt signal to be routed to the interrupt controller. Writing a 0 prevents the raw interrupt signal from being sent to the interrupt controller. UART Interrupt Mask (UARTIM) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x038 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OEIM BEIM PEIM FEIM RTIM TXIM RXIM reserved Type RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 UART Overrun Error Interrupt Mask On a read, the current mask for the OEIM interrupt is returned. Setting this bit to 1 promotes the OEIM interrupt to the interrupt controller. 10 OEIM R/W 0 UART Break Error Interrupt Mask On a read, the current mask for the BEIM interrupt is returned. Setting this bit to 1 promotes the BEIM interrupt to the interrupt controller. 9 BEIM R/W 0 UART Parity Error Interrupt Mask On a read, the current mask for the PEIM interrupt is returned. Setting this bit to 1 promotes the PEIM interrupt to the interrupt controller. 8 PEIM R/W 0 UART Framing Error Interrupt Mask On a read, the current mask for the FEIM interrupt is returned. Setting this bit to 1 promotes the FEIM interrupt to the interrupt controller. 7 FEIM R/W 0 UART Receive Time-Out Interrupt Mask On a read, the current mask for the RTIM interrupt is returned. Setting this bit to 1 promotes the RTIM interrupt to the interrupt controller. 6 RTIM R/W 0 UART Transmit Interrupt Mask On a read, the current mask for the TXIM interrupt is returned. Setting this bit to 1 promotes the TXIM interrupt to the interrupt controller. 5 TXIM R/W 0 November 30, 2007 319 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description UART Receive Interrupt Mask On a read, the current mask for the RXIM interrupt is returned. Setting this bit to 1 promotes the RXIM interrupt to the interrupt controller. 4 RXIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0x00 320 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 11: UART Raw Interrupt Status (UARTRIS), offset 0x03C The UARTRIS register is the raw interrupt status register. On a read, this register gives the current raw status value of the corresponding interrupt. A write has no effect. UART Raw Interrupt Status (UARTRIS) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x03C Type RO, reset 0x0000.000F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OERIS BERIS PERIS FERIS RTRIS TXRIS RXRIS reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 UART Overrun Error Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 10 OERIS RO 0 UART Break Error Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 9 BERIS RO 0 UART Parity Error Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 8 PERIS RO 0 UART Framing Error Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 7 FERIS RO 0 UART Receive Time-Out Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 6 RTRIS RO 0 UART Transmit Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 5 TXRIS RO 0 UART Receive Raw Interrupt Status Gives the raw interrupt state (prior to masking) of this interrupt. 4 RXRIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0xF November 30, 2007 321 Preliminary LM3S6952 Microcontroller Register 12: UART Masked Interrupt Status (UARTMIS), offset 0x040 The UARTMIS register is the masked interrupt status register. On a read, this register gives the current masked status value of the corresponding interrupt. A write has no effect. UART Masked Interrupt Status (UARTMIS) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x040 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OEMIS BEMIS PEMIS FEMIS RTMIS TXMIS RXMIS reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 UART Overrun Error Masked Interrupt Status Gives the masked interrupt state of this interrupt. 10 OEMIS RO 0 UART Break Error Masked Interrupt Status Gives the masked interrupt state of this interrupt. 9 BEMIS RO 0 UART Parity Error Masked Interrupt Status Gives the masked interrupt state of this interrupt. 8 PEMIS RO 0 UART Framing Error Masked Interrupt Status Gives the masked interrupt state of this interrupt. 7 FEMIS RO 0 UART Receive Time-Out Masked Interrupt Status Gives the masked interrupt state of this interrupt. 6 RTMIS RO 0 UART Transmit Masked Interrupt Status Gives the masked interrupt state of this interrupt. 5 TXMIS RO 0 UART Receive Masked Interrupt Status Gives the masked interrupt state of this interrupt. 4 RXMIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0 322 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 13: UART Interrupt Clear (UARTICR), offset 0x044 The UARTICR register is the interrupt clear register. On a write of 1, the corresponding interrupt (both raw interrupt and masked interrupt, if enabled) is cleared. A write of 0 has no effect. UART Interrupt Clear (UARTICR) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0x044 Type W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OEIC BEIC PEIC FEIC RTIC TXIC RXIC reserved Type RO RO RO RO RO W1C W1C W1C W1C W1C W1C W1C RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:11 reserved RO 0x00 Overrun Error Interrupt Clear The OEIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 10 OEIC W1C 0 Break Error Interrupt Clear The BEIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 9 BEIC W1C 0 Parity Error Interrupt Clear The PEIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 8 PEIC W1C 0 November 30, 2007 323 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Framing Error Interrupt Clear The FEIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 7 FEIC W1C 0 Receive Time-Out Interrupt Clear The RTIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 6 RTIC W1C 0 Transmit Interrupt Clear The TXIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 5 TXIC W1C 0 Receive Interrupt Clear The RXIC values are defined as follows: Value Description 0 No effect on the interrupt. 1 Clears interrupt. 4 RXIC W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0x00 324 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 14: UART Peripheral Identification 4 (UARTPeriphID4), offset 0xFD0 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 4 (UARTPeriphID4) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFD0 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID4 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[7:0] Can be used by software to identify the presence of this peripheral. 7:0 PID4 RO 0x0000 November 30, 2007 325 Preliminary LM3S6952 Microcontroller Register 15: UART Peripheral Identification 5 (UARTPeriphID5), offset 0xFD4 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 5 (UARTPeriphID5) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFD4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID5 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[15:8] Can be used by software to identify the presence of this peripheral. 7:0 PID5 RO 0x0000 326 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 16: UART Peripheral Identification 6 (UARTPeriphID6), offset 0xFD8 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 6 (UARTPeriphID6) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFD8 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID6 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[23:16] Can be used by software to identify the presence of this peripheral. 7:0 PID6 RO 0x0000 November 30, 2007 327 Preliminary LM3S6952 Microcontroller Register 17: UART Peripheral Identification 7 (UARTPeriphID7), offset 0xFDC The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 7 (UARTPeriphID7) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFDC Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID7 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0 UART Peripheral ID Register[31:24] Can be used by software to identify the presence of this peripheral. 7:0 PID7 RO 0x0000 328 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 18: UART Peripheral Identification 0 (UARTPeriphID0), offset 0xFE0 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 0 (UARTPeriphID0) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFE0 Type RO, reset 0x0000.0011 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[7:0] Can be used by software to identify the presence of this peripheral. 7:0 PID0 RO 0x11 November 30, 2007 329 Preliminary LM3S6952 Microcontroller Register 19: UART Peripheral Identification 1 (UARTPeriphID1), offset 0xFE4 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 1 (UARTPeriphID1) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFE4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[15:8] Can be used by software to identify the presence of this peripheral. 7:0 PID1 RO 0x00 330 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 20: UART Peripheral Identification 2 (UARTPeriphID2), offset 0xFE8 The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 2 (UARTPeriphID2) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFE8 Type RO, reset 0x0000.0018 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[23:16] Can be used by software to identify the presence of this peripheral. 7:0 PID2 RO 0x18 November 30, 2007 331 Preliminary LM3S6952 Microcontroller Register 21: UART Peripheral Identification 3 (UARTPeriphID3), offset 0xFEC The UARTPeriphIDn registers are hard-coded and the fields within the registers determine the reset values. UART Peripheral Identification 3 (UARTPeriphID3) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFEC Type RO, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART Peripheral ID Register[31:24] Can be used by software to identify the presence of this peripheral. 7:0 PID3 RO 0x01 332 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 22: UART PrimeCell Identification 0 (UARTPCellID0), offset 0xFF0 The UARTPCellIDn registers are hard-coded and the fields within the registers determine the reset values. UART PrimeCell Identification 0 (UARTPCellID0) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFF0 Type RO, reset 0x0000.000D 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART PrimeCell ID Register[7:0] Provides software a standard cross-peripheral identification system. 7:0 CID0 RO 0x0D November 30, 2007 333 Preliminary LM3S6952 Microcontroller Register 23: UART PrimeCell Identification 1 (UARTPCellID1), offset 0xFF4 The UARTPCellIDn registers are hard-coded and the fields within the registers determine the reset values. UART PrimeCell Identification 1 (UARTPCellID1) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFF4 Type RO, reset 0x0000.00F0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART PrimeCell ID Register[15:8] Provides software a standard cross-peripheral identification system. 7:0 CID1 RO 0xF0 334 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) Register 24: UART PrimeCell Identification 2 (UARTPCellID2), offset 0xFF8 The UARTPCellIDn registers are hard-coded and the fields within the registers determine the reset values. UART PrimeCell Identification 2 (UARTPCellID2) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFF8 Type RO, reset 0x0000.0005 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART PrimeCell ID Register[23:16] Provides software a standard cross-peripheral identification system. 7:0 CID2 RO 0x05 November 30, 2007 335 Preliminary LM3S6952 Microcontroller Register 25: UART PrimeCell Identification 3 (UARTPCellID3), offset 0xFFC The UARTPCellIDn registers are hard-coded and the fields within the registers determine the reset values. UART PrimeCell Identification 3 (UARTPCellID3) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 Offset 0xFFC Type RO, reset 0x0000.00B1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 UART PrimeCell ID Register[31:24] Provides software a standard cross-peripheral identification system. 7:0 CID3 RO 0xB1 336 November 30, 2007 Preliminary Universal Asynchronous Receivers/Transmitters (UARTs) 14 Synchronous Serial Interface (SSI) The Stellaris® Synchronous Serial Interface (SSI) is a master or slave interface for synchronous serial communication with peripheral devices that have either Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces. The Stellaris® SSI module has the following features: ■ Master or slave operation ■ Programmable clock bit rate and prescale ■ Separate transmit and receive FIFOs, 16 bits wide, 8 locations deep ■ Programmable interface operation for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces ■ Programmable data frame size from 4 to 16 bits ■ Internal loopback test mode for diagnostic/debug testing 14.1 Block Diagram Figure 14-1. SSI Module Block Diagram Transmit/ Receive Logic Clock Prescaler SSICPSR Control / Status SSICR0 SSICR1 SSISR Interrupt Control SSIIM SSIMIS SSIRIS SSIICR SSIDR TxFIFO 8 x 16 ... RxFIFO 8 x 16 ... System Clock SSITx SSIRx SSIClk SSIFss Interrupt Identification Registers SSIPCellID0 SSIPeriphID0 SSIPeriphID4 SSIPCellID1 SSIPeriphID1 SSIPeriphID5 SSIPCellID2 SSIPeriphID2 SSIPeriphID6 SSIPCellID3 SSIPeriphID3 SSIPeriphID7 14.2 Functional Description The SSI performs serial-to-parallel conversion on data received from a peripheral device. The CPU accesses data, control, and status information. The transmit and receive paths are buffered with November 30, 2007 337 Preliminary LM3S6952 Microcontroller internal FIFO memories allowing up to eight 16-bit values to be stored independently in both transmit and receive modes. 14.2.1 Bit Rate Generation The SSI includes a programmable bit rate clock divider and prescaler to generate the serial output clock. Bit rates are supported to 2 MHz and higher, although maximum bit rate is determined by peripheral devices. The serial bit rate is derived by dividing down the 50-MHz input clock. The clock is first divided by an even prescale value CPSDVSR from 2 to 254, which is programmed in the SSI Clock Prescale (SSICPSR) register (see page 356). The clock is further divided by a value from 1 to 256, which is 1 + SCR, where SCR is the value programmed in the SSI Control0 (SSICR0) register (see page 349). The frequency of the output clock SSIClk is defined by: FSSIClk = FSysClk / (CPSDVSR * (1 + SCR)) Note that although the SSIClk transmit clock can theoretically be 25 MHz, the module may not be able to operate at that speed. For master mode, the system clock must be at least two times faster than the SSIClk. For slave mode, the system clock must be at least 12 times faster than the SSIClk. See “Synchronous Serial Interface (SSI)” on page 543 to view SSI timing parameters. 14.2.2 FIFO Operation 14.2.2.1 Transmit FIFO The common transmit FIFO is a 16-bit wide, 8-locations deep, first-in, first-out memory buffer. The CPU writes data to the FIFO by writing the SSI Data (SSIDR) register (see page 353), and data is stored in the FIFO until it is read out by the transmission logic. When configured as a master or a slave, parallel data is written into the transmit FIFO prior to serial conversion and transmission to the attached slave or master, respectively, through the SSITx pin. 14.2.2.2 Receive FIFO The common receive FIFO is a 16-bit wide, 8-locations deep, first-in, first-out memory buffer. Received data from the serial interface is stored in the buffer until read out by the CPU, which accesses the read FIFO by reading the SSIDR register. When configured as a master or slave, serial data received through the SSIRx pin is registered prior to parallel loading into the attached slave or master receive FIFO, respectively. 14.2.3 Interrupts The SSI can generate interrupts when the following conditions are observed: ■ Transmit FIFO service ■ Receive FIFO service ■ Receive FIFO time-out ■ Receive FIFO overrun All of the interrupt events are ORed together before being sent to the interrupt controller, so the SSI can only generate a single interrupt request to the controller at any given time. You can mask each 338 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) of the four individual maskable interrupts by setting the appropriate bits in the SSI Interrupt Mask (SSIIM) register (see page 357). Setting the appropriate mask bit to 1 enables the interrupt. Provision of the individual outputs, as well as a combined interrupt output, allows use of either a global interrupt service routine, or modular device drivers to handle interrupts. The transmit and receive dynamic dataflow interrupts have been separated from the status interrupts so that data can be read or written in response to the FIFO trigger levels. The status of the individual interrupt sources can be read from the SSI Raw Interrupt Status (SSIRIS) and SSI Masked Interrupt Status (SSIMIS) registers (see page 359 and page 360, respectively). 14.2.4 Frame Formats Each data frame is between 4 and 16 bits long, depending on the size of data programmed, and is transmitted starting with the MSB. There are three basic frame types that can be selected: ■ Texas Instruments synchronous serial ■ Freescale SPI ■ MICROWIRE For all three formats, the serial clock (SSIClk) is held inactive while the SSI is idle, and SSIClk transitions at the programmed frequency only during active transmission or reception of data. The idle state of SSIClk is utilized to provide a receive timeout indication that occurs when the receive FIFO still contains data after a timeout period. For Freescale SPI and MICROWIRE frame formats, the serial frame (SSIFss ) pin is active Low, and is asserted (pulled down) during the entire transmission of the frame. For Texas Instruments synchronous serial frame format, the SSIFss pin is pulsed for one serial clock period starting at its rising edge, prior to the transmission of each frame. For this frame format, both the SSI and the off-chip slave device drive their output data on the rising edge of SSIClk, and latch data from the other device on the falling edge. Unlike the full-duplex transmission of the other two frame formats, the MICROWIRE format uses a special master-slave messaging technique, which operates at half-duplex. In this mode, when a frame begins, an 8-bit control message is transmitted to the off-chip slave. During this transmit, no incoming data is received by the SSI. After the message has been sent, the off-chip slave decodes it and, after waiting one serial clock after the last bit of the 8-bit control message has been sent, responds with the requested data. The returned data can be 4 to 16 bits in length, making the total frame length anywhere from 13 to 25 bits. 14.2.4.1 Texas Instruments Synchronous Serial Frame Format Figure 14-2 on page 339 shows the Texas Instruments synchronous serial frame format for a single transmitted frame. Figure 14-2. TI Synchronous Serial Frame Format (Single Transfer) SSIClk 4 to 16 bits SSIFss SSITx/SSIRx MSB LSB November 30, 2007 339 Preliminary LM3S6952 Microcontroller In this mode, SSIClk and SSIFss are forced Low, and the transmit data line SSITx is tristated whenever the SSI is idle. Once the bottom entry of the transmit FIFO contains data, SSIFss is pulsed High for one SSIClk period. The value to be transmitted is also transferred from the transmit FIFO to the serial shift register of the transmit logic. On the next rising edge of SSIClk, the MSB of the 4 to 16-bit data frame is shifted out on the SSITx pin. Likewise, the MSB of the received data is shifted onto the SSIRx pin by the off-chip serial slave device. Both the SSI and the off-chip serial slave device then clock each data bit into their serial shifter on the falling edge of each SSIClk. The received data is transferred from the serial shifter to the receive FIFO on the first rising edge of SSIClk after the LSB has been latched. Figure 14-3 on page 340 shows the Texas Instruments synchronous serial frame format when back-to-back frames are transmitted. Figure 14-3. TI Synchronous Serial Frame Format (Continuous Transfer) MSB LSB 4 to 16 bits SSIClk SSIFss SSITx/SSIRx 14.2.4.2 Freescale SPI Frame Format The Freescale SPI interface is a four-wire interface where the SSIFss signal behaves as a slave select. The main feature of the Freescale SPI format is that the inactive state and phase of the SSIClk signal are programmable through the SPO and SPH bits within the SSISCR0 control register. SPO Clock Polarity Bit When the SPO clock polarity control bit is Low, it produces a steady state Low value on the SSIClk pin. If the SPO bit is High, a steady state High value is placed on the SSIClk pin when data is not being transferred. SPH Phase Control Bit The SPH phase control bit selects the clock edge that captures data and allows it to change state. It has the most impact on the first bit transmitted by either allowing or not allowing a clock transition before the first data capture edge. When the SPH phase control bit is Low, data is captured on the first clock edge transition. If the SPH bit is High, data is captured on the second clock edge transition. 14.2.4.3 Freescale SPI Frame Format with SPO=0 and SPH=0 Single and continuous transmission signal sequences for Freescale SPI format with SPO=0 and SPH=0 are shown in Figure 14-4 on page 341 and Figure 14-5 on page 341. 340 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Figure 14-4. Freescale SPI Format (Single Transfer) with SPO=0 and SPH=0 4 to 16 bits SSIClk SSIFss SSIRx Q SSITx MSB MSB LSB LSB Note: Q is undefined. Figure 14-5. Freescale SPI Format (Continuous Transfer) with SPO=0 and SPH=0 SSIClk SSIFss SSIRx LSB SSITx MSB LSB 4 to 16 bits LSB MSB MSB MSB LSB In this configuration, during idle periods: ■ SSIClk is forced Low ■ SSIFss is forced High ■ The transmit data line SSITx is arbitrarily forced Low ■ When the SSI is configured as a master, it enables the SSIClk pad ■ When the SSI is configured as a slave, it disables the SSIClk pad If the SSI is enabled and there is valid data within the transmit FIFO, the start of transmission is signified by the SSIFss master signal being driven Low. This causes slave data to be enabled onto the SSIRx input line of the master. The master SSITx output pad is enabled. One half SSIClk period later, valid master data is transferred to the SSITx pin. Now that both the master and slave data have been set, the SSIClk master clock pin goes High after one further half SSIClk period. The data is now captured on the rising and propagated on the falling edges of the SSIClk signal. In the case of a single word transmission, after all bits of the data word have been transferred, the SSIFss line is returned to its idle High state one SSIClk period after the last bit has been captured. However, in the case of continuous back-to-back transmissions, the SSIFss signal must be pulsed High between each data word transfer. This is because the slave select pin freezes the data in its serial peripheral register and does not allow it to be altered if the SPH bit is logic zero. Therefore, the master device must raise the SSIFss pin of the slave device between each data transfer to enable the serial peripheral data write. On completion of the continuous transfer, the SSIFss pin is returned to its idle state one SSIClk period after the last bit has been captured. November 30, 2007 341 Preliminary LM3S6952 Microcontroller 14.2.4.4 Freescale SPI Frame Format with SPO=0 and SPH=1 The transfer signal sequence for Freescale SPI format with SPO=0 and SPH=1 is shown in Figure 14-6 on page 342, which covers both single and continuous transfers. Figure 14-6. Freescale SPI Frame Format with SPO=0 and SPH=1 4 to 16 bits SSIClk SSIFss SSIRx SSITx Q MSB Q MSB LSB LSB Note: Q is undefined. In this configuration, during idle periods: ■ SSIClk is forced Low ■ SSIFss is forced High ■ The transmit data line SSITx is arbitrarily forced Low ■ When the SSI is configured as a master, it enables the SSIClk pad ■ When the SSI is configured as a slave, it disables the SSIClk pad If the SSI is enabled and there is valid data within the transmit FIFO, the start of transmission is signified by the SSIFss master signal being driven Low. The master SSITx output is enabled. After a further one half SSIClk period, both master and slave valid data is enabled onto their respective transmission lines. At the same time, the SSIClk is enabled with a rising edge transition. Data is then captured on the falling edges and propagated on the rising edges of the SSIClk signal. In the case of a single word transfer, after all bits have been transferred, the SSIFss line is returned to its idle High state one SSIClk period after the last bit has been captured. For continuous back-to-back transfers, the SSIFss pin is held Low between successive data words and termination is the same as that of the single word transfer. 14.2.4.5 Freescale SPI Frame Format with SPO=1 and SPH=0 Single and continuous transmission signal sequences for Freescale SPI format with SPO=1 and SPH=0 are shown in Figure 14-7 on page 343 and Figure 14-8 on page 343. 342 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Figure 14-7. Freescale SPI Frame Format (Single Transfer) with SPO=1 and SPH=0 4 to 16 bits SSIClk SSIFss SSIRx SSITx MSB Q MSB LSB LSB Note: Q is undefined. Figure 14-8. Freescale SPI Frame Format (Continuous Transfer) with SPO=1 and SPH=0 SSIClk SSIFss SSITx/SSIRx MSB LSB 4 to 16 bits LSB MSB In this configuration, during idle periods: ■ SSIClk is forced High ■ SSIFss is forced High ■ The transmit data line SSITx is arbitrarily forced Low ■ When the SSI is configured as a master, it enables the SSIClk pad ■ When the SSI is configured as a slave, it disables the SSIClk pad If the SSI is enabled and there is valid data within the transmit FIFO, the start of transmission is signified by the SSIFss master signal being driven Low, which causes slave data to be immediately transferred onto the SSIRx line of the master. The master SSITx output pad is enabled. One half period later, valid master data is transferred to the SSITx line. Now that both the master and slave data have been set, the SSIClk master clock pin becomes Low after one further half SSIClk period. This means that data is captured on the falling edges and propagated on the rising edges of the SSIClk signal. In the case of a single word transmission, after all bits of the data word are transferred, the SSIFss line is returned to its idle High state one SSIClk period after the last bit has been captured. However, in the case of continuous back-to-back transmissions, the SSIFss signal must be pulsed High between each data word transfer. This is because the slave select pin freezes the data in its serial peripheral register and does not allow it to be altered if the SPH bit is logic zero. Therefore, the master device must raise the SSIFss pin of the slave device between each data transfer to enable the serial peripheral data write. On completion of the continuous transfer, the SSIFss pin is returned to its idle state one SSIClk period after the last bit has been captured. November 30, 2007 343 Preliminary LM3S6952 Microcontroller 14.2.4.6 Freescale SPI Frame Format with SPO=1 and SPH=1 The transfer signal sequence for Freescale SPI format with SPO=1 and SPH=1 is shown in Figure 14-9 on page 344, which covers both single and continuous transfers. Figure 14-9. Freescale SPI Frame Format with SPO=1 and SPH=1 4 to 16 bits SSIClk SSIFss SSIRx SSITx Q Q MSB MSB LSB LSB Note: Q is undefined. In this configuration, during idle periods: ■ SSIClk is forced High ■ SSIFss is forced High ■ The transmit data line SSITx is arbitrarily forced Low ■ When the SSI is configured as a master, it enables the SSIClk pad ■ When the SSI is configured as a slave, it disables the SSIClk pad If the SSI is enabled and there is valid data within the transmit FIFO, the start of transmission is signified by the SSIFss master signal being driven Low. The master SSITx output pad is enabled. After a further one-half SSIClk period, both master and slave data are enabled onto their respective transmission lines. At the same time, SSIClk is enabled with a falling edge transition. Data is then captured on the rising edges and propagated on the falling edges of the SSIClk signal. After all bits have been transferred, in the case of a single word transmission, the SSIFss line is returned to its idle high state one SSIClk period after the last bit has been captured. For continuous back-to-back transmissions, the SSIFss pin remains in its active Low state, until the final bit of the last word has been captured, and then returns to its idle state as described above. For continuous back-to-back transfers, the SSIFss pin is held Low between successive data words and termination is the same as that of the single word transfer. 14.2.4.7 MICROWIRE Frame Format Figure 14-10 on page 345 shows the MICROWIRE frame format, again for a single frame. Figure 14-11 on page 346 shows the same format when back-to-back frames are transmitted. 344 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Figure 14-10. MICROWIRE Frame Format (Single Frame) SSIClk SSIFss SSIRx MSB LSB 4 to 16 bits output data 0 SSITx MSB LSB 8-bit control MICROWIRE format is very similar to SPI format, except that transmission is half-duplex instead of full-duplex, using a master-slave message passing technique. Each serial transmission begins with an 8-bit control word that is transmitted from the SSI to the off-chip slave device. During this transmission, no incoming data is received by the SSI. After the message has been sent, the off-chip slave decodes it and, after waiting one serial clock after the last bit of the 8-bit control message has been sent, responds with the required data. The returned data is 4 to 16 bits in length, making the total frame length anywhere from 13 to 25 bits. In this configuration, during idle periods: ■ SSIClk is forced Low ■ SSIFss is forced High ■ The transmit data line SSITx is arbitrarily forced Low A transmission is triggered by writing a control byte to the transmit FIFO. The falling edge of SSIFss causes the value contained in the bottom entry of the transmit FIFO to be transferred to the serial shift register of the transmit logic, and the MSB of the 8-bit control frame to be shifted out onto the SSITx pin. SSIFss remains Low for the duration of the frame transmission. The SSIRx pin remains tristated during this transmission. The off-chip serial slave device latches each control bit into its serial shifter on the rising edge of each SSIClk. After the last bit is latched by the slave device, the control byte is decoded during a one clock wait-state, and the slave responds by transmitting data back to the SSI. Each bit is driven onto the SSIRx line on the falling edge of SSIClk. The SSI in turn latches each bit on the rising edge of SSIClk. At the end of the frame, for single transfers, the SSIFss signal is pulled High one clock period after the last bit has been latched in the receive serial shifter, which causes the data to be transferred to the receive FIFO. Note: The off-chip slave device can tristate the receive line either on the falling edge of SSIClk after the LSB has been latched by the receive shifter, or when the SSIFss pin goes High. For continuous transfers, data transmission begins and ends in the same manner as a single transfer. However, the SSIFss line is continuously asserted (held Low) and transmission of data occurs back-to-back. The control byte of the next frame follows directly after the LSB of the received data from the current frame. Each of the received values is transferred from the receive shifter on the falling edge of SSIClk, after the LSB of the frame has been latched into the SSI. November 30, 2007 345 Preliminary LM3S6952 Microcontroller Figure 14-11. MICROWIRE Frame Format (Continuous Transfer) 8-bit control SSIClk SSIFss SSIRx MSB LSB 4 to 16 bits output data 0 SSITx LSB MSB LSB MSB In the MICROWIRE mode, the SSI slave samples the first bit of receive data on the rising edge of SSIClk after SSIFss has gone Low. Masters that drive a free-running SSIClk must ensure that the SSIFss signal has sufficient setup and hold margins with respect to the rising edge of SSIClk. Figure 14-12 on page 346 illustrates these setup and hold time requirements. With respect to the SSIClk rising edge on which the first bit of receive data is to be sampled by the SSI slave, SSIFss must have a setup of at least two times the period of SSIClk on which the SSI operates. With respect to the SSIClk rising edge previous to this edge, SSIFss must have a hold of at least one SSIClk period. Figure 14-12. MICROWIRE Frame Format, SSIFss Input Setup and Hold Requirements SSIClk SSIFss SSIRx First RX data to be sampled by SSI slave tSetup=(2*tSSIClk) tHold=tSSIClk 14.3 Initialization and Configuration To use the SSI, its peripheral clock must be enabled by setting the SSI bit in the RCGC1 register. For each of the frame formats, the SSI is configured using the following steps: 1. Ensure that the SSE bit in the SSICR1 register is disabled before making any configuration changes. 2. Select whether the SSI is a master or slave: a. For master operations, set the SSICR1 register to 0x0000.0000. b. For slave mode (output enabled), set the SSICR1 register to 0x0000.0004. c. For slave mode (output disabled), set the SSICR1 register to 0x0000.000C. 3. Configure the clock prescale divisor by writing the SSICPSR register. 346 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) 4. Write the SSICR0 register with the following configuration: ■ Serial clock rate (SCR) ■ Desired clock phase/polarity, if using Freescale SPI mode (SPH and SPO) ■ The protocol mode: Freescale SPI, TI SSF, MICROWIRE (FRF) ■ The data size (DSS) 5. Enable the SSI by setting the SSE bit in the SSICR1 register. As an example, assume the SSI must be configured to operate with the following parameters: ■ Master operation ■ Freescale SPI mode (SPO=1, SPH=1) ■ 1 Mbps bit rate ■ 8 data bits Assuming the system clock is 20 MHz, the bit rate calculation would be: FSSIClk = FSysClk / (CPSDVSR * (1 + SCR)) 1x106 = 20x106 / (CPSDVSR * (1 + SCR)) In this case, if CPSDVSR=2, SCR must be 9. The configuration sequence would be as follows: 1. Ensure that the SSE bit in the SSICR1 register is disabled. 2. Write the SSICR1 register with a value of 0x0000.0000. 3. Write the SSICPSR register with a value of 0x0000.0002. 4. Write the SSICR0 register with a value of 0x0000.09C7. 5. The SSI is then enabled by setting the SSE bit in the SSICR1 register to 1. 14.4 Register Map Table 14-1 on page 347 lists the SSI registers. The offset listed is a hexadecimal increment to the register’s address, relative to that SSI module’s base address: ■ SSI0: 0x4000.8000 Note: The SSI must be disabled (see the SSE bit in the SSICR1 register) before any of the control registers are reprogrammed. Table 14-1. SSI Register Map See Offset Name Type Reset Description page 0x000 SSICR0 R/W 0x0000.0000 SSI Control 0 349 November 30, 2007 347 Preliminary LM3S6952 Microcontroller See Offset Name Type Reset Description page 0x004 SSICR1 R/W 0x0000.0000 SSI Control 1 351 0x008 SSIDR R/W 0x0000.0000 SSI Data 353 0x00C SSISR RO 0x0000.0003 SSI Status 354 0x010 SSICPSR R/W 0x0000.0000 SSI Clock Prescale 356 0x014 SSIIM R/W 0x0000.0000 SSI Interrupt Mask 357 0x018 SSIRIS RO 0x0000.0008 SSI Raw Interrupt Status 359 0x01C SSIMIS RO 0x0000.0000 SSI Masked Interrupt Status 360 0x020 SSIICR W1C 0x0000.0000 SSI Interrupt Clear 361 0xFD0 SSIPeriphID4 RO 0x0000.0000 SSI Peripheral Identification 4 362 0xFD4 SSIPeriphID5 RO 0x0000.0000 SSI Peripheral Identification 5 363 0xFD8 SSIPeriphID6 RO 0x0000.0000 SSI Peripheral Identification 6 364 0xFDC SSIPeriphID7 RO 0x0000.0000 SSI Peripheral Identification 7 365 0xFE0 SSIPeriphID0 RO 0x0000.0022 SSI Peripheral Identification 0 366 0xFE4 SSIPeriphID1 RO 0x0000.0000 SSI Peripheral Identification 1 367 0xFE8 SSIPeriphID2 RO 0x0000.0018 SSI Peripheral Identification 2 368 0xFEC SSIPeriphID3 RO 0x0000.0001 SSI Peripheral Identification 3 369 0xFF0 SSIPCellID0 RO 0x0000.000D SSI PrimeCell Identification 0 370 0xFF4 SSIPCellID1 RO 0x0000.00F0 SSI PrimeCell Identification 1 371 0xFF8 SSIPCellID2 RO 0x0000.0005 SSI PrimeCell Identification 2 372 0xFFC SSIPCellID3 RO 0x0000.00B1 SSI PrimeCell Identification 3 373 14.5 Register Descriptions The remainder of this section lists and describes the SSI registers, in numerical order by address offset. 348 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 1: SSI Control 0 (SSICR0), offset 0x000 SSICR0 is control register 0 and contains bit fields that control various functions within the SSI module. Functionality such as protocol mode, clock rate, and data size are configured in this register. SSI Control 0 (SSICR0) SSI0 base: 0x4000.8000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 SCR SPH SPO FRF DSS Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 SSI Serial Clock Rate The value SCR is used to generate the transmit and receive bit rate of the SSI. The bit rate is: BR=FSSIClk/(CPSDVSR * (1 + SCR)) where CPSDVSR is an even value from 2-254 programmed in the SSICPSR register, and SCR is a value from 0-255. 15:8 SCR R/W 0x0000 SSI Serial Clock Phase This bit is only applicable to the Freescale SPI Format. The SPH control bit selects the clock edge that captures data and allows it to change state. It has the most impact on the first bit transmitted by either allowing or not allowing a clock transition before the first data capture edge. When the SPH bit is 0, data is captured on the first clock edge transition. If SPH is 1, data is captured on the second clock edge transition. 7 SPH R/W 0 SSI Serial Clock Polarity This bit is only applicable to the Freescale SPI Format. When the SPO bit is 0, it produces a steady state Low value on the SSIClk pin. If SPO is 1, a steady state High value is placed on the SSIClk pin when data is not being transferred. 6 SPO R/W 0 November 30, 2007 349 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description SSI Frame Format Select The FRF values are defined as follows: Value Frame Format 0x0 Freescale SPI Frame Format 0x1 Texas Intruments Synchronous Serial Frame Format 0x2 MICROWIRE Frame Format 0x3 Reserved 5:4 FRF R/W 0x0 SSI Data Size Select The DSS values are defined as follows: Value Data Size 0x0-0x2 Reserved 0x3 4-bit data 0x4 5-bit data 0x5 6-bit data 0x6 7-bit data 0x7 8-bit data 0x8 9-bit data 0x9 10-bit data 0xA 11-bit data 0xB 12-bit data 0xC 13-bit data 0xD 14-bit data 0xE 15-bit data 0xF 16-bit data 3:0 DSS R/W 0x00 350 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 2: SSI Control 1 (SSICR1), offset 0x004 SSICR1 is control register 1 and contains bit fields that control various functions within the SSI module. Master and slave mode functionality is controlled by this register. SSI Control 1 (SSICR1) SSI0 base: 0x4000.8000 Offset 0x004 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SOD MS SSE LBM Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SSI Slave Mode Output Disable This bit is relevant only in the Slave mode (MS=1). In multiple-slave systems, it is possible for the SSI master to broadcast a message to all slaves in the system while ensuring that only one slave drives data onto the serial output line. In such systems, the TXD lines from multiple slaves could be tied together. To operate in such a system, the SOD bit can be configured so that the SSI slave does not drive the SSITx pin. The SOD values are defined as follows: Value Description 0 SSI can drive SSITx output in Slave Output mode. 1 SSI must not drive the SSITx output in Slave mode. 3 SOD R/W 0 SSI Master/Slave Select This bit selects Master or Slave mode and can be modified only when SSI is disabled (SSE=0). The MS values are defined as follows: Value Description 0 Device configured as a master. 1 Device configured as a slave. 2 MS R/W 0 November 30, 2007 351 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description SSI Synchronous Serial Port Enable Setting this bit enables SSI operation. The SSE values are defined as follows: Value Description 0 SSI operation disabled. 1 SSI operation enabled. Note: This bit must be set to 0 before any control registers are reprogrammed. 1 SSE R/W 0 SSI Loopback Mode Setting this bit enables Loopback Test mode. The LBM values are defined as follows: Value Description 0 Normal serial port operation enabled. Output of the transmit serial shift register is connected internally to the input of the receive serial shift register. 1 0 LBM R/W 0 352 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 3: SSI Data (SSIDR), offset 0x008 SSIDR is the data register and is 16-bits wide. When SSIDR is read, the entry in the receive FIFO (pointed to by the current FIFO read pointer) is accessed. As data values are removed by the SSI receive logic from the incoming data frame, they are placed into the entry in the receive FIFO (pointed to by the current FIFO write pointer). When SSIDR is written to, the entry in the transmit FIFO (pointed to by the write pointer) is written to. Data values are removed from the transmit FIFO one value at a time by the transmit logic. It is loaded into the transmit serial shifter, then serially shifted out onto the SSITx pin at the programmed bit rate. When a data size of less than 16 bits is selected, the user must right-justify data written to the transmit FIFO. The transmit logic ignores the unused bits. Received data less than 16 bits is automatically right-justified in the receive buffer. When the SSI is programmed for MICROWIRE frame format, the default size for transmit data is eight bits (the most significant byte is ignored). The receive data size is controlled by the programmer. The transmit FIFO and the receive FIFO are not cleared even when the SSE bit in the SSICR1 register is set to zero. This allows the software to fill the transmit FIFO before enabling the SSI. SSI Data (SSIDR) SSI0 base: 0x4000.8000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DATA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0000 SSI Receive/Transmit Data A read operation reads the receive FIFO. A write operation writes the transmit FIFO. Software must right-justify data when the SSI is programmed for a data size that is less than 16 bits. Unused bits at the top are ignored by the transmit logic. The receive logic automatically right-justifies the data. 15:0 DATA R/W 0x0000 November 30, 2007 353 Preliminary LM3S6952 Microcontroller Register 4: SSI Status (SSISR), offset 0x00C SSISR is a status register that contains bits that indicate the FIFO fill status and the SSI busy status. SSI Status (SSISR) SSI0 base: 0x4000.8000 Offset 0x00C Type RO, reset 0x0000.0003 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved BSY RFF RNE TNF TFE Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R0 Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:5 reserved RO 0x00 SSI Busy Bit The BSY values are defined as follows: Value Description 0 SSI is idle. SSI is currently transmitting and/or receiving a frame, or the transmit FIFO is not empty. 1 4 BSY RO 0 SSI Receive FIFO Full The RFF values are defined as follows: Value Description 0 Receive FIFO is not full. 1 Receive FIFO is full. 3 RFF RO 0 SSI Receive FIFO Not Empty The RNE values are defined as follows: Value Description 0 Receive FIFO is empty. 1 Receive FIFO is not empty. 2 RNE RO 0 SSI Transmit FIFO Not Full The TNF values are defined as follows: Value Description 0 Transmit FIFO is full. 1 Transmit FIFO is not full. 1 TNF RO 1 354 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Bit/Field Name Type Reset Description SSI Transmit FIFO Empty The TFE values are defined as follows: Value Description 0 Transmit FIFO is not empty. 1 Transmit FIFO is empty. 0 TFE R0 1 November 30, 2007 355 Preliminary LM3S6952 Microcontroller Register 5: SSI Clock Prescale (SSICPSR), offset 0x010 SSICPSR is the clock prescale register and specifies the division factor by which the system clock must be internally divided before further use. The value programmed into this register must be an even number between 2 and 254. The least-significant bit of the programmed number is hard-coded to zero. If an odd number is written to this register, data read back from this register has the least-significant bit as zero. SSI Clock Prescale (SSICPSR) SSI0 base: 0x4000.8000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CPSDVSR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Clock Prescale Divisor This value must be an even number from 2 to 254, depending on the frequency of SSIClk. The LSB always returns 0 on reads. 7:0 CPSDVSR R/W 0x00 356 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 6: SSI Interrupt Mask (SSIIM), offset 0x014 The SSIIM register is the interrupt mask set or clear register. It is a read/write register and all bits are cleared to 0 on reset. On a read, this register gives the current value of the mask on the relevant interrupt. A write of 1 to the particular bit sets the mask, enabling the interrupt to be read. A write of 0 clears the corresponding mask. SSI Interrupt Mask (SSIIM) SSI0 base: 0x4000.8000 Offset 0x014 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TXIM RXIM RTIM RORIM Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SSI Transmit FIFO Interrupt Mask The TXIM values are defined as follows: Value Description 0 TX FIFO half-full or less condition interrupt is masked. 1 TX FIFO half-full or less condition interrupt is not masked. 3 TXIM R/W 0 SSI Receive FIFO Interrupt Mask The RXIM values are defined as follows: Value Description 0 RX FIFO half-full or more condition interrupt is masked. 1 RX FIFO half-full or more condition interrupt is not masked. 2 RXIM R/W 0 SSI Receive Time-Out Interrupt Mask The RTIM values are defined as follows: Value Description 0 RX FIFO time-out interrupt is masked. 1 RX FIFO time-out interrupt is not masked. 1 RTIM R/W 0 November 30, 2007 357 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description SSI Receive Overrun Interrupt Mask The RORIM values are defined as follows: Value Description 0 RX FIFO overrun interrupt is masked. 1 RX FIFO overrun interrupt is not masked. 0 RORIM R/W 0 358 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 7: SSI Raw Interrupt Status (SSIRIS), offset 0x018 The SSIRIS register is the raw interrupt status register. On a read, this register gives the current raw status value of the corresponding interrupt prior to masking. A write has no effect. SSI Raw Interrupt Status (SSIRIS) SSI0 base: 0x4000.8000 Offset 0x018 Type RO, reset 0x0000.0008 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TXRIS RXRIS RTRIS RORRIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 SSI Transmit FIFO Raw Interrupt Status Indicates that the transmit FIFO is half full or less, when set. 3 TXRIS RO 1 SSI Receive FIFO Raw Interrupt Status Indicates that the receive FIFO is half full or more, when set. 2 RXRIS RO 0 SSI Receive Time-Out Raw Interrupt Status Indicates that the receive time-out has occurred, when set. 1 RTRIS RO 0 SSI Receive Overrun Raw Interrupt Status Indicates that the receive FIFO has overflowed, when set. 0 RORRIS RO 0 November 30, 2007 359 Preliminary LM3S6952 Microcontroller Register 8: SSI Masked Interrupt Status (SSIMIS), offset 0x01C The SSIMIS register is the masked interrupt status register. On a read, this register gives the current masked status value of the corresponding interrupt. A write has no effect. SSI Masked Interrupt Status (SSIMIS) SSI0 base: 0x4000.8000 Offset 0x01C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TXMIS RXMIS RTMIS RORMIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0 SSI Transmit FIFO Masked Interrupt Status Indicates that the transmit FIFO is half full or less, when set. 3 TXMIS RO 0 SSI Receive FIFO Masked Interrupt Status Indicates that the receive FIFO is half full or more, when set. 2 RXMIS RO 0 SSI Receive Time-Out Masked Interrupt Status Indicates that the receive time-out has occurred, when set. 1 RTMIS RO 0 SSI Receive Overrun Masked Interrupt Status Indicates that the receive FIFO has overflowed, when set. 0 RORMIS RO 0 360 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 9: SSI Interrupt Clear (SSIICR), offset 0x020 The SSIICR register is the interrupt clear register. On a write of 1, the corresponding interrupt is cleared. A write of 0 has no effect. SSI Interrupt Clear (SSIICR) SSI0 base: 0x4000.8000 Offset 0x020 Type W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RTIC RORIC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO W1C W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 SSI Receive Time-Out Interrupt Clear The RTIC values are defined as follows: Value Description 0 No effect on interrupt. 1 Clears interrupt. 1 RTIC W1C 0 SSI Receive Overrun Interrupt Clear The RORIC values are defined as follows: Value Description 0 No effect on interrupt. 1 Clears interrupt. 0 RORIC W1C 0 November 30, 2007 361 Preliminary LM3S6952 Microcontroller Register 10: SSI Peripheral Identification 4 (SSIPeriphID4), offset 0xFD0 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 4 (SSIPeriphID4) SSI0 base: 0x4000.8000 Offset 0xFD0 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID4 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register[7:0] Can be used by software to identify the presence of this peripheral. 7:0 PID4 RO 0x00 362 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 11: SSI Peripheral Identification 5 (SSIPeriphID5), offset 0xFD4 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 5 (SSIPeriphID5) SSI0 base: 0x4000.8000 Offset 0xFD4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID5 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register[15:8] Can be used by software to identify the presence of this peripheral. 7:0 PID5 RO 0x00 November 30, 2007 363 Preliminary LM3S6952 Microcontroller Register 12: SSI Peripheral Identification 6 (SSIPeriphID6), offset 0xFD8 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 6 (SSIPeriphID6) SSI0 base: 0x4000.8000 Offset 0xFD8 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID6 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register[23:16] Can be used by software to identify the presence of this peripheral. 7:0 PID6 RO 0x00 364 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 13: SSI Peripheral Identification 7 (SSIPeriphID7), offset 0xFDC The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 7 (SSIPeriphID7) SSI0 base: 0x4000.8000 Offset 0xFDC Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID7 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register[31:24] Can be used by software to identify the presence of this peripheral. 7:0 PID7 RO 0x00 November 30, 2007 365 Preliminary LM3S6952 Microcontroller Register 14: SSI Peripheral Identification 0 (SSIPeriphID0), offset 0xFE0 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 0 (SSIPeriphID0) SSI0 base: 0x4000.8000 Offset 0xFE0 Type RO, reset 0x0000.0022 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0 SSI Peripheral ID Register[7:0] Can be used by software to identify the presence of this peripheral. 7:0 PID0 RO 0x22 366 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 15: SSI Peripheral Identification 1 (SSIPeriphID1), offset 0xFE4 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 1 (SSIPeriphID1) SSI0 base: 0x4000.8000 Offset 0xFE4 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register [15:8] Can be used by software to identify the presence of this peripheral. 7:0 PID1 RO 0x00 November 30, 2007 367 Preliminary LM3S6952 Microcontroller Register 16: SSI Peripheral Identification 2 (SSIPeriphID2), offset 0xFE8 The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 2 (SSIPeriphID2) SSI0 base: 0x4000.8000 Offset 0xFE8 Type RO, reset 0x0000.0018 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register [23:16] Can be used by software to identify the presence of this peripheral. 7:0 PID2 RO 0x18 368 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 17: SSI Peripheral Identification 3 (SSIPeriphID3), offset 0xFEC The SSIPeriphIDn registers are hard-coded and the fields within the register determine the reset value. SSI Peripheral Identification 3 (SSIPeriphID3) SSI0 base: 0x4000.8000 Offset 0xFEC Type RO, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI Peripheral ID Register [31:24] Can be used by software to identify the presence of this peripheral. 7:0 PID3 RO 0x01 November 30, 2007 369 Preliminary LM3S6952 Microcontroller Register 18: SSI PrimeCell Identification 0 (SSIPCellID0), offset 0xFF0 The SSIPCellIDn registers are hard-coded and the fields within the register determine the reset value. SSI PrimeCell Identification 0 (SSIPCellID0) SSI0 base: 0x4000.8000 Offset 0xFF0 Type RO, reset 0x0000.000D 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI PrimeCell ID Register [7:0] Provides software a standard cross-peripheral identification system. 7:0 CID0 RO 0x0D 370 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 19: SSI PrimeCell Identification 1 (SSIPCellID1), offset 0xFF4 The SSIPCellIDn registers are hard-coded and the fields within the register determine the reset value. SSI PrimeCell Identification 1 (SSIPCellID1) SSI0 base: 0x4000.8000 Offset 0xFF4 Type RO, reset 0x0000.00F0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID1 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI PrimeCell ID Register [15:8] Provides software a standard cross-peripheral identification system. 7:0 CID1 RO 0xF0 November 30, 2007 371 Preliminary LM3S6952 Microcontroller Register 20: SSI PrimeCell Identification 2 (SSIPCellID2), offset 0xFF8 The SSIPCellIDn registers are hard-coded and the fields within the register determine the reset value. SSI PrimeCell Identification 2 (SSIPCellID2) SSI0 base: 0x4000.8000 Offset 0xFF8 Type RO, reset 0x0000.0005 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID2 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI PrimeCell ID Register [23:16] Provides software a standard cross-peripheral identification system. 7:0 CID2 RO 0x05 372 November 30, 2007 Preliminary Synchronous Serial Interface (SSI) Register 21: SSI PrimeCell Identification 3 (SSIPCellID3), offset 0xFFC The SSIPCellIDn registers are hard-coded and the fields within the register determine the reset value. SSI PrimeCell Identification 3 (SSIPCellID3) SSI0 base: 0x4000.8000 Offset 0xFFC Type RO, reset 0x0000.00B1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CID3 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 0 1 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SSI PrimeCell ID Register [31:24] Provides software a standard cross-peripheral identification system. 7:0 CID3 RO 0xB1 November 30, 2007 373 Preliminary LM3S6952 Microcontroller 15 Inter-Integrated Circuit (I2C) Interface The Inter-Integrated Circuit (I2C) bus provides bi-directional data transfer through a two-wire design (a serial data line SDA and a serial clock line SCL), and interfaces to external I2C devices such as serial memory (RAMs and ROMs), networking devices, LCDs, tone generators, and so on. The I2C bus may also be used for system testing and diagnostic purposes in product development and manufacture. The LM3S6952 microcontroller includes one I2C module, providing the ability to interact (both send and receive) with other I2C devices on the bus. Devices on the I2C bus can be designated as either a master or a slave. The Stellaris® I2C module supports both sending and receiving data as either a master or a slave, and also supports the simultaneous operation as both a master and a slave. There are a total of four I2C modes: Master Transmit, Master Receive, Slave Transmit, and Slave Receive. The Stellaris® I2C module can operate at two speeds: Standard (100 Kbps) and Fast (400 Kbps). Both the I2C master and slave can generate interrupts; the I2C master generates interrupts when a transmit or receive operation completes (or aborts due to an error) and the I2C slave generates interrupts when data has been sent or requested by a master. 15.1 Block Diagram Figure 15-1. I2C Block Diagram I2C I/O Select I2C Master Core Interrupt I2C Slave Core I2CSCL I2CSDA I2CSDA I2CSCL I2CSDA I2CSCL I2CMSA I2CMCS I2CMDR I2CMTPR I2CMIMR I2CMRIS I2CMICR I2CMCR I2CSOAR I2CSCSR I2CSDR I2CSIM I2CSRIS I2CSMIS I2CMMIS I2CSICR I2C Control 15.2 Functional Description The I2C module is comprised of both master and slave functions which are implemented as separate peripherals. For proper operation, the SDA and SCL pins must be connected to bi-directional open-drain pads. A typical I2C bus configuration is shown in Figure 15-2 on page 375. See “I2C” on page 539 for I2C timing diagrams. 374 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Figure 15-2. I2C Bus Configuration RPUP StellarisTM I2CSCL I2CSDA RPUP 3rd Party Device with I2C Interface SCL SDA I2C Bus SCL SDA 3rd Party Device with I2C Interface SCL SDA 15.2.1 I2C Bus Functional Overview The I2C bus uses only two signals: SDA and SCL, named I2CSDA and I2CSCL on Stellaris® microcontrollers. SDA is the bi-directional serial data line and SCL is the bi-directional serial clock line. The bus is considered idle when both lines are high. Every transaction on the I2C bus is nine bits long, consisting of eight data bits and a single acknowledge bit. The number of bytes per transfer (defined as the time between a valid START and STOP condition, described in “START and STOP Conditions” on page 375) is unrestricted, but each byte has to be followed by an acknowledge bit, and data must be transferred MSB first. When a receiver cannot receive another complete byte, it can hold the clock line SCL Low and force the transmitter into a wait state. The data transfer continues when the receiver releases the clock SCL. 15.2.1.1 START and STOP Conditions The protocol of the I2C bus defines two states to begin and end a transaction: START and STOP. A high-to-low transition on the SDA line while the SCL is high is defined as a START condition, and a low-to-high transition on the SDA line while SCL is high is defined as a STOP condition. The bus is considered busy after a START condition and free after a STOP condition. See Figure 15-3 on page 375. Figure 15-3. START and STOP Conditions START condition SDA SCL STOP condition SDA SCL 15.2.1.2 Data Format with 7-Bit Address Data transfers follow the format shown in Figure 15-4 on page 376. After the START condition, a slave address is sent. This address is 7-bits long followed by an eighth bit, which is a data direction bit (R/S bit in the I2CMSA register). A zero indicates a transmit operation (send), and a one indicates a request for data (receive). A data transfer is always terminated by a STOP condition generated by the master, however, a master can initiate communications with another device on the bus by generating a repeated START condition and addressing another slave without first generating a STOP condition. Various combinations of receive/send formats are then possible within a single transfer. November 30, 2007 375 Preliminary LM3S6952 Microcontroller Figure 15-4. Complete Data Transfer with a 7-Bit Address Slave address Data SDA MSB LSB R/S ACK MSB LSB ACK SCL 1 2 7 8 9 1 2 7 8 9 The first seven bits of the first byte make up the slave address (see Figure 15-5 on page 376). The eighth bit determines the direction of the message. A zero in the R/S position of the first byte means that the master will write (send) data to the selected slave, and a one in this position means that the master will receive data from the slave. Figure 15-5. R/S Bit in First Byte R/S LSB Slave address MSB 15.2.1.3 Data Validity The data on the SDA line must be stable during the high period of the clock, and the data line can only change when SCL is low (see Figure 15-6 on page 376). Figure 15-6. Data Validity During Bit Transfer on the I2C Bus Change of data allowed Dataline stable SDA SCL 15.2.1.4 Acknowledge All bus transactions have a required acknowledge clock cycle that is generated by the master. During the acknowledge cycle, the transmitter (which can be the master or slave) releases the SDA line. To acknowledge the transaction, the receiver must pull down SDA during the acknowledge clock cycle. The data sent out by the receiver during the acknowledge cycle must comply with the data validity requirements described in “Data Validity” on page 376. When a slave receiver does not acknowledge the slave address, SDA must be left high by the slave so that the master can generate a STOP condition and abort the current transfer. If the master device is acting as a receiver during a transfer, it is responsible for acknowledging each transfer made by the slave. Since the master controls the number of bytes in the transfer, it signals the end of data to the slave transmitter by not generating an acknowledge on the last data byte. The slave transmitter must then release SDA to allow the master to generate the STOP or a repeated START condition. 376 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface 15.2.1.5 Arbitration A master may start a transfer only if the bus is idle. It's possible for two or more masters to generate a START condition within minimum hold time of the START condition. In these situations, an arbitration scheme takes place on the SDA line, while SCL is high. During arbitration, the first of the competing master devices to place a '1' (high) on SDA while another master transmits a '0' (low) will switch off its data output stage and retire until the bus is idle again. Arbitration can take place over several bits. Its first stage is a comparison of address bits, and if both masters are trying to address the same device, arbitration continues on to the comparison of data bits. 15.2.2 Available Speed Modes The I2C clock rate is determined by the parameters: CLK_PRD, TIMER_PRD, SCL_LP, and SCL_HP. where: CLK_PRD is the system clock period SCL_LP is the low phase of SCL (fixed at 6) SCL_HP is the high phase of SCL (fixed at 4) TIMER_PRD is the programmed value in the I2C Master Timer Period (I2CMTPR) register (see page 394). The I2C clock period is calculated as follows: SCL_PERIOD = 2*(1 + TIMER_PRD)*(SCL_LP + SCL_HP)*CLK_PRD For example: CLK_PRD = 50 ns TIMER_PRD = 2 SCL_LP=6 SCL_HP=4 yields a SCL frequency of: 1/T = 333 Khz Table 15-1 on page 377 gives examples of timer period, system clock, and speed mode (Standard or Fast). Table 15-1. Examples of I2C Master Timer Period versus Speed Mode System Clock Timer Period Standard Mode Timer Period Fast Mode 4 Mhz 0x01 100 Kbps - - 6 Mhz 0x02 100 Kbps - - 12.5 Mhz 0x06 89 Kbps 0x01 312 Kbps 16.7 Mhz 0x08 93 Kbps 0x02 278 Kbps 20 Mhz 0x09 100 Kbps 0x02 333 Kbps 25 Mhz 0x0C 96.2 Kbps 0x03 312 Kbps 33Mhz 0x10 97.1 Kbps 0x04 330 Kbps 40Mhz 0x13 100 Kbps 0x04 400 Kbps November 30, 2007 377 Preliminary LM3S6952 Microcontroller System Clock Timer Period Standard Mode Timer Period Fast Mode 50Mhz 0x18 100 Kbps 0x06 357 Kbps 15.2.3 Interrupts The I2C can generate interrupts when the following conditions are observed: ■ Master transaction completed ■ Master transaction error ■ Slave transaction received ■ Slave transaction requested There is a separate interrupt signal for the I2C master and I2C modules. While both modules can generate interrupts for multiple conditions, only a single interrupt signal is sent to the interrupt controller. 15.2.3.1 I2C Master Interrupts The I2C master module generates an interrupt when a transaction completes (either transmit or receive), or when an error occurs during a transaction. To enable the I2C master interrupt, software must write a '1' to the I2C Master Interrupt Mask (I2CMIMR) register. When an interrupt condition is met, software must check the ERROR bit in the I2C Master Control/Status (I2CMCS) register to verify that an error didn't occur during the last transaction. An error condition is asserted if the last transaction wasn't acknowledge by the slave or if the master was forced to give up ownership of the bus due to a lost arbitration round with another master. If an error is not detected, the application can proceed with the transfer. The interrupt is cleared by writing a '1' to the I2C Master Interrupt Clear (I2CMICR) register. If the application doesn't require the use of interrupts, the raw interrupt status is always visible via the I2C Master Raw Interrupt Status (I2CMRIS) register. 15.2.3.2 I2C Slave Interrupts The slave module generates interrupts as it receives requests from an I2C master. To enable the I2C slave interrupt, write a '1' to the I2C Slave Interrupt Mask (I2CSIMR) register. Software determines whether the module should write (transmit) or read (receive) data from the I2C Slave Data (I2CSDR) register, by checking the RREQ and TREQ bits of the I2C Slave Control/Status (I2CSCSR) register. If the slave module is in receive mode and the first byte of a transfer is received, the FBR bit is set along with the RREQ bit. The interrupt is cleared by writing a '1' to the I2C Slave Interrupt Clear (I2CSICR) register. If the application doesn't require the use of interrupts, the raw interrupt status is always visible via the I2C Slave Raw Interrupt Status (I2CSRIS) register. 15.2.4 Loopback Operation The I2C modules can be placed into an internal loopback mode for diagnostic or debug work. This is accomplished by setting the LPBK bit in the I2C Master Configuration (I2CMCR) register. In loopback mode, the SDA and SCL signals from the master and slave modules are tied together. 378 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface 15.2.5 Command Sequence Flow Charts This section details the steps required to perform the various I2C transfer types in both master and slave mode. 15.2.5.1 I2C Master Command Sequences The figures that follow show the command sequences available for the I2C master. Figure 15-7. Master Single SEND Idle Write Slave Address to I2CMSA Write data to I2CMDR Read I2CMCS Sequence may be omitted in a Single Master system BUSBSY bit=0? NO Write ---0-111 to I2CMCS YES Read I2CMCS BUSY bit=0? ERROR bit=0? YES Error Service Idle YES NO NO November 30, 2007 379 Preliminary LM3S6952 Microcontroller Figure 15-8. Master Single RECEIVE Idle Write Slave Address to I2CMSA Read I2CMCS Sequence may be omitted in a Single Master system BUSBSY bit=0? NO Write ---00111 to I2CMCS YES Read I2CMCS BUSY bit=0? ERROR bit=0? YES Error Service Idle NO NO Read data from I2CMDR YES 380 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Figure 15-9. Master Burst SEND Idle Write Slave Address to I2CMSA Write data to I2CMDR Read I2CMCS BUSBSY bit=0? YES Write ---0-011 to I2CMCS NO Read I2CMCS BUSY bit=0? YES ERROR bit=0? YES Write data to ARBLST bit=1? I2CMDR Write ---0-100 to Index=n? I2CMCS NO Error Service Idle YES Write ---0-001 to I2CMCS Write ---0-101 to I2CMCS YES Read I2CMCS BUSY bit=0? ERROR bit=0? YES NO Idle YES Error Service NO NO NO NO Sequence may be omitted in a Single Master system November 30, 2007 381 Preliminary LM3S6952 Microcontroller Figure 15-10. Master Burst RECEIVE Idle Write Slave Address to I2CMSA Read I2CMCS BUSBSY bit=0? NO Write ---01011 to I2CMCS YES Read I2CMCS BUSY bit=0? NO ERROR bit=0? YES ARBLST bit=1? Write ---0-100 to I2CMCS NO Error Service YES Idle Read data from I2CMDR Index=m-1? Write ---00101 to I2CMCS YES Idle Read data from Error Service I2CMDR ERROR bit=0? YES Write ---01001 to I2CMCS Read I2CMCS BUSY bit=0? NO YES Sequence may be omitted in a Single Master system NO NO NO 382 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Figure 15-11. Master Burst RECEIVE after Burst SEND Idle Master operates in Master Transmit mode STOP condition is not generated Write Slave Address to I2CMSA Write ---01011 to I2CMCS Master operates in Master Receive mode Idle Repeated START condition is generated with changing data direction November 30, 2007 383 Preliminary LM3S6952 Microcontroller Figure 15-12. Master Burst SEND after Burst RECEIVE Idle Master operates in Master Receive mode STOP condition is not generated Write Slave Address to I2CMSA Write ---0-011 to I2CMCS Master operates in Master Transmit mode Idle Repeated START condition is generated with changing data direction 15.2.5.2 I2C Slave Command Sequences Figure 15-13 on page 385 presents the command sequence available for the I2C slave. 384 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Figure 15-13. Slave Command Sequence Idle Write OWN Slave Address to I2CSOAR Write -------1 to I2CSCSR Read I2CSCSR RREQ bit=1? Read data from I2CSDR YES TREQ bit=1? NO Write data to I2CSDR YES NO FBR is also valid 15.3 Initialization and Configuration The following example shows how to configure the I2C module to send a single byte as a master. This assumes the system clock is 20 MHz. 1. Enable the I2C clock by writing a value of 0x0000.1000 to the RCGC1 register in the System Control module. 2. Enable the clock to the appropriate GPIO module via the RCGC2 register in the System Control module. 3. In the GPIO module, enable the appropriate pins for their alternate function using the GPIOAFSEL register. Also, be sure to enable the same pins for Open Drain operation. 4. Initialize the I2C Master by writing the I2CMCR register with a value of 0x0000.0020. 5. Set the desired SCL clock speed of 100 Kbps by writing the I2CMTPR register with the correct value. The value written to the I2CMTPR register represents the number of system clock periods in one SCL clock period. The TPR value is determined by the following equation: November 30, 2007 385 Preliminary LM3S6952 Microcontroller TPR = (System Clock / (2 * (SCL_LP + SCL_HP) * SCL_CLK)) - 1; TPR = (20MHz / (2 * (6 + 4) * 100000)) - 1; TPR = 9 Write the I2CMTPR register with the value of 0x0000.0009. 6. Specify the slave address of the master and that the next operation will be a Send by writing the I2CMSA register with a value of 0x0000.0076. This sets the slave address to 0x3B. 7. Place data (byte) to be sent in the data register by writing the I2CMDR register with the desired data. 8. Initiate a single byte send of the data from Master to Slave by writing the I2CMCS register with a value of 0x0000.0007 (STOP, START, RUN). 9. Wait until the transmission completes by polling the I2CMCS register’s BUSBSY bit until it has been cleared. 15.4 I2C Register Map Table 15-2 on page 386 lists the I2C registers. All addresses given are relative to the I2C base addresses for the master and slave: ■ I2C Master 0: 0x4002.0000 ■ I2C Slave 0: 0x4002.0800 Table 15-2. Inter-Integrated Circuit (I2C) Interface Register Map See Offset Name Type Reset Description page I2C Master 0x000 I2CMSA R/W 0x0000.0000 I2C Master Slave Address 388 0x004 I2CMCS R/W 0x0000.0000 I2C Master Control/Status 389 0x008 I2CMDR R/W 0x0000.0000 I2C Master Data 393 0x00C I2CMTPR R/W 0x0000.0001 I2C Master Timer Period 394 0x010 I2CMIMR R/W 0x0000.0000 I2C Master Interrupt Mask 395 0x014 I2CMRIS RO 0x0000.0000 I2C Master Raw Interrupt Status 396 0x018 I2CMMIS RO 0x0000.0000 I2C Master Masked Interrupt Status 397 0x01C I2CMICR WO 0x0000.0000 I2C Master Interrupt Clear 398 0x020 I2CMCR R/W 0x0000.0000 I2C Master Configuration 399 I2C Slave 0x000 I2CSOAR R/W 0x0000.0000 I2C Slave Own Address 401 0x004 I2CSCSR RO 0x0000.0000 I2C Slave Control/Status 402 0x008 I2CSDR R/W 0x0000.0000 I2C Slave Data 404 0x00C I2CSIMR R/W 0x0000.0000 I2C Slave Interrupt Mask 405 386 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface See Offset Name Type Reset Description page 0x010 I2CSRIS RO 0x0000.0000 I2C Slave Raw Interrupt Status 406 0x014 I2CSMIS RO 0x0000.0000 I2C Slave Masked Interrupt Status 407 0x018 I2CSICR WO 0x0000.0000 I2C Slave Interrupt Clear 408 15.5 Register Descriptions (I2C Master) The remainder of this section lists and describes the I2C master registers, in numerical order by address offset. See also “Register Descriptions (I2C Slave)” on page 400. November 30, 2007 387 Preliminary LM3S6952 Microcontroller Register 1: I2C Master Slave Address (I2CMSA), offset 0x000 This register consists of eight bits: seven address bits (A6-A0), and a Receive/Send bit, which determines if the next operation is a Receive (High), or Send (Low). I2C Master Slave Address (I2CMSA) I2C Master 0 base: 0x4002.0000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SA R/S Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 I2C Slave Address This field specifies bits A6 through A0 of the slave address. 7:1 SA R/W 0 Receive/Send The R/S bit specifies if the next operation is a Receive (High) or Send (Low). Value Description 0 Send. 1 Receive. 0 R/S R/W 0 388 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 2: I2C Master Control/Status (I2CMCS), offset 0x004 This register accesses four control bits when written, and accesses seven status bits when read. The status register consists of seven bits, which when read determine the state of the I2C bus controller. The control register consists of four bits: the RUN, START, STOP, and ACK bits. The START bit causes the generation of the START, or REPEATED START condition. The STOP bit determines if the cycle stops at the end of the data cycle, or continues on to a burst. To generate a single send cycle, the I2C Master Slave Address (I2CMSA) register is written with the desired address, the R/S bit is set to 0, and the Control register is written with ACK=X (0 or 1), STOP=1, START=1, and RUN=1 to perform the operation and stop. When the operation is completed (or aborted due an error), the interrupt pin becomes active and the data may be read from the I2CMDR register. When the I2C module operates in Master receiver mode, the ACK bit must be set normally to logic 1. This causes the I2C bus controller to send an acknowledge automatically after each byte. This bit must be reset when the I2C bus controller requires no further data to be sent from the slave transmitter. Read-Only Status Register I2C Master Control/Status (I2CMCS) I2C Master 0 base: 0x4002.0000 Offset 0x004 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved BUSBSY IDLE ARBLST DATACK ADRACK ERROR BUSY Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0x00 Bus Busy This bit specifies the state of the I2C bus. If set, the bus is busy; otherwise, the bus is idle. The bit changes based on the START and STOP conditions. 6 BUSBSY RO 0 I2C Idle This bit specifies the I2C controller state. If set, the controller is idle; otherwise the controller is not idle. 5 IDLE RO 0 Arbitration Lost This bit specifies the result of bus arbitration. If set, the controller lost arbitration; otherwise, the controller won arbitration. 4 ARBLST RO 0 November 30, 2007 389 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Acknowledge Data This bit specifies the result of the last data operation. If set, the transmitted data was not acknowledged; otherwise, the data was acknowledged. 3 DATACK RO 0 Acknowledge Address This bit specifies the result of the last address operation. If set, the transmitted address was not acknowledged; otherwise, the address was acknowledged. 2 ADRACK RO 0 Error This bit specifies the result of the last bus operation. If set, an error occurred on the last operation; otherwise, no error was detected. The error can be from the slave address not being acknowledged, the transmit data not being acknowledged, or because the controller lost arbitration. 1 ERROR RO 0 I2C Busy This bit specifies the state of the controller. If set, the controller is busy; otherwise, the controller is idle. When the BUSY bit is set, the other status bits are not valid. 0 BUSY RO 0 Write-Only Control Register I2C Master Control/Status (I2CMCS) I2C Master 0 base: 0x4002.0000 Offset 0x004 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ACK STOP START RUN Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved WO 0x00 Data Acknowledge Enable When set, causes received data byte to be acknowledged automatically by the master. See field decoding in Table 15-3 on page 391. 3 ACK WO 0 Generate STOP When set, causes the generation of the STOP condition. See field decoding in Table 15-3 on page 391. 2 STOP WO 0 390 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Bit/Field Name Type Reset Description Generate START When set, causes the generation of a START or repeated START condition. See field decoding in Table 15-3 on page 391. 1 START WO 0 I2C Master Enable When set, allows the master to send or receive data. See field decoding in Table 15-3 on page 391. 0 RUN WO 0 Table 15-3. Write Field Decoding for I2CMCS[3:0] Field (Sheet 1 of 3) Current I2CMSA[0] I2CMCS[3:0] Description State R/S ACK STOP START RUN START condition followed by SEND (master goes to the Master Transmit state). Idle 0 Xa 0 1 1 START condition followed by a SEND and STOP condition (master remains in Idle state). 0 X 1 1 1 START condition followed by RECEIVE operation with negative ACK (master goes to the Master Receive state). 1 0 0 1 1 START condition followed by RECEIVE and STOP condition (master remains in Idle state). 1 0 1 1 1 START condition followed by RECEIVE (master goes to the Master Receive state). 1 1 0 1 1 1 1 1 1 1 Illegal. All other combinations not listed are non-operations. NOP. SEND operation (master remains in Master Transmit state). Master X X 0 0 1 Transmit X X 1 0 0 STOP condition (master goes to Idle state). SEND followed by STOP condition (master goes to Idle state). X X 1 0 1 Repeated START condition followed by a SEND (master remains in Master Transmit state). 0 X 0 1 1 Repeated START condition followed by SEND and STOP condition (master goes to Idle state). 0 X 1 1 1 Repeated START condition followed by a RECEIVE operation with a negative ACK (master goes to Master Receive state). 1 0 0 1 1 Repeated START condition followed by a SEND and STOP condition (master goes to Idle state). 1 0 1 1 1 Repeated START condition followed by RECEIVE (master goes to Master Receive state). 1 1 0 1 1 1 1 1 1 1 Illegal. All other combinations not listed are non-operations. NOP. November 30, 2007 391 Preliminary LM3S6952 Microcontroller Current I2CMSA[0] I2CMCS[3:0] Description State R/S ACK STOP START RUN RECEIVE operation with negative ACK (master remains in Master Receive state). Master X 0 0 0 1 Receive X X 1 0 0 STOP condition (master goes to Idle state).b RECEIVE followed by STOP condition (master goes to Idle state). X 0 1 0 1 RECEIVE operation (master remains in Master Receive state). X 1 0 0 1 X 1 1 0 1 Illegal. Repeated START condition followed by RECEIVE operation with a negative ACK (master remains in Master Receive state). 1 0 0 1 1 Repeated START condition followed by RECEIVE and STOP condition (master goes to Idle state). 1 0 1 1 1 Repeated START condition followed by RECEIVE (master remains in Master Receive state). 1 1 0 1 1 Repeated START condition followed by SEND (master goes to Master Transmit state). 0 X 0 1 1 Repeated START condition followed by SEND and STOP condition (master goes to Idle state). 0 X 1 1 1 All other combinations not listed are non-operations. NOP. a. An X in a table cell indicates the bit can be 0 or 1. b. In Master Receive mode, a STOP condition should be generated only after a Data Negative Acknowledge executed by the master or an Address Negative Acknowledge executed by the slave. 392 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 3: I2C Master Data (I2CMDR), offset 0x008 This register contains the data to be transmitted when in the Master Transmit state, and the data received when in the Master Receive state. I2C Master Data (I2CMDR) I2C Master 0 base: 0x4002.0000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DATA Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Data Transferred Data transferred during transaction. 7:0 DATA R/W 0x00 November 30, 2007 393 Preliminary LM3S6952 Microcontroller Register 4: I2C Master Timer Period (I2CMTPR), offset 0x00C This register specifies the period of the SCL clock. I2C Master Timer Period (I2CMTPR) I2C Master 0 base: 0x4002.0000 Offset 0x00C Type R/W, reset 0x0000.0001 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TPR Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 SCL Clock Period This field specifies the period of the SCL clock. SCL_PRD = 2*(1 + TPR)*(SCL_LP + SCL_HP)*CLK_PRD where: SCL_PRD is the SCL line period (I2C clock). TPR is the Timer Period register value (range of 1 to 255). SCL_LP is the SCL Low period (fixed at 6). SCL_HP is the SCL High period (fixed at 4). 7:0 TPR R/W 0x1 394 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 5: I2C Master Interrupt Mask (I2CMIMR), offset 0x010 This register controls whether a raw interrupt is promoted to a controller interrupt. I2C Master Interrupt Mask (I2CMIMR) I2C Master 0 base: 0x4002.0000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IM Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Interrupt Mask This bit controls whether a raw interrupt is promoted to a controller interrupt. If set, the interrupt is not masked and the interrupt is promoted; otherwise, the interrupt is masked. 0 IM R/W 0 November 30, 2007 395 Preliminary LM3S6952 Microcontroller Register 6: I2C Master Raw Interrupt Status (I2CMRIS), offset 0x014 This register specifies whether an interrupt is pending. I2C Master Raw Interrupt Status (I2CMRIS) I2C Master 0 base: 0x4002.0000 Offset 0x014 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Raw Interrupt Status This bit specifies the raw interrupt state (prior to masking) of the I2C master block. If set, an interrupt is pending; otherwise, an interrupt is not pending. 0 RIS RO 0 396 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 7: I2C Master Masked Interrupt Status (I2CMMIS), offset 0x018 This register specifies whether an interrupt was signaled. I2C Master Masked Interrupt Status (I2CMMIS) I2C Master 0 base: 0x4002.0000 Offset 0x018 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Masked Interrupt Status This bit specifies the raw interrupt state (after masking) of the I2C master block. If set, an interrupt was signaled; otherwise, an interrupt has not been generated since the bit was last cleared. 0 MIS RO 0 November 30, 2007 397 Preliminary LM3S6952 Microcontroller Register 8: I2C Master Interrupt Clear (I2CMICR), offset 0x01C This register clears the raw interrupt. I2C Master Interrupt Clear (I2CMICR) I2C Master 0 base: 0x4002.0000 Offset 0x01C Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Interrupt Clear This bit controls the clearing of the raw interrupt. A write of 1 clears the interrupt; otherwise, a write of 0 has no affect on the interrupt state. A read of this register returns no meaningful data. 0 IC WO 0 398 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 9: I2C Master Configuration (I2CMCR), offset 0x020 This register configures the mode (Master or Slave) and sets the interface for test mode loopback. I2C Master Configuration (I2CMCR) I2C Master 0 base: 0x4002.0000 Offset 0x020 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved SFE MFE reserved LPBK Type RO RO RO RO RO RO RO RO RO RO R/W R/W RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 I2C Slave Function Enable This bit specifies whether the interface may operate in Slave mode. If set, Slave mode is enabled; otherwise, Slave mode is disabled. 5 SFE R/W 0 I2C Master Function Enable This bit specifies whether the interface may operate in Master mode. If set, Master mode is enabled; otherwise, Master mode is disabled and the interface clock is disabled. 4 MFE R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:1 reserved RO 0x00 I2C Loopback This bit specifies whether the interface is operating normally or in Loopback mode. If set, the device is put in a test mode loopback configuration; otherwise, the device operates normally. 0 LPBK R/W 0 November 30, 2007 399 Preliminary LM3S6952 Microcontroller 15.6 Register Descriptions (I2C Slave) The remainder of this section lists and describes the I2C slave registers, in numerical order by address offset. See also “Register Descriptions (I2C Master)” on page 387. 400 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 10: I2C Slave Own Address (I2CSOAR), offset 0x000 This register consists of seven address bits that identify the Stellaris® I2C device on the I2C bus. I2C Slave Own Address (I2CSOAR) I2C Slave 0 base: 0x4002.0800 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OAR Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0x00 I2C Slave Own Address This field specifies bits A6 through A0 of the slave address. 6:0 OAR R/W 0x00 November 30, 2007 401 Preliminary LM3S6952 Microcontroller Register 11: I2C Slave Control/Status (I2CSCSR), offset 0x004 This register accesses one control bit when written, and three status bits when read. The read-only Status register consists of three bits: the FBR, RREQ, and TREQ bits. The First Byte Received (FBR) bit is set only after the Stellaris® device detects its own slave address and receives the first data byte from the I2C master. The Receive Request (RREQ) bit indicates that the Stellaris® I2C device has received a data byte from an I2C master. Read one data byte from the I2C Slave Data (I2CSDR) register to clear the RREQ bit. The Transmit Request (TREQ) bit indicates that the Stellaris® I2C device is addressed as a Slave Transmitter. Write one data byte into the I2C Slave Data (I2CSDR) register to clear the TREQ bit. The write-only Control register consists of one bit: the DA bit. The DA bit enables and disables the Stellaris® I2C slave operation. Read-Only Status Register I2C Slave Control/Status (I2CSCSR) I2C Slave 0 base: 0x4002.0800 Offset 0x004 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved FBR TREQ RREQ Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 First Byte Received Indicates that the first byte following the slave’s own address is received. This bit is only valid when the RREQ bit is set, and is automatically cleared when data has been read from the I2CSDR register. Note: This bit is not used for slave transmit operations. 2 FBR RO 0 Transmit Request This bit specifies the state of the I2C slave with regards to outstanding transmit requests. If set, the I2C unit has been addressed as a slave transmitter and uses clock stretching to delay the master until data has been written to the I2CSDR register. Otherwise, there is no outstanding transmit request. 1 TREQ RO 0 Receive Request This bit specifies the status of the I2C slave with regards to outstanding receive requests. If set, the I2C unit has outstanding receive data from the I2C master and uses clock stretching to delay the master until the data has been read from the I2CSDR register. Otherwise, no receive data is outstanding. 0 RREQ RO 0 402 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Write-Only Control Register I2C Slave Control/Status (I2CSCSR) I2C Slave 0 base: 0x4002.0800 Offset 0x004 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Device Active Value Description 0 Disables the I2C slave operation. 1 Enables the I2C slave operation. 0 DA WO 0 November 30, 2007 403 Preliminary LM3S6952 Microcontroller Register 12: I2C Slave Data (I2CSDR), offset 0x008 This register contains the data to be transmitted when in the Slave Transmit state, and the data received when in the Slave Receive state. I2C Slave Data (I2CSDR) I2C Slave 0 base: 0x4002.0800 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DATA Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x00 Data for Transfer This field contains the data for transfer during a slave receive or transmit operation. 7:0 DATA R/W 0x0 404 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 13: I2C Slave Interrupt Mask (I2CSIMR), offset 0x00C This register controls whether a raw interrupt is promoted to a controller interrupt. I2C Slave Interrupt Mask (I2CSIMR) I2C Slave 0 base: 0x4002.0800 Offset 0x00C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IM Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Interrupt Mask This bit controls whether a raw interrupt is promoted to a controller interrupt. If set, the interrupt is not masked and the interrupt is promoted; otherwise, the interrupt is masked. 0 IM R/W 0 November 30, 2007 405 Preliminary LM3S6952 Microcontroller Register 14: I2C Slave Raw Interrupt Status (I2CSRIS), offset 0x010 This register specifies whether an interrupt is pending. I2C Slave Raw Interrupt Status (I2CSRIS) I2C Slave 0 base: 0x4002.0800 Offset 0x010 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Raw Interrupt Status This bit specifies the raw interrupt state (prior to masking) of the I2C slave block. If set, an interrupt is pending; otherwise, an interrupt is not pending. 0 RIS RO 0 406 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface Register 15: I2C Slave Masked Interrupt Status (I2CSMIS), offset 0x014 This register specifies whether an interrupt was signaled. I2C Slave Masked Interrupt Status (I2CSMIS) I2C Slave 0 base: 0x4002.0800 Offset 0x014 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MIS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Masked Interrupt Status This bit specifies the raw interrupt state (after masking) of the I2C slave block. If set, an interrupt was signaled; otherwise, an interrupt has not been generated since the bit was last cleared. 0 MIS RO 0 November 30, 2007 407 Preliminary LM3S6952 Microcontroller Register 16: I2C Slave Interrupt Clear (I2CSICR), offset 0x018 This register clears the raw interrupt. I2C Slave Interrupt Clear (I2CSICR) I2C Slave 0 base: 0x4002.0800 Offset 0x018 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Clear Interrupt This bit controls the clearing of the raw interrupt. A write of 1 clears the interrupt; otherwise a write of 0 has no affect on the interrupt state. A read of this register returns no meaningful data. 0 IC WO 0 408 November 30, 2007 Preliminary Inter-Integrated Circuit (I2C) Interface 16 Ethernet Controller The Stellaris® Ethernet Controller consists of a fully integrated media access controller (MAC) and network physical (PHY) interface device. The Ethernet Controller conforms to IEEE 802.3 specifications and fully supports 10BASE-T and 100BASE-TX standards. The Ethernet Controller module has the following features: ■ Conforms to the IEEE 802.3-2002 specification – 10BASE-T/100BASE-TX IEEE-802.3 compliant. Requires only a dual 1:1 isolation transformer interface to the line – 10BASE-T/100BASE-TX ENDEC, 100BASE-TX scrambler/descrambler – Full-featured auto-negotiation ■ Multiple operational modes – Full- and half-duplex 100 Mbps – Full- and half-duplex 10 Mbps – Power-saving and power-down modes ■ Highly configurable – Programmable MAC address – LED activity selection – Promiscuous mode support – CRC error-rejection control – User-configurable interrupts ■ Physical media manipulation – Automatic MDI/MDI-X cross-over correction – Register-programmable transmit amplitude – Automatic polarity correction and 10BASE-T signal reception November 30, 2007 409 Preliminary LM3S6952 Microcontroller 16.1 Block Diagram Figure 16-1. Ethernet Controller Block Diagram MACISR MACIACK MACIMR Interrupt Control MACRCR MACNPR Receive Control MACTCR MACITHR MACTRR Transmit Control Transmit FIFO Receive FIFO MACIAR0 MACIAR1 Individual Address MACMDTX MACMCR MACMDVR MACMAR MACMDRX MII Control MACDR Data Access TXOP TXON RXIP RXIN XTLP XTLN MDIX Clock Reference Transmit Encoding Pulse Shaping Receive Decoding Clock Recovery Auto Negotiation Carrier Sense MR3 MR0 MR1 MR2 MR4 Media Independent Interface Management Register Set MR5 MR18 MR6 MR16 MR17 MR19 MR23 MR24 Collision Detect System Clock Interrupt 16.2 Functional Description As shown in Figure 16-2 on page 410, the Ethernet Controller is functionally divided into two layers or modules: the Media Access Controller (MAC) layer and the Network Physical (PHY) layer. These correspond to the OSI model layers 2 and 1. The primary interface to the Ethernet Controller is a simple bus interface to the MAC layer. The MAC layer provides transmit and receive processing for Ethernet frames. The MAC layer also provides the interface to the PHY module via an internal Media Independent Interface (MII). Figure 16-2. Ethernet Controller Cortex M3 Media Access Controller MAC (Layer 2) Physical Layer Entity PHY (Layer 1) Magnetics RJ45 Ethernet Controller 16.2.1 Internal MII Operation For the MII management interface to function properly, the MDIO signal must be connected through a 10k Ω pull-up resistor to the +3.3 V supply. Failure to connect this pull-up resistor will prevent management transactions on this internal MII to function. Note that it is possible for data transmission across the MII to still function since the PHY layer will auto-negotiate the link parameters by default. 410 November 30, 2007 Preliminary Ethernet Controller For the MII management interface to function properly, the internal clock must be divided down from the system clock to a frequency no greater than 2.5 MHz. The MACMDV register contains the divider used for scaling down the system clock. See page 430 for more details about the use of this register. 16.2.2 PHY Configuration/Operation The Physical Layer (PHY) in the Ethernet Controller includes integrated ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured auto-negotiation functions. The transmitter includes an on-chip pulse shaper and a low-power line driver. The receiver has an adaptive equalizer and a baseline restoration circuit required for accurate clock and data recovery. The transceiver interfaces to Category-5 unshielded twisted pair (Cat-5 UTP) cabling for 100BASE-TX applications, and Category-3 unshielded twisted pair (Cat-3 UTP) for 10BASE-T applications. The Ethernet Controller is connected to the line media via dual 1:1 isolation transformers. No external filter is required. 16.2.2.1 Clock Selection The PHY has an on-chip crystal oscillator which can also be driven by an external oscillator. In this mode of operation, a 25-MHz crystal should be connected between the XTALPPHY and XTALNPHY pins. Alternatively, an external 25-MHz clock input can be connected to the XTALPPHY pin. In this mode of operation, a crystal is not required and the XTALNPHY pin must be tied to ground. 16.2.2.2 Auto-Negotiation The PHY supports the auto-negotiation functions of Clause 28 of the IEEE 802.3 standard for 10/100 Mbps operation over copper wiring. This function can be enabled via register settings. The auto-negotiation function defaults to On and the ANEGEN bit in the MR0 register is High after reset. Software can disable the auto-negotiation function by writing to the ANEGEN bit. The contents of the MR4 register are sent to the PHY’s link partner during auto-negotiation via fast-link pulse coding. Once auto-negotiation is complete, the DPLX and RATE bits in the MR18 register reflect the actual speed and duplex that was chosen. If auto-negotiation fails to establish a link for any reason, the ANEGF bit in the MR18 register reflects this and auto-negotiation restarts from the beginning. Writing a 1 to the RANEG bit in the MR0 register also causes auto-negotiation to restart. 16.2.2.3 Polarity Correction The PHY is capable of either automatic or manual polarity reversal for 10BASE-T and auto-negotiation functions. Bits 4 and 5 (RVSPOL and APOL) in the MR16 register control this feature. The default is automatic mode, where APOL is Low and RVSPOL indicates if the detection circuitry has inverted the input signal. To enter manual mode, APOL should be set High and RVSPOL then controls the signal polarity. 16.2.2.4 MDI/MDI-X Configuration The PHY supports the automatic MDI/MDI-X configuration as defined in IEEE 802.3-2002 specification. This eliminates the need for cross-over cables when connecting to another device, such as a hub. The algorithm is controlled via settings in the MR24 register. Refer to page 452 for additional details about these settings. 16.2.2.5 LED Indicators The PHY supports two LED signals that can be used to indicate various states of operation of the Ethernet Controller. These signals are mapped to the LED0 and LED1 pins. By default, these pins are configured as GPIO signals (PF3 and PF2). For the PHY layer to drive these signals, they must be reconfigured to their hardware function. See “General-Purpose Input/Outputs (GPIOs)” on page November 30, 2007 411 Preliminary LM3S6952 Microcontroller 163 for additional details. The function of these pins is programmable via the PHY layer MR23 register. Refer to page 451 for additonal details on how to program these LED functions. 16.2.3 MAC Configuration/Operation 16.2.3.1 Ethernet Frame Format Ethernet data is carried by Ethernet frames. The basic frame format is shown in Figure 16-3 on page 412. Figure 16-3. Ethernet Frame Preamble SFD Destination Address Source Address Length/ Type Data FCS 7 Bytes 6 Bytes 6 Bytes 2 Bytes 1 Byte 4 Bytes 46 - 1500 Bytes The seven fields of the frame are transmitted from left to right. The bits within the frame are transmitted from least to most significant bit. ■ Preamble The Preamble field is used by the physical layer signaling circuitry to synchronize with the received frame’s timing. The preamble is 7 octets long. ■ Start Frame Delimiter (SFD) The SFD field follows the preamble pattern and indicates the start of the frame. Its value is 1010.1011. ■ Destination Address (DA) This field specifies destination addresses for which the frame is intended. The LSB of the DA determines whether the address is an individual (0), or group/multicast (1) address. ■ Source Address (SA) The source address field identifies the station from which the frame was initiated. ■ Length/Type Field The meaning of this field depends on its numeric value. The first of two octets is most significant. This field can be interpreted as length or type code. The maximum length of the data field is 1500 octets. If the value of the Length/Type field is less than or equal to 1500 decimal, it indicates the number of MAC client data octets. If the value of this field is greater than or equal to 1536 decimal, then it is type interpretation. The meaning of the Length/Type field when the value is between 1500 and 1536 decimal is unspecified by the standard. The MAC module assumes type interpretation if the value of the Length/Type field is greater than 1500 decimal. ■ Data The data field is a sequence of 0 to 1500 octets. Full data transparency is provided so any values can appear in this field. A minimum frame size is required to properly meet the IEEE standard. If necessary, the data field is extended by appending extra bits (a pad). The pad field can have a size of 0 to 46 octets. The sum of the data and pad lengths must be a minimum of 46 octets. The MAC module automatically inserts pads if required, though it can be disabled by a register 412 November 30, 2007 Preliminary Ethernet Controller write. For the MAC module core, data sent/received can be larger than 1500 bytes, and no Frame Too Long error is reported. Instead, a FIFO Overrun error is reported when the frame received is too large to fit into the Ethernet Controller’s RAM. ■ Frame Check Sequence (FCS) The frame check sequence carries the cyclic redundancy check (CRC) value. The value of this field is computed over destination address, source address, length/type, data, and pad fields using the CRC-32 algorithm. The MAC module computes the FCS value one nibble at a time. For transmitted frames, this field is automatically inserted by the MAC layer, unless disabled by the CRC bit in the MACTCTL register. For received frames, this field is automatically checked. If the FCS does not pass, the frame will not be placed in the RX FIFO, unless the FCS check is disabled by the BADCRC bit in the MACRCTL register. 16.2.3.2 MAC Layer FIFOs For Ethernet frame transmission, a 2 KB TX FIFO is provided that can be used to store a single frame. While the IEEE 802.3 specification limits the size of an Ethernet frame's payload section to 1500 Bytes, the Ethernet Controller places no such limit. The full buffer can be used, for a payload of up to 2032 bytes. For Ethernet frame reception, a 2-KB RX FIFO is provided that can be used to store multiple frames, up to a maximum of 31 frames. If a frame is received and there is insufficient space in the RX FIFO, an overflow error will be indicated. For details regarding the TX and RX FIFO layout, refer to Table 16-1 on page 413. Please note the following difference between TX and RX FIFO layout. For the TX FIFO, the Data Length field in the first FIFO word refers to the Ethernet frame data payload, as shown in the 5th to nth FIFO positions. For the RX FIFO, the Frame Length field is the total length of the received Ethernet frame, including the FCS and Frame Length bytes. Also note that if FCS generation is disabled with the CRC bit in the MACTCTL register, the last word in the FIFO must be the FCS bytes for the frame that has been written to the FIFO. Also note that if the length of the data payload section is not a multiple of 4, the FCS field will overlap words in the FIFO. However, for the RX FIFO, the beginning of the next frame will always be on a word boundary. Table 16-1. TX & RX FIFO Organization FIFO Word Read/Write Word Bit Fields TX FIFO (Write) RX FIFO (Read) Sequence 1st 7:0 Data Length LSB Frame Length LSB 15:8 Data Length MSB Frame Length MSB 23:16 DA oct 1 31:24 DA oct 2 2nd 7:0 DA oct 3 15:8 DA oct 4 23:16 DA oct 5 31:24 DA oct 6 3rd 7:0 SA oct 1 15:8 SA oct 2 23:16 SA oct 3 31:24 SA oct 4 November 30, 2007 413 Preliminary LM3S6952 Microcontroller FIFO Word Read/Write Word Bit Fields TX FIFO (Write) RX FIFO (Read) Sequence 4th 7:0 SA oct 5 15:8 SA oct 6 23:16 Len/Type MSB 31:24 Len/Type LSB 5th to nth 7:0 data oct n 15:8 data oct n+1 23:16 data oct n+2 31:24 data oct n+3 FCS 1 (if the CRC bit in FCS 1 MACCTL is 0) last 7:0 FCS 2 (if the CRC bit in FCS 2 MACCTL is 0) 15:8 FCS 3 (if the CRC bit in FCS 3 MACCTL is 0) 23:16 FCS 4 (if the CRC bit in FCS 4 MACCTL is 0) 31:24 16.2.3.3 Ethernet Transmission Options The Ethernet Controller can automatically generate and insert the Frame Check Sequence (FCS) at the end of the transmit frame. This is controlled by the CRC bit in the MACTCTL register. For test purposes, in order to generate a frame with an invalid CRC, this feature can be disabled. The IEEE 802.3 specification requires that the Ethernet frame payload section be a minimum of 46 bytes. The Ethernet Controller can be configured to automatically pad the data section if the payload data section loaded into the FIFO is less than the minimum 46 bytes. This feature is controlled by the PADEN bit in the MACTCTL register. At the MAC layer, the transmitter can be configured for both full-duplex and half-duplex operation by using the DUPLEX bit in the MACTCTL register. 16.2.3.4 Ethernet Reception Options Using the BADCRC bit in the MACRCTL register, the Ethernet Controller can be configured to reject incoming Ethernet frames with an invalid FCS field. The Ethernet receiver can also be configured for Promiscuous and Multicast modes using the PRMS and AMUL fields in the MACRCTL register. If these modes are not enabled, only Ethernet frames with a broadcast address, or frames matching the MAC address programmed into the MACIA0 and MACIA1 register will be placed into the RX FIFO. 16.2.4 Interrupts The Ethernet Controller can generate an interrupt for one or more of the following conditions: ■ A frame has been received into an empty RX FIFO ■ A frame transmission error has occurred ■ A frame has been transmitted successfully ■ A frame has been received with no room in the RX FIFO (overrun) 414 November 30, 2007 Preliminary Ethernet Controller ■ A frame has been received with one or more error conditions (for example, FCS failed) ■ An MII management transaction between the MAC and PHY layers has completed ■ One or more of the following PHY layer conditions occurs: – Auto-Negotiate Complete – Remote Fault – Link Status Change – Link Partner Acknowledge – Parallel Detect Fault – Page Received – Receive Error – Jabber Event Detected 16.3 Initialization and Configuration To use the Ethernet Controller, the peripheral must be enabled by setting the EPHY0 and EMAC0 bits in the RCGC2 register. The following steps can then be used to configure the Ethernet Controller for basic operation. 1. Program the MACDIV register to obtain a 2.5 MHz clock (or less) on the internal MII. Assuming a 20-MHz system clock, the MACDIV value would be 4. 2. Program the MACIA0 and MACIA1 register for address filtering. 3. Program the MACTCTL register for Auto CRC generation, padding, and full-duplex operation using a value of 0x16. 4. Program the MACRCTL register to reject frames with bad FCS using a value of 0x08. 5. Enable both the Transmitter and Receive by setting the LSB in both the MACTCTL and MACRCTL registers. 6. To transmit a frame, write the frame into the TX FIFO using the MACDATA register. Then set the NEWTX bit in the MACTR register to initiate the transmit process. When the NEWTX bit has been cleared, the TX FIFO will be available for the next transmit frame. 7. To receive a frame, wait for the NPR field in the MACNP register to be non-zero. Then begin reading the frame from the RX FIFO by using the MACDATA register. When the frame (including the FCS field) has been read, the NPR field should decrement by one. When there are no more frames in the RX FIFO, the NPR field will read 0. 16.4 Ethernet Register Map Table 16-2 on page 416 lists the Ethernet MAC registers. All addresses given are relative to the Ethernet MAC base address of 0x4004.8000. November 30, 2007 415 Preliminary LM3S6952 Microcontroller The IEEE 802.3 standard specifies a register set for controlling and gathering status from the PHY. The registers are collectively known as the MII Management registers and are detailed in Section 22.2.4 of the IEEE 802.3 specification. Table 16-2 on page 416 also lists these MII Management registers. All addresses given are absolute and are written directly to the REGADR field of the MACMCTL register. The format of registers 0 to 15 are defined by the IEEE specification and are common to all PHY implementations. The only variance allowed is for features that may or may not be supported by a specific PHY. Registers 16 to 31 are vendor-specific registers, used to support features that are specific to a vendors PHY implementation. Vendor-specific registers not listed are reserved. Table 16-2. Ethernet Register Map See Offset Name Type Reset Description page Ethernet MAC 0x000 MACRIS RO 0x0000.0000 Ethernet MAC Raw Interrupt Status 418 0x000 MACIACK W1C 0x0000.0000 Ethernet MAC Interrupt Acknowledge 420 0x004 MACIM R/W 0x0000.007F Ethernet MAC Interrupt Mask 421 0x008 MACRCTL R/W 0x0000.0008 Ethernet MAC Receive Control 422 0x00C MACTCTL R/W 0x0000.0000 Ethernet MAC Transmit Control 423 0x010 MACDATA R/W 0x0000.0000 Ethernet MAC Data 424 0x014 MACIA0 R/W 0x0000.0000 Ethernet MAC Individual Address 0 426 0x018 MACIA1 R/W 0x0000.0000 Ethernet MAC Individual Address 1 427 0x01C MACTHR R/W 0x0000.003F Ethernet MAC Threshold 428 0x020 MACMCTL R/W 0x0000.0000 Ethernet MAC Management Control 429 0x024 MACMDV R/W 0x0000.0080 Ethernet MAC Management Divider 430 0x02C MACMTXD R/W 0x0000.0000 Ethernet MAC Management Transmit Data 431 0x030 MACMRXD R/W 0x0000.0000 Ethernet MAC Management Receive Data 432 0x034 MACNP RO 0x0000.0000 Ethernet MAC Number of Packets 433 0x038 MACTR R/W 0x0000.0000 Ethernet MAC Transmission Request 434 MII Management - MR0 R/W 0x3100 Ethernet PHY Management Register 0 – Control 435 - MR1 RO 0x7849 Ethernet PHY Management Register 1 – Status 437 Ethernet PHY Management Register 2 – PHY Identifier 439 - MR2 RO 0x000E 1 Ethernet PHY Management Register 3 – PHY Identifier 440 - MR3 RO 0x7237 2 Ethernet PHYManagement Register 4 – Auto-Negotiation 441 - MR4 R/W 0x01E1 Advertisement Ethernet PHYManagement Register 5 – Auto-Negotiation 443 - MR5 RO 0x0000 Link Partner Base Page Ability 416 November 30, 2007 Preliminary Ethernet Controller See Offset Name Type Reset Description page Ethernet PHYManagement Register 6 – Auto-Negotiation 444 - MR6 RO 0x0000 Expansion Ethernet PHY Management Register 16 – 445 - MR16 R/W 0x0140 Vendor-Specific Ethernet PHY Management Register 17 – Interrupt 447 - MR17 R/W 0x0000 Control/Status - MR18 RO 0x0000 Ethernet PHY Management Register 18 – Diagnostic 449 Ethernet PHY Management Register 19 – Transceiver 450 - MR19 R/W 0x4000 Control Ethernet PHY Management Register 23 – LED 451 - MR23 R/W 0x0010 Configuration Ethernet PHY Management Register 24 –MDI/MDIX 452 - MR24 R/W 0x00C0 Control 16.5 Ethernet MAC Register Descriptions The remainder of this section lists and describes the Ethernet MAC registers, in numerical order by address offset. Also see “MII Management Register Descriptions” on page 434. November 30, 2007 417 Preliminary LM3S6952 Microcontroller Register 1: Ethernet MAC Raw Interrupt Status (MACRIS), offset 0x000 The MACRIS register is the interrupt status register. On a read, this register gives the current status value of the corresponding interrupt prior to masking. Ethernet MAC Raw Interrupt Status (MACRIS) Base 0x4004.8000 Offset 0x000 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PHYINT MDINT RXER FOV TXEMP TXER RXINT Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0x0 PHY Interrupt When set, indicates that an enabled interrupt in the PHY layer has occured. MR17 in the PHY must be read to determine the specific PHY event that triggered this interrupt. 6 PHYINT RO 0x0 MII Transaction Complete When set, indicates that a transaction (read or write) on the MII interface has completed successfully. 5 MDINT RO 0x0 Receive Error This bit indicates that an error was encountered on the receiver. The possible errors that can cause this interrupt bit to be set are: ■ A receive error occurs during the reception of a frame (100 Mb/s only). ■ The frame is not an integer number of bytes (dribble bits) due to an alignment error. ■ The CRC of the frame does not pass the FCS check. ■ The length/type field is inconsistent with the frame data size when interpreted as a length field. 4 RXER RO 0x0 FIFO Overrrun When set, indicates that an overrun was encountered on the receive FIFO. 3 FOV RO 0x0 Transmit FIFO Empty When set, indicates that the packet was transmitted and that the TX FIFO is empty. 2 TXEMP RO 0x0 418 November 30, 2007 Preliminary Ethernet Controller Bit/Field Name Type Reset Description Transmit Error When set, indicates that an error was encountered on the transmitter. The possible errors that can cause this interrupt bit to be set are: ■ The data length field stored in the TX FIFO exceeds 2032. The frame is not sent when this error occurs. ■ The retransmission attempts during the backoff process have exceeded the maximum limit of 16. 1 TXER RO 0x0 Packet Received When set, indicates that at least one packet has been received and is stored in the receiver FIFO. 0 RXINT RO 0x0 November 30, 2007 419 Preliminary LM3S6952 Microcontroller Register 2: Ethernet MAC Interrupt Acknowledge (MACIACK), offset 0x000 A write of a 1 to any bit position of this register clears the corresponding interrupt bit in the Ethernet MAC Raw Interrupt Status (MACRIS) register. Ethernet MAC Interrupt Acknowledge (MACIACK) Base 0x4004.8000 Offset 0x000 Type W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PHYINT MDINT RXER FOV TXEMP TXER RXINT Type RO RO RO RO RO RO RO RO RO W1C W1C W1C W1C W1C W1C W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0x0 Clear PHY Interrupt A write of a 1 clears the PHYINT interrupt read from the MACRIS register. 6 PHYINT W1C 0x0 Clear MII Transaction Complete A write of a 1 clears the MDINT interrupt read from the MACRIS register. 5 MDINT W1C 0x0 Clear Receive Error A write of a 1 clears the RXER interrupt read from the MACRIS register. 4 RXER W1C 0x0 Clear FIFO Overrun A write of a 1 clears the FOV interrupt read from the MACRIS register. 3 FOV W1C 0x0 Clear Transmit FIFO Empty A write of a 1 clears the TXEMP interrupt read from the MACRIS register. 2 TXEMP W1C 0x0 Clear Transmit Error A write of a 1 clears the TXER interrupt read from the MACRIS register and resets the TX FIFO write pointer. 1 TXER W1C 0x0 Clear Packet Received A write of a 1 clears the RXINT interrupt read from the MACRIS register. 0 RXINT W1C 0x0 420 November 30, 2007 Preliminary Ethernet Controller Register 3: Ethernet MAC Interrupt Mask (MACIM), offset 0x004 This register allows software to enable/disable Ethernet MAC interrupts. Writing a 0 disables the interrupt, while writing a 1 enables it. Ethernet MAC Interrupt Mask (MACIM) Base 0x4004.8000 Offset 0x004 Type R/W, reset 0x0000.007F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PHYINTM MDINTM RXERM FOVM TXEMPM TXERM RXINTM Type RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0x0 Mask PHY Interrupt This bit masks the PHYINT bit in the MACRIS register from being asserted. 6 PHYINTM R/W 1 Mask MII Transaction Complete This bit masks the MDINT bit in the MACRIS register from being asserted. 5 MDINTM R/W 1 Mask Receive Error This bit masks the RXER bit in the MACRIS register from being asserted. 4 RXERM R/W 1 Mask FIFO Overrrun This bit masks the FOV bit in the MACRIS register from being asserted. 3 FOVM R/W 1 Mask Transmit FIFO Empty This bit masks the TXEMP bit in the MACRIS register from being asserted. 2 TXEMPM R/W 1 Mask Transmit Error This bit masks the TXER bit in the MACRIS register from being asserted. 1 TXERM R/W 1 Mask Packet Received This bit masks the RXINT bit in the MACRIS register from being asserted. 0 RXINTM R/W 1 November 30, 2007 421 Preliminary LM3S6952 Microcontroller Register 4: Ethernet MAC Receive Control (MACRCTL), offset 0x008 This register enables software to configure the receive module and control the types of frames that are received from the physical medium. It is important to note that when the receive module is enabled, all valid frames with a broadcast address of FF-FF-FF-FF-FF-FF in the Destination Address field will be received and stored in the RX FIFO, even if the AMUL bit is not set. Ethernet MAC Receive Control (MACRCTL) Base 0x4004.8000 Offset 0x008 Type R/W, reset 0x0000.0008 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RSTFIFO BADCRC PRMS AMUL RXEN Type RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:5 reserved RO 0x0 Clear Receive FIFO When set, clears the receive FIFO. This should be done when software initialization is performed. It is recommended that the receiver be disabled (RXEN = 0), and then the reset initiated (RSTFIFO = 1). This sequence will flush and reset the RX FIFO. 4 RSTFIFO R/W 0x0 Enable Reject Bad CRC The BADCRC bit enables the rejection of frames with an incorrectly calculated CRC. 3 BADCRC R/W 0x1 Enable Promiscuous Mode The PRMS bit enables Promiscuous mode, which accepts all valid frames, regardless of the Destination Address. 2 PRMS R/W 0x0 Enable Multicast Frames The AMUL bit enables the reception of multicast frames from the physical medium. 1 AMUL R/W 0x0 Enable Receiver The RXEN bit enables the Ethernet receiver. When this bit is Low, the receiver is disabled and all frames on the physical medium are ignored. 0 RXEN R/W 0x0 422 November 30, 2007 Preliminary Ethernet Controller Register 5: Ethernet MAC Transmit Control (MACTCTL), offset 0x00C This register enables software to configure the transmit module, and control frames are placed onto the physical medium. Ethernet MAC Transmit Control (MACTCTL) Base 0x4004.8000 Offset 0x00C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DUPLEX reserved CRC PADEN TXEN Type RO RO RO RO RO RO RO RO RO RO RO R/W RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:5 reserved RO 0x0 Enable Duplex Mode When set, enables Duplex mode, allowing simultaneous transmission and reception. 4 DUPLEX R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3 reserved RO 0x0 Enable CRC Generation When set, enables the automatic generation of the CRC and the placement at the end of the packet. If this bit is not set, the frames placed in the TX FIFO will be sent exactly as they are written into the FIFO. 2 CRC R/W 0x0 Enable Packet Padding When set, enables the automatic padding of packets that do not meet the minimum frame size. 1 PADEN R/W 0x0 Enable Transmitter When set, enables the transmitter. When this bit is 0, the transmitter is disabled. 0 TXEN R/W 0x0 November 30, 2007 423 Preliminary LM3S6952 Microcontroller Register 6: Ethernet MAC Data (MACDATA), offset 0x010 This register enables software to access the TX and RX FIFOs. Reads from this register return the data stored in the RX FIFO from the location indicated by the read pointer. Writes to this register store the data in the TX FIFO at the location indicated by the write pointer. The write pointer is then auto-incremented to the next TX FIFO location. There is no mechanism for randomly accessing bytes in either the RX or TX FIFOs. Data must be read from the RX FIFO sequentially and stored in a buffer for further processing. Once a read has been performed, the data in the FIFO cannot be re-read. Data must be written to the TX FIFO sequentially. If an error is made in placing the frame into the TX FIFO, the write pointer can be reset to the start of the TX FIFO by writing the TXER bit of the MACIACK register and then the data re-written. Read-Only Register Ethernet MAC Data (MACDATA) Base 0x4004.8000 Offset 0x010 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 RXDATA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RXDATA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Receive FIFO Data The RXDATA bits represent the next four bytes of data stored in the RX FIFO. 31:0 RXDATA RO 0x0 Write-Only Register Ethernet MAC Data (MACDATA) Base 0x4004.8000 Offset 0x010 Type WO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 TXDATA Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TXDATA Type WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO WO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 424 November 30, 2007 Preliminary Ethernet Controller Bit/Field Name Type Reset Description Transmit FIFO Data The TXDATA bits represent the next four bytes of data to place in the TX FIFO for transmission. 31:0 TXDATA WO 0x0 November 30, 2007 425 Preliminary LM3S6952 Microcontroller Register 7: Ethernet MAC Individual Address 0 (MACIA0), offset 0x014 This register enables software to program the first four bytes of the hardware MAC address of the Network Interface Card (NIC). (The last two bytes are in MACIA1). The 6-byte IAR is compared against the incoming Destination Address fields to determine whether the frame should be received. Ethernet MAC Individual Address 0 (MACIA0) Base 0x4004.8000 Offset 0x014 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 MACOCT4 MACOCT3 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MACOCT2 MACOCT1 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description MAC Address Octet 4 The MACOCT4 bits represent the fourth octet of the MAC address used to uniquely identify each Ethernet Controller. 31:24 MACOCT4 R/W 0x0 MAC Address Octet 3 The MACOCT3 bits represent the third octet of the MAC address used to uniquely identify each Ethernet Controller. 23:16 MACOCT3 R/W 0x0 MAC Address Octet 2 The MACOCT2 bits represent the second octet of the MAC address used to uniquely identify each Ethernet Controller. 15:8 MACOCT2 R/W 0x0 MAC Address Octet 1 The MACOCT1 bits represent the first octet of the MAC address used to uniquely identify each Ethernet Controller. 7:0 MACOCT1 R/W 0x0 426 November 30, 2007 Preliminary Ethernet Controller Register 8: Ethernet MAC Individual Address 1 (MACIA1), offset 0x018 This register enables software to program the last two bytes of the hardware MAC address of the Network Interface Card (NIC). (The first four bytes are in MACIA0). The 6-byte IAR is compared against the incoming Destination Address fields to determine whether the frame should be received. Ethernet MAC Individual Address 1 (MACIA1) Base 0x4004.8000 Offset 0x018 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MACOCT6 MACOCT5 Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0 MAC Address Octet 6 The MACOCT6 bits represent the sixth octet of the MAC address used to uniquely identify each Ethernet Controller. 15:8 MACOCT6 R/W 0x0 MAC Address Octet 5 The MACOCT5 bits represent the fifth octet of the MAC address used to uniquely identify each Ethernet Controller. 7:0 MACOCT5 R/W 0x0 November 30, 2007 427 Preliminary LM3S6952 Microcontroller Register 9: Ethernet MAC Threshold (MACTHR), offset 0x01C This register enables software to set the threshold level at which the transmission of the frame begins. If the THRESH bits are set to 0x3F, which is the reset value, transmission does not start until the NEWTX bit is set in the MACTR register. This effectively disables the early transmission feature. Writing the THRESH bits to any value besides all 1s enables the early transmission feature. Once the byte count of data in the TX FIFO reaches this level, transmission of the frame begins. When THRESH is set to all 0s, transmission of the frame begins after 4 bytes (a single write) are stored in the TX FIFO. Each increment of the THRESH bit field waits for an additional 32 bytes of data (eight writes) to be stored in the TX FIFO. Therefore, a value of 0x01 would wait for 36 bytes of data to be written while a value of 0x02 would wait for 68 bytes to be written. In general, early transmission starts when: Number of Bytes >= 4 (THRESH x 8 + 1) Reaching the threshold level has the same effect as setting the NEWTX bit in the MACTR register. Transmission of the frame begins and then the number of bytes indicated by the Data Length field is sent out on the physical medium. Because under-run checking is not performed, it is possible that the tail pointer may reach and pass the write pointer in the TX FIFO. This causes indeterminate values to be written to the physical medium rather than the end of the frame. Therefore, sufficient bus bandwidth for writing to the TX FIFO must be guaranteed by the software. If a frame smaller than the threshold level needs to be sent, the NEWTX bit in the MACTR register must be set with an explicit write. This initiates the transmission of the frame even though the threshold limit has not been reached. If the threshold level is set too small, it is possible for the transmitter to underrun. If this occurs, the transmit frame is aborted, and a transmit error occurs. Ethernet MAC Threshold (MACTHR) Base 0x4004.8000 Offset 0x01C Type R/W, reset 0x0000.003F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved THRESH Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x0 Threshold Value The THRESH bits represent the early transmit threshold. Once the amount of data in the TX FIFO exceeds this value, transmission of the packet begins. 5:0 THRESH R/W 0x3F 428 November 30, 2007 Preliminary Ethernet Controller Register 10: Ethernet MAC Management Control (MACMCTL), offset 0x020 This register enables software to control the transfer of data to and from the MII Management registers in the Ethernet PHY. The address, name, type, reset configuration, and functional description of each of these registers can be found in Table 16-2 on page 416 and in “MII Management Register Descriptions” on page 434. In order to initiate a read transaction from the MII Management registers, the WRITE bit must be written with a 0 during the same cycle that the START bit is written with a 1. In order to initiate a write transaction to the MII Management registers, the WRITE bit must be written with a 1 during the same cycle that the START bit is written with a 1. Ethernet MAC Management Control (MACMCTL) Base 0x4004.8000 Offset 0x020 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved REGADR reserved WRITE START Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x0 MII Register Address The REGADR bit field represents the MII Management register address for the next MII management interface transaction. 7:3 REGADR R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2 reserved RO 0x0 MII Register Transaction Type The WRITE bit represents the operation of the next MII management interface transaction. If WRITE is set, the next operation will be a write; otherwise, it will be a read. 1 WRITE R/W 0x0 MII Register Transaction Enable The START bit represents the initiation of the next MII management interface transaction. When a 1 is written to this bit, the MII register located at REGADR will be read (WRITE=0) or written (WRITE=1). 0 START R/W 0x0 November 30, 2007 429 Preliminary LM3S6952 Microcontroller Register 11: Ethernet MAC Management Divider (MACMDV), offset 0x024 This register enables software to set the clock divider for the Management Data Clock (MDC). This clock is used to synchronize read and write transactions between the system and the MII Management registers. The frequency of the MDC clock can be calculated from the following formula: Fmdc = Fipclk / (2 * (MACMDVR + 1 )) The clock divider must be written with a value that ensures that the MDC clock will not exceed a frequency of 2.5 MHz. Ethernet MAC Management Divider (MACMDV) Base 0x4004.8000 Offset 0x024 Type R/W, reset 0x0000.0080 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DIV Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:8 reserved RO 0x0 Clock Divider The DIV bits are used to set the clock divider for the MDC clock used to transmit data between the MAC and PHY over the serial MII interface. 7:0 DIV R/W 0x80 430 November 30, 2007 Preliminary Ethernet Controller Register 12: Ethernet MAC Management Transmit Data (MACMTXD), offset 0x02C This register holds the next value to be written to the MII Management registers. Ethernet MAC Management Transmit Data (MACMTXD) Base 0x4004.8000 Offset 0x02C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MDTX Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0 MII Register Transmit Data The MDTX bits represent the data that will be written in the next MII management transaction. 15:0 MDTX R/W 0x0 November 30, 2007 431 Preliminary LM3S6952 Microcontroller Register 13: Ethernet MAC Management Receive Data (MACMRXD), offset 0x030 This register holds the last value read from the MII Management registers. Ethernet MAC Management Receive Data (MACMRXD) Base 0x4004.8000 Offset 0x030 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MDRX Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x0 MII Register Receive Data The MDRX bits represent the data that was read in the previous MII management transaction. 15:0 MDRX R/W 0x0 432 November 30, 2007 Preliminary Ethernet Controller Register 14: Ethernet MAC Number of Packets (MACNP), offset 0x034 This register holds the number of frames that are currently in the RX FIFO. When NPR is 0, there are no frames in the RX FIFO and the RXINT bit is not set. When NPR is any other value, there is at least one frame in the RX FIFO and the RXINT bit in the MACRIS register is set. Ethernet MAC Number of Packets (MACNP) Base 0x4004.8000 Offset 0x034 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved NPR Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x0 Number of Packets in Receive FIFO The NPR bits represent the number of packets stored in the RX FIFO. While the NPR field is greater than 0, the RXINT interrupt in the MACRIS register will be asserted. 5:0 NPR RO 0x0 November 30, 2007 433 Preliminary LM3S6952 Microcontroller Register 15: Ethernet MAC Transmission Request (MACTR), offset 0x038 This register enables software to initiate the transmission of the frame currently located in the TX FIFO to the physical medium. Once the frame has been transmitted to the medium from the TX FIFO or a transmission error has been encountered, the NEWTX bit is auto-cleared by the hardware. Ethernet MAC Transmission Request (MACTR) Base 0x4004.8000 Offset 0x038 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved NEWTX Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x0 New Transmission When set, the NEWTX bit initiates an Ethernet transmission once the packet has been placed in the TX FIFO. This bit is cleared once the transmission has been completed. If early transmission is being used (see the MACTHR register), this bit does not need to be set. 0 NEWTX R/W 0x0 16.6 MII Management Register Descriptions The IEEE 802.3 standard specifies a register set for controlling and gathering status from the PHY. The registers are collectively known as the MII Management registers. All addresses given are absolute. Addresses not listed are reserved. Also see “Ethernet MAC Register Descriptions” on page 417. 434 November 30, 2007 Preliminary Ethernet Controller Register 16: Ethernet PHY Management Register 0 – Control (MR0), address 0x00 This register enables software to configure the operation of the PHY. The default settings of these registers are designed to initialize the PHY to a normal operational mode without configuration. Ethernet PHY Management Register 0 – Control (MR0) Base 0x4004.8000 Address 0x00 Type R/W, reset 0x3100 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RESET LOOPBK SPEEDSL ANEGEN PWRDN ISO RANEG DUPLEX COLT reserved Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Reset Registers When set, resets the registers to their default state and reinitializes internal state machines. Once the reset operation has completed, this bit is cleared by hardware. 15 RESET R/W 0 Loopback Mode When set, enables the Loopback mode of operation. The receive circuitry is isolated from the physical medium and transmissions are sent back through the receive circuitry instead of the medium. 14 LOOPBK R/W 0 Speed Select 1: Enables the 100 Mb/s mode of operation (100BASE-TX). 0: Enables the 10 Mb/s mode of operation (10BASE-T). 13 SPEEDSL R/W 1 Auto-Negotiation Enable When set, enables the Auto-Negotiation process. 12 ANEGEN R/W 1 Power Down When set, places the PHY into a low-power consuming state. 11 PWRDN R/W 0 Isolate When set, isolates transmit and receive data paths and ignores all signaling on these buses. 10 ISO R/W 0 Restart Auto-Negotiation When set, restarts the Auto-Negotiation process. Once the restart has initiated, this bit is cleared by hardware. 9 RANEG R/W 0 Set Duplex Mode 1: Enables the Full-Duplex mode of operation. This bit can be set by software in a manual configuration process or by the Auto-Negotiation process. 0: Enables the Half-Duplex mode of operation. 8 DUPLEX R/W 1 November 30, 2007 435 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Collision Test When set, enables the Collision Test mode of operation. The COLT bit asserts after the initiation of a transmission and de-asserts once the transmission is halted. 7 COLT R/W 0 6:0 reserved R/W 0x00 Write as 0, ignore on read. 436 November 30, 2007 Preliminary Ethernet Controller Register 17: Ethernet PHY Management Register 1 – Status (MR1), address 0x01 This register enables software to determine the capabilities of the PHY and perform its initialization and operation appropriately. Ethernet PHY Management Register 1 – Status (MR1) Base 0x4004.8000 Address 0x01 Type RO, reset 0x7849 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved 100X_F 100X_H 10T_F 10T_H reserved MFPS ANEGC RFAULT ANEGA LINK JAB EXTD Type RO RO RO RO RO RO RO RO RO RO RO RC RO RO RC RO Reset 0 1 1 1 1 0 0 0 0 1 0 0 1 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15 reserved RO 0 100BASE-TX Full-Duplex Mode When set, indicates that the PHY is capable of supporting 100BASE-TX Full-Duplex mode. 14 100X_F RO 1 100BASE-TX Half-Duplex Mode When set, indicates that the PHY is capable of supporting 100BASE-TX Half-Duplex mode. 13 100X_H RO 1 10BASE-T Full-Duplex Mode When set, indicates that the PHY is capable of 10BASE-T Full-Duplex mode. 12 10T_F RO 1 10BASE-T Half-Duplex Mode When set, indicates that the PHY is capable of supporting 10BASE-T Half-Duplex mode. 11 10T_H RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 10:7 reserved RO 0 Management Frames with Preamble Suppressed When set, indicates that the Management Interface is capable of receiving management frames with the preamble suppressed. 6 MFPS RO 1 Auto-Negotiation Complete When set, indicates that the Auto-Negotiation process has been completed and that the extended registers defined by the Auto-Negotiation protocol are valid. 5 ANEGC RO 0 Remote Fault When set, indicates that a remote fault condition has been detected. This bit remains set until it is read, even if the condition no longer exists. 4 RFAULT RC 0 November 30, 2007 437 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Auto-Negotiation When set, indicates that the PHY has the ability to perform Auto-Negotiation. 3 ANEGA RO 1 Link Made When set, indicates that a valid link has been established by the PHY. 2 LINK RO 0 Jabber Condition When set, indicates that a jabber condition has been detected by the PHY. This bit remains set until it is read, even if the jabber condition no longer exists. 1 JAB RC 0 Extended Capabilities When set, indicates that the PHY provides an extended set of capabilities that can be accessed through the extended register set. 0 EXTD RO 1 438 November 30, 2007 Preliminary Ethernet Controller Register 18: Ethernet PHY Management Register 2 – PHY Identifier 1 (MR2), address 0x02 This register, along with MR3, provides a 32-bit value indicating the manufacturer, model, and revision information. Ethernet PHY Management Register 2 – PHY Identifier 1 (MR2) Base 0x4004.8000 Address 0x02 Type RO, reset 0x000E 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 OUI[21:6] Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 Bit/Field Name Type Reset Description Organizationally Unique Identifier[21:6] This field, along with the OUI[5:0] field in MR3, makes up the Organizationally Unique Identifier indicating the PHY manufacturer. 15:0 OUI[21:6] RO 0x000E November 30, 2007 439 Preliminary LM3S6952 Microcontroller Register 19: Ethernet PHY Management Register 3 – PHY Identifier 2 (MR3), address 0x03 This register, along with MR2, provides a 32-bit value indicating the manufacturer, model, and revision information. Ethernet PHY Management Register 3 – PHY Identifier 2 (MR3) Base 0x4004.8000 Address 0x03 Type RO, reset 0x7237 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 OUI[5:0] MN RN Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 1 1 0 0 1 0 0 0 1 1 0 1 1 1 Bit/Field Name Type Reset Description Organizationally Unique Identifier[5:0] This field, along with the OUI[21:6] field in MR2, makes up the Organizationally Unique Identifier indicating the PHY manufacturer. 15:10 OUI[5:0] RO 0x1C Model Number The MN field represents the Model Number of the PHY. 9:4 MN RO 0x23 Revision Number The RN field represents the Revision Number of the PHY. 3:0 RN RO 0x7 440 November 30, 2007 Preliminary Ethernet Controller Register 20: Ethernet PHY Management Register 4 – Auto-Negotiation Advertisement (MR4), address 0x04 This register provides the advertised abilities of the PHY used during Auto-Negotiation. Bits 8:5 represent the Technology Ability Field bits. This field can be overwritten by software to Auto-Negotiate to an alternate common technology. Writing to this register has no effect until Auto-Negotiation is re-initiated. Ethernet PHY Management Register 4 – Auto-Negotiation Advertisement (MR4) Base 0x4004.8000 Address 0x04 Type R/W, reset 0x01E1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 NP reserved RF reserved A3 A2 A1 A0 S[4:0] Type RO RO R/W RO RO RO RO R/W R/W R/W R/W RO RO RO RO RO Reset 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 Bit/Field Name Type Reset Description Next Page When set, indicates the PHY is capable of Next Page exchanges to provide more detailed information on the PHY’s capabilities. 15 NP RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 14 reserved RO 0 Remote Fault When set, indicates to the link partner that a Remote Fault condition has been encountered. 13 RF R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12:9 reserved RO 0 Technology Ability Field[3] When set, indicates that the PHY supports the 100Base-TX full-duplex signaling protocol. If software wants to ensure that this mode is not used, this bit can be written to 0 and Auto-Negotiation re-initiated with the RANEG bit in the MR0 register. 8 A3 R/W 1 Technology Ability Field[2] When set, indicates that the PHY supports the 100Base-T half-duplex signaling protocol. If software wants to ensure that this mode is not used, this bit can be written to 0 and Auto-Negotiation re-initiated. 7 A2 R/W 1 Technology Ability Field[1] When set, indicates that the PHY supports the 10Base-T full-duplex signaling protocol. If software wants to ensure that this mode is not used, this bit can be written to 0 and Auto-Negotiation re-initiated. 6 A1 R/W 1 Technology Ability Field[0] When set, indicates that the PHY supports the 10Base-T half-duplex signaling protocol. If software wants to ensure that this mode is not used, this bit can be written to 0 and Auto-Negotiation re-initiated. 5 A0 R/W 1 November 30, 2007 441 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Selector Field The S[4:0] field encodes 32 possible messages for communicating between PHYs. This field is hard-coded to 0x01, indicating that the Stellaris® PHY is IEEE 802.3 compliant. 4:0 S[4:0] RO 0x01 442 November 30, 2007 Preliminary Ethernet Controller Register 21: Ethernet PHY Management Register 5 – Auto-Negotiation Link Partner Base Page Ability (MR5), address 0x05 This register provides the advertised abilities of the link partner’s PHY that are received and stored during Auto-Negotiation. Ethernet PHY Management Register 5 – Auto-Negotiation Link Partner Base Page Ability (MR5) Base 0x4004.8000 Address 0x05 Type RO, reset 0x0000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 NP ACK RF A[7:0] S[4:0] Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Next Page When set, indicates that the link partner’s PHY is capable of Next page exchanges to provide more detailed information on the PHY’s capabilities. 15 NP RO 0 Acknowledge When set, indicates that the device has successfully received the link partner’s advertised abilities during Auto-Negotiation. 14 ACK RO 0 Remote Fault Used as a standard transport mechanism for transmitting simple fault information. 13 RF RO 0 Technology Ability Field The A[7:0] field encodes individual technologies that are supported by the PHY. See the MR4 register. 12:5 A[7:0] RO 0x00 Selector Field The S[4:0] field encodes possible messages for communicating between PHYs. Value Description 0x00 Reserved 0x01 IEEE Std 802.3 0x02 IEEE Std 802.9 ISLAN-16T 0x03 IEEE Std 802.5 0x04 IEEE Std 1394 0x05–0x1F Reserved 4:0 S[4:0] RO 0x00 November 30, 2007 443 Preliminary LM3S6952 Microcontroller Register 22: Ethernet PHY Management Register 6 – Auto-Negotiation Expansion (MR6), address 0x06 This register enables software to determine the Auto-Negotiation and Next Page capabilities of the PHY and the link partner after Auto-Negotiation. Ethernet PHY Management Register 6 – Auto-Negotiation Expansion (MR6) Base 0x4004.8000 Address 0x06 Type RO, reset 0x0000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PDF LPNPA reserved PRX LPANEGA Type RO RO RO RO RO RO RO RO RO RO RO RC RO RO RC RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:5 reserved RO 0x000 Parallel Detection Fault When set, indicates that more than one technology has been detected at link up. This bit is cleared when read. 4 PDF RC 0 Link Partner is Next Page Able When set, indicates that the link partner is Next Page Able. 3 LPNPA RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2 reserved RO 0x000 New Page Received When set, indicates that a New Page has been received from the link partner and stored in the appropriate location. This bit remains set until the register is read. 1 PRX RC 0 Link Partner is Auto-Negotiation Able When set, indicates that the Link partner is Auto-Negotiation Able. 0 LPANEGA RO 0 444 November 30, 2007 Preliminary Ethernet Controller Register 23: Ethernet PHY Management Register 16 – Vendor-Specific (MR16), address 0x10 This register enables software to configure the operation of vendor-specific modes of the PHY. Ethernet PHY Management Register 16 – Vendor-Specific (MR16) Base 0x4004.8000 Address 0x10 Type R/W, reset 0x0140 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 RPTR INPOL reserved TXHIM SQEI NL10 reserved APOL RVSPOL reserved PCSBP RXCC Type R/W R/W RO R/W R/W R/W RO RO RO RO R/W R/W RO RO R/W R/W Reset 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 Bit/Field Name Type Reset Description Repeater Mode When set, enables the repeater mode of operation. In this mode, full-duplex is not allowed and the Carrier Sense signal only responds to receive activity. If the PHY is configured to 10Base-T mode, the SQE test function is disabled. 15 RPTR R/W 0 Interrupt Polarity 1: Sets the polarity of the PHY interrupt to be active High. 0: Sets the polarity of the PHY interrupt to active Low. Important: Because the Media Access Controller expects active Low interrupts from the PHY, this bit must always be written with a 0 to ensure proper operation. 14 INPOL R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 13 reserved RO 0 Transmit High Impedance Mode When set, enables the transmitter High Impedance mode. In this mode, the TXOP and TXON transmitter pins are put into a high impedance state. The RXIP and RXIN pins remain fully functional. 12 TXHIM R/W 0 SQE Inhibit Testing When set, prohibits 10Base-T SQE testing. When 0, the SQE testing is performed by generating a Collision pulse following the completion of the transmission of a frame. 11 SQEI R/W 0 Natural Loopback Mode When set, enables the 10Base-T Natural Loopback mode. This causes the transmission data received by the PHY to be looped back onto the receive data path when 10Base-T mode is enabled. 10 NL10 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 9:6 reserved RO 0x05 November 30, 2007 445 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Auto-Polarity Disable When set, disables the PHY’s auto-polarity function. If this bit is 0, the PHY automatically inverts the received signal due to a wrong polarity connection during Auto-Negotiation if the PHY is in 10Base-T mode. 5 APOL R/W 0 Receive Data Polarity This bit indicates whether the receive data pulses are being inverted. If the APOL bit is 0, then the RVSPOL bit is read-only and indicates whether the auto-polarity circuitry is reversing the polarity. In this case, a 1 in the RVSPOL bit indicates that the receive data is inverted while a 0 indicates that the receive data is not inverted. If the APOL bit is 1, then the RVSPOL bit is writable and software can force the receive data to be inverted. Setting RVSPOL to 1 forces the receive data to be inverted while a 0 does not invert the receive data. 4 RVSPOL R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0 PCS Bypass When set, enables the bypass of the PCS and scrambling/descrambling functions in 100Base-TX mode. This mode is only valid when Auto-Negotiation is disabled and 100Base-T mode is enabled. 1 PCSBP R/W 0 Receive Clock Control When set, enables the Receive Clock Control power saving mode if the PHY is configured in 100Base-TX mode. This mode shuts down the receive clock when no data is being received from the physical medium to save power. This mode should not be used when PCSBP is enabled and is automatically disabled when the LOOPBK bit in the MR0 register is set. 0 RXCC R/W 0 446 November 30, 2007 Preliminary Ethernet Controller Register 24: Ethernet PHY Management Register 17 – Interrupt Control/Status (MR17), address 0x11 This register provides the means for controlling and observing the events, which trigger a PHY interrupt in the MACRIS register. This register can also be used in a polling mode via the MII Serial Interface as a means to observe key events within the PHY via one register address. Bits 0 through 7 are status bits, which are each set to logic 1 based on an event. These bits are cleared after the register is read. Bits 8 through 15 of this register, when set to logic 1, enable their corresponding bit in the lower byte to signal a PHY interrupt in the MACRIS register. Ethernet PHY Management Register 17 – Interrupt Control/Status (MR17) Base 0x4004.8000 Address 0x11 Type R/W, reset 0x0000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 JABBER_IE RXER_IE PRX_IE PDF_IE LPACK_IELSCHG_IE RFAULT_IE ANEGCOMP_IE JABBER_INTRXER_INT PRX_INT PDF_INT LPACK_INT LSCHG_INT RFAULT_INT ANEGCOMP_INT Type R/W R/W R/W R/W R/W R/W R/W R/W RC RC RC RC RC RC RC RC Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Jabber Interrupt Enable When set, enables system interrupts when a Jabber condition is detected by the PHY. 15 JABBER_IE R/W 0 Receive Error Interrupt Enable When set, enables system interrupts when a receive error is detected by the PHY. 14 RXER_IE R/W 0 Page Received Interrupt Enable When set, enables system interrupts when a new page is received by the PHY. 13 PRX_IE R/W 0 Parallel Detection Fault Interrupt Enable When set, enables system interrupts when a Parallel Detection Fault is detected by the PHY. 12 PDF_IE R/W 0 LP Acknowledge Interrupt Enable When set, enables system interrupts when FLP bursts are received with the Acknowledge bit during Auto-Negotiation. 11 LPACK_IE R/W 0 Link Status Change Interrupt Enable When set, enables system interrupts when the Link Status changes from OK to FAIL. 10 LSCHG_IE R/W 0 Remote Fault Interrupt Enable When set, enables system interrupts when a Remote Fault condition is signaled by the link partner. 9 RFAULT_IE R/W 0 Auto-Negotiation Complete Interrupt Enable When set, enables system interrupts when the Auto-Negotiation sequence has completed successfully. 8 ANEGCOMP_IE R/W 0 November 30, 2007 447 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Jabber Event Interrupt When set, indicates that a Jabber event has been detected by the 10Base-T circuitry. 7 JABBER_INT RC 0 Receive Error Interrupt When set, indicates that a receive error has been detected by the PHY. 6 RXER_INT RC 0 Page Receive Interrupt When set, indicates that a new page has been received from the link partner during Auto-Negotiation. 5 PRX_INT RC 0 Parallel Detection Fault Interrupt When set, indicates that a Parallel Detection Fault has been detected by the PHY during the Auto-Negotiation process. 4 PDF_INT RC 0 LP Acknowledge Interrupt When set, indicates that an FLP burst has been received with the Acknowledge bit set during Auto-Negotiation. 3 LPACK_INT RC 0 Link Status Change Interrupt When set, indicates that the link status has changed from OK to FAIL. 2 LSCHG_INT RC 0 Remote Fault Interrupt When set, indicates that a Remote Fault condition has been signaled by the link partner. 1 RFAULT_INT RC 0 Auto-Negotiation Complete Interrupt When set, indicates that the Auto-Negotiation sequence has completed successfully. 0 ANEGCOMP_INT RC 0 448 November 30, 2007 Preliminary Ethernet Controller Register 25: Ethernet PHY Management Register 18 – Diagnostic (MR18), address 0x12 This register enables software to diagnose the results of the previous Auto-Negotiation. Ethernet PHY Management Register 18 – Diagnostic (MR18) Base 0x4004.8000 Address 0x12 Type RO, reset 0x0000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ANEGF DPLX RATE RXSD RX_LOCK reserved Type RO RO RO RC RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 Auto-Negotiation Failure When set, indicates that no common technology was found during Auto-Negotiation and has failed. This bit remains set until read. 12 ANEGF RC 0 Duplex Mode When set, indicates that Full-Duplex was the highest common denominator found during the Auto-Negotiation process. Otherwise, Half-Duplex was the highest common denominator found. 11 DPLX RO 0 Rate When set, indicates that 100Base-TX was the highest common denominator found during the Auto-Negotiation process. Otherwise, 10Base-TX was the highest common denominator found. 10 RATE RO 0 Receive Detection When set, indicates that receive signal detection has occurred (in 100Base-TX mode) or that Manchester-encoded data has been detected (in 10Base-T mode). 9 RXSD RO 0 Receive PLL Lock When set, indicates that the Receive PLL has locked onto the receive signal for the selected speed of operation (10Base-T or 100Base-TX). 8 RX_LOCK RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:0 reserved RO 00 November 30, 2007 449 Preliminary LM3S6952 Microcontroller Register 26: Ethernet PHY Management Register 19 – Transceiver Control (MR19), address 0x13 This register enables software to set the gain of the transmit output to compensate for transformer loss. Ethernet PHY Management Register 19 – Transceiver Control (MR19) Base 0x4004.8000 Address 0x13 Type R/W, reset 0x4000 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 TXO[1:0] reserved Type R/W R/W RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Transmit Amplitude Selection The TXO[1:0] field sets the transmit output amplitude to account for transmit transformer insertion loss. Value Description 0x0 Gain set for 0.0dB of insertion loss 0x1 Gain set for 0.4dB of insertion loss 0x2 Gain set for 0.8dB of insertion loss 0x3 Gain set for 1.2dB of insertion loss 15:14 TXO[1:0] R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 13:0 reserved RO 0x0 450 November 30, 2007 Preliminary Ethernet Controller Register 27: Ethernet PHY Management Register 23 – LED Configuration (MR23), address 0x17 This register enables software to select the source that will cause the LEDs to toggle. Ethernet PHY Management Register 23 – LED Configuration (MR23) Base 0x4004.8000 Address 0x17 Type R/W, reset 0x0010 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved LED1[3:0] LED0[3:0] Type RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:8 reserved RO 0x0 LED1 Source The LED1 field selects the source that will toggle the LED1 signal. Value Description 0x0 Link OK 0x1 RX or TX Activity (Default LED1) 0x2 TX Activity 0x3 RX Activity 0x4 Collision 0x5 100BASE-TX mode 0x6 10BASE-T mode 0x7 Full-Duplex 0x8 Link OK & Blink=RX or TX Activity 7:4 LED1[3:0] R/W 1 LED0 Source The LED0 field selects the source that will toggle the LED0 signal. Value Description 0x0 Link OK (Default LED0) 0x1 RX or TX Activity 0x2 TX Activity 0x3 RX Activity 0x4 Collision 0x5 100BASE-TX mode 0x6 10BASE-T mode 0x7 Full-Duplex 0x8 Link OK & Blink=RX or TX Activity 3:0 LED0[3:0] R/W 0 November 30, 2007 451 Preliminary LM3S6952 Microcontroller Register 28: Ethernet PHY Management Register 24 –MDI/MDIX Control (MR24), address 0x18 This register enables software to control the behavior of the MDI/MDIX mux and its switching capabilities. Ethernet PHY Management Register 24 –MDI/MDIX Control (MR24) Base 0x4004.8000 Address 0x18 Type R/W, reset 0x00C0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PD_MODEAUTO_SW MDIX MDIX_CM MDIX_SD Type RO RO RO RO RO RO RO RO R/W R/W R/W RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:8 reserved RO 0x0 Parallel Detection Mode When set, enables the Parallel Detection mode and allows auto-switching to work when Auto-Negotiation is not enabled. 7 PD_MODE R/W 0 Auto-Switching Enable When set, enables Auto-Switching of the MDI/MDIX mux. 6 AUTO_SW R/W 0 Auto-Switching Configuration When set, indicates that the MDI/MDIX mux is in the crossover (MDIX) configuration. When 0, it indicates that the mux is in the pass-through (MDI) configuration. When the AUTO_SW bit is 1, the MDIX bit is read-only. When the AUTO_SW bit is 0, the MDIX bit is read/write and can be configured manually. 5 MDIX R/W 0 Auto-Switching Complete When set, indicates that the auto-switching sequence has completed. If 0, it indicates that the sequence has not completed or that auto-switching is disabled. 4 MDIX_CM RO 0 Auto-Switching Seed This field provides the initial seed for the switching algorithm. This seed directly affects the number of attempts [5,4] respectively to write bits [3:0]. A 0 sets the seed to 0x5. 3:0 MDIX_SD R/W 0 452 November 30, 2007 Preliminary Ethernet Controller 17 Analog Comparators An analog comparator is a peripheral that compares two analog voltages, and provides a logical output that signals the comparison result. The LM3S6952 controller provides three independent integrated analog comparators that can be configured to drive an output or generate an interrupt or ADC event. Note: Not all comparators have the option to drive an output pin. See the Comparator Operating Mode tables for more information. A comparator can compare a test voltage against any one of these voltages: ■ An individual external reference voltage ■ A shared single external reference voltage ■ A shared internal reference voltage The comparator can provide its output to a device pin, acting as a replacement for an analog comparator on the board, or it can be used to signal the application via interrupts or triggers to the ADC to cause it to start capturing a sample sequence. The interrupt generation and ADC triggering logic is separate. This means, for example, that an interrupt can be generated on a rising edge and the ADC triggered on a falling edge. November 30, 2007 453 Preliminary LM3S6952 Microcontroller 17.1 Block Diagram Figure 17-1. Analog Comparator Module Block Diagram interrupt C2+ C2- output +ve input (alternate) +ve input interrupt -ve input reference input Comparator 2 ACSTAT2 ACCTL2 interrupt C1- C1+ output +ve input (alternate) +ve input interrupt -ve input reference input Comparator 1 ACSTAT1 ACCTL1 C1o Voltage Ref ACREFCTL output +ve input (alternate) +ve input interrupt -ve input reference input Comparator 0 ACSTAT0 ACCTL0 C0+ internal bus interrupt C0- C0o trigger trigger trigger trigger trigger trigger 17.2 Functional Description Important: It is recommended that the Digital-Input enable (the GPIODEN bit in the GPIO module) for the analog input pin be disabled to prevent excessive current draw from the I/O pads. The comparator compares the VIN- and VIN+ inputs to produce an output, VOUT. VIN- < VIN+, VOUT = 1 VIN- > VIN+, VOUT = 0 As shown in Figure 17-2 on page 455, the input source for VIN- is an external input. In addition to an external input, input sources for VIN+ can be the +ve input of comparator 0 or an internal reference. 454 November 30, 2007 Preliminary Analog Comparators Figure 17-2. Structure of Comparator Unit ACCTL ACSTAT IntGen 2 TrigGen 1 0 CINV output -ve input +ve input interrupt internal bus trigger +ve input (alternate) reference input A comparator is configured through two status/control registers (ACCTL and ACSTAT ). The internal reference is configured through one control register (ACREFCTL). Interrupt status and control is configured through three registers (ACMIS, ACRIS, and ACINTEN). The operating modes of the comparators are shown in the Comparator Operating Mode tables. Typically, the comparator output is used internally to generate controller interrupts. It may also be used to drive an external pin or generate an analog-to-digital converter (ADC) trigger. Important: Certain register bit values must be set before using the analog comparators. The proper pad configuration for the comparator input and output pins are described in the Comparator Operating Mode tables. Table 17-1. Comparator 0 Operating Modes ACCNTL0 Comparator 0 ASRCP VIN- VIN+ Output Interrupt ADCTrigger 00 C0- C0+ C0o yes yes 01 C0- C0+ C0o yes yes 10 C0- Vref C0o yes yes 11 C0- reserved C0o yes yes Table 17-2. Comparator 1 Operating Modes ACCNTL1 Comparator 1 ASRCP VIN- VIN+ Output Interrupt ADCTrigger 00 C1- C1o/C1+ C1o/C1+ yes yes 01 C1- C0+ C1o/C1+ yes yes 10 C1- Vref C1o/C1+ yes yes 11 C1- reserved C1o/C1+ yes yes November 30, 2007 455 Preliminary LM3S6952 Microcontroller Table 17-3. Comparator 2 Operating Modes ACCNTL2 Comparator 2 ASRCP VIN- VIN+ Output Interrupt ADCTrigger 00 C2- C2+ n/a yes yes 01 C2- C0+ n/a yes yes 10 C2- Vref n/a yes yes 11 C2- reserved n/a yes yes 17.2.1 Internal Reference Programming The structure of the internal reference is shown in Figure 17-3 on page 456. This is controlled by a single configuration register (ACREFCTL). Table 17-4 on page 456 shows the programming options to develop specific internal reference values, to compare an external voltage against a particular voltage generated internally. Figure 17-3. Comparator Internal Reference Structure 8R R R 8R R R ••• ••• 0 Decoder 15 14 1 AVDD EN internal reference VREF RNG Table 17-4. Internal Reference Voltage and ACREFCTL Field Values ACREFCTL Register Output Reference Voltage Based on VREF Field Value EN Bit Value RNG Bit Value 0 V (GND) for any value of VREF; however, it is recommended that RNG=1 and VREF=0 for the least noisy ground reference. EN=0 RNG=X 456 November 30, 2007 Preliminary Analog Comparators ACREFCTL Register Output Reference Voltage Based on VREF Field Value EN Bit Value RNG Bit Value Total resistance in ladder is 32 R. VREF AVDD R V REF RT = × ---------------- VREF AVDD (VREF + 8) 32 = × ------------------------------ VR EF = 0.825 + 0.103 VREF The range of internal reference in this mode is 0.825-2.37 V. EN=1 RNG=0 Total resistance in ladder is 24 R. VREF AVDD R V REF RT = × ---------------- VREF AVDD (VREF) 24 = × -------------------- VREF = 0.1375 x VREF The range of internal reference for this mode is 0.0-2.0625 V. RNG=1 17.3 Initialization and Configuration The following example shows how to configure an analog comparator to read back its output value from an internal register. 1. Enable the analog comparator 0 clock by writing a value of 0x0010.0000 to the RCGC1 register in the System Control module. 2. In the GPIO module, enable the GPIO port/pin associated with C0- as a GPIO input. 3. Configure the internal voltage reference to 1.65 V by writing the ACREFCTL register with the value 0x0000.030C. 4. Configure comparator 0 to use the internal voltage reference and to not invert the output on the C0o pin by writing the ACCTL0 register with the value of 0x0000.040C. 5. Delay for some time. 6. Read the comparator output value by reading the ACSTAT0 register’s OVAL value. Change the level of the signal input on C0- to see the OVAL value change. 17.4 Register Map Table 17-5 on page 458 lists the comparator registers. The offset listed is a hexadecimal increment to the register’s address, relative to the Analog Comparator base address of 0x4003.C000. November 30, 2007 457 Preliminary LM3S6952 Microcontroller Table 17-5. Analog Comparators Register Map See Offset Name Type Reset Description page 0x00 ACMIS R/W1C 0x0000.0000 Analog Comparator Masked Interrupt Status 459 0x04 ACRIS RO 0x0000.0000 Analog Comparator Raw Interrupt Status 460 0x08 ACINTEN R/W 0x0000.0000 Analog Comparator Interrupt Enable 461 0x10 ACREFCTL R/W 0x0000.0000 Analog Comparator Reference Voltage Control 462 0x20 ACSTAT0 RO 0x0000.0000 Analog Comparator Status 0 463 0x24 ACCTL0 R/W 0x0000.0000 Analog Comparator Control 0 464 0x40 ACSTAT1 RO 0x0000.0000 Analog Comparator Status 1 463 0x44 ACCTL1 R/W 0x0000.0000 Analog Comparator Control 1 464 0x60 ACSTAT2 RO 0x0000.0000 Analog Comparator Status 2 463 0x64 ACCTL2 R/W 0x0000.0000 Analog Comparator Control 2 464 17.5 Register Descriptions The remainder of this section lists and describes the Analog Comparator registers, in numerical order by address offset. 458 November 30, 2007 Preliminary Analog Comparators Register 1: Analog Comparator Masked Interrupt Status (ACMIS), offset 0x00 This register provides a summary of the interrupt status (masked) of the comparator. Analog Comparator Masked Interrupt Status (ACMIS) Base 0x4003.C000 Offset 0x00 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IN2 IN1 IN0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 Comparator 2 Masked Interrupt Status Gives the masked interrupt state of this interrupt. Write 1 to this bit to clear the pending interrupt. 2 IN2 R/W1C 0 Comparator 1 Masked Interrupt Status Gives the masked interrupt state of this interrupt. Write 1 to this bit to clear the pending interrupt. 1 IN1 R/W1C 0 Comparator 0 Masked Interrupt Status Gives the masked interrupt state of this interrupt. Write 1 to this bit to clear the pending interrupt. 0 IN0 R/W1C 0 November 30, 2007 459 Preliminary LM3S6952 Microcontroller Register 2: Analog Comparator Raw Interrupt Status (ACRIS), offset 0x04 This register provides a summary of the interrupt status (raw) of the comparator. Analog Comparator Raw Interrupt Status (ACRIS) Base 0x4003.C000 Offset 0x04 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IN2 IN1 IN0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 Comparator 2 Interrupt Status When set, indicates that an interrupt has been generated by comparator 2. 2 IN2 RO 0 Comparator 1 Interrupt Status When set, indicates that an interrupt has been generated by comparator 1. 1 IN1 RO 0 Comparator 0 Interrupt Status When set, indicates that an interrupt has been generated by comparator 0. 0 IN0 RO 0 460 November 30, 2007 Preliminary Analog Comparators Register 3: Analog Comparator Interrupt Enable (ACINTEN), offset 0x08 This register provides the interrupt enable for the comparator. Analog Comparator Interrupt Enable (ACINTEN) Base 0x4003.C000 Offset 0x08 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IN2 IN1 IN0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:3 reserved RO 0x00 Comparator 2 Interrupt Enable When set, enables the controller interrupt from the comparator 2 output 2 IN2 R/W 0 Comparator 1 Interrupt Enable When set, enables the controller interrupt from the comparator 1 output. 1 IN1 R/W 0 Comparator 0 Interrupt Enable When set, enables the controller interrupt from the comparator 0 output. 0 IN0 R/W 0 November 30, 2007 461 Preliminary LM3S6952 Microcontroller Register 4: Analog Comparator Reference Voltage Control (ACREFCTL), offset 0x10 This register specifies whether the resistor ladder is powered on as well as the range and tap. Analog Comparator Reference Voltage Control (ACREFCTL) Base 0x4003.C000 Offset 0x10 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved EN RNG reserved VREF Type RO RO RO RO RO RO R/W R/W RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:10 reserved RO 0x00 Resistor Ladder Enable The EN bit specifies whether the resistor ladder is powered on. If 0, the resistor ladder is unpowered. If 1, the resistor ladder is connected to the analog VDD. This bit is reset to 0 so that the internal reference consumes the least amount of power if not used and programmed. 9 EN R/W 0 Resistor Ladder Range The RNG bit specifies the range of the resistor ladder. If 0, the resistor ladder has a total resistance of 32 R. If 1, the resistor ladder has a total resistance of 24 R. 8 RNG R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:4 reserved RO 0x00 Resistor Ladder Voltage Ref The VREF bit field specifies the resistor ladder tap that is passed through an analog multiplexer. The voltage corresponding to the tap position is the internal reference voltage available for comparison. See Table 17-4 on page 456 for some output reference voltage examples. 3:0 VREF R/W 0x00 462 November 30, 2007 Preliminary Analog Comparators Register 5: Analog Comparator Status 0 (ACSTAT0), offset 0x20 Register 6: Analog Comparator Status 1 (ACSTAT1), offset 0x40 Register 7: Analog Comparator Status 2 (ACSTAT2), offset 0x60 These registers specify the current output value of the comparator. Analog Comparator Status 0 (ACSTAT0) Base 0x4003.C000 Offset 0x20 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved OVAL reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Comparator Output Value The OVAL bit specifies the current output value of the comparator. 1 OVAL RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 November 30, 2007 463 Preliminary LM3S6952 Microcontroller Register 8: Analog Comparator Control 0 (ACCTL0), offset 0x24 Register 9: Analog Comparator Control 1 (ACCTL1), offset 0x44 Register 10: Analog Comparator Control 2 (ACCTL2), offset 0x64 These registers configure the comparator’s input and output. Analog Comparator Control 0 (ACCTL0) Base 0x4003.C000 Offset 0x24 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TOEN ASRCP reserved TSLVAL TSEN ISLVAL ISEN CINV reserved Type RO RO RO RO R/W R/W R/W RO R/W R/W R/W R/W R/W R/W R/W RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0x00 Trigger Output Enable The TOEN bit enables the ADC event transmission to the ADC. If 0, the event is suppressed and not sent to the ADC. If 1, the event is transmitted to the ADC. 11 TOEN R/W 0 Analog Source Positive The ASRCP field specifies the source of input voltage to the VIN+ terminal of the comparator. The encodings for this field are as follows: Value Function 0x0 Pin value 0x1 Pin value of C0+ 0x2 Internal voltage reference 0x3 Reserved 10:9 ASRCP R/W 0x00 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 8 reserved RO 0 Trigger Sense Level Value The TSLVAL bit specifies the sense value of the input that generates an ADC event if in Level Sense mode. If 0, an ADC event is generated if the comparator output is Low. Otherwise, an ADC event is generated if the comparator output is High. 7 TSLVAL R/W 0 464 November 30, 2007 Preliminary Analog Comparators Bit/Field Name Type Reset Description Trigger Sense The TSEN field specifies the sense of the comparator output that generates an ADC event. The sense conditioning is as follows: Value Function 0x0 Level sense, see TSLVAL 0x1 Falling edge 0x2 Rising edge 0x3 Either edge 6:5 TSEN R/W 0x0 Interrupt Sense Level Value The ISLVAL bit specifies the sense value of the input that generates an interrupt if in Level Sense mode. If 0, an interrupt is generated if the comparator output is Low. Otherwise, an interrupt is generated if the comparator output is High. 4 ISLVAL R/W 0 Interrupt Sense The ISEN field specifies the sense of the comparator output that generates an interrupt. The sense conditioning is as follows: Value Function 0x0 Level sense, see ISLVAL 0x1 Falling edge 0x2 Rising edge 0x3 Either edge 3:2 ISEN R/W 0x0 Comparator Output Invert The CINV bit conditionally inverts the output of the comparator. If 0, the output of the comparator is unchanged. If 1, the output of the comparator is inverted prior to being processed by hardware. 1 CINV R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 November 30, 2007 465 Preliminary LM3S6952 Microcontroller 18 Pulse Width Modulator (PWM) Pulse width modulation (PWM) is a powerful technique for digitally encoding analog signal levels. High-resolution counters are used to generate a square wave, and the duty cycle of the square wave is modulated to encode an analog signal. Typical applications include switching power supplies and motor control. The Stellaris® PWM module consists of two PWM generator blocks and a control block. Each PWM generator block contains one timer (16-bit down or up/down counter), two PWM comparators, a PWM signal generator, a dead-band generator, and an interrupt/ADC-trigger selector. The control block determines the polarity of the PWM signals, and which signals are passed through to the pins. Each PWM generator block produces two PWM signals that can either be independent signals (other than being based on the same timer and therefore having the same frequency) or a single pair of complementary signals with dead-band delays inserted. The output of the PWM generation blocks are managed by the output control block before being passed to the device pins. The Stellaris® PWM module provides a great deal of flexibility. It can generate simple PWM signals, such as those required by a simple charge pump. It can also generate paired PWM signals with dead-band delays, such as those required by a half-H bridge driver. 18.1 Block Diagram Figure 18-1 on page 466 provides a block diagram of a Stellaris® PWM module. The LM3S6952 controller contains two generator blocks (PWM0 and PWM1) and generates four independent PWM signals or two paired PWM signals with dead-band delays inserted. Figure 18-1. PWM Module Block Diagram Interrupt and Trigger Generate PWMnINTEN PWMnRIS PWMnISC PWM Clock Interrupt Dead-Band Generator PWMnDBCTL PWMnDBRISE PWMnDBFALL PWM Output Control PWMENABLE PWMINVERT PWMFAULT PWM Generator PWMnGENA PWMnGENB pwma pwmb Timer PWMnLOAD PWMnCOUNT Comparator A PWMnCMPA Comparator B PWMnCMPB zero load dir 16 cmpA cmpB Fault PWM Generator Block 18.2 Functional Description 18.2.1 PWM Timer The timer in each PWM generator runs in one of two modes: Count-Down mode or Count-Up/Down mode. In Count-Down mode, the timer counts from the load value to zero, goes back to the load value, and continues counting down. In Count-Up/Down mode, the timer counts from zero up to the load value, back down to zero, back up to the load value, and so on. Generally, Count-Down mode 466 November 30, 2007 Preliminary Pulse Width Modulator (PWM) is used for generating left- or right-aligned PWM signals, while the Count-Up/Down mode is used for generating center-aligned PWM signals. The timers output three signals that are used in the PWM generation process: the direction signal (this is always Low in Count-Down mode, but alternates between Low and High in Count-Up/Down mode), a single-clock-cycle-width High pulse when the counter is zero, and a single-clock-cycle-width High pulse when the counter is equal to the load value. Note that in Count-Down mode, the zero pulse is immediately followed by the load pulse. 18.2.2 PWM Comparators There are two comparators in each PWM generator that monitor the value of the counter; when either match the counter, they output a single-clock-cycle-width High pulse. When in Count-Up/Down mode, these comparators match both when counting up and when counting down; they are therefore qualified by the counter direction signal. These qualified pulses are used in the PWM generation process. If either comparator match value is greater than the counter load value, then that comparator never outputs a High pulse. Figure 18-2 on page 467 shows the behavior of the counter and the relationship of these pulses when the counter is in Count-Down mode. Figure 18-3 on page 468 shows the behavior of the counter and the relationship of these pulses when the counter is in Count-Up/Down mode. Figure 18-2. PWM Count-Down Mode Load Zero CompB CompA Load Zero B A Dir ADown BDown November 30, 2007 467 Preliminary LM3S6952 Microcontroller Figure 18-3. PWM Count-Up/Down Mode Load Zero CompB CompA Load Zero B A Dir BUp AUp ADown BDown 18.2.3 PWM Signal Generator The PWM generator takes these pulses (qualified by the direction signal), and generates two PWM signals. In Count-Down mode, there are four events that can affect the PWM signal: zero, load, match A down, and match B down. In Count-Up/Down mode, there are six events that can affect the PWM signal: zero, load, match A down, match A up, match B down, and match B up. The match A or match B events are ignored when they coincide with the zero or load events. If the match A and match B events coincide, the first signal, PWMA, is generated based only on the match A event, and the second signal, PWMB, is generated based only on the match B event. For each event, the effect on each output PWM signal is programmable: it can be left alone (ignoring the event), it can be toggled, it can be driven Low, or it can be driven High. These actions can be used to generate a pair of PWM signals of various positions and duty cycles, which do or do not overlap. Figure 18-4 on page 468 shows the use of Count-Up/Down mode to generate a pair of center-aligned, overlapped PWM signals that have different duty cycles. Figure 18-4. PWM Generation Example In Count-Up/Down Mode Load Zero CompB CompA PWMB PWMA In this example, the first generator is set to drive High on match A up, drive Low on match A down, and ignore the other four events. The second generator is set to drive High on match B up, drive Low on match B down, and ignore the other four events. Changing the value of comparator A 468 November 30, 2007 Preliminary Pulse Width Modulator (PWM) changes the duty cycle of the PWMA signal, and changing the value of comparator B changes the duty cycle of the PWMB signal. 18.2.4 Dead-Band Generator The two PWM signals produced by the PWM generator are passed to the dead-band generator. If disabled, the PWM signals simply pass through unmodified. If enabled, the second PWM signal is lost and two PWM signals are generated based on the first PWM signal. The first output PWM signal is the input signal with the rising edge delayed by a programmable amount. The second output PWM signal is the inversion of the input signal with a programmable delay added between the falling edge of the input signal and the rising edge of this new signal. This is therefore a pair of active High signals where one is always High, except for a programmable amount of time at transitions where both are Low. These signals are therefore suitable for driving a half-H bridge, with the dead-band delays preventing shoot-through current from damaging the power electronics. Figure 18-5 on page 469 shows the effect of the dead-band generator on an input PWM signal. Figure 18-5. PWM Dead-Band Generator Input PWMA PWMB Rising Edge Delay Falling Edge Delay 18.2.5 Interrupt/ADC-Trigger Selector The PWM generator also takes the same four (or six) counter events and uses them to generate an interrupt or an ADC trigger. Any of these events or a set of these events can be selected as a source for an interrupt; when any of the selected events occur, an interrupt is generated. Additionally, the same event, a different event, the same set of events, or a different set of events can be selected as a source for an ADC trigger; when any of these selected events occur, an ADC trigger pulse is generated. The selection of events allows the interrupt or ADC trigger to occur at a specific position within the PWM signal. Note that interrupts and ADC triggers are based on the raw events; delays in the PWM signal edges caused by the dead-band generator are not taken into account. 18.2.6 Synchronization Methods There is a global reset capability that can synchronously reset any or all of the counters in the PWM generators. If multiple PWM generators are configured with the same counter load value, this can be used to guarantee that they also have the same count value (this does imply that the PWM generators must be configured before they are synchronized). With this, more than two PWM signals can be produced with a known relationship between the edges of those signals since the counters always have the same values. The counter load values and comparator match values of the PWM generator can be updated in two ways. The first is immediate update mode, where a new value is used as soon as the counter reaches zero. By waiting for the counter to reach zero, a guaranteed behavior is defined, and overly short or overly long output PWM pulses are prevented. The other update method is synchronous, where the new value is not used until a global synchronized update signal is asserted, at which point the new value is used as soon as the counter reaches zero. This second mode allows multiple items in multiple PWM generators to be updated November 30, 2007 469 Preliminary LM3S6952 Microcontroller simultaneously without odd effects during the update; everything runs from the old values until a point at which they all run from the new values. The Update mode of the load and comparator match values can be individually configured in each PWM generator block. It typically makes sense to use the synchronous update mechanism across PWM generator blocks when the timers in those blocks are synchronized, though this is not required in order for this mechanism to function properly. 18.2.7 Fault Conditions There are two external conditions that affect the PWM block; the signal input on the Fault pin and the stalling of the controller by a debugger. There are two mechanisms available to handle such conditions: the output signals can be forced into an inactive state and/or the PWM timers can be stopped. Each output signal has a fault bit. If set, a fault input signal causes the corresponding output signal to go into the inactive state. If the inactive state is a safe condition for the signal to be in for an extended period of time, this keeps the output signal from driving the outside world in a dangerous manner during the fault condition. A fault condition can also generate a controller interrupt. Each PWM generator can also be configured to stop counting during a stall condition. The user can select for the counters to run until they reach zero then stop, or to continue counting and reloading. A stall condition does not generate a controller interrupt. 18.2.8 Output Control Block With each PWM generator block producing two raw PWM signals, the output control block takes care of the final conditioning of the PWM signals before they go to the pins. Via a single register, the set of PWM signals that are actually enabled to the pins can be modified; this can be used, for example, to perform commutation of a brushless DC motor with a single register write (and without modifying the individual PWM generators, which are modified by the feedback control loop). Similarly, fault control can disable any of the PWM signals as well. A final inversion can be applied to any of the PWM signals, making them active Low instead of the default active High. 18.3 Initialization and Configuration The following example shows how to initialize the PWM Generator 0 with a 25-KHz frequency, and with a 25% duty cycle on the PWM0 pin and a 75% duty cycle on the PWM1 pin. This example assumes the system clock is 20 MHz. 1. Enable the PWM clock by writing a value of 0x0010.0000 to the RCGC0 register in the System Control module. 2. Enable the clock to the appropriate GPIO module via the RCGC2 register in the System Control module. 3. In the GPIO module, enable the appropriate pins for their alternate function using the GPIOAFSEL register. 4. Configure the Run-Mode Clock Configuration (RCC) register in the System Control module to use the PWM divide (USEPWMDIV) and set the divider (PWMDIV) to divide by 2 (000). 5. Configure the PWM generator for countdown mode with immediate updates to the parameters. ■ Write the PWM0CTL register with a value of 0x0000.0000. ■ Write the PWM0GENA register with a value of 0x0000.008C. 470 November 30, 2007 Preliminary Pulse Width Modulator (PWM) ■ Write the PWM0GENB register with a value of 0x0000.080C. 6. Set the period. For a 25-KHz frequency, the period = 1/25,000, or 40 microseconds. The PWM clock source is 10 MHz; the system clock divided by 2. This translates to 400 clock ticks per period. Use this value to set the PWM0LOAD register. In Count-Down mode, set the Load field in the PWM0LOAD register to the requested period minus one. ■ Write the PWM0LOAD register with a value of 0x0000.018F. 7. Set the pulse width of the PWM0 pin for a 25% duty cycle. ■ Write the PWM0CMPA register with a value of 0x0000.012B. 8. Set the pulse width of the PWM1 pin for a 75% duty cycle. ■ Write the PWM0CMPB register with a value of 0x0000.0063. 9. Start the timers in PWM generator 0. ■ Write the PWM0CTL register with a value of 0x0000.0001. 10. Enable PWM outputs. ■ Write the PWMENABLE register with a value of 0x0000.0003. 18.4 Register Map Table 18-1 on page 471 lists the PWM registers. The offset listed is a hexadecimal increment to the register’s address, relative to the PWM base address of 0x4002.8000. Table 18-1. PWM Register Map See Offset Name Type Reset Description page 0x000 PWMCTL R/W 0x0000.0000 PWM Master Control 473 0x004 PWMSYNC R/W 0x0000.0000 PWM Time Base Sync 474 0x008 PWMENABLE R/W 0x0000.0000 PWM Output Enable 475 0x00C PWMINVERT R/W 0x0000.0000 PWM Output Inversion 476 0x010 PWMFAULT R/W 0x0000.0000 PWM Output Fault 477 0x014 PWMINTEN R/W 0x0000.0000 PWM Interrupt Enable 478 0x018 PWMRIS RO 0x0000.0000 PWM Raw Interrupt Status 479 0x01C PWMISC R/W1C 0x0000.0000 PWM Interrupt Status and Clear 480 0x020 PWMSTATUS RO 0x0000.0000 PWM Status 481 0x040 PWM0CTL R/W 0x0000.0000 PWM0 Control 482 0x044 PWM0INTEN R/W 0x0000.0000 PWM0 Interrupt and Trigger Enable 484 0x048 PWM0RIS RO 0x0000.0000 PWM0 Raw Interrupt Status 486 0x04C PWM0ISC R/W1C 0x0000.0000 PWM0 Interrupt Status and Clear 487 November 30, 2007 471 Preliminary LM3S6952 Microcontroller See Offset Name Type Reset Description page 0x050 PWM0LOAD R/W 0x0000.0000 PWM0 Load 488 0x054 PWM0COUNT RO 0x0000.0000 PWM0 Counter 489 0x058 PWM0CMPA R/W 0x0000.0000 PWM0 Compare A 490 0x05C PWM0CMPB R/W 0x0000.0000 PWM0 Compare B 491 0x060 PWM0GENA R/W 0x0000.0000 PWM0 Generator A Control 492 0x064 PWM0GENB R/W 0x0000.0000 PWM0 Generator B Control 495 0x068 PWM0DBCTL R/W 0x0000.0000 PWM0 Dead-Band Control 498 0x06C PWM0DBRISE R/W 0x0000.0000 PWM0 Dead-Band Rising-Edge Delay 499 0x070 PWM0DBFALL R/W 0x0000.0000 PWM0 Dead-Band Falling-Edge-Delay 500 0x080 PWM1CTL R/W 0x0000.0000 PWM1 Control 482 0x084 PWM1INTEN R/W 0x0000.0000 PWM1 Interrupt and Trigger Enable 484 0x088 PWM1RIS RO 0x0000.0000 PWM1 Raw Interrupt Status 486 0x08C PWM1ISC R/W1C 0x0000.0000 PWM1 Interrupt Status and Clear 487 0x090 PWM1LOAD R/W 0x0000.0000 PWM1 Load 488 0x094 PWM1COUNT RO 0x0000.0000 PWM1 Counter 489 0x098 PWM1CMPA R/W 0x0000.0000 PWM1 Compare A 490 0x09C PWM1CMPB R/W 0x0000.0000 PWM1 Compare B 491 0x0A0 PWM1GENA R/W 0x0000.0000 PWM1 Generator A Control 492 0x0A4 PWM1GENB R/W 0x0000.0000 PWM1 Generator B Control 495 0x0A8 PWM1DBCTL R/W 0x0000.0000 PWM1 Dead-Band Control 498 0x0AC PWM1DBRISE R/W 0x0000.0000 PWM1 Dead-Band Rising-Edge Delay 499 0x0B0 PWM1DBFALL R/W 0x0000.0000 PWM1 Dead-Band Falling-Edge-Delay 500 18.5 Register Descriptions The remainder of this section lists and describes the PWM registers, in numerical order by address offset. 472 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 1: PWM Master Control (PWMCTL), offset 0x000 This register provides master control over the PWM generation blocks. PWM Master Control (PWMCTL) Base 0x4002.8000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GlobalSync1 GlobalSync0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Update PWM Generator 1 Same as GlobalSync0 but for PWM generator 1. 1 GlobalSync1 R/W 0 Update PWM Generator 0 Setting this bit causes any queued update to a load or comparator register in PWM generator 0 to be applied the next time the corresponding counter becomes zero. This bit automatically clears when the updates have completed; it cannot be cleared by software. 0 GlobalSync0 R/W 0 November 30, 2007 473 Preliminary LM3S6952 Microcontroller Register 2: PWM Time Base Sync (PWMSYNC), offset 0x004 This register provides a method to perform synchronization of the counters in the PWM generation blocks. Writing a bit in this register to 1 causes the specified counter to reset back to 0; writing multiple bits resets multiple counters simultaneously. The bits auto-clear after the reset has occurred; reading them back as zero indicates that the synchronization has completed. PWM Time Base Sync (PWMSYNC) Base 0x4002.8000 Offset 0x004 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved Sync1 Sync0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Reset Generator 1 Counter Performs a reset of the PWM generator 1 counter. 1 Sync1 R/W 0 Reset Generator 0 Counter Performs a reset of the PWM generator 0 counter. 0 Sync0 R/W 0 474 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 3: PWM Output Enable (PWMENABLE), offset 0x008 This register provides a master control of which generated PWM signals are output to device pins. By disabling a PWM output, the generation process can continue (for example, when the time bases are synchronized) without driving PWM signals to the pins. When bits in this register are set, the corresponding PWM signal is passed through to the output stage, which is controlled by the PWMINVERT register. When bits are not set, the PWM signal is replaced by a zero value which is also passed to the output stage. PWM Output Enable (PWMENABLE) Base 0x4002.8000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWM3En PWM2En PWM1En PWM0En Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 PWM3 Output Enable When set, allows the generated PWM3 signal to be passed to the device pin. 3 PWM3En R/W 0 PWM2 Output Enable When set, allows the generated PWM2 signal to be passed to the device pin. 2 PWM2En R/W 0 PWM1 Output Enable When set, allows the generated PWM1 signal to be passed to the device pin. 1 PWM1En R/W 0 PWM0 Output Enable When set, allows the generated PWM0 signal to be passed to the device pin. 0 PWM0En R/W 0 November 30, 2007 475 Preliminary LM3S6952 Microcontroller Register 4: PWM Output Inversion (PWMINVERT), offset 0x00C This register provides a master control of the polarity of the PWM signals on the device pins. The PWM signals generated by the PWM generator are active High; they can optionally be made active Low via this register. Disabled PWM channels are also passed through the output inverter (if so configured) so that inactive channels maintain the correct polarity. PWM Output Inversion (PWMINVERT) Base 0x4002.8000 Offset 0x00C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWM3Inv PWM2Inv PWM1Inv PWM0Inv Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 Invert PWM3 Signal When set, the generated PWM3 signal is inverted. 3 PWM3Inv R/W 0 Invert PWM2 Signal When set, the generated PWM2 signal is inverted. 2 PWM2Inv R/W 0 Invert PWM1 Signal When set, the generated PWM1 signal is inverted. 1 PWM1Inv R/W 0 Invert PWM0 Signal When set, the generated PWM0 signal is inverted. 0 PWM0Inv R/W 0 476 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 5: PWM Output Fault (PWMFAULT), offset 0x010 This register controls the behavior of the PWM outputs in the presence of fault conditions. Both the fault input and debug events are considered fault conditions. On a fault condition, each PWM signal can either be passed through unmodified or driven Low. For outputs that are configured for pass-through, the debug event handling on the corresponding PWM generator also determines if the PWM signal continues to be generated. Fault condition control happens before the output inverter, so PWM signals driven Low on fault are inverted if the channel is configured for inversion (therefore, the pin is driven High on a fault condition). PWM Output Fault (PWMFAULT) Base 0x4002.8000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved Fault3 Fault2 Fault1 Fault0 Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 PWM3 Driven Low on Fault When set, the PWM3 output signal is driven Low on a fault condition. 3 Fault3 R/W 0 PWM2 Driven Low on Fault When set, the PWM2 output signal is driven Low on a fault condition. 2 Fault2 R/W 0 PWM1 Driven Low on Fault When set, the PWM1 output signal is driven Low on a fault condition. 1 Fault1 R/W 0 PWM0 Driven Low on Fault When set, the PWM0 output signal is driven Low on a fault condition. 0 Fault0 R/W 0 November 30, 2007 477 Preliminary LM3S6952 Microcontroller Register 6: PWM Interrupt Enable (PWMINTEN), offset 0x014 This register controls the global interrupt generation capabilities of the PWM module. The events that can cause an interrupt are the fault input and the individual interrupts from the PWM generators. PWM Interrupt Enable (PWMINTEN) Base 0x4002.8000 Offset 0x014 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved IntFault Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntPWM1 IntPWM0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:17 reserved RO 0x00 Fault Interrupt Enable When 1, an interrupt occurs when the fault input is asserted. 16 IntFault R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:2 reserved RO 0x00 PWM1 Interrupt Enable When 1, an interrupt occurs when the PWM generator 1 block asserts an interrupt. 1 IntPWM1 R/W 0 PWM0 Interrupt Enable When 1, an interrupt occurs when the PWM generator 0 block asserts an interrupt. 0 IntPWM0 R/W 0 478 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 7: PWM Raw Interrupt Status (PWMRIS), offset 0x018 This register provides the current set of interrupt sources that are asserted, regardless of whether they cause an interrupt to be asserted to the controller. The fault interrupt is latched on detection; it must be cleared through the PWM Interrupt Status and Clear (PWMISC) register (see page 480). The PWM generator interrupts simply reflect the status of the PWM generators; they are cleared via the interrupt status register in the PWM generator blocks. Bits set to 1 indicate the events that are active; a zero bit indicates that the event in question is not active. PWM Raw Interrupt Status (PWMRIS) Base 0x4002.8000 Offset 0x018 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved IntFault Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntPWM1 IntPWM0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:17 reserved RO 0x00 Fault Interrupt Asserted Indicates that the fault input has been asserted. 16 IntFault RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:2 reserved RO 0x00 PWM1 Interrupt Asserted Indicates that the PWM generator 1 block is asserting its interrupt. 1 IntPWM1 RO 0 PWM0 Interrupt Asserted Indicates that the PWM generator 0 block is asserting its interrupt. 0 IntPWM0 RO 0 November 30, 2007 479 Preliminary LM3S6952 Microcontroller Register 8: PWM Interrupt Status and Clear (PWMISC), offset 0x01C This register provides a summary of the interrupt status of the individual PWM generator blocks. A bit set to 1 indicates that the corresponding generator block is asserting an interrupt. The individual interrupt status registers in each block must be consulted to determine the reason for the interrupt, and used to clear the interrupt. For the fault interrupt, a write of 1 to that bit position clears the latched interrupt status. PWM Interrupt Status and Clear (PWMISC) Base 0x4002.8000 Offset 0x01C Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved IntFault Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntPWM1 IntPWM0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:17 reserved RO 0x00 Fault Interrupt Asserted Indicates if the fault input is asserting an interrupt. 16 IntFault R/W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:2 reserved RO 0x00 PWM1 Interrupt Status Indicates if the PWM generator 1 block is asserting an interrupt. 1 IntPWM1 RO 0 PWM0 Interrupt Status Indicates if the PWM generator 0 block is asserting an interrupt. 0 IntPWM0 RO 0 480 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 9: PWM Status (PWMSTATUS), offset 0x020 This register provides the status of the Fault input signal. PWM Status (PWMSTATUS) Base 0x4002.8000 Offset 0x020 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved Fault Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Fault Interrupt Status When set to 1, indicates the fault input is asserted. 0 Fault RO 0 November 30, 2007 481 Preliminary LM3S6952 Microcontroller Register 10: PWM0 Control (PWM0CTL), offset 0x040 Register 11: PWM1 Control (PWM1CTL), offset 0x080 These registers configure the PWM signal generation blocks (PWM0CTL controls the PWM generator 0 block, and so on). The Register Update mode, Debug mode, Counting mode, and Block Enable mode are all controlled via these registers. The blocks produce the PWM signals, which can be either two independent PWM signals (from the same counter), or a paired set of PWM signals with dead-band delays added. The PWM0 block produces the PWM0 and PWM1 outputs, and the PWM1 block produces the PWM2 and PWM3 outputs. PWM0 Control (PWM0CTL) Base 0x4002.8000 Offset 0x040 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved CmpBUpdCmpAUpd LoadUpd Debug Mode Enable Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 Comparator B Update Mode Same as CmpAUpd but for the comparator B register. 5 CmpBUpd R/W 0 Comparator A Update Mode The Update mode for the comparator A register. If 0, updates to the register are reflected to the comparator the next time the counter is 0. If 1, updates to the register are delayed until the next time the counter is 0 after a synchronous update has been requested through the PWM Master Control (PWMCTL) register (see page 473). 4 CmpAUpd R/W 0 Load Register Update Mode The Update mode for the load register. If 0, updates to the register are reflected to the counter the next time the counter is 0. If 1, updates to the register are delayed until the next time the counter is 0 after a synchronous update has been requested through the PWM Master Control (PWMCTL) register. 3 LoadUpd R/W 0 Debug Mode The behavior of the counter in Debug mode. If 0, the counter stops running when it next reaches 0, and continues running again when no longer in Debug mode. If 1, the counter always runs. 2 Debug R/W 0 482 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Bit/Field Name Type Reset Description Counter Mode The mode for the counter. If 0, the counter counts down from the load value to 0 and then wraps back to the load value (Count-Down mode). If 1, the counter counts up from 0 to the load value, back down to 0, and then repeats (Count-Up/Down mode). 1 Mode R/W 0 PWM Block Enable Master enable for the PWM generation block. If 0, the entire block is disabled and not clocked. If 1, the block is enabled and produces PWM signals. 0 Enable R/W 0 November 30, 2007 483 Preliminary LM3S6952 Microcontroller Register 12: PWM0 Interrupt and Trigger Enable (PWM0INTEN), offset 0x044 Register 13: PWM1 Interrupt and Trigger Enable (PWM1INTEN), offset 0x084 These registers control the interrupt and ADC trigger generation capabilities of the PWM generators (PWM0INTEN controls the PWM generator 0 block, and so on). The events that can cause an interrupt or an ADC trigger are: ■ The counter being equal to the load register ■ The counter being equal to zero ■ The counter being equal to the comparator A register while counting up ■ The counter being equal to the comparator A register while counting down ■ The counter being equal to the comparator B register while counting up ■ The counter being equal to the comparator B register while counting down Any combination of these events can generate either an interruptor an ADC trigger, though no determination can be made as to the actual event that caused an ADC trigger if more than one is specified. PWM0 Interrupt and Trigger Enable (PWM0INTEN) Base 0x4002.8000 Offset 0x044 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved TrCmpBD TrCmpBU TrCmpAD TrCmpAU TrCntLoad TrCntZero reserved IntCmpBDIntCmpBUIntCmpADIntCmpAU IntCntLoad IntCntZero Type RO RO R/W R/W R/W R/W R/W R/W RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:14 reserved RO 0x00 Trigger for Counter=Comparator B Down When 1, a trigger pulse is output when the counter matches the comparator B value and the counter is counting down. 13 TrCmpBD R/W 0 Trigger for Counter=Comparator B Up When 1, a trigger pulse is output when the counter matches the comparator B value and the counter is counting up. 12 TrCmpBU R/W 0 Trigger for Counter=Comparator A Down When 1, a trigger pulse is output when the counter matches the comparator A value and the counter is counting down. 11 TrCmpAD R/W 0 484 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Bit/Field Name Type Reset Description Trigger for Counter=Comparator A Up When 1, a trigger pulse is output when the counter matches the comparator A value and the counter is counting up. 10 TrCmpAU R/W 0 Trigger for Counter=Load When 1, a trigger pulse is output when the counter matches the PWMnLOAD register. 9 TrCntLoad R/W 0 Trigger for Counter=0 When 1, a trigger pulse is output when the counter is 0. 8 TrCntZero R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7:6 reserved RO 0x0 Interrupt for Counter=Comparator B Down When 1, an interrupt occurs when the counter matches the comparator B value and the counter is counting down. 5 IntCmpBD R/W 0 Interrupt for Counter=Comparator B Up When 1, an interrupt occurs when the counter matches the comparator B value and the counter is counting up. 4 IntCmpBU R/W 0 Interrupt for Counter=Comparator A Down When 1, an interrupt occurs when the counter matches the comparator A value and the counter is counting down. 3 IntCmpAD R/W 0 Interrupt for Counter=Comparator A Up When 1, an interrupt occurs when the counter matches the comparator A value and the counter is counting up. 2 IntCmpAU R/W 0 Interrupt for Counter=Load When 1, an interrupt occurs when the counter matches the PWMnLOAD register. 1 IntCntLoad R/W 0 Interrupt for Counter=0 When 1, an interrupt occurs when the counter is 0. 0 IntCntZero R/W 0 November 30, 2007 485 Preliminary LM3S6952 Microcontroller Register 14: PWM0 Raw Interrupt Status (PWM0RIS), offset 0x048 Register 15: PWM1 Raw Interrupt Status (PWM1RIS), offset 0x088 These registers provide the current set of interrupt sources that are asserted, regardless of whether they cause an interrupt to be asserted to the controller (PWM0RIS controls the PWM generator 0 block, and so on). Bits set to 1 indicate the latched events that have occurred; a 0 bit indicates that the event in question has not occurred. PWM0 Raw Interrupt Status (PWM0RIS) Base 0x4002.8000 Offset 0x048 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntCmpBDIntCmpBUIntCmpADIntCmpAU IntCntLoad IntCntZero Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 Comparator B Down Interrupt Status Indicates that the counter has matched the comparator B value while counting down. 5 IntCmpBD RO 0 Comparator B Up Interrupt Status Indicates that the counter has matched the comparator B value while counting up. 4 IntCmpBU RO 0 Comparator A Down Interrupt Status Indicates that the counter has matched the comparator A value while counting down. 3 IntCmpAD RO 0 Comparator A Up Interrupt Status Indicates that the counter has matched the comparator A value while counting up. 2 IntCmpAU RO 0 Counter=Load Interrupt Status Indicates that the counter has matched the PWMnLOAD register. 1 IntCntLoad RO 0 Counter=0 Interrupt Status Indicates that the counter has matched 0. 0 IntCntZero RO 0 486 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 16: PWM0 Interrupt Status and Clear (PWM0ISC), offset 0x04C Register 17: PWM1 Interrupt Status and Clear (PWM1ISC), offset 0x08C These registers provide the current set of interrupt sources that are asserted to the controller (PWM0ISC controls the PWM generator 0 block, and so on). Bits set to 1 indicate the latched events that have occurred; a 0 bit indicates that the event in question has not occurred. These are R/W1C registers; writing a 1 to a bit position clears the corresponding interrupt reason. PWM0 Interrupt Status and Clear (PWM0ISC) Base 0x4002.8000 Offset 0x04C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntCmpBDIntCmpBUIntCmpADIntCmpAU IntCntLoad IntCntZero Type RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0x00 Comparator B Down Interrupt Indicates that the counter has matched the comparator B value while counting down. 5 IntCmpBD R/W1C 0 Comparator B Up Interrupt Indicates that the counter has matched the comparator B value while counting up. 4 IntCmpBU R/W1C 0 Comparator A Down Interrupt Indicates that the counter has matched the comparator A value while counting down. 3 IntCmpAD R/W1C 0 Comparator A Up Interrupt Indicates that the counter has matched the comparator A value while counting up. 2 IntCmpAU R/W1C 0 Counter=Load Interrupt Indicates that the counter has matched the PWMnLOAD register. 1 IntCntLoad R/W1C 0 Counter=0 Interrupt Indicates that the counter has matched 0. 0 IntCntZero R/W1C 0 November 30, 2007 487 Preliminary LM3S6952 Microcontroller Register 18: PWM0 Load (PWM0LOAD), offset 0x050 Register 19: PWM1 Load (PWM1LOAD), offset 0x090 These registers contain the load value for the PWM counter (PWM0LOAD controls the PWM generator 0 block, and so on). Based on the counter mode, either this value is loaded into the counter after it reaches zero, or it is the limit of up-counting after which the counter decrements back to zero. If the Load Value Update mode is immediate, this value is used the next time the counter reaches zero; if the mode is synchronous, it is used the next time the counter reaches zero after a synchronous update has been requested through the PWM Master Control (PWMCTL) register (see page 473). If this register is re-written before the actual update occurs, the previous value is never used and is lost. PWM0 Load (PWM0LOAD) Base 0x4002.8000 Offset 0x050 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Load Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 Counter Load Value The counter load value. 15:0 Load R/W 0 488 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 20: PWM0 Counter (PWM0COUNT), offset 0x054 Register 21: PWM1 Counter (PWM1COUNT), offset 0x094 These registers contain the current value of the PWM counter (PWM0COUNT is the value of the PWM generator 0 block, and so on). When this value matches the load register, a pulse is output; this can drive the generation of a PWM signal (via the PWMnGENA/PWMnGENB registers, see page 492 and page 495) or drive an interrupt or ADC trigger (via the PWMnINTEN register, see page 484). A pulse with the same capabilities is generated when this value is zero. PWM0 Counter (PWM0COUNT) Base 0x4002.8000 Offset 0x054 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Count Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 Counter Value The current value of the counter. 15:0 Count RO 0x00 November 30, 2007 489 Preliminary LM3S6952 Microcontroller Register 22: PWM0 Compare A (PWM0CMPA), offset 0x058 Register 23: PWM1 Compare A (PWM1CMPA), offset 0x098 These registers contain a value to be compared against the counter (PWM0CMPA controls the PWM generator 0 block, and so on). When this value matches the counter, a pulse is output; this can drive the generation of a PWM signal (via the PWMnGENA/PWMnGENB registers) or drive an interrupt or ADC trigger (via the PWMnINTEN register). If the value of this register is greater than the PWMnLOAD register (see page 488), then no pulse is ever output. If the comparator A update mode is immediate (based on the CmpAUpd bit in the PWMnCTL register), then this 16-bit CompA value is used the next time the counter reaches zero. If the update mode is synchronous, it is used the next time the counter reaches zero after a synchronous update has been requested through the PWM Master Control (PWMCTL) register (see page 473). If this register is rewritten before the actual update occurs, the previous value is never used and is lost. PWM0 Compare A (PWM0CMPA) Base 0x4002.8000 Offset 0x058 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 CompA Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 Comparator A Value The value to be compared against the counter. 15:0 CompA R/W 0x00 490 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 24: PWM0 Compare B (PWM0CMPB), offset 0x05C Register 25: PWM1 Compare B (PWM1CMPB), offset 0x09C These registers contain a value to be compared against the counter (PWM0CMPB controls the PWM generator 0 block, and so on). When this value matches the counter, a pulse is output; this can drive the generation of a PWM signal (via the PWMnGENA/PWMnGENB registers) or drive an interrupt or ADC trigger (via the PWMnINTEN register). If the value of this register is greater than the PWMnLOAD register, then no pulse is ever output. IF the comparator B update mode is immediate (based on the CmpBUpd bit in the PWMnCTL register), then this 16-bit CompB value is used the next time the counter reaches zero. If the update mode is synchronous, it is used the next time the counter reaches zero after a synchronous update has been requested through the PWM Master Control (PWMCTL) register (see page 473). If this register is rewritten before the actual update occurs, the previous value is never used and is lost. PWM0 Compare B (PWM0CMPB) Base 0x4002.8000 Offset 0x05C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 CompB Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:16 reserved RO 0x00 Comparator B Value The value to be compared against the counter. 15:0 CompB R/W 0x00 November 30, 2007 491 Preliminary LM3S6952 Microcontroller Register 26: PWM0 Generator A Control (PWM0GENA), offset 0x060 Register 27: PWM1 Generator A Control (PWM1GENA), offset 0x0A0 These registers control the generation of the PWMnA signal based on the load and zero output pulses from the counter, as well as the compare A and compare B pulses from the comparators (PWM0GENA controls the PWM generator 0 block, and so on). When the counter is running in Count-Down mode, only four of these events occur; when running in Count-Up/Down mode, all six occur. These events provide great flexibility in the positioning and duty cycle of the PWM signal that is produced. The PWM0GENA register controls generation of the PWM0A signal; PWM1GENA, the PWM1A signal. If a zero or load event coincides with a compare A or compare B event, the zero or load action is taken and the compare A or compare B action is ignored. If a compare A event coincides with a compare B event, the compare A action is taken and the compare B action is ignored. PWM0 Generator A Control (PWM0GENA) Base 0x4002.8000 Offset 0x060 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero Type RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0x00 Action for Comparator B Down The action to be taken when the counter matches comparator B while counting down. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 11:10 ActCmpBD R/W 0x0 492 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Bit/Field Name Type Reset Description Action for Comparator B Up The action to be taken when the counter matches comparator B while counting up. Occurs only when the Mode bit in the PWMnCTL register (see page 482) is set to 1. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 9:8 ActCmpBU R/W 0x0 Action for Comparator A Down The action to be taken when the counter matches comparator A while counting down. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 7:6 ActCmpAD R/W 0x0 Action for Comparator A Up The action to be taken when the counter matches comparator A while counting up. Occurs only when the Mode bit in the PWMnCTL register is set to 1. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 5:4 ActCmpAU R/W 0x0 Action for Counter=Load The action to be taken when the counter matches the load value. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 3:2 ActLoad R/W 0x0 November 30, 2007 493 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Action for Counter=0 The action to be taken when the counter is zero. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 1:0 ActZero R/W 0x0 494 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 28: PWM0 Generator B Control (PWM0GENB), offset 0x064 Register 29: PWM1 Generator B Control (PWM1GENB), offset 0x0A4 These registers control the generation of the PWMnB signal based on the load and zero output pulses from the counter, as well as the compare A and compare B pulses from the comparators (PWM0GENB controls the PWM generator 0 block, and so on). When the counter is running in Down mode, only four of these events occur; when running in Up/Down mode, all six occur. These events provide great flexibility in the positioning and duty cycle of the PWM signal that is produced. The PWM0GENB register controls generation of the PWM0B signal; PWM1GENB, the PWM1B signal. If a zero or load event coincides with a compare A or compare B event, the zero or load action is taken and the compare A or compare B action is ignored. If a compare A event coincides with a compare B event, the compare B action is taken and the compare A action is ignored. PWM0 Generator B Control (PWM0GENB) Base 0x4002.8000 Offset 0x064 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero Type RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0x00 Action for Comparator B Down The action to be taken when the counter matches comparator B while counting down. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 11:10 ActCmpBD R/W 0x0 November 30, 2007 495 Preliminary LM3S6952 Microcontroller Bit/Field Name Type Reset Description Action for Comparator B Up The action to be taken when the counter matches comparator B while counting up. Occurs only when the Mode bit in the PWMnCTL register is set to 1. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 9:8 ActCmpBU R/W 0x0 Action for Comparator A Down The action to be taken when the counter matches comparator A while counting down. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 7:6 ActCmpAD R/W 0x0 Action for Comparator A Up The action to be taken when the counter matches comparator A while counting up. Occurs only when the Mode bit in the PWMnCTL register is set to 1. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 5:4 ActCmpAU R/W 0x0 Action for Counter=Load The action to be taken when the counter matches the load value. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 3:2 ActLoad R/W 0x0 496 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Bit/Field Name Type Reset Description Action for Counter=0 The action to be taken when the counter is 0. The table below defines the effect of the event on the output signal. Value Description 0x0 Do nothing. 0x1 Invert the output signal. 0x2 Set the output signal to 0. 0x3 Set the output signal to 1. 1:0 ActZero R/W 0x0 November 30, 2007 497 Preliminary LM3S6952 Microcontroller Register 30: PWM0 Dead-Band Control (PWM0DBCTL), offset 0x068 Register 31: PWM1 Dead-Band Control (PWM1DBCTL), offset 0x0A8 The PWM0DBCTL register controls the dead-band generator, which produces the PWM0 and PWM1 signals based on the PWM0A and PWM0B signals. When disabled, the PWM0A signal passes through to the PWM0 signal and the PWM0B signal passes through to the PWM1 signal. When enabled and inverting the resulting waveform, the PWM0B signal is ignored; the PWM0 signal is generated by delaying the rising edge(s) of the PWM0A signal by the value in the PWM0DBRISE register (see page 499), and the PWM1 signal is generated by delaying the falling edge(s) of the PWM0A signal by the value in the PWM0DBFALL register (see page 500). In a similar manner, PWM2 and PWM3 are produced from the PWM1A and PWM1B signals. PWM0 Dead-Band Control (PWM0DBCTL) Base 0x4002.8000 Offset 0x068 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved Enable Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:1 reserved RO 0x00 Dead-Band Generator Enable When set, the dead-band generator inserts dead bands into the output signals; when clear, it simply passes the PWM signals through. 0 Enable R/W 0 498 November 30, 2007 Preliminary Pulse Width Modulator (PWM) Register 32: PWM0 Dead-Band Rising-Edge Delay (PWM0DBRISE), offset 0x06C Register 33: PWM1 Dead-Band Rising-Edge Delay (PWM1DBRISE), offset 0x0AC The PWM0DBRISE register contains the number of clock ticks to delay the rising edge of the PWM0A signal when generating the PWM0 signal. If the dead-band generator is disabled through the PWMnDBCTL register, the PWM0DBRISE register is ignored. If the value of this register is larger than the width of a High pulse on the input PWM signal, the rising-edge delay consumes the entire High time of the signal, resulting in no High time on the output. Care must be taken to ensure that the input High time always exceeds the rising-edge delay. In a similar manner, PWM2 is generated from PWM1A with its rising edge delayed. PWM0 Dead-Band Rising-Edge Delay (PWM0DBRISE) Base 0x4002.8000 Offset 0x06C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved RiseDelay Type RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0x00 Dead-Band Rise Delay The number of clock ticks to delay the rising edge. 11:0 RiseDelay R/W 0 November 30, 2007 499 Preliminary LM3S6952 Microcontroller Register 34: PWM0 Dead-Band Falling-Edge-Delay (PWM0DBFALL), offset 0x070 Register 35: PWM1 Dead-Band Falling-Edge-Delay (PWM1DBFALL), offset 0x0B0 The PWM0DBFALL register contains the number of clock ticks to delay the falling edge of the PWM0A signal when generating the PWM1 signal. If the dead-band generator is disabled, this register is ignored. If the value of this register is larger than the width of a Low pulse on the input PWM signal, the falling-edge delay consumes the entire Low time of the signal, resulting in no Low time on the output. Care must be taken to ensure that the input Low time always exceeds the falling-edge delay. In a similar manner, PWM3 is generated from PWM1A with its falling edge delayed. PWM0 Dead-Band Falling-Edge-Delay (PWM0DBFALL) Base 0x4002.8000 Offset 0x070 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved FallDelay Type RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:12 reserved RO 0x00 Dead-Band Fall Delay The number of clock ticks to delay the falling edge. 11:0 FallDelay R/W 0x00 500 November 30, 2007 Preliminary Pulse Width Modulator (PWM) 19 Quadrature Encoder Interface (QEI) A quadrature encoder, also known as a 2-channel incremental encoder, converts linear displacement into a pulse signal. By monitoring both the number of pulses and the relative phase of the two signals, you can track the position, direction of rotation, and speed. In addition, a third channel, or index signal, can be used to reset the position counter. The Stellaris® quadrature encoder interface (QEI) module interprets the code produced by a quadrature encoder wheel to integrate position over time and determine direction of rotation. In addition, it can capture a running estimate of the velocity of the encoder wheel. The Stellaris® quadrature encoder has the following features: ■ Position integrator that tracks the encoder position ■ Velocity capture using built-in timer ■ Interrupt generation on: – Index pulse – Velocity-timer expiration – Direction change – Quadrature error detection 19.1 Block Diagram Figure 19-1 on page 501 provides a block diagram of a Stellaris® QEI module. Figure 19-1. QEI Block Diagram Quadrature Encoder Velocity Predivider Interrupt Control QEIINTEN QEIRIS QEIISC Position Integrator QEIMAXPOS QEIPOS Velocity Accumulator QEICOUNT QEISPEED Velocity Timer QEILOAD QEITIME PhA PhB IDX clk dir Interrupt Control & Status QEICTL QEISTAT November 30, 2007 501 Preliminary LM3S6952 Microcontroller 19.2 Functional Description The QEI module interprets the two-bit gray code produced by a quadrature encoder wheel to integrate position over time and determine direction of rotation. In addition, it can capture a running estimate of the velocity of the encoder wheel. The position integrator and velocity capture can be independently enabled, though the position integrator must be enabled before the velocity capture can be enabled. The two phase signals, PhA and PhB, can be swapped before being interpreted by the QEI module to change the meaning of forward and backward, and to correct for miswiring of the system. Alternatively, the phase signals can be interpreted as a clock and direction signal as output by some encoders. The QEI module supports two modes of signal operation: quadrature phase mode and clock/direction mode. In quadrature phase mode, the encoder produces two clocks that are 90 degrees out of phase; the edge relationship is used to determine the direction of rotation. In clock/direction mode, the encoder produces a clock signal to indicate steps and a direction signal to indicate the direction of rotation. This mode is determined by the SigMode bit of the QEI Control (QEICTL) register (see page 506). When the QEI module is set to use the quadrature phase mode (SigMode bit equals zero), the capture mode for the position integrator can be set to update the position counter on every edge of the PhA signal or to update on every edge of both PhA and PhB. Updating the position counter on every PhA and PhB provides more positional resolution at the cost of less range in the positional counter. When edges on PhA lead edges on PhB , the position counter is incremented. When edges on PhB lead edges on PhA , the position counter is decremented. When a rising and falling edge pair is seen on one of the phases without any edges on the other, the direction of rotation has changed. The positional counter is automatically reset on one of two conditions: sensing the index pulse or reaching the maximum position value. Which mode is determined by the ResMode bit of the QEI Control (QEICTL) register. When ResMode is 0, the positional counter is reset when the index pulse is sensed. This limits the positional counter to the values [0:N-1], where N is the number of phase edges in a full revolution of the encoder wheel. The QEIMAXPOS register must be programmed with N-1 so that the reverse direction from position 0 can move the position counter to N-1. In this mode, the position register contains the absolute position of the encoder relative to the index (or home) position once an index pulse has been seen. When ResMode is 1, the positional counter is constrained to the range [0:M], where M is the programmable maximum value. The index pulse is ignored by the positional counter in this mode. The velocity capture has a configurable timer and a count register. It counts the number of phase edges (using the same configuration as for the position integrator) in a given time period. The edge count from the previous time period is available to the controller via the QEISPEED register, while the edge count for the current time period is being accumulated in the QEICOUNT register. As soon as the current time period is complete, the total number of edges counted in that time period is made available in the QEISPEED register (losing the previous value), the QEICOUNT is reset to 0, and counting commences on a new time period. The number of edges counted in a given time period is directly proportional to the velocity of the encoder. Figure 19-2 on page 503 shows how the Stellaris® quadrature encoder converts the phase input signals into clock pulses, the direction signal, and how the velocity predivider operates (in Divide by 4 mode). 502 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Figure 19-2. Quadrature Encoder and Velocity Predivider Operation -1 -1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 +1 PhA PhB clk clkdiv dir pos rel The period of the timer is configurable by specifying the load value for the timer in the QEILOAD register. When the timer reaches zero, an interrupt can be triggered, and the hardware reloads the timer with the QEILOAD value and continues to count down. At lower encoder speeds, a longer timer period is needed to be able to capture enough edges to have a meaningful result. At higher encoder speeds, both a shorter timer period and/or the velocity predivider can be used. The following equation converts the velocity counter value into an rpm value: rpm = (clock * (2 ^ VelDiv) * Speed * 60) ÷ (Load * ppr * edges) where: clock is the controller clock rate ppr is the number of pulses per revolution of the physical encoder edges is 2 or 4, based on the capture mode set in the QEICTL register (2 for CapMode set to 0 and 4 for CapMode set to 1) For example, consider a motor running at 600 rpm. A 2048 pulse per revolution quadrature encoder is attached to the motor, producing 8192 phase edges per revolution. With a velocity predivider of ÷1 (VelDiv set to 0) and clocking on both PhA and PhB edges, this results in 81,920 pulses per second (the motor turns 10 times per second). If the timer were clocked at 10,000 Hz, and the load value was 2,500 (¼ of a second), it would count 20,480 pulses per update. Using the above equation: rpm = (10000 * 1 * 20480 * 60) ÷ (2500 * 2048 * 4) = 600 rpm Now, consider that the motor is sped up to 3000 rpm. This results in 409,600 pulses per second, or 102,400 every ¼ of a second. Again, the above equation gives: rpm = (10000 * 1 * 102400 * 60) ÷ (2500 * 2048 * 4) = 3000 rpm Care must be taken when evaluating this equation since intermediate values may exceed the capacity of a 32-bit integer. In the above examples, the clock is 10,000 and the divider is 2,500; both could be predivided by 100 (at compile time if they are constants) and therefore be 100 and 25. In fact, if they were compile-time constants, they could also be reduced to a simple multiply by 4, cancelled by the ÷4 for the edge-count factor. Important: Reducing constant factors at compile time is the best way to control the intermediate values of this equation, as well as reducing the processing requirement of computing this equation. The division can be avoided by selecting a timer load value such that the divisor is a power of 2; a simple shift can therefore be done in place of the division. For encoders with a power of 2 pulses per revolution, this is a simple matter of selecting a power of 2 load value. For other encoders, a load value must be selected such that the product is very close to a power of two. For example, a 100 pulse per revolution encoder could use a load value of 82, resulting in 32,800 as the divisor, November 30, 2007 503 Preliminary LM3S6952 Microcontroller which is 0.09% above 214; in this case a shift by 15 would be an adequate approximation of the divide in most cases. If absolute accuracy were required, the controller’s divide instruction could be used. The QEI module can produce a controller interrupt on several events: phase error, direction change, reception of the index pulse, and expiration of the velocity timer. Standard masking, raw interrupt status, interrupt status, and interrupt clear capabilities are provided. 19.3 Initialization and Configuration The following example shows how to configure the Quadrature Encoder module to read back an absolute position: 1. Enable the QEI clock by writing a value of 0x0000.0100 to the RCGC1 register in the System Control module. 2. Enable the clock to the appropriate GPIO module via the RCGC2 register in the System Control module. 3. In the GPIO module, enable the appropriate pins for their alternate function using the GPIOAFSEL register. 4. Configure the quadrature encoder to capture edges on both signals and maintain an absolute position by resetting on index pulses. Using a 1000-line encoder at four edges per line, there are 4000 pulses per revolution; therefore, set the maximum position to 3999 (0xF9F) since the count is zero-based. ■ Write the QEICTL register with the value of 0x0000.0018. ■ Write the QEIMAXPOS register with the value of 0x0000.0F9F. 5. Enable the quadrature encoder by setting bit 0 of the QEICTL register. 6. Delay for some time. 7. Read the encoder position by reading the QEIPOS register value. 19.4 Register Map Table 19-1 on page 504 lists the QEI registers. The offset listed is a hexadecimal increment to the register’s address, relative to the module’s base address: ■ QEI0: 0x4002.C000 Table 19-1. QEI Register Map See Offset Name Type Reset Description page 0x000 QEICTL R/W 0x0000.0000 QEI Control 506 0x004 QEISTAT RO 0x0000.0000 QEI Status 508 0x008 QEIPOS R/W 0x0000.0000 QEI Position 509 0x00C QEIMAXPOS R/W 0x0000.0000 QEI Maximum Position 510 0x010 QEILOAD R/W 0x0000.0000 QEI Timer Load 511 504 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) See Offset Name Type Reset Description page 0x014 QEITIME RO 0x0000.0000 QEI Timer 512 0x018 QEICOUNT RO 0x0000.0000 QEI Velocity Counter 513 0x01C QEISPEED RO 0x0000.0000 QEI Velocity 514 0x020 QEIINTEN R/W 0x0000.0000 QEI Interrupt Enable 515 0x024 QEIRIS RO 0x0000.0000 QEI Raw Interrupt Status 516 0x028 QEIISC R/W1C 0x0000.0000 QEI Interrupt Status and Clear 517 19.5 Register Descriptions The remainder of this section lists and describes the QEI registers, in numerical order by address offset. November 30, 2007 505 Preliminary LM3S6952 Microcontroller Register 1: QEI Control (QEICTL), offset 0x000 This register contains the configuration of the QEI module. Separate enables are provided for the quadrature encoder and the velocity capture blocks; the quadrature encoder must be enabled in order to capture the velocity, but the velocity does not need to be captured in applications that do not need it. The phase signal interpretation, phase swap, Position Update mode, Position Reset mode, and velocity predivider are all set via this register. QEI Control (QEICTL) QEI0 base: 0x4002.C000 Offset 0x000 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved STALLEN INVI INVB INVA VelDiv VelEn ResMode CapMode SigMode Swap Enable Type RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:13 reserved RO 0x00 Stall QEI When set, the QEI stalls when the microcontroller asserts Halt. 12 STALLEN R/W 0 Invert Index Pulse When set , the input Index Pulse is inverted. 11 INVI R/W 0 Invert PhB When set, the PhB input is inverted. 10 INVB R/W 0 Invert PhA When set, the PhA input is inverted. 9 INVA R/W 0 Predivide Velocity A predivider of the input quadrature pulses before being applied to the QEICOUNT accumulator. This field can be set to the following values: Value Predivider 0x0 ÷1 0x1 ÷2 0x2 ÷4 0x3 ÷8 0x4 ÷16 0x5 ÷32 0x6 ÷64 0x7 ÷128 8:6 VelDiv R/W 0x0 506 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Bit/Field Name Type Reset Description Capture Velocity When set, enables capture of the velocity of the quadrature encoder. 5 VelEn R/W 0 Reset Mode The Reset mode for the position counter. When 0, the position counter is reset when it reaches the maximum; when 1, the position counter is reset when the index pulse is captured. 4 ResMode R/W 0 Capture Mode The Capture mode defines the phase edges that are counted in the position. When 0, only the PhA edges are counted; when 1, the PhA and PhB edges are counted, providing twice the positional resolution but half the range. 3 CapMode R/W 0 Signal Mode When 1, the PhA and PhB signals are clock and direction; when 0, they are quadrature phase signals. 2 SigMode R/W 0 Swap Signals Swaps the PhA and PhB signals. 1 Swap R/W 0 Enable QEI Enables the quadrature encoder module. 0 Enable R/W 0 November 30, 2007 507 Preliminary LM3S6952 Microcontroller Register 2: QEI Status (QEISTAT), offset 0x004 This register provides status about the operation of the QEI module. QEI Status (QEISTAT) QEI0 base: 0x4002.C000 Offset 0x004 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved Direction Error Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x00 Direction of Rotation Indicates the direction the encoder is rotating. The Direction values are defined as follows: Value Description 0 Forward rotation 1 Reverse rotation 1 Direction RO 0 Error Detected Indicates that an error was detected in the gray code sequence (that is, both signals changing at the same time). 0 Error RO 0 508 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Register 3: QEI Position (QEIPOS), offset 0x008 This register contains the current value of the position integrator. Its value is updated by inputs on the QEI phase inputs, and can be set to a specific value by writing to it. QEI Position (QEIPOS) QEI0 base: 0x4002.C000 Offset 0x008 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Position Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Position Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Current Position Integrator Value The current value of the position integrator. 31:0 Position R/W 0x00 November 30, 2007 509 Preliminary LM3S6952 Microcontroller Register 4: QEI Maximum Position (QEIMAXPOS), offset 0x00C This register contains the maximum value of the position integrator. When moving forward, the position register resets to zero when it increments past this value. When moving backward, the position register resets to this value when it decrements from zero. QEI Maximum Position (QEIMAXPOS) QEI0 base: 0x4002.C000 Offset 0x00C Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 MaxPos Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MaxPos Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Maximum Position Integrator Value The maximum value of the position integrator. 31:0 MaxPos R/W 0x00 510 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Register 5: QEI Timer Load (QEILOAD), offset 0x010 This register contains the load value for the velocity timer. Since this value is loaded into the timer the clock cycle after the timer is zero, this value should be one less than the number of clocks in the desired period. So, for example, to have 2000 clocks per timer period, this register should contain 1999. QEI Timer Load (QEILOAD) QEI0 base: 0x4002.C000 Offset 0x010 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Load Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Load Type R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Velocity Timer Load Value The load value for the velocity timer. 31:0 Load R/W 0x00 November 30, 2007 511 Preliminary LM3S6952 Microcontroller Register 6: QEI Timer (QEITIME), offset 0x014 This register contains the current value of the velocity timer. This counter does not increment when VelEn in QEICTL is 0. QEI Timer (QEITIME) QEI0 base: 0x4002.C000 Offset 0x014 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Time Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Time Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Velocity Timer Current Value The current value of the velocity timer. 31:0 Time RO 0x00 512 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Register 7: QEI Velocity Counter (QEICOUNT), offset 0x018 This register contains the running count of velocity pulses for the current time period. Since this is a running total, the time period to which it applies cannot be known with precision (that is, a read of this register does not necessarily correspond to the time returned by the QEITIME register since there is a small window of time between the two reads, during which time either value may have changed). The QEISPEED register should be used to determine the actual encoder velocity; this register is provided for information purposes only. This counter does not increment when VelEn in QEICTL is 0. QEI Velocity Counter (QEICOUNT) QEI0 base: 0x4002.C000 Offset 0x018 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Count Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Count Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Velocity Pulse Count The running total of encoder pulses during this velocity timer period. 31:0 Count RO 0x00 November 30, 2007 513 Preliminary LM3S6952 Microcontroller Register 8: QEI Velocity (QEISPEED), offset 0x01C This register contains the most recently measured velocity of the quadrature encoder. This corresponds to the number of velocity pulses counted in the previous velocity timer period. This register does not update when VelEn in QEICTL is 0. QEI Velocity (QEISPEED) QEI0 base: 0x4002.C000 Offset 0x01C Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 Speed Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Speed Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Velocity The measured speed of the quadrature encoder in pulses per period. 31:0 Speed RO 0x00 514 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Register 9: QEI Interrupt Enable (QEIINTEN), offset 0x020 This register contains enables for each of the QEI module’s interrupts. An interrupt is asserted to the controller if its corresponding bit in this register is set to 1. QEI Interrupt Enable (QEIINTEN) QEI0 base: 0x4002.C000 Offset 0x020 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntError IntDir IntTimer IntIndex Type RO RO RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 Phase Error Interrupt Enable When 1, an interrupt occurs when a phase error is detected. 3 IntError R/W 0 Direction Change Interrupt Enable When 1, an interrupt occurs when the direction changes. 2 IntDir R/W 0 Timer Expires Interrupt Enable When 1, an interrupt occurs when the velocity timer expires. 1 IntTimer R/W 0 Index Pulse Detected Interrupt Enable When 1, an interrupt occurs when the index pulse is detected. 0 IntIndex R/W 0 November 30, 2007 515 Preliminary LM3S6952 Microcontroller Register 10: QEI Raw Interrupt Status (QEIRIS), offset 0x024 This register provides the current set of interrupt sources that are asserted, regardless of whether they cause an interrupt to be asserted to the controller (this is set through the QEIINTEN register). Bits set to 1 indicate the latched events that have occurred; a zero bit indicates that the event in question has not occurred. QEI Raw Interrupt Status (QEIRIS) QEI0 base: 0x4002.C000 Offset 0x024 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntError IntDir IntTimer IntIndex Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 Phase Error Detected Indicates that a phase error was detected. 3 IntError RO 0 Direction Change Detected Indicates that the direction has changed. 2 IntDir RO 0 Velocity Timer Expired Indicates that the velocity timer has expired. 1 IntTimer RO 0 Index Pulse Asserted Indicates that the index pulse has occurred. 0 IntIndex RO 0 516 November 30, 2007 Preliminary Quadrature Encoder Interface (QEI) Register 11: QEI Interrupt Status and Clear (QEIISC), offset 0x028 This register provides the current set of interrupt sources that are asserted to the controller. Bits set to 1 indicate the latched events that have occurred; a zero bit indicates that the event in question has not occurred. This is a R/W1C register; writing a 1 to a bit position clears the corresponding interrupt reason. QEI Interrupt Status and Clear (QEIISC) QEI0 base: 0x4002.C000 Offset 0x028 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved IntError IntDir IntTimer IntIndex Type RO RO RO RO RO RO RO RO RO RO RO RO R/W1C R/W1C R/W1C R/W1C Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:4 reserved RO 0x00 Phase Error Interrupt Indicates that a phase error was detected. 3 IntError R/W1C 0 Direction Change Interrupt Indicates that the direction has changed. 2 IntDir R/W1C 0 Velocity Timer Expired Interrupt Indicates that the velocity timer has expired. 1 IntTimer R/W1C 0 Index Pulse Interrupt Indicates that the index pulse has occurred. 0 IntIndex R/W1C 0 November 30, 2007 517 Preliminary LM3S6952 Microcontroller 20 Pin Diagram Figure 20-1 on page 518 shows the pin diagram and pin-to-signal-name mapping. Figure 20-1. Pin Connection Diagram LM3S6952 38 39 40 41 42 43 44 45 46 47 48 49 50 1 75 26 100 2 27 5 6 3 4 7 8 11 9 10 99 28 98 29 97 30 96 31 95 32 94 33 93 34 92 35 91 36 90 73 72 74 71 69 68 70 67 65 66 12 13 14 17 18 15 16 19 20 23 21 22 24 25 64 37 89 88 87 86 85 84 83 82 81 80 79 78 77 76 63 61 60 62 59 57 56 58 55 53 54 52 51 ADC0 ADC1 VDDA GNDA ADC2 PE4 LDO VDD GND PD0/PWM0 PD1/PWM1 PD2/U1Rx PD3/U1Tx VDD25 GND XTALPPHY XTALNPHY PG1/U2Tx PG0/U2Rx VDD GND PC7/C2- PC6/C2+ PC5/C1+/C1o PC4/PhA0 PA0/U0Rx PA1/U0Tx PA2/SSI0Clk PA3/SSI0Fss PA4/SSI0Rx PA5/SSI0Tx VDD GND PA6/CCP1 PA7 VCCPHY RXIN VDD25 GND RXIP GNDPHY GNDPHY TXOP VDD GND TXON PF0/PhB0 OSC0 OSC1 WAKE HIB XOSC0 XOSC1 GND VBAT VDD GND MDIO PF3/LED0 PF2/LED1 PF1 VDD25 GND RST CMOD0 PB0/PWM2 PB1/PWM3 VDD GND PB2/I2C0SCL PB3/I2C0SDA PE0/CCP3 PE1 PE2 PE3 CMOD1 PC3/TDO/SWO PC2/TDI PC1/TMS/SWDIO PC0/TCK/SWCLK VDD GND VCCPHY VCCPHY GNDPHY GNDPHY GND VDD25 PB7/TRST PB6/C0+/C0o PB5/C1- PB4/C0- VDD GND PD4/CCP0 PD5/CCP2 GNDA VDDA PD6/Fault PD7/IDX0 518 November 30, 2007 Preliminary Pin Diagram 21 Signal Tables The following tables list the signals available for each pin. Functionality is enabled by software with the GPIOAFSEL register. Important: All multiplexed pins are GPIOs by default, with the exception of the five JTAG pins (PB7 and PC[3:0]) which default to the JTAG functionality. Table 21-1 on page 519 shows the pin-to-signal-name mapping, including functional characteristics of the signals. Table 21-2 on page 523 lists the signals in alphabetical order by signal name. Table 21-3 on page 527 groups the signals by functionality, except for GPIOs. Table 21-4 on page 531 lists the GPIO pins and their alternate functionality. Table 21-1. Signals by Pin Number Pin Number Pin Name Pin Type Buffer Type Description 1 ADC0 I Analog Analog-to-digital converter input 0. 2 ADC1 I Analog Analog-to-digital converter input 1. The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. 3 VDDA - Power The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. 4 GNDA - Power 5 ADC2 I Analog Analog-to-digital converter input 2. 6 PE4 I/O TTL GPIO port E bit 4 Low drop-out regulator output voltage. This pin requires an external capacitor between the pin and GND of 1 μF or greater. When the on-chip LDO is used to provide power to the logic, the LDO pin must also be connected to the VDD25 pins at the board level in addition to the decoupling capacitor(s). 7 LDO - Power 8 VDD - Power Positive supply for I/O and some logic. 9 GND - Power Ground reference for logic and I/O pins. 10 PD0 I/O TTL GPIO port D bit 0 PWM0 O TTL PWM 0 11 PD1 I/O TTL GPIO port D bit 1 PWM1 O TTL PWM 1 12 PD2 I/O TTL GPIO port D bit 2 UART module 1 receive. When in IrDA mode, this signal has IrDA modulation. U1Rx I TTL 13 PD3 I/O TTL GPIO port D bit 3 UART module 1 transmit. When in IrDA mode, this signal has IrDA modulation. U1Tx O TTL November 30, 2007 519 Preliminary LM3S6952 Microcontroller Pin Number Pin Name Pin Type Buffer Type Description Positive supply for most of the logic function, including the processor core and most peripherals. 14 VDD25 - Power 15 GND - Power Ground reference for logic and I/O pins. 16 XTALPPHY O TTL XTALP of the Ethernet PHY 17 XTALNPHY I TTL XTALN of the Ethernet PHY 18 PG1 I/O TTL GPIO port G bit 1 UART 2 Transmit. When in IrDA mode, this signal has IrDA modulation. U2Tx O TTL 19 PG0 I/O TTL GPIO port G bit 0 UART 2 Receive. When in IrDA mode, this signal has IrDA modulation. U2Rx I TTL 20 VDD - Power Positive supply for I/O and some logic. 21 GND - Power Ground reference for logic and I/O pins. 22 PC7 I/O TTL GPIO port C bit 7 C2- I Analog Analog comparator 2 negative input 23 PC6 I/O TTL GPIO port C bit 6 C2+ I Analog Analog comparator positive input 24 PC5 I/O TTL GPIO port C bit 5 C1+ I Analog Analog comparator positive input C1o O TTL Analog comparator 1 output 25 PC4 I/O TTL GPIO port C bit 4 PhA0 I TTL QEI module 0 Phase A 26 PA0 I/O TTL GPIO port A bit 0 UART module 0 receive. When in IrDA mode, this signal has IrDA modulation. U0Rx I TTL 27 PA1 I/O TTL GPIO port A bit 1 UART module 0 transmit. When in IrDA mode, this signal has IrDA modulation. U0Tx O TTL 28 PA2 I/O TTL GPIO port A bit 2 SSI0Clk I/O TTL SSI module 0 clock 29 PA3 I/O TTL GPIO port A bit 3 SSI0Fss I/O TTL SSI module 0 frame 30 PA4 I/O TTL GPIO port A bit 4 SSI0Rx I TTL SSI module 0 receive 31 PA5 I/O TTL GPIO port A bit 5 SSI0Tx O TTL SSI module 0 transmit 32 VDD - Power Positive supply for I/O and some logic. 33 GND - Power Ground reference for logic and I/O pins. 34 PA6 I/O TTL GPIO port A bit 6 CCP1 I/O TTL Capture/Compare/PWM 1 35 PA7 I/O TTL GPIO port A bit 7 36 VCCPHY I TTL VCC of the Ethernet PHY 37 RXIN I Analog RXIN of the Ethernet PHY 520 November 30, 2007 Preliminary Signal Tables Pin Number Pin Name Pin Type Buffer Type Description Positive supply for most of the logic function, including the processor core and most peripherals. 38 VDD25 - Power 39 GND - Power Ground reference for logic and I/O pins. 40 RXIP I Analog RXIP of the Ethernet PHY 41 GNDPHY I TTL GND of the Ethernet PHY 42 GNDPHY I TTL GND of the Ethernet PHY 43 TXOP O Analog TXOP of the Ethernet PHY 44 VDD - Power Positive supply for I/O and some logic. 45 GND - Power Ground reference for logic and I/O pins. 46 TXON O Analog TXON of the Ethernet PHY 47 PF0 I/O TTL GPIO port F bit 0 PhB0 I TTL QEI module 1 Phase B Main oscillator crystal input or an external clock reference input. 48 OSC0 I Analog 49 OSC1 I Analog Main oscillator crystal output. An external input that brings the processor out of hibernate mode when asserted. 50 WAKE I OD An output that indicates the processor is in hibernate mode. 51 HIB O TTL Hibernation Module oscillator crystal input or an external clock reference input. Note that this is either a 4.19-MHz crystal or a 32.768-kHz oscillator for the Hibernation Module RTC. See the CLKSEL bit in the HIBCTL register. 52 XOSC0 I Analog 53 XOSC1 I Analog Hibernation Module oscillator crystal output. 54 GND - Power Ground reference for logic and I/O pins. Power source for the Hibernation Module. It is normally connected to the positive terminal of a battery and serves as the battery backup/Hibernation Module power-source supply. 55 VBAT - Power 56 VDD - Power Positive supply for I/O and some logic. 57 GND - Power Ground reference for logic and I/O pins. 58 MDIO I/O TTL MDIO of the Ethernet PHY 59 PF3 I/O TTL GPIO port F bit 3 LED0 O TTL MII LED 0 60 PF2 I/O TTL GPIO port F bit 2 LED1 O TTL MII LED 1 61 PF1 I/O TTL GPIO port F bit 1 Positive supply for most of the logic function, including the processor core and most peripherals. 62 VDD25 - Power 63 GND - Power Ground reference for logic and I/O pins. 64 RST I TTL System reset input. CPU Mode bit 0. Input must be set to logic 0 (grounded); other encodings reserved. 65 CMOD0 I/O TTL November 30, 2007 521 Preliminary LM3S6952 Microcontroller Pin Number Pin Name Pin Type Buffer Type Description 66 PB0 I/O TTL GPIO port B bit 0 PWM2 O TTL PWM 2 67 PB1 I/O TTL GPIO port B bit 1 PWM3 O TTL PWM 3 68 VDD - Power Positive supply for I/O and some logic. 69 GND - Power Ground reference for logic and I/O pins. 70 PB2 I/O TTL GPIO port B bit 2 I2C0SCL I/O OD I2C module 0 clock 71 PB3 I/O TTL GPIO port B bit 3 I2C0SDA I/O OD I2C module 0 data 72 PE0 I/O TTL GPIO port E bit 0 CCP3 I/O TTL Capture/Compare/PWM 3 73 PE1 I/O TTL GPIO port E bit 1 74 PE2 I/O TTL GPIO port E bit 2 75 PE3 I/O TTL GPIO port E bit 3 CPU Mode bit 1. Input must be set to logic 0 (grounded); other encodings reserved. 76 CMOD1 I/O TTL 77 PC3 I/O TTL GPIO port C bit 3 TDO O TTL JTAG TDO and SWO SWO O TTL JTAG TDO and SWO 78 PC2 I/O TTL GPIO port C bit 2 TDI I TTL JTAG TDI 79 PC1 I/O TTL GPIO port C bit 1 TMS I/O TTL JTAG TMS and SWDIO SWDIO I/O TTL JTAG TMS and SWDIO 80 PC0 I/O TTL GPIO port C bit 0 TCK I TTL JTAG/SWD CLK SWCLK I TTL JTAG/SWD CLK 81 VDD - Power Positive supply for I/O and some logic. 82 GND - Power Ground reference for logic and I/O pins. 83 VCCPHY I TTL VCC of the Ethernet PHY 84 VCCPHY I TTL VCC of the Ethernet PHY 85 GNDPHY I TTL GND of the Ethernet PHY 86 GNDPHY I TTL GND of the Ethernet PHY 87 GND - Power Ground reference for logic and I/O pins. Positive supply for most of the logic function, including the processor core and most peripherals. 88 VDD25 - Power 89 PB7 I/O TTL GPIO port B bit 7 TRST I TTL JTAG TRSTn 90 PB6 I/O TTL GPIO port B bit 6 C0+ I Analog Analog comparator 0 positive input C0o O TTL Analog comparator 0 output 522 November 30, 2007 Preliminary Signal Tables Pin Number Pin Name Pin Type Buffer Type Description 91 PB5 I/O TTL GPIO port B bit 5 C1- I Analog Analog comparator 1 negative input 92 PB4 I/O TTL GPIO port B bit 4 C0- I Analog Analog comparator 0 negative input 93 VDD - Power Positive supply for I/O and some logic. 94 GND - Power Ground reference for logic and I/O pins. 95 PD4 I/O TTL GPIO port D bit 4 CCP0 I/O TTL Capture/Compare/PWM 0 96 PD5 I/O TTL GPIO port D bit 5 CCP2 I/O TTL Capture/Compare/PWM 2 The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. 97 GNDA - Power The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. 98 VDDA - Power 99 PD6 I/O TTL GPIO port D bit 6 Fault I TTL PWM Fault 100 PD7 I/O TTL GPIO port D bit 7 IDX0 I TTL QEI module 0 index Table 21-2. Signals by Signal Name Pin Name Pin Number Pin Type Buffer Type Description ADC0 1 I Analog Analog-to-digital converter input 0. ADC1 2 I Analog Analog-to-digital converter input 1. ADC2 5 I Analog Analog-to-digital converter input 2. C0+ 90 I Analog Analog comparator 0 positive input C0- 92 I Analog Analog comparator 0 negative input C0o 90 O TTL Analog comparator 0 output C1+ 24 I Analog Analog comparator positive input C1- 91 I Analog Analog comparator 1 negative input C1o 24 O TTL Analog comparator 1 output C2+ 23 I Analog Analog comparator positive input C2- 22 I Analog Analog comparator 2 negative input CCP0 95 I/O TTL Capture/Compare/PWM 0 CCP1 34 I/O TTL Capture/Compare/PWM 1 CCP2 96 I/O TTL Capture/Compare/PWM 2 CCP3 72 I/O TTL Capture/Compare/PWM 3 CPU Mode bit 0. Input must be set to logic 0 (grounded); other encodings reserved. CMOD0 65 I/O TTL November 30, 2007 523 Preliminary LM3S6952 Microcontroller Pin Name Pin Number Pin Type Buffer Type Description CPU Mode bit 1. Input must be set to logic 0 (grounded); other encodings reserved. CMOD1 76 I/O TTL Fault 99 I TTL PWM Fault GND 9 - Power Ground reference for logic and I/O pins. GND 15 - Power Ground reference for logic and I/O pins. GND 21 - Power Ground reference for logic and I/O pins. GND 33 - Power Ground reference for logic and I/O pins. GND 39 - Power Ground reference for logic and I/O pins. GND 45 - Power Ground reference for logic and I/O pins. GND 54 - Power Ground reference for logic and I/O pins. GND 57 - Power Ground reference for logic and I/O pins. GND 63 - Power Ground reference for logic and I/O pins. GND 69 - Power Ground reference for logic and I/O pins. GND 82 - Power Ground reference for logic and I/O pins. GND 87 - Power Ground reference for logic and I/O pins. GND 94 - Power Ground reference for logic and I/O pins. The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. GNDA 4 - Power The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. GNDA 97 - Power GNDPHY 41 I TTL GND of the Ethernet PHY GNDPHY 42 I TTL GND of the Ethernet PHY GNDPHY 85 I TTL GND of the Ethernet PHY GNDPHY 86 I TTL GND of the Ethernet PHY An output that indicates the processor is in hibernate mode. HIB 51 O TTL I2C0SCL 70 I/O OD I2C module 0 clock I2C0SDA 71 I/O OD I2C module 0 data IDX0 100 I TTL QEI module 0 index Low drop-out regulator output voltage. This pin requires an external capacitor between the pin and GND of 1 μF or greater. When the on-chip LDO is used to provide power to the logic, the LDO pin must also be connected to the VDD25 pins at the board level in addition to the decoupling capacitor(s). LDO 7 - Power LED0 59 O TTL MII LED 0 LED1 60 O TTL MII LED 1 MDIO 58 I/O TTL MDIO of the Ethernet PHY Main oscillator crystal input or an external clock reference input. OSC0 48 I Analog OSC1 49 I Analog Main oscillator crystal output. 524 November 30, 2007 Preliminary Signal Tables Pin Name Pin Number Pin Type Buffer Type Description PA0 26 I/O TTL GPIO port A bit 0 PA1 27 I/O TTL GPIO port A bit 1 PA2 28 I/O TTL GPIO port A bit 2 PA3 29 I/O TTL GPIO port A bit 3 PA4 30 I/O TTL GPIO port A bit 4 PA5 31 I/O TTL GPIO port A bit 5 PA6 34 I/O TTL GPIO port A bit 6 PA7 35 I/O TTL GPIO port A bit 7 PB0 66 I/O TTL GPIO port B bit 0 PB1 67 I/O TTL GPIO port B bit 1 PB2 70 I/O TTL GPIO port B bit 2 PB3 71 I/O TTL GPIO port B bit 3 PB4 92 I/O TTL GPIO port B bit 4 PB5 91 I/O TTL GPIO port B bit 5 PB6 90 I/O TTL GPIO port B bit 6 PB7 89 I/O TTL GPIO port B bit 7 PC0 80 I/O TTL GPIO port C bit 0 PC1 79 I/O TTL GPIO port C bit 1 PC2 78 I/O TTL GPIO port C bit 2 PC3 77 I/O TTL GPIO port C bit 3 PC4 25 I/O TTL GPIO port C bit 4 PC5 24 I/O TTL GPIO port C bit 5 PC6 23 I/O TTL GPIO port C bit 6 PC7 22 I/O TTL GPIO port C bit 7 PD0 10 I/O TTL GPIO port D bit 0 PD1 11 I/O TTL GPIO port D bit 1 PD2 12 I/O TTL GPIO port D bit 2 PD3 13 I/O TTL GPIO port D bit 3 PD4 95 I/O TTL GPIO port D bit 4 PD5 96 I/O TTL GPIO port D bit 5 PD6 99 I/O TTL GPIO port D bit 6 PD7 100 I/O TTL GPIO port D bit 7 PE0 72 I/O TTL GPIO port E bit 0 PE1 73 I/O TTL GPIO port E bit 1 PE2 74 I/O TTL GPIO port E bit 2 PE3 75 I/O TTL GPIO port E bit 3 PE4 6 I/O TTL GPIO port E bit 4 PF0 47 I/O TTL GPIO port F bit 0 PF1 61 I/O TTL GPIO port F bit 1 PF2 60 I/O TTL GPIO port F bit 2 PF3 59 I/O TTL GPIO port F bit 3 PG0 19 I/O TTL GPIO port G bit 0 November 30, 2007 525 Preliminary LM3S6952 Microcontroller Pin Name Pin Number Pin Type Buffer Type Description PG1 18 I/O TTL GPIO port G bit 1 PhA0 25 I TTL QEI module 0 Phase A PhB0 47 I TTL QEI module 1 Phase B PWM0 10 O TTL PWM 0 PWM1 11 O TTL PWM 1 PWM2 66 O TTL PWM 2 PWM3 67 O TTL PWM 3 RST 64 I TTL System reset input. RXIN 37 I Analog RXIN of the Ethernet PHY RXIP 40 I Analog RXIP of the Ethernet PHY SSI0Clk 28 I/O TTL SSI module 0 clock SSI0Fss 29 I/O TTL SSI module 0 frame SSI0Rx 30 I TTL SSI module 0 receive SSI0Tx 31 O TTL SSI module 0 transmit SWCLK 80 I TTL JTAG/SWD CLK SWDIO 79 I/O TTL JTAG TMS and SWDIO SWO 77 O TTL JTAG TDO and SWO TCK 80 I TTL JTAG/SWD CLK TDI 78 I TTL JTAG TDI TDO 77 O TTL JTAG TDO and SWO TMS 79 I/O TTL JTAG TMS and SWDIO TRST 89 I TTL JTAG TRSTn TXON 46 O Analog TXON of the Ethernet PHY TXOP 43 O Analog TXOP of the Ethernet PHY UART module 0 receive. When in IrDA mode, this signal has IrDA modulation. U0Rx 26 I TTL UART module 0 transmit. When in IrDA mode, this signal has IrDA modulation. U0Tx 27 O TTL UART module 1 receive. When in IrDA mode, this signal has IrDA modulation. U1Rx 12 I TTL UART module 1 transmit. When in IrDA mode, this signal has IrDA modulation. U1Tx 13 O TTL UART 2 Receive. When in IrDA mode, this signal has IrDA modulation. U2Rx 19 I TTL UART 2 Transmit. When in IrDA mode, this signal has IrDA modulation. U2Tx 18 O TTL Power source for the Hibernation Module. It is normally connected to the positive terminal of a battery and serves as the battery backup/Hibernation Module power-source supply. VBAT 55 - Power VCCPHY 36 I TTL VCC of the Ethernet PHY VCCPHY 83 I TTL VCC of the Ethernet PHY VCCPHY 84 I TTL VCC of the Ethernet PHY VDD 8 - Power Positive supply for I/O and some logic. VDD 20 - Power Positive supply for I/O and some logic. 526 November 30, 2007 Preliminary Signal Tables Pin Name Pin Number Pin Type Buffer Type Description VDD 32 - Power Positive supply for I/O and some logic. VDD 44 - Power Positive supply for I/O and some logic. VDD 56 - Power Positive supply for I/O and some logic. VDD 68 - Power Positive supply for I/O and some logic. VDD 81 - Power Positive supply for I/O and some logic. VDD 93 - Power Positive supply for I/O and some logic. Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 14 - Power Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 38 - Power Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 62 - Power Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 88 - Power The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. VDDA 3 - Power The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. VDDA 98 - Power An external input that brings the processor out of hibernate mode when asserted. WAKE 50 I OD Hibernation Module oscillator crystal input or an external clock reference input. Note that this is either a 4.19-MHz crystal or a 32.768-kHz oscillator for the Hibernation Module RTC. See the CLKSEL bit in the HIBCTL register. XOSC0 52 I Analog XOSC1 53 I Analog Hibernation Module oscillator crystal output. XTALNPHY 17 I TTL XTALN of the Ethernet PHY XTALPPHY 16 O TTL XTALP of the Ethernet PHY Table 21-3. Signals by Function, Except for GPIO Buffer Description Type Pin Pin Type Number Function Pin Name ADC ADC0 1 I Analog Analog-to-digital converter input 0. ADC1 2 I Analog Analog-to-digital converter input 1. ADC2 5 I Analog Analog-to-digital converter input 2. November 30, 2007 527 Preliminary LM3S6952 Microcontroller Buffer Description Type Pin Pin Type Number Function Pin Name Analog C0+ 90 I Analog Analog comparator 0 positive input Comparators C0- 92 I Analog Analog comparator 0 negative input C0o 90 O TTL Analog comparator 0 output C1+ 24 I Analog Analog comparator positive input C1- 91 I Analog Analog comparator 1 negative input C1o 24 O TTL Analog comparator 1 output C2+ 23 I Analog Analog comparator positive input C2- 22 I Analog Analog comparator 2 negative input Ethernet PHY GNDPHY 41 I TTL GND of the Ethernet PHY GNDPHY 42 I TTL GND of the Ethernet PHY GNDPHY 85 I TTL GND of the Ethernet PHY GNDPHY 86 I TTL GND of the Ethernet PHY LED0 59 O TTL MII LED 0 LED1 60 O TTL MII LED 1 MDIO 58 I/O TTL MDIO of the Ethernet PHY RXIN 37 I Analog RXIN of the Ethernet PHY RXIP 40 I Analog RXIP of the Ethernet PHY TXON 46 O Analog TXON of the Ethernet PHY TXOP 43 O Analog TXOP of the Ethernet PHY VCCPHY 36 I TTL VCC of the Ethernet PHY VCCPHY 83 I TTL VCC of the Ethernet PHY VCCPHY 84 I TTL VCC of the Ethernet PHY XTALNPHY 17 I TTL XTALN of the Ethernet PHY XTALPPHY 16 O TTL XTALP of the Ethernet PHY General-Purpose CCP0 95 I/O TTL Capture/Compare/PWM 0 Timers CCP1 34 I/O TTL Capture/Compare/PWM 1 CCP2 96 I/O TTL Capture/Compare/PWM 2 CCP3 72 I/O TTL Capture/Compare/PWM 3 I2C I2C0SCL 70 I/O OD I2C module 0 clock I2C0SDA 71 I/O OD I2C module 0 data JTAG/SWD/SWO SWCLK 80 I TTL JTAG/SWD CLK SWDIO 79 I/O TTL JTAG TMS and SWDIO SWO 77 O TTL JTAG TDO and SWO TCK 80 I TTL JTAG/SWD CLK TDI 78 I TTL JTAG TDI TDO 77 O TTL JTAG TDO and SWO TMS 79 I/O TTL JTAG TMS and SWDIO PWM Fault 99 I TTL PWM Fault PWM0 10 O TTL PWM 0 PWM1 11 O TTL PWM 1 PWM2 66 O TTL PWM 2 PWM3 67 O TTL PWM 3 528 November 30, 2007 Preliminary Signal Tables Buffer Description Type Pin Pin Type Number Function Pin Name Power GND 9 - Power Ground reference for logic and I/O pins. GND 15 - Power Ground reference for logic and I/O pins. GND 21 - Power Ground reference for logic and I/O pins. GND 33 - Power Ground reference for logic and I/O pins. GND 39 - Power Ground reference for logic and I/O pins. GND 45 - Power Ground reference for logic and I/O pins. GND 54 - Power Ground reference for logic and I/O pins. GND 57 - Power Ground reference for logic and I/O pins. GND 63 - Power Ground reference for logic and I/O pins. GND 69 - Power Ground reference for logic and I/O pins. GND 82 - Power Ground reference for logic and I/O pins. GND 87 - Power Ground reference for logic and I/O pins. GND 94 - Power Ground reference for logic and I/O pins. The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. GNDA 4 - Power The ground reference for the analog circuits (ADC, Analog Comparators, etc.). These are separated from GND to minimize the electrical noise contained on VDD from affecting the analog functions. GNDA 97 - Power An output that indicates the processor is in hibernate mode. HIB 51 O TTL Low drop-out regulator output voltage. This pin requires an external capacitor between the pin and GND of 1 μF or greater. When the on-chip LDO is used to provide power to the logic, the LDO pin must also be connected to the VDD25 pins at the board level in addition to the decoupling capacitor(s). LDO 7 - Power Power source for the Hibernation Module. It is normally connected to the positive terminal of a battery and serves as the battery backup/Hibernation Module power-source supply. VBAT 55 - Power VDD 8 - Power Positive supply for I/O and some logic. VDD 20 - Power Positive supply for I/O and some logic. VDD 32 - Power Positive supply for I/O and some logic. VDD 44 - Power Positive supply for I/O and some logic. VDD 56 - Power Positive supply for I/O and some logic. VDD 68 - Power Positive supply for I/O and some logic. VDD 81 - Power Positive supply for I/O and some logic. VDD 93 - Power Positive supply for I/O and some logic. Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 14 - Power Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 38 - Power Positive supply for most of the logic function, including the processor core and most peripherals. VDD25 62 - Power November 30, 2007 529 Preliminary LM3S6952 Microcontroller Buffer Description Type Pin Pin Type Number Function Pin Name VDD25 Positive supply for most of the logic function, including the processor core and most peripherals. 88 - Power The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. VDDA 3 - Power The positive supply (3.3 V) for the analog circuits (ADC, Analog Comparators, etc.). These are separated from VDD to minimize the electrical noise contained on VDD from affecting the analog functions. VDDA 98 - Power An external input that brings the processor out of hibernate mode when asserted. WAKE 50 I OD QEI IDX0 100 I TTL QEI module 0 index PhA0 25 I TTL QEI module 0 Phase A PhB0 47 I TTL QEI module 1 Phase B SSI SSI0Clk 28 I/O TTL SSI module 0 clock SSI0Fss 29 I/O TTL SSI module 0 frame SSI0Rx 30 I TTL SSI module 0 receive SSI0Tx 31 O TTL SSI module 0 transmit CPU Mode bit 0. Input must be set to logic 0 (grounded); other encodings reserved. System Control & CMOD0 65 I/O TTL Clocks CPU Mode bit 1. Input must be set to logic 0 (grounded); other encodings reserved. CMOD1 76 I/O TTL Main oscillator crystal input or an external clock reference input. OSC0 48 I Analog OSC1 49 I Analog Main oscillator crystal output. RST 64 I TTL System reset input. TRST 89 I TTL JTAG TRSTn Hibernation Module oscillator crystal input or an external clock reference input. Note that this is either a 4.19-MHz crystal or a 32.768-kHz oscillator for the Hibernation Module RTC. See the CLKSEL bit in the HIBCTL register. XOSC0 52 I Analog XOSC1 53 I Analog Hibernation Module oscillator crystal output. UART module 0 receive. When in IrDA mode, this signal has IrDA modulation. UART U0Rx 26 I TTL UART module 0 transmit. When in IrDA mode, this signal has IrDA modulation. U0Tx 27 O TTL UART module 1 receive. When in IrDA mode, this signal has IrDA modulation. U1Rx 12 I TTL UART module 1 transmit. When in IrDA mode, this signal has IrDA modulation. U1Tx 13 O TTL UART 2 Receive. When in IrDA mode, this signal has IrDA modulation. U2Rx 19 I TTL UART 2 Transmit. When in IrDA mode, this signal has IrDA modulation. U2Tx 18 O TTL 530 November 30, 2007 Preliminary Signal Tables Table 21-4. GPIO Pins and Alternate Functions GPIO Pin Pin Number Multiplexed Function Multiplexed Function PA0 26 U0Rx PA1 27 U0Tx PA2 28 SSI0Clk PA3 29 SSI0Fss PA4 30 SSI0Rx PA5 31 SSI0Tx PA6 34 CCP1 PA7 35 PB0 66 PWM2 PB1 67 PWM3 PB2 70 I2C0SCL PB3 71 I2C0SDA PB4 92 C0- PB5 91 C1- PB6 90 C0+ C0o PB7 89 TRST PC0 80 TCK SWCLK PC1 79 TMS SWDIO PC2 78 TDI PC3 77 TDO SWO PC4 25 PhA0 PC5 24 C1+ C1o PC6 23 C2+ PC7 22 C2- PD0 10 PWM0 PD1 11 PWM1 PD2 12 U1Rx PD3 13 U1Tx PD4 95 CCP0 PD5 96 CCP2 PD6 99 Fault PD7 100 IDX0 PE0 72 CCP3 PE1 73 PE2 74 PE3 75 PE4 6 PF0 47 PhB0 PF1 61 PF2 60 LED1 PF3 59 LED0 November 30, 2007 531 Preliminary LM3S6952 Microcontroller GPIO Pin Pin Number Multiplexed Function Multiplexed Function PG0 19 U2Rx PG1 18 U2Tx 532 November 30, 2007 Preliminary Signal Tables 22 Operating Characteristics Table 22-1. Temperature Characteristics Characteristic Symbol Value Unit Operating temperature rangea TA -40 to +85 °C a. Maximum storage temperature is 150°C. Table 22-2. Thermal Characteristics Characteristic Symbol Value Unit Thermal resistance (junction to ambient)a ΘJA 55.3 °C/W Average junction temperatureb TJ TA + (PAVG • ΘJA) °C a. Junction to ambient thermal resistance θJA numbers are determined by a package simulator. b. Power dissipation is a function of temperature. November 30, 2007 533 Preliminary LM3S6952 Microcontroller 23 Electrical Characteristics 23.1 DC Characteristics 23.1.1 Maximum Ratings The maximum ratings are the limits to which the device can be subjected without permanently damaging the device. Note: The device is not guaranteed to operate properly at the maximum ratings. Table 23-1. Maximum Ratings Characteristic Symbol Value Unit a Min Max I/O supply voltage (VDD) VDD 0 4 V Core supply voltage (VDD25) VDD25 0 4 V Analog supply voltage (VDDA) VDDA 0 4 V Battery supply voltage (VBAT) VBAT 0 4 V Ethernet PHY supply voltage (VCCPHY) VCCPHY 0 4 V Input voltage VIN -0.3 5.5 V Maximum current per output pins I - 25 mA a. Voltages are measured with respect to GND. Important: This device contains circuitry to protect the inputs against damage due to high-static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused inputs are connected to an appropriate logic voltage level (for example, either GND or VDD). 23.1.2 Recommended DC Operating Conditions Table 23-2. Recommended DC Operating Conditions Parameter Parameter Name Min Nom Max Unit VDD I/O supply voltage 3.0 3.3 3.6 V VDD25 Core supply voltage 2.25 2.5 2.75 V VDDA Analog supply voltage 3.0 3.3 3.6 V VBAT Battery supply voltage 2.3 3.0 3.6 V VCCPHY Ethernet PHY supply voltage 3.0 3.3 3.6 V VIH High-level input voltage 2.0 - 5.0 V VIL Low-level input voltage -0.3 - 1.3 V VSIH High-level input voltage for Schmitt trigger inputs 0.8 * VDD - VDD V VSIL Low-level input voltage for Schmitt trigger inputs 0 - 0.2 * VDD V VOH High-level output voltage 2.4 - - V VOL Low-level output voltage - - 0.4 V 534 November 30, 2007 Preliminary Electrical Characteristics Parameter Parameter Name Min Nom Max Unit IOH High-level source current, VOH=2.4 V 2-mA Drive 2.0 - - mA 4-mA Drive 4.0 - - mA 8-mA Drive 8.0 - - mA IOL Low-level sink current, VOL=0.4 V 2-mA Drive 2.0 - - mA 4-mA Drive 4.0 - - mA 8-mA Drive 8.0 - - mA 23.1.3 On-Chip Low Drop-Out (LDO) Regulator Characteristics Table 23-3. LDO Regulator Characteristics Parameter Parameter Name Min Nom Max Unit VLDOOUT Programmable internal (logic) power supply output value 2.25 2.5 2.75 V Output voltage accuracy - 2% - % tPON Power-on time - - 100 μs tON Time on - - 200 μs tOFF Time off - - 100 μs VSTEP Step programming incremental voltage - 50 - mV CLDO External filter capacitor size for internal power supply 1.0 - 3.0 μF 23.1.4 Power Specifications The power measurements specified in the tables that follow are run on the core processor using SRAM with the following specifications (except as noted): ■ VDD = 3.3 V ■ VDD25 = 2.50 V ■ VBAT = 3.0 V ■ VDDA = 3.3 V ■ VDDPHY = 3.3 V ■ Temperature = 25°C ■ Clock Source (MOSC) =3.579545 MHz Crystal Oscillator ■ Main oscillator (MOSC) = enabled ■ Internal oscillator (IOSC) = disabled November 30, 2007 535 Preliminary LM3S6952 Microcontroller Table 23-4. Detailed Power Specifications 3.3 V VDD, VDDA, 2.5 V VDD25 3.0 V VBAT Unit VDDPHY Parameter Conditions Name Parameter Nom Max Nom Max Nom Max VDD25 = 2.50 V 48 pendinga 108 pendinga 0 pendinga mA Code= while(1){} executed in Flash Peripherals = All ON System Clock = 50 MHz (with PLL) Run mode 1 (Flash loop) IDD_RUN VDD25 = 2.50 V 5 pendinga 52 pendinga 0 pendinga mA Code= while(1){} executed in Flash Peripherals = All OFF System Clock = 50 MHz (with PLL) Run mode 2 (Flash loop) VDD25 = 2.50 V 48 pendinga 100 pendinga 0 pendinga mA Code= while(1){} executed in SRAM Peripherals = All ON System Clock = 50 MHz (with PLL) Run mode 1 (SRAM loop) VDD25 = 2.50 V 5 pendinga 45 pendinga 0 pendinga mA Code= while(1){} executed in SRAM Peripherals = All OFF System Clock = 50 MHz (with PLL) Run mode 2 (SRAM loop) VDD25 = 2.50 V 5 pendinga 16 pendinga 0 pendinga mA Peripherals = All OFF System Clock = 50 MHz (with PLL) IDD_SLEEP Sleep mode LDO = 2.25 V 4.6 pendinga 0.21 pendinga 0 pendinga mA Peripherals = All OFF System Clock = IOSC30KHZ/64 Deep-Sleep mode IDD_DEEPSLEEP VBAT = 3.0 V 0 pendinga 0 pendinga 16 pendinga μA VDD = 0 V VDD25 = 0 V VDDA = 0 V VDDPHY = 0 V Peripherals = All OFF System Clock = OFF Hibernate Module = 32 kHz Hibernate mode IDD_HIBERNATE a. Pending characterization completion. 536 November 30, 2007 Preliminary Electrical Characteristics 23.1.5 Flash Memory Characteristics Table 23-5. Flash Memory Characteristics Parameter Parameter Name Min Nom Max Unit PECYC Number of guaranteed program/erase cycles before failurea 10,000 100,000 - cycles TRET Data retention at average operating temperature of 85˚C 10 - - years TPROG Word program time 20 - - μs TERASE Page erase time 20 - - ms TME Mass erase time 200 - - ms a. A program/erase cycle is defined as switching the bits from 1-> 0 -> 1. 23.2 AC Characteristics 23.2.1 Load Conditions Unless otherwise specified, the following conditions are true for all timing measurements. Timing measurements are for 4-mA drive strength. Figure 23-1. Load Conditions CL = 50 pF GND pin 23.2.2 Clocks Table 23-6. Phase Locked Loop (PLL) Characteristics Parameter Parameter Name Min Nom Max Unit fref_crystal Crystal referencea 3.579545 - 8.192 MHz fref_ext External clock referencea 3.579545 - 8.192 MHz fpll PLL frequencyb - 400 - MHz TREADY PLL lock time - - 0.5 ms a. The exact value is determined by the crystal value programmed into the XTAL field of the Run-Mode Clock Configuration (RCC) register. b. PLL frequency is automatically calculated by the hardware based on the XTAL field of the RCC register. Table 23-7. Clock Characteristics Parameter Parameter Name Min Nom Max Unit fIOSC Internal 12 MHz oscillator frequency 8.4 12 15.6 MHz fIOSC30KHZ Internal 30 KHz oscillator frequency 21 30 39 KHz fXOSC Hibernation module oscillator frequency - 4.194304 - MHz fXOSC_XTAL Crystal reference for hibernation oscillator - 4.194304 - MHz fXOSC_EXT External clock reference for hibernation module - 32.768 - KHz November 30, 2007 537 Preliminary LM3S6952 Microcontroller Parameter Parameter Name Min Nom Max Unit fMOSC Main oscillator frequency 1 - 8 MHz tMOSC_per Main oscillator period 125 - 1000 ns Crystal reference using the main oscillator (PLL in BYPASS mode) 1 - 8 MHz a fref_crystal_bypass fref_ext_bypass External clock reference (PLL in BYPASS mode)a 0 - 50 MHz fsystem_clock System clock 0 - 50 MHz a. The ADC must be clocked from the PLL or directly from a 14-MHz to 18-MHz clock source to operate properly. Table 23-8. Crystal Characteristics Parameter Name Value Units Frequency 8 6 4 3.5 MHz Frequency tolerance ±50 ±50 ±50 ±50 ppm Aging ±5 ±5 ±5 ±5 ppm/yr Oscillation mode Parallel Parallel Parallel Parallel Temperature stability (0 - 85 °C) ±25 ±25 ±25 ±25 ppm Motional capacitance (typ) 27.8 37.0 55.6 63.5 pF Motional inductance (typ) 14.3 19.1 28.6 32.7 mH Equivalent series resistance (max) 120 160 200 220 Ω Shunt capacitance (max) 10 10 10 10 pF Load capacitance (typ) 16 16 16 16 pF Drive level (typ) 100 100 100 100 μW 23.2.3 Analog-to-Digital Converter Table 23-9. ADC Characteristics Parameter Parameter Name Min Nom Max Unit VADCIN Maximum single-ended, full-scale analog input voltage - - 3.0 V Minimum single-ended, full-scale analog input voltage - - 0 V Maximum differential, full-scale analog input voltage - - 1.5 V Minimum differential, full-scale analog input voltage - - -1.5 V CADCIN Equivalent input capacitance - 1 - pF N Resolution - 10 - bits fADC ADC internal clock frequency 7 8 9 MHz tADCCONV Conversion time - - 16 tADCcyclesa f ADCCONV Conversion rate 438 500 563 k samples/s INL Integral nonlinearity - - ±1 LSB DNL Differential nonlinearity - - ±1 LSB OFF Offset - - ±1 LSB GAIN Gain - - ±1 LSB a. tADC= 1/fADC clock 538 November 30, 2007 Preliminary Electrical Characteristics 23.2.4 Analog Comparator Table 23-10. Analog Comparator Characteristics Parameter Parameter Name Min Nom Max Unit VOS Input offset voltage - ±10 ±25 mV VCM Input common mode voltage range 0 - VDD-1.5 V CMRR Common mode rejection ratio 50 - - dB TRT Response time - - 1 μs TMC Comparator mode change to Output Valid - - 10 μs Table 23-11. Analog Comparator Voltage Reference Characteristics Parameter Parameter Name Min Nom Max Unit RHR Resolution high range - VDD/32 - LSB RLR Resolution low range - VDD/24 - LSB AHR Absolute accuracy high range - - ±1/2 LSB ALR Absolute accuracy low range - - ±1/4 LSB 23.2.5 I2C Table 23-12. I2C Characteristics Parameter No. Parameter Parameter Name Min Nom Max Unit I1a tSCH Start condition hold time 36 - - system clocks I2a tLP Clock Low period 36 - - system clocks I3b tSRT I2CSCL/I2CSDA rise time (VIL =0.5 V to V IH =2.4 V) - - (see note b) ns I4a tDH Data hold time 2 - - system clocks I5c tSFT I2CSCL/I2CSDA fall time (VIH =2.4 V to V IL =0.5 V) - 9 10 ns I6a tHT Clock High time 24 - - system clocks I7a tDS Data setup time 18 - - system clocks Start condition setup time (for repeated start condition 36 - - system clocks only) I8a tSCSR I9a tSCS Stop condition setup time 24 - - system clocks a. Values depend on the value programmed into the TPR bit in the I2C Master Timer Period (I2CMTPR) register; a TPR programmed for the maximum I2CSCL frequency (TPR=0x2) results in a minimum output timing as shown in the table above. The I 2C interface is designed to scale the actual data transition time to move it to the middle of the I2CSCL Low period. The actual position is affected by the value programmed into the TPR; however, the numbers given in the above values are minimum values. b. Because I2CSCL and I2CSDA are open-drain-type outputs, which the controller can only actively drive Low, the time I2CSCL or I2CSDA takes to reach a high level depends on external signal capacitance and pull-up resistor values. c. Specified at a nominal 50 pF load. November 30, 2007 539 Preliminary LM3S6952 Microcontroller Figure 23-2. I2C Timing I2CSCL I2CSDA I1 I2 I4 I6 I7 I8 I5 I3 I9 23.2.6 Ethernet Controller Table 23-13. 100BASE-TX Transmitter Characteristicsa Parameter Name Min Nom Max Unit Peak output amplitude 950 - 1050 mVpk Output amplitude symmetry 0.98 - 1.02 mVpk Output overshoot - - 5 % Rise/Fall time 3 - 5 ns Rise/Fall time imbalance - - 500 ps Duty cycle distortion - - - ps Jitter - - 1.4 ns a. Measured at the line side of the transformer. Table 23-14. 100BASE-TX Transmitter Characteristics (informative)a Parameter Name Min Nom Max Unit Return loss 16 - - dB Open-circuit inductance 350 - - μs a. The specifications in this table are included for information only. They are mainly a function of the external transformer and termination resistors used for measurements. Table 23-15. 100BASE-TX Receiver Characteristics Parameter Name Min Nom Max Unit Signal detect assertion threshold 600 700 mVppd Signal detect de-assertion threshold 350 425 - mVppd Differential input resistance 20 - - kΩ Jitter tolerance (pk-pk) 4 - - ns Baseline wander tracking -75 - +75 % Signal detect assertion time - - 1000 μs Signal detect de-assertion time - - 4 μs Table 23-16. 10BASE-T Transmitter Characteristicsa Parameter Name Min Nom Max Unit Peak differential output signal 2.2 - 2.8 V Harmonic content 27 - - dB Link pulse width - 100 - ns 540 November 30, 2007 Preliminary Electrical Characteristics Parameter Name Min Nom Max Unit 300 - ns 350 Start-of-idle pulse width - a. The Manchester-encoded data pulses, the link pulse and the start-of-idle pulse are tested against the templates and using the procedures found in Clause 14 of IEEE 802.3. Table 23-17. 10BASE-T Transmitter Characteristics (informative)a Parameter Name Min Nom Max Unit Output return loss 15 - - dB Output impedance balance 29-17log(f/10) - - dB Peak common-mode output voltage - - 50 mV Common-mode rejection - - 100 mV Common-mode rejection jitter - - 1 ns a. The specifications in this table are included for information only. They are mainly a function of the external transformer and termination resistors used for measurements. Table 23-18. 10BASE-T Receiver Characteristics Parameter Name Min Nom Max Unit DLL phase acquisition time - 10 - BT Jitter tolerance (pk-pk) 30 - - ns Input squelched threshold 500 600 700 mVppd Input unsquelched threshold 275 350 425 mVppd Differential input resistance - 20 - kΩ Bit error ratio - 10-10 - - Common-mode rejection 25 - - V Table 23-19. Isolation Transformersa Name Value Condition Turns ratio 1 CT : 1 CT +/- 5% Open-circuit inductance 350 uH (min) @ 10 mV, 10 kHz Leakage inductance 0.40 uH (max) @ 1 MHz (min) Inter-winding capacitance 25 pF (max) DC resistance 0.9 Ohm (max) Insertion loss 0.4 dB (typ) 0-65 MHz HIPOT 1500 Vrms a. Two simple 1:1 isolation transformers are required at the line interface. Transformers with integrated common-mode chokes are recommended for exceeding FCC requirements. This table gives the recommended line transformer characteristics. Note: The 100Base-TX amplitude specifications assume a transformer loss of 0.4 dB. For the transmit line transformer with higher insertion losses, up to 1.2 dB of insertion loss can be compensated by selecting the appropriate setting in the Transmit Amplitude Selection (TXO) bits in the MR19 register. November 30, 2007 541 Preliminary LM3S6952 Microcontroller Table 23-20. Ethernet Reference Crystala Name Value Condition Frequency 25.00000 MHz Load capacitanceb 4c pF Frequency tolerance ±50 PPM Aging ±2 PPM/yr Temperature stability (0° to 70°) ±5 PPM Oscillation mode Parallel resonance, fundamental mode Parameters at 25° C ±2° C; Drive level = 0.5 mW Drive level (typ) 50-100 μW Shunt capacitance (max) 10 pF Motional capacitance (min) 10 fF Serious resistance (max) 60 Ω Spurious response (max) > 5 dB below main within 500 kHz a. If the internal crystal oscillator is used, select a crystal with the following characteristics. b. Equivalent differential capacitance across XTLP/XTLN. c. If crystal with a larger load is used, external shunt capacitors to ground should be added to make up the equivalent capacitance difference. Figure 23-3. External XTLP Oscillator Characteristics Tclkper Tr Tclkhi Tclklo Tf Table 23-21. External XTLP Oscillator Characteristics Parameter Name Symbol Min Nom Max Unit XTLN Input Low Voltage XTLNILV - - 0.8 - XTLP Frequencya XTLPf - 25.0 - - XTLP Periodb Tclkper - 40 - - 60 % 60 40 - 40 XTLPDC XTLP Duty Cycle Rise/Fall Time Tr , Tf - - 4.0 ns Absolute Jitter - - 0.1 ns a. IEEE 802.3 frequency tolerance ±50 ppm. 542 November 30, 2007 Preliminary Electrical Characteristics b. IEEE 802.3 frequency tolerance ±50 ppm. 23.2.7 Hibernation Module The Hibernation Module requires special system implementation considerations since it is intended to power-down all other sections of its host device. The system power-supply distribution and interfaces of the system must be driven to 0 VDC or powered down with the same regulator controlled by HIB. The regulators controlled by HIB are expected to have a settling time of 250 μs or less. Table 23-22. Hibernation Module Characteristics Parameter No Parameter Parameter Name Min Nom Max Unit H1 tHIB_LOW Internal 32.768 KHz clock reference rising edge to /HIB asserted - 200 - μs H2 tHIB_HIGH Internal 32.768 KHz clock reference rising edge to /HIB deasserted - 30 - μs H3 tWAKE_ASSERT /WAKE assertion time 62 - - μs H4 tWAKETOHIB /WAKE assert to /HIB desassert 62 - 124 μs H5 tXOSC_SETTLE XOSC settling timea 20 - - ms H6 tHIB_REG_WRITE Time for a write to non-volatile registers in HIB module to complete 92 - - μs H7 tHIB_TO_VDD HIB deassert to VDD and VDD25 at minimum operational level - - 250 μs a. This parameter is highly sensitive to PCB layout and trace lengths, which may make this parameter time longer. Care must be taken in PCB design to minimize trace lengths and RLC (resistance, inductance, capacitance). Figure 23-4. Hibernation Module Timing 32.768 KHz (internal) /HIB H4 H1 /WAKE H2 H3 23.2.8 Synchronous Serial Interface (SSI) Table 23-23. SSI Characteristics Parameter No. Parameter Parameter Name Min Nom Max Unit S1 tclk_per SSIClk cycle time 2 - 65024 system clocks S2 tclk_high SSIClk high time - 1/2 - t clk_per S3 tclk_low SSIClk low time - 1/2 - t clk_per S4 tclkrf SSIClk rise/fall time - 7.4 26 ns S5 tDMd Data from master valid delay time 0 - 20 ns S6 tDMs Data from master setup time 20 - - ns S7 tDMh Data from master hold time 40 - - ns November 30, 2007 543 Preliminary LM3S6952 Microcontroller Parameter No. Parameter Parameter Name Min Nom Max Unit S8 tDSs Data from slave setup time 20 - - ns S9 tDSh Data from slave hold time 40 - - ns Figure 23-5. SSI Timing for TI Frame Format (FRF=01), Single Transfer Timing Measurement SSIClk SSIFss SSITx SSIRx MSB LSB S2 S3 S1 S4 4 to 16 bits Figure 23-6. SSI Timing for MICROWIRE Frame Format (FRF=10), Single Transfer 0 SSIClk SSIFss SSITx SSIRx MSB LSB MSB LSB S2 S3 S1 8-bit control 4 to 16 bits output data 544 November 30, 2007 Preliminary Electrical Characteristics Figure 23-7. SSI Timing for SPI Frame Format (FRF=00), with SPH=1 SSIClk (SPO=1) SSITx (master) SSIRx (slave) LSB SSIClk (SPO=0) S2 S1 S4 SSIFss LSB S3 MSB S5 S6 S7 S8 S9 MSB 23.2.9 JTAG and Boundary Scan Table 23-24. JTAG Characteristics Parameter No. Parameter Parameter Name Min Nom Max Unit J1 fTCK TCK operational clock frequency 0 - 10 MHz J2 tTCK TCK operational clock period 100 - - ns J3 tTCK_LOW TCK clock Low time - tTCK - ns J4 tTCK_HIGH TCK clock High time - tTCK - ns J5 tTCK_R TCK rise time 0 - 10 ns J6 tTCK_F TCK fall time 0 - 10 ns J7 tTMS_SU TMS setup time to TCK rise 20 - - ns J8 tTMS_HLD TMS hold time from TCK rise 20 - - ns J9 tTDI_SU TDI setup time to TCK rise 25 - - ns J10 tTDI_HLD TDI hold time from TCK rise 25 - - ns J11 TCK fall to Data Valid from High-Z 2-mA drive - 23 35 ns t TDO_ZDV 4-mA drive 15 26 ns 8-mA drive 14 25 ns 8-mA drive with slew rate control 18 29 ns J12 TCK fall to Data Valid from Data Valid 2-mA drive - 21 35 ns t TDO_DV 4-mA drive 14 25 ns 8-mA drive 13 24 ns 8-mA drive with slew rate control 18 28 ns November 30, 2007 545 Preliminary LM3S6952 Microcontroller Parameter No. Parameter Parameter Name Min Nom Max Unit J13 TCK fall to High-Z from Data Valid 2-mA drive - 9 11 ns t TDO_DVZ 4-mA drive 7 9 ns 8-mA drive 6 8 ns 8-mA drive with slew rate control 7 9 ns J14 tTRST TRST assertion time 100 - - ns J15 tTRST_SU TRST setup time to TCK rise 10 - - ns Figure 23-8. JTAG Test Clock Input Timing TCK J6 J5 J3 J4 J2 Figure 23-9. JTAG Test Access Port (TAP) Timing TDO Output Valid TCK TDO Output Valid J12 TDO TDI TMS TDI Input Valid TDI Input Valid J13 J9 J10 TMS Input Valid J9 J10 TMS Input Valid J11 J7 J8 J7 J8 Figure 23-10. JTAG TRST Timing TCK J14 J15 TRST 23.2.10 General-Purpose I/O Note: All GPIOs are 5 V-tolerant. 546 November 30, 2007 Preliminary Electrical Characteristics Table 23-25. GPIO Characteristics Parameter Parameter Name Condition Min Nom Max Unit tGPIOR GPIO Rise Time (from 20% to 80% of VDD) 2-mA drive - 17 26 ns 4-mA drive 9 13 ns 8-mA drive 6 9 ns 8-mA drive with slew rate control 10 12 ns tGPIOF GPIO Fall Time (from 80% to 20% of VDD) 2-mA drive - 17 25 ns 4-mA drive 8 12 ns 8-mA drive 6 10 ns 8-mA drive with slew rate control 11 13 ns 23.2.11 Reset Table 23-26. Reset Characteristics Parameter No. Parameter Parameter Name Min Nom Max Unit R1 VTH Reset threshold - 2.0 - V R2 VBTH Brown-Out threshold 2.85 2.9 2.95 V R3 TPOR Power-On Reset timeout - 10 - ms R4 TBOR Brown-Out timeout - 500 - μs R5 TIRPOR Internal reset timeout after POR 6 - 11 ms R6 TIRBOR Internal reset timeout after BORa 0 - 1 μs R7 TIRHWR Internal reset timeout after hardware reset (RST pin) 0 - 1 ms R8 TIRSWR Internal reset timeout after software-initiated system reset a 2.5 - 20 μs R9 TIRWDR Internal reset timeout after watchdog reseta 2.5 - 20 μs R10 TVDDRISE Supply voltage (VDD) rise time (0V-3.3V) - - 100 ms R11 TMIN Minimum RST pulse width 2 - - μs a. 20 * t MOSC_per Figure 23-11. External Reset Timing (RST) RST /Reset (Internal) R11 R7 November 30, 2007 547 Preliminary LM3S6952 Microcontroller Figure 23-12. Power-On Reset Timing VDD /POR (Internal) /Reset (Internal) R3 R1 R5 Figure 23-13. Brown-Out Reset Timing VDD /BOR (Internal) /Reset (Internal) R2 R4 R6 Figure 23-14. Software Reset Timing R8 SW Reset /Reset (Internal) Figure 23-15. Watchdog Reset Timing WDOG Reset (Internal) /Reset (Internal) R9 548 November 30, 2007 Preliminary Electrical Characteristics 24 Package Information Figure 24-1. 100-Pin LQFP Package Note: The following notes apply to the package drawing. 1. All dimensions shown in mm. 2. Dimensions shown are nominal with tolerances indicated. 3. Foot length 'L' is measured at gage plane 0.25 mm above seating plane. November 30, 2007 549 Preliminary LM3S6952 Microcontroller Body +2.00 mm Footprint, 1.4 mm package thickness Symbols Leads 100L A Max. 1.60 A1 0.05 Min./0.15 Max. A2 ±0.05 1.40 D ±0.20 16.00 D1 ±0.05 14.00 E ±0.20 16.00 E1 ±0.05 14.00 L ±0.15/-0.10 0.60 e BASIC 0.50 b ±0.05 0.22 θ === 0˚~7˚ ddd Max. 0.08 ccc Max. 0.08 JEDEC Reference Drawing MS-026 Variation Designator BED 550 November 30, 2007 Preliminary Package Information A Serial Flash Loader A.1 Serial Flash Loader The Stellaris® serial flash loader is a preprogrammed flash-resident utility used to download code to the flash memory of a device without the use of a debug interface. The serial flash loader uses a simple packet interface to provide synchronous communication with the device. The flash loader runs off the crystal and does not enable the PLL, so its speed is determined by the crystal used. The two serial interfaces that can be used are the UART0 and SSI0 interfaces. For simplicity, both the data format and communication protocol are identical for both serial interfaces. A.2 Interfaces Once communication with the flash loader is established via one of the serial interfaces, that interface is used until the flash loader is reset or new code takes over. For example, once you start communicating using the SSI port, communications with the flash loader via the UART are disabled until the device is reset. A.2.1 UART The Universal Asynchronous Receivers/Transmitters (UART) communication uses a fixed serial format of 8 bits of data, no parity, and 1 stop bit. The baud rate used for communication is automatically detected by the flash loader and can be any valid baud rate supported by the host and the device. The auto detection sequence requires that the baud rate should be no more than 1/32 the crystal frequency of the board that is running the serial flash loader. This is actually the same as the hardware limitation for the maximum baud rate for any UART on a Stellaris® device which is calculated as follows: Max Baud Rate = System Clock Frequency / 16 In order to determine the baud rate, the serial flash loader needs to determine the relationship between its own crystal frequency and the baud rate. This is enough information for the flash loader to configure its UART to the same baud rate as the host. This automatic baud-rate detection allows the host to use any valid baud rate that it wants to communicate with the device. The method used to perform this automatic synchronization relies on the host sending the flash loader two bytes that are both 0x55. This generates a series of pulses to the flash loader that it can use to calculate the ratios needed to program the UART to match the host’s baud rate. After the host sends the pattern, it attempts to read back one byte of data from the UART. The flash loader returns the value of 0xCC to indicate successful detection of the baud rate. If this byte is not received after at least twice the time required to transfer the two bytes, the host can resend another pattern of 0x55, 0x55, and wait for the 0xCC byte again until the flash loader acknowledges that it has received a synchronization pattern correctly. For example, the time to wait for data back from the flash loader should be calculated as at least 2*(20(bits/sync)/baud rate (bits/sec)). For a baud rate of 115200, this time is 2*(20/115200) or 0.35 ms. A.2.2 SSI The Synchronous Serial Interface (SSI) port also uses a fixed serial format for communications, with the framing defined as Motorola format with SPH set to 1 and SPO set to 1. See “Frame Formats” on page 339 in the SSI chapter for more information on formats for this transfer protocol. Like the UART, this interface has hardware requirements that limit the maximum speed that the SSI clock can run. This allows the SSI clock to be at most 1/12 the crystal frequency of the board running November 30, 2007 551 Preliminary LM3S6952 Microcontroller the flash loader. Since the host device is the master, the SSI on the flash loader device does not need to determine the clock as it is provided directly by the host. A.3 Packet Handling All communications, with the exception of the UART auto-baud, are done via defined packets that are acknowledged (ACK) or not acknowledged (NAK) by the devices. The packets use the same format for receiving and sending packets, including the method used to acknowledge successful or unsuccessful reception of a packet. A.3.1 Packet Format All packets sent and received from the device use the following byte-packed format. struct { unsigned char ucSize; unsigned char ucCheckSum; unsigned char Data[]; }; ucSize The first byte received holds the total size of the transfer including the size and checksum bytes. ucChecksum This holds a simple checksum of the bytes in the data buffer only. The algorithm is Data[0]+Data[1]+…+ Data[ucSize-3]. Data This is the raw data intended for the device, which is formatted in some form of command interface. There should be ucSize–2 bytes of data provided in this buffer to or from the device. A.3.2 Sending Packets The actual bytes of the packet can be sent individually or all at once; the only limitation is that commands that cause flash memory access should limit the download sizes to prevent losing bytes during flash programming. This limitation is discussed further in the section that describes the serial flash loader command, COMMAND_SEND_DATA (see “COMMAND_SEND_DATA (0x24)” on page 554). Once the packet has been formatted correctly by the host, it should be sent out over the UART or SSI interface. Then the host should poll the UART or SSI interface for the first non-zero data returned from the device. The first non-zero byte will either be an ACK (0xCC) or a NAK (0x33) byte from the device indicating the packet was received successfully (ACK) or unsuccessfully (NAK). This does not indicate that the actual contents of the command issued in the data portion of the packet were valid, just that the packet was received correctly. A.3.3 Receiving Packets The flash loader sends a packet of data in the same format that it receives a packet. The flash loader may transfer leading zero data before the first actual byte of data is sent out. The first non-zero byte is the size of the packet followed by a checksum byte, and finally followed by the data itself. There is no break in the data after the first non-zero byte is sent from the flash loader. Once the device communicating with the flash loader receives all the bytes, it must either ACK or NAK the packet to indicate that the transmission was successful. The appropriate response after sending a NAK to the flash loader is to resend the command that failed and request the data again. If needed, the host may send leading zeros before sending down the ACK/NAK signal to the flash loader, as the 552 November 30, 2007 Preliminary Serial Flash Loader flash loader only accepts the first non-zero data as a valid response. This zero padding is needed by the SSI interface in order to receive data to or from the flash loader. A.4 Commands The next section defines the list of commands that can be sent to the flash loader. The first byte of the data should always be one of the defined commands, followed by data or parameters as determined by the command that is sent. A.4.1 COMMAND_PING (0X20) This command simply accepts the command and sets the global status to success. The format of the packet is as follows: Byte[0] = 0x03; Byte[1] = checksum(Byte[2]); Byte[2] = COMMAND_PING; The ping command has 3 bytes and the value for COMMAND_PING is 0x20 and the checksum of one byte is that same byte, making Byte[1] also 0x20. Since the ping command has no real return status, the receipt of an ACK can be interpreted as a successful ping to the flash loader. A.4.2 COMMAND_GET_STATUS (0x23) This command returns the status of the last command that was issued. Typically, this command should be sent after every command to ensure that the previous command was successful or to properly respond to a failure. The command requires one byte in the data of the packet and should be followed by reading a packet with one byte of data that contains a status code. The last step is to ACK or NAK the received data so the flash loader knows that the data has been read. Byte[0] = 0x03 Byte[1] = checksum(Byte[2]) Byte[2] = COMMAND_GET_STATUS A.4.3 COMMAND_DOWNLOAD (0x21) This command is sent to the flash loader to indicate where to store data and how many bytes will be sent by the COMMAND_SEND_DATA commands that follow. The command consists of two 32-bit values that are both transferred MSB first. The first 32-bit value is the address to start programming data into, while the second is the 32-bit size of the data that will be sent. This command also triggers an erase of the full area to be programmed so this command takes longer than other commands. This results in a longer time to receive the ACK/NAK back from the board. This command should be followed by a COMMAND_GET_STATUS to ensure that the Program Address and Program size are valid for the device running the flash loader. The format of the packet to send this command is a follows: Byte[0] = 11 Byte[1] = checksum(Bytes[2:10]) Byte[2] = COMMAND_DOWNLOAD Byte[3] = Program Address [31:24] Byte[4] = Program Address [23:16] Byte[5] = Program Address [15:8] Byte[6] = Program Address [7:0] Byte[7] = Program Size [31:24] November 30, 2007 553 Preliminary LM3S6952 Microcontroller Byte[8] = Program Size [23:16] Byte[9] = Program Size [15:8] Byte[10] = Program Size [7:0] A.4.4 COMMAND_SEND_DATA (0x24) This command should only follow a COMMAND_DOWNLOAD command or another COMMAND_SEND_DATA command if more data is needed. Consecutive send data commands automatically increment address and continue programming from the previous location. The caller should limit transfers of data to a maximum 8 bytes of packet data to allow the flash to program successfully and not overflow input buffers of the serial interfaces. The command terminates programming once the number of bytes indicated by the COMMAND_DOWNLOAD command has been received. Each time this function is called it should be followed by a COMMAND_GET_STATUS to ensure that the data was successfully programmed into the flash. If the flash loader sends a NAK to this command, the flash loader does not increment the current address to allow retransmission of the previous data. Byte[0] = 11 Byte[1] = checksum(Bytes[2:10]) Byte[2] = COMMAND_SEND_DATA Byte[3] = Data[0] Byte[4] = Data[1] Byte[5] = Data[2] Byte[6] = Data[3] Byte[7] = Data[4] Byte[8] = Data[5] Byte[9] = Data[6] Byte[10] = Data[7] A.4.5 COMMAND_RUN (0x22) This command is used to tell the flash loader to execute from the address passed as the parameter in this command. This command consists of a single 32-bit value that is interpreted as the address to execute. The 32-bit value is transmitted MSB first and the flash loader responds with an ACK signal back to the host device before actually executing the code at the given address. This allows the host to know that the command was received successfully and the code is now running. Byte[0] = 7 Byte[1] = checksum(Bytes[2:6]) Byte[2] = COMMAND_RUN Byte[3] = Execute Address[31:24] Byte[4] = Execute Address[23:16] Byte[5] = Execute Address[15:8] Byte[6] = Execute Address[7:0] A.4.6 COMMAND_RESET (0x25) This command is used to tell the flash loader device to reset. This is useful when downloading a new image that overwrote the flash loader and wants to start from a full reset. Unlike the COMMAND_RUN command, this allows the initial stack pointer to be read by the hardware and set up for the new code. It can also be used to reset the flash loader if a critical error occurs and the host device wants to restart communication with the flash loader. 554 November 30, 2007 Preliminary Serial Flash Loader Byte[0] = 3 Byte[1] = checksum(Byte[2]) Byte[2] = COMMAND_RESET The flash loader responds with an ACK signal back to the host device before actually executing the software reset to the device running the flash loader. This allows the host to know that the command was received successfully and the part will be reset. November 30, 2007 555 Preliminary LM3S6952 Microcontroller B Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 System Control Base 0x400F.E000 DID0, type RO, offset 0x000, reset - VER CLASS MAJOR MINOR PBORCTL, type R/W, offset 0x030, reset 0x0000.7FFD BORIOR LDOPCTL, type R/W, offset 0x034, reset 0x0000.0000 VADJ RIS, type RO, offset 0x050, reset 0x0000.0000 PLLLRIS BORRIS IMC, type R/W, offset 0x054, reset 0x0000.0000 PLLLIM BORIM MISC, type R/W1C, offset 0x058, reset 0x0000.0000 PLLLMIS BORMIS RESC, type R/W, offset 0x05C, reset - LDO SW WDT BOR POR EXT RCC, type R/W, offset 0x060, reset 0x07AE.3AD1 ACG SYSDIV USESYSDIV USEPWMDIV PWMDIV PWRDN BYPASS XTAL OSCSRC IOSCDIS MOSCDIS PLLCFG, type RO, offset 0x064, reset - F R RCC2, type R/W, offset 0x070, reset 0x0780.2800 USERCC2 SYSDIV2 PWRDN2 BYPASS2 OSCSRC2 DSLPCLKCFG, type R/W, offset 0x144, reset 0x0780.0000 DSDIVORIDE DSOSCSRC DID1, type RO, offset 0x004, reset - VER FAM PARTNO PINCOUNT TEMP PKG ROHS QUAL DC0, type RO, offset 0x008, reset 0x00FF.007F SRAMSZ FLASHSZ DC1, type RO, offset 0x010, reset 0x0011.32FF PWM ADC MINSYSDIV MAXADCSPD MPU HIB TEMPSNS PLL WDT SWO SWD JTAG DC2, type RO, offset 0x014, reset 0x0707.1117 COMP2 COMP1 COMP0 TIMER2 TIMER1 TIMER0 I2C0 QEI0 SSI0 UART2 UART1 UART0 DC3, type RO, offset 0x018, reset 0x0F07.BFCF CCP3 CCP2 CCP1 CCP0 ADC2 ADC1 ADC0 PWMFAULT C2PLUS C2MINUS C1O C1PLUS C1MINUS C0O C0PLUS C0MINUS PWM3 PWM2 PWM1 PWM0 556 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 DC4, type RO, offset 0x01C, reset 0x5000.007F EPHY0 EMAC0 GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA RCGC0, type R/W, offset 0x100, reset 0x00000040 PWM ADC MAXADCSPD HIB WDT SCGC0, type R/W, offset 0x110, reset 0x00000040 PWM ADC MAXADCSPD HIB WDT DCGC0, type R/W, offset 0x120, reset 0x00000040 PWM ADC MAXADCSPD HIB WDT RCGC1, type R/W, offset 0x104, reset 0x00000000 COMP2 COMP1 COMP0 TIMER2 TIMER1 TIMER0 I2C0 QEI0 SSI0 UART2 UART1 UART0 SCGC1, type R/W, offset 0x114, reset 0x00000000 COMP2 COMP1 COMP0 TIMER2 TIMER1 TIMER0 I2C0 QEI0 SSI0 UART2 UART1 UART0 DCGC1, type R/W, offset 0x124, reset 0x00000000 COMP2 COMP1 COMP0 TIMER2 TIMER1 TIMER0 I2C0 QEI0 SSI0 UART2 UART1 UART0 RCGC2, type R/W, offset 0x108, reset 0x00000000 EPHY0 EMAC0 GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA SCGC2, type R/W, offset 0x118, reset 0x00000000 EPHY0 EMAC0 GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA DCGC2, type R/W, offset 0x128, reset 0x00000000 EPHY0 EMAC0 GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA SRCR0, type R/W, offset 0x040, reset 0x00000000 PWM ADC HIB WDT SRCR1, type R/W, offset 0x044, reset 0x00000000 COMP2 COMP1 COMP0 TIMER2 TIMER1 TIMER0 I2C0 QEI0 SSI0 UART2 UART1 UART0 SRCR2, type R/W, offset 0x048, reset 0x00000000 EPHY0 EMAC0 GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Hibernation Module Base 0x400F.C000 HIBRTCC, type RO, offset 0x000, reset 0x0000.0000 RTCC RTCC HIBRTCM0, type R/W, offset 0x004, reset 0xFFFF.FFFF RTCM0 RTCM0 HIBRTCM1, type R/W, offset 0x008, reset 0xFFFF.FFFF RTCM1 RTCM1 HIBRTCLD, type R/W, offset 0x00C, reset 0xFFFF.FFFF RTCLD RTCLD November 30, 2007 557 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 HIBCTL, type R/W, offset 0x010, reset 0x0000.0000 VABORT CLK32EN LOWBATEN PINWEN RTCWEN CLKSEL HIBREQ RTCEN HIBIM, type R/W, offset 0x014, reset 0x0000.0000 EXTW LOWBAT RTCALT1 RTCALT0 HIBRIS, type RO, offset 0x018, reset 0x0000.0000 EXTW LOWBAT RTCALT1 RTCALT0 HIBMIS, type RO, offset 0x01C, reset 0x0000.0000 EXTW LOWBAT RTCALT1 RTCALT0 HIBIC, type R/W1C, offset 0x020, reset 0x0000.0000 EXTW LOWBAT RTCALT1 RTCALT0 HIBRTCT, type R/W, offset 0x024, reset 0x0000.7FFF TRIM HIBDATA, type R/W, offset 0x030-0x12C, reset 0x0000.0000 RTD RTD Internal Memory Flash Control Offset Base 0x400F.D000 FMA, type R/W, offset 0x000, reset 0x0000.0000 OFFSET OFFSET FMD, type R/W, offset 0x004, reset 0x0000.0000 DATA DATA FMC, type R/W, offset 0x008, reset 0x0000.0000 WRKEY COMT MERASE ERASE WRITE FCRIS, type RO, offset 0x00C, reset 0x0000.0000 PRIS ARIS FCIM, type R/W, offset 0x010, reset 0x0000.0000 PMASK AMASK FCMISC, type R/W1C, offset 0x014, reset 0x0000.0000 PMISC AMISC Internal Memory System Control Offset Base 0x400F.E000 USECRL, type R/W, offset 0x140, reset 0x31 USEC FMPRE0, type R/W, offset 0x130 and 0x200, reset 0xFFFF.FFFF READ_ENABLE READ_ENABLE 558 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 FMPPE0, type R/W, offset 0x134 and 0x400, reset 0xFFFF.FFFF PROG_ENABLE PROG_ENABLE USER_DBG, type R/W, offset 0x1D0, reset 0xFFFF.FFFE NW DATA DATA DBG1 DBG0 USER_REG0, type R/W, offset 0x1E0, reset 0xFFFF.FFFF NW DATA DATA USER_REG1, type R/W, offset 0x1E4, reset 0xFFFF.FFFF NW DATA DATA FMPRE1, type R/W, offset 0x204, reset 0xFFFF.FFFF READ_ENABLE READ_ENABLE FMPRE2, type R/W, offset 0x208, reset 0xFFFF.FFFF READ_ENABLE READ_ENABLE FMPRE3, type R/W, offset 0x20C, reset 0xFFFF.FFFF READ_ENABLE READ_ENABLE FMPPE1, type R/W, offset 0x404, reset 0xFFFF.FFFF PROG_ENABLE PROG_ENABLE FMPPE2, type R/W, offset 0x408, reset 0xFFFF.FFFF PROG_ENABLE PROG_ENABLE FMPPE3, type R/W, offset 0x40C, reset 0xFFFF.FFFF PROG_ENABLE PROG_ENABLE General-Purpose Input/Outputs (GPIOs) GPIO Port A base: 0x4000.4000 GPIO Port B base: 0x4000.5000 GPIO Port C base: 0x4000.6000 GPIO Port D base: 0x4000.7000 GPIO Port E base: 0x4002.4000 GPIO Port F base: 0x4002.5000 GPIO Port G base: 0x4002.6000 GPIODATA, type R/W, offset 0x000, reset 0x0000.0000 DATA GPIODIR, type R/W, offset 0x400, reset 0x0000.0000 DIR GPIOIS, type R/W, offset 0x404, reset 0x0000.0000 IS GPIOIBE, type R/W, offset 0x408, reset 0x0000.0000 IBE GPIOIEV, type R/W, offset 0x40C, reset 0x0000.0000 IEV November 30, 2007 559 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 GPIOIM, type R/W, offset 0x410, reset 0x0000.0000 IME GPIORIS, type RO, offset 0x414, reset 0x0000.0000 RIS GPIOMIS, type RO, offset 0x418, reset 0x0000.0000 MIS GPIOICR, type W1C, offset 0x41C, reset 0x0000.0000 IC GPIOAFSEL, type R/W, offset 0x420, reset - AFSEL GPIODR2R, type R/W, offset 0x500, reset 0x0000.00FF DRV2 GPIODR4R, type R/W, offset 0x504, reset 0x0000.0000 DRV4 GPIODR8R, type R/W, offset 0x508, reset 0x0000.0000 DRV8 GPIOODR, type R/W, offset 0x50C, reset 0x0000.0000 ODE GPIOPUR, type R/W, offset 0x510, reset - PUE GPIOPDR, type R/W, offset 0x514, reset 0x0000.0000 PDE GPIOSLR, type R/W, offset 0x518, reset 0x0000.0000 SRL GPIODEN, type R/W, offset 0x51C, reset - DEN GPIOLOCK, type R/W, offset 0x520, reset 0x0000.0001 LOCK LOCK GPIOCR, type -, offset 0x524, reset - CR GPIOPeriphID4, type RO, offset 0xFD0, reset 0x0000.0000 PID4 GPIOPeriphID5, type RO, offset 0xFD4, reset 0x0000.0000 PID5 560 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 GPIOPeriphID6, type RO, offset 0xFD8, reset 0x0000.0000 PID6 GPIOPeriphID7, type RO, offset 0xFDC, reset 0x0000.0000 PID7 GPIOPeriphID0, type RO, offset 0xFE0, reset 0x0000.0061 PID0 GPIOPeriphID1, type RO, offset 0xFE4, reset 0x0000.0000 PID1 GPIOPeriphID2, type RO, offset 0xFE8, reset 0x0000.0018 PID2 GPIOPeriphID3, type RO, offset 0xFEC, reset 0x0000.0001 PID3 GPIOPCellID0, type RO, offset 0xFF0, reset 0x0000.000D CID0 GPIOPCellID1, type RO, offset 0xFF4, reset 0x0000.00F0 CID1 GPIOPCellID2, type RO, offset 0xFF8, reset 0x0000.0005 CID2 GPIOPCellID3, type RO, offset 0xFFC, reset 0x0000.00B1 CID3 General-Purpose Timers Timer0 base: 0x4003.0000 Timer1 base: 0x4003.1000 Timer2 base: 0x4003.2000 GPTMCFG, type R/W, offset 0x000, reset 0x0000.0000 GPTMCFG GPTMTAMR, type R/W, offset 0x004, reset 0x0000.0000 TAAMS TACMR TAMR GPTMTBMR, type R/W, offset 0x008, reset 0x0000.0000 TBAMS TBCMR TBMR GPTMCTL, type R/W, offset 0x00C, reset 0x0000.0000 TBPWML TBOTE TBEVENT TBSTALL TBEN TAPWML TAOTE RTCEN TAEVENT TASTALL TAEN GPTMIMR, type R/W, offset 0x018, reset 0x0000.0000 CBEIM CBMIM TBTOIM RTCIM CAEIM CAMIM TATOIM GPTMRIS, type RO, offset 0x01C, reset 0x0000.0000 CBERIS CBMRIS TBTORIS RTCRIS CAERIS CAMRIS TATORIS November 30, 2007 561 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 GPTMMIS, type RO, offset 0x020, reset 0x0000.0000 CBEMIS CBMMIS TBTOMIS RTCMIS CAEMIS CAMMIS TATOMIS GPTMICR, type W1C, offset 0x024, reset 0x0000.0000 CBECINT CBMCINT TBTOCINT RTCCINT CAECINT CAMCINT TATOCINT GPTMTAILR, type R/W, offset 0x028, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) TAILRH TAILRL GPTMTBILR, type R/W, offset 0x02C, reset 0x0000.FFFF TBILRL GPTMTAMATCHR, type R/W, offset 0x030, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) TAMRH TAMRL GPTMTBMATCHR, type R/W, offset 0x034, reset 0x0000.FFFF TBMRL GPTMTAPR, type R/W, offset 0x038, reset 0x0000.0000 TAPSR GPTMTBPR, type R/W, offset 0x03C, reset 0x0000.0000 TBPSR GPTMTAPMR, type R/W, offset 0x040, reset 0x0000.0000 TAPSMR GPTMTBPMR, type R/W, offset 0x044, reset 0x0000.0000 TBPSMR GPTMTAR, type RO, offset 0x048, reset 0x0000.FFFF (16-bit mode) and 0xFFFF.FFFF (32-bit mode) TARH TARL GPTMTBR, type RO, offset 0x04C, reset 0x0000.FFFF TBRL Watchdog Timer Base 0x4000.0000 WDTLOAD, type R/W, offset 0x000, reset 0xFFFF.FFFF WDTLoad WDTLoad WDTVALUE, type RO, offset 0x004, reset 0xFFFF.FFFF WDTValue WDTValue WDTCTL, type R/W, offset 0x008, reset 0x0000.0000 RESEN INTEN WDTICR, type WO, offset 0x00C, reset - WDTIntClr WDTIntClr WDTRIS, type RO, offset 0x010, reset 0x0000.0000 WDTRIS 562 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 WDTMIS, type RO, offset 0x014, reset 0x0000.0000 WDTMIS WDTTEST, type R/W, offset 0x418, reset 0x0000.0000 STALL WDTLOCK, type R/W, offset 0xC00, reset 0x0000.0000 WDTLock WDTLock WDTPeriphID4, type RO, offset 0xFD0, reset 0x0000.0000 PID4 WDTPeriphID5, type RO, offset 0xFD4, reset 0x0000.0000 PID5 WDTPeriphID6, type RO, offset 0xFD8, reset 0x0000.0000 PID6 WDTPeriphID7, type RO, offset 0xFDC, reset 0x0000.0000 PID7 WDTPeriphID0, type RO, offset 0xFE0, reset 0x0000.0005 PID0 WDTPeriphID1, type RO, offset 0xFE4, reset 0x0000.0018 PID1 WDTPeriphID2, type RO, offset 0xFE8, reset 0x0000.0018 PID2 WDTPeriphID3, type RO, offset 0xFEC, reset 0x0000.0001 PID3 WDTPCellID0, type RO, offset 0xFF0, reset 0x0000.000D CID0 WDTPCellID1, type RO, offset 0xFF4, reset 0x0000.00F0 CID1 WDTPCellID2, type RO, offset 0xFF8, reset 0x0000.0005 CID2 WDTPCellID3, type RO, offset 0xFFC, reset 0x0000.00B1 CID3 Analog-to-Digital Converter (ADC) Base 0x4003.8000 ADCACTSS, type R/W, offset 0x000, reset 0x0000.0000 ASEN3 ASEN2 ASEN1 ASEN0 ADCRIS, type RO, offset 0x004, reset 0x0000.0000 INR3 INR2 INR1 INR0 November 30, 2007 563 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ADCIM, type R/W, offset 0x008, reset 0x0000.0000 MASK3 MASK2 MASK1 MASK0 ADCISC, type R/W1C, offset 0x00C, reset 0x0000.0000 IN3 IN2 IN1 IN0 ADCOSTAT, type R/W1C, offset 0x010, reset 0x0000.0000 OV3 OV2 OV1 OV0 ADCEMUX, type R/W, offset 0x014, reset 0x0000.0000 EM3 EM2 EM1 EM0 ADCUSTAT, type R/W1C, offset 0x018, reset 0x0000.0000 UV3 UV2 UV1 UV0 ADCSSPRI, type R/W, offset 0x020, reset 0x0000.3210 SS3 SS2 SS1 SS0 ADCPSSI, type WO, offset 0x028, reset - SS3 SS2 SS1 SS0 ADCSAC, type R/W, offset 0x030, reset 0x0000.0000 AVG ADCSSMUX0, type R/W, offset 0x040, reset 0x0000.0000 MUX7 MUX6 MUX5 MUX4 MUX3 MUX2 MUX1 MUX0 ADCSSCTL0, type R/W, offset 0x044, reset 0x0000.0000 TS7 IE7 END7 D7 TS6 IE6 END6 D6 TS5 IE5 END5 D5 TS4 IE4 END4 D4 TS3 IE3 END3 D3 TS2 IE2 END2 D2 TS1 IE1 END1 D1 TS0 IE0 END0 D0 ADCSSFIFO0, type RO, offset 0x048, reset 0x0000.0000 DATA ADCSSFIFO1, type RO, offset 0x068, reset 0x0000.0000 DATA ADCSSFIFO2, type RO, offset 0x088, reset 0x0000.0000 DATA ADCSSFIFO3, type RO, offset 0x0A8, reset 0x0000.0000 DATA ADCSSFSTAT0, type RO, offset 0x04C, reset 0x0000.0100 FULL EMPTY HPTR TPTR ADCSSFSTAT1, type RO, offset 0x06C, reset 0x0000.0100 FULL EMPTY HPTR TPTR ADCSSFSTAT2, type RO, offset 0x08C, reset 0x0000.0100 FULL EMPTY HPTR TPTR 564 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ADCSSFSTAT3, type RO, offset 0x0AC, reset 0x0000.0100 FULL EMPTY HPTR TPTR ADCSSMUX1, type RO, offset 0x060, reset 0x0000.0000 MUX3 MUX2 MUX1 MUX0 ADCSSMUX2, type RO, offset 0x080, reset 0x0000.0000 MUX3 MUX2 MUX1 MUX0 ADCSSCTL1, type RO, offset 0x064, reset 0x0000.0000 TS3 IE3 END3 D3 TS2 IE2 END2 D2 TS1 IE1 END1 D1 TS0 IE0 END0 D0 ADCSSCTL2, type RO, offset 0x084, reset 0x0000.0000 TS3 IE3 END3 D3 TS2 IE2 END2 D2 TS1 IE1 END1 D1 TS0 IE0 END0 D0 ADCSSMUX3, type R/W, offset 0x0A0, reset 0x0000.0000 MUX0 ADCSSCTL3, type R/W, offset 0x0A4, reset 0x0000.0002 TS0 IE0 END0 D0 ADCTMLB, type RO, offset 0x100, reset 0x0000.0000 CNT CONT DIFF TS MUX ADCTMLB, type WO, offset 0x100, reset 0x0000.0000 LB Universal Asynchronous Receivers/Transmitters (UARTs) UART0 base: 0x4000.C000 UART1 base: 0x4000.D000 UART2 base: 0x4000.E000 UARTDR, type R/W, offset 0x000, reset 0x0000.0000 OE BE PE FE DATA UARTRSR/UARTECR, type RO, offset 0x004, reset 0x0000.0000 OE BE PE FE UARTRSR/UARTECR, type WO, offset 0x004, reset 0x0000.0000 DATA UARTFR, type RO, offset 0x018, reset 0x0000.0090 TXFE RXFF TXFF RXFE BUSY UARTILPR, type R/W, offset 0x020, reset 0x0000.0000 ILPDVSR UARTIBRD, type R/W, offset 0x024, reset 0x0000.0000 DIVINT UARTFBRD, type R/W, offset 0x028, reset 0x0000.0000 DIVFRAC November 30, 2007 565 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 UARTLCRH, type R/W, offset 0x02C, reset 0x0000.0000 SPS WLEN FEN STP2 EPS PEN BRK UARTCTL, type R/W, offset 0x030, reset 0x0000.0300 RXE TXE LBE SIRLP SIREN UARTEN UARTIFLS, type R/W, offset 0x034, reset 0x0000.0012 RXIFLSEL TXIFLSEL UARTIM, type R/W, offset 0x038, reset 0x0000.0000 OEIM BEIM PEIM FEIM RTIM TXIM RXIM UARTRIS, type RO, offset 0x03C, reset 0x0000.000F OERIS BERIS PERIS FERIS RTRIS TXRIS RXRIS UARTMIS, type RO, offset 0x040, reset 0x0000.0000 OEMIS BEMIS PEMIS FEMIS RTMIS TXMIS RXMIS UARTICR, type W1C, offset 0x044, reset 0x0000.0000 OEIC BEIC PEIC FEIC RTIC TXIC RXIC UARTPeriphID4, type RO, offset 0xFD0, reset 0x0000.0000 PID4 UARTPeriphID5, type RO, offset 0xFD4, reset 0x0000.0000 PID5 UARTPeriphID6, type RO, offset 0xFD8, reset 0x0000.0000 PID6 UARTPeriphID7, type RO, offset 0xFDC, reset 0x0000.0000 PID7 UARTPeriphID0, type RO, offset 0xFE0, reset 0x0000.0011 PID0 UARTPeriphID1, type RO, offset 0xFE4, reset 0x0000.0000 PID1 UARTPeriphID2, type RO, offset 0xFE8, reset 0x0000.0018 PID2 UARTPeriphID3, type RO, offset 0xFEC, reset 0x0000.0001 PID3 UARTPCellID0, type RO, offset 0xFF0, reset 0x0000.000D CID0 UARTPCellID1, type RO, offset 0xFF4, reset 0x0000.00F0 CID1 566 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 UARTPCellID2, type RO, offset 0xFF8, reset 0x0000.0005 CID2 UARTPCellID3, type RO, offset 0xFFC, reset 0x0000.00B1 CID3 Synchronous Serial Interface (SSI) SSI0 base: 0x4000.8000 SSICR0, type R/W, offset 0x000, reset 0x0000.0000 SCR SPH SPO FRF DSS SSICR1, type R/W, offset 0x004, reset 0x0000.0000 SOD MS SSE LBM SSIDR, type R/W, offset 0x008, reset 0x0000.0000 DATA SSISR, type RO, offset 0x00C, reset 0x0000.0003 BSY RFF RNE TNF TFE SSICPSR, type R/W, offset 0x010, reset 0x0000.0000 CPSDVSR SSIIM, type R/W, offset 0x014, reset 0x0000.0000 TXIM RXIM RTIM RORIM SSIRIS, type RO, offset 0x018, reset 0x0000.0008 TXRIS RXRIS RTRIS RORRIS SSIMIS, type RO, offset 0x01C, reset 0x0000.0000 TXMIS RXMIS RTMIS RORMIS SSIICR, type W1C, offset 0x020, reset 0x0000.0000 RTIC RORIC SSIPeriphID4, type RO, offset 0xFD0, reset 0x0000.0000 PID4 SSIPeriphID5, type RO, offset 0xFD4, reset 0x0000.0000 PID5 SSIPeriphID6, type RO, offset 0xFD8, reset 0x0000.0000 PID6 SSIPeriphID7, type RO, offset 0xFDC, reset 0x0000.0000 PID7 SSIPeriphID0, type RO, offset 0xFE0, reset 0x0000.0022 PID0 SSIPeriphID1, type RO, offset 0xFE4, reset 0x0000.0000 PID1 November 30, 2007 567 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 SSIPeriphID2, type RO, offset 0xFE8, reset 0x0000.0018 PID2 SSIPeriphID3, type RO, offset 0xFEC, reset 0x0000.0001 PID3 SSIPCellID0, type RO, offset 0xFF0, reset 0x0000.000D CID0 SSIPCellID1, type RO, offset 0xFF4, reset 0x0000.00F0 CID1 SSIPCellID2, type RO, offset 0xFF8, reset 0x0000.0005 CID2 SSIPCellID3, type RO, offset 0xFFC, reset 0x0000.00B1 CID3 Inter-Integrated Circuit (I2C) Interface I2C Master I2C Master 0 base: 0x4002.0000 I2CMSA, type R/W, offset 0x000, reset 0x0000.0000 SA R/S I2CMCS, type RO, offset 0x004, reset 0x0000.0000 BUSBSY IDLE ARBLST DATACK ADRACK ERROR BUSY I2CMCS, type WO, offset 0x004, reset 0x0000.0000 ACK STOP START RUN I2CMDR, type R/W, offset 0x008, reset 0x0000.0000 DATA I2CMTPR, type R/W, offset 0x00C, reset 0x0000.0001 TPR I2CMIMR, type R/W, offset 0x010, reset 0x0000.0000 IM I2CMRIS, type RO, offset 0x014, reset 0x0000.0000 RIS I2CMMIS, type RO, offset 0x018, reset 0x0000.0000 MIS I2CMICR, type WO, offset 0x01C, reset 0x0000.0000 IC I2CMCR, type R/W, offset 0x020, reset 0x0000.0000 SFE MFE LPBK Inter-Integrated Circuit (I2C) Interface 568 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 I2C Slave I2C Slave 0 base: 0x4002.0800 I2CSOAR, type R/W, offset 0x000, reset 0x0000.0000 OAR I2CSCSR, type RO, offset 0x004, reset 0x0000.0000 FBR TREQ RREQ I2CSCSR, type WO, offset 0x004, reset 0x0000.0000 DA I2CSDR, type R/W, offset 0x008, reset 0x0000.0000 DATA I2CSIMR, type R/W, offset 0x00C, reset 0x0000.0000 IM I2CSRIS, type RO, offset 0x010, reset 0x0000.0000 RIS I2CSMIS, type RO, offset 0x014, reset 0x0000.0000 MIS I2CSICR, type WO, offset 0x018, reset 0x0000.0000 IC Ethernet Controller Ethernet MAC Base 0x4004.8000 MACRIS, type RO, offset 0x000, reset 0x0000.0000 PHYINT MDINT RXER FOV TXEMP TXER RXINT MACIACK, type W1C, offset 0x000, reset 0x0000.0000 PHYINT MDINT RXER FOV TXEMP TXER RXINT MACIM, type R/W, offset 0x004, reset 0x0000.007F PHYINTM MDINTM RXERM FOVM TXEMPM TXERM RXINTM MACRCTL, type R/W, offset 0x008, reset 0x0000.0008 RSTFIFO BADCRC PRMS AMUL RXEN MACTCTL, type R/W, offset 0x00C, reset 0x0000.0000 DUPLEX CRC PADEN TXEN MACDATA, type RO, offset 0x010, reset 0x0000.0000 RXDATA RXDATA MACDATA, type WO, offset 0x010, reset 0x0000.0000 TXDATA TXDATA November 30, 2007 569 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MACIA0, type R/W, offset 0x014, reset 0x0000.0000 MACOCT4 MACOCT3 MACOCT2 MACOCT1 MACIA1, type R/W, offset 0x018, reset 0x0000.0000 MACOCT6 MACOCT5 MACTHR, type R/W, offset 0x01C, reset 0x0000.003F THRESH MACMCTL, type R/W, offset 0x020, reset 0x0000.0000 REGADR WRITE START MACMDV, type R/W, offset 0x024, reset 0x0000.0080 DIV MACMTXD, type R/W, offset 0x02C, reset 0x0000.0000 MDTX MACMRXD, type R/W, offset 0x030, reset 0x0000.0000 MDRX MACNP, type RO, offset 0x034, reset 0x0000.0000 NPR MACTR, type R/W, offset 0x038, reset 0x0000.0000 NEWTX Ethernet Controller MII Management Base 0x4004.8000 MR0, type R/W, address 0x00, reset 0x3100 RESET LOOPBK SPEEDSL ANEGEN PWRDN ISO RANEG DUPLEX COLT MR1, type RO, address 0x01, reset 0x7849 100X_F 100X_H 10T_F 10T_H MFPS ANEGC RFAULT ANEGA LINK JAB EXTD MR2, type RO, address 0x02, reset 0x000E OUI[21:6] MR3, type RO, address 0x03, reset 0x7237 OUI[5:0] MN RN MR4, type R/W, address 0x04, reset 0x01E1 NP RF A3 A2 A1 A0 S[4:0] MR5, type RO, address 0x05, reset 0x0000 NP ACK RF A[7:0] S[4:0] MR6, type RO, address 0x06, reset 0x0000 PDF LPNPA PRX LPANEGA MR16, type R/W, address 0x10, reset 0x0140 RPTR INPOL TXHIM SQEI NL10 APOL RVSPOL PCSBP RXCC MR17, type R/W, address 0x11, reset 0x0000 JABBER_IE RXER_IE PRX_IE PDF_IE LPACK_IE LSCHG_IE RFAULT_IE ANEGCOMP_IE JABBER_INT RXER_INT PRX_INT PDF_INT LPACK_INT LSCHG_INT RFAULT_INT ANEGCOMP_INT MR18, type RO, address 0x12, reset 0x0000 ANEGF DPLX RATE RXSD RX_LOCK MR19, type R/W, address 0x13, reset 0x4000 TXO[1:0] 570 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MR23, type R/W, address 0x17, reset 0x0010 LED1[3:0] LED0[3:0] MR24, type R/W, address 0x18, reset 0x00C0 PD_MODE AUTO_SW MDIX MDIX_CM MDIX_SD Analog Comparators Base 0x4003.C000 ACMIS, type R/W1C, offset 0x00, reset 0x0000.0000 IN2 IN1 IN0 ACRIS, type RO, offset 0x04, reset 0x0000.0000 IN2 IN1 IN0 ACINTEN, type R/W, offset 0x08, reset 0x0000.0000 IN2 IN1 IN0 ACREFCTL, type R/W, offset 0x10, reset 0x0000.0000 EN RNG VREF ACSTAT0, type RO, offset 0x20, reset 0x0000.0000 OVAL ACSTAT1, type RO, offset 0x40, reset 0x0000.0000 OVAL ACSTAT2, type RO, offset 0x60, reset 0x0000.0000 OVAL ACCTL0, type R/W, offset 0x24, reset 0x0000.0000 TOEN ASRCP TSLVAL TSEN ISLVAL ISEN CINV ACCTL1, type R/W, offset 0x44, reset 0x0000.0000 TOEN ASRCP TSLVAL TSEN ISLVAL ISEN CINV ACCTL2, type R/W, offset 0x64, reset 0x0000.0000 TOEN ASRCP TSLVAL TSEN ISLVAL ISEN CINV Pulse Width Modulator (PWM) Base 0x4002.8000 PWMCTL, type R/W, offset 0x000, reset 0x0000.0000 GlobalSync1 GlobalSync0 PWMSYNC, type R/W, offset 0x004, reset 0x0000.0000 Sync1 Sync0 PWMENABLE, type R/W, offset 0x008, reset 0x0000.0000 PWM3En PWM2En PWM1En PWM0En PWMINVERT, type R/W, offset 0x00C, reset 0x0000.0000 PWM3Inv PWM2Inv PWM1Inv PWM0Inv November 30, 2007 571 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PWMFAULT, type R/W, offset 0x010, reset 0x0000.0000 Fault3 Fault2 Fault1 Fault0 PWMINTEN, type R/W, offset 0x014, reset 0x0000.0000 IntFault IntPWM1 IntPWM0 PWMRIS, type RO, offset 0x018, reset 0x0000.0000 IntFault IntPWM1 IntPWM0 PWMISC, type R/W1C, offset 0x01C, reset 0x0000.0000 IntFault IntPWM1 IntPWM0 PWMSTATUS, type RO, offset 0x020, reset 0x0000.0000 Fault PWM0CTL, type RO, offset 0x040, reset 0x0000.0000 CmpBUpd CmpAUpd LoadUpd Debug Mode Enable PWM1CTL, type RO, offset 0x080, reset 0x0000.0000 CmpBUpd CmpAUpd LoadUpd Debug Mode Enable PWM0INTEN, type RO, offset 0x044, reset 0x0000.0000 TrCmpBD TrCmpBU TrCmpAD TrCmpAU TrCntLoad TrCntZero IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM1INTEN, type RO, offset 0x084, reset 0x0000.0000 TrCmpBD TrCmpBU TrCmpAD TrCmpAU TrCntLoad TrCntZero IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM0RIS, type RO, offset 0x048, reset 0x0000.0000 IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM1RIS, type RO, offset 0x088, reset 0x0000.0000 IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM0ISC, type RO, offset 0x04C, reset 0x0000.0000 IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM1ISC, type RO, offset 0x08C, reset 0x0000.0000 IntCmpBD IntCmpBU IntCmpAD IntCmpAU IntCntLoad IntCntZero PWM0LOAD, type RO, offset 0x050, reset 0x0000.0000 Load PWM1LOAD, type RO, offset 0x090, reset 0x0000.0000 Load PWM0COUNT, type RO, offset 0x054, reset 0x0000.0000 Count PWM1COUNT, type RO, offset 0x094, reset 0x0000.0000 Count 572 November 30, 2007 Preliminary Register Quick Reference 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PWM0CMPA, type RO, offset 0x058, reset 0x0000.0000 CompA PWM1CMPA, type RO, offset 0x098, reset 0x0000.0000 CompA PWM0CMPB, type RO, offset 0x05C, reset 0x0000.0000 CompB PWM1CMPB, type RO, offset 0x09C, reset 0x0000.0000 CompB PWM0GENA, type RO, offset 0x060, reset 0x0000.0000 ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero PWM1GENA, type RO, offset 0x0A0, reset 0x0000.0000 ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero PWM0GENB, type RO, offset 0x064, reset 0x0000.0000 ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero PWM1GENB, type RO, offset 0x0A4, reset 0x0000.0000 ActCmpBD ActCmpBU ActCmpAD ActCmpAU ActLoad ActZero PWM0DBCTL, type RO, offset 0x068, reset 0x0000.0000 Enable PWM1DBCTL, type RO, offset 0x0A8, reset 0x0000.0000 Enable PWM0DBRISE, type RO, offset 0x06C, reset 0x0000.0000 RiseDelay PWM1DBRISE, type RO, offset 0x0AC, reset 0x0000.0000 RiseDelay PWM0DBFALL, type RO, offset 0x070, reset 0x0000.0000 FallDelay PWM1DBFALL, type RO, offset 0x0B0, reset 0x0000.0000 FallDelay Quadrature Encoder Interface (QEI) QEI0 base: 0x4002.C000 QEICTL, type R/W, offset 0x000, reset 0x0000.0000 STALLEN INVI INVB INVA VelDiv VelEn ResMode CapMode SigMode Swap Enable QEISTAT, type RO, offset 0x004, reset 0x0000.0000 Direction Error QEIPOS, type R/W, offset 0x008, reset 0x0000.0000 Position Position November 30, 2007 573 Preliminary LM3S6952 Microcontroller 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 QEIMAXPOS, type R/W, offset 0x00C, reset 0x0000.0000 MaxPos MaxPos QEILOAD, type R/W, offset 0x010, reset 0x0000.0000 Load Load QEITIME, type RO, offset 0x014, reset 0x0000.0000 Time Time QEICOUNT, type RO, offset 0x018, reset 0x0000.0000 Count Count QEISPEED, type RO, offset 0x01C, reset 0x0000.0000 Speed Speed QEIINTEN, type R/W, offset 0x020, reset 0x0000.0000 IntError IntDir IntTimer IntIndex QEIRIS, type RO, offset 0x024, reset 0x0000.0000 IntError IntDir IntTimer IntIndex QEIISC, type R/W1C, offset 0x028, reset 0x0000.0000 IntError IntDir IntTimer IntIndex 574 November 30, 2007 Preliminary Register Quick Reference C Ordering and Contact Information C.1 Ordering Information L M 3 S n n n n – g p p s s – r r m Part Number Temperature Package Speed Revision Shipping Medium I = -40 C to 85 C T = Tape-and-reel Omitted = Default shipping (tray or tube) Omitted = Default to current shipping revision A0 = First all-layer mask A1 = Metal layers update to A0 A2 = Metal layers update to A1 B0 = Second all-layer mask revision RN = 28-pin SOIC QN = 48-pin LQFP QC = 100-pin LQFP 20 = 20 MHz 25 = 25 MHz 50 = 50 MHz Table C-1. Part Ordering Information Orderable Part Number Description Stellaris® LM3S6952-IQC50 LM3S6952 Microcontroller Stellaris® LM3S6952-IQC50(T) LM3S6952 Microcontroller C.2 Kits The Luminary Micro Stellaris® Family provides the hardware and software tools that engineers need to begin development quickly. ■ Reference Design Kits accelerate product development by providing ready-to-run hardware, and comprehensive documentation including hardware design files: http://www.luminarymicro.com/products/reference_design_kits/ ■ Evaluation Kits provide a low-cost and effective means of evaluating Stellaris® microcontrollers before purchase: http://www.luminarymicro.com/products/evaluation_kits/ ■ Development Kits provide you with all the tools you need to develop and prototype embedded applications right out of the box: http://www.luminarymicro.com/products/boards.html See the Luminary Micro website for the latest tools available or ask your Luminary Micro distributor. C.3 Company Information Luminary Micro, Inc. designs, markets, and sells ARM Cortex-M3-based microcontrollers (MCUs). Austin, Texas-based Luminary Micro is the lead partner for the Cortex-M3 processor, delivering the world's first silicon implementation of the Cortex-M3 processor. Luminary Micro's introduction of the November 30, 2007 575 Preliminary LM3S6952 Microcontroller Stellaris® family of products provides 32-bit performance for the same price as current 8- and 16-bit microcontroller designs. With entry-level pricing at $1.00 for an ARM technology-based MCU, Luminary Micro's Stellaris product line allows for standardization that eliminates future architectural upgrades or software tool changes. Luminary Micro, Inc. 108 Wild Basin, Suite 350 Austin, TX 78746 Main: +1-512-279-8800 Fax: +1-512-279-8879 http://www.luminarymicro.com sales@luminarymicro.com C.4 Support Information For support on Luminary Micro products, contact: support@luminarymicro.com +1-512-279-8800, ext. 3 576 November 30, 2007 Preliminary Ordering and Contact Information Evaluation Board User Guide UG-146 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Evaluating the ADE7878 Energy Metering IC PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 36 FEATURES Evaluation board designed to be used with accompanying software to implement a fully functional 3-phase energy meter Easy connection of external transducers via screw terminals Easy modification of signal conditioning components using PCB sockets LED indicators on the CF1, CF2, CF3, IRQ0, and IRQ1 logic outputs Optically isolated metering components and USB-based communication with a PC External voltage reference option available for on-chip reference evaluation PC COM port-based firmware updates GENERAL DESCRIPTION The ADE7878 is a high accuracy, 3-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs. The ADE7878 incorporates seven ADCs, reference circuitry, and all signal processing required to perform total (fundamental and harmonic) active, reactive, and apparent energy measurement, fundamental active and reactive energy measurement, and rms calculations. This user guide describes the ADE7878 evaluation kit hardware, firmware, and software functionality. The evaluation board contains an ADE7878 and a LPC2368 microcontroller (from NXP Semiconductors). The ADE7878 and its associated metering components are optically isolated from the microcontroller. The microcontroller communicates with the PC using a USB interface. Firmware updates can be loaded using one PC com port and a regular serial cable. The ADE7878 evaluation board and this user guide, together with the ADE7878 data sheet, provide a complete evaluation platform for the ADE7878. The evaluation board has been designed so that the ADE7878 can be evaluated in an energy meter. Using appropriate current transducers, the evaluation board can be connected to a test bench or high voltage (240 V rms) test circuit. On-board resistor divider networks provide the attenuation for the line voltages. This user guide describes how the current transducers should be connected for the best performance. The evaluation board requires two external 3.3 V power supplies and the appropriate current transducers. EVALUATION BOARD CONNECTION DIAGRAM ADE78xxP1P2P3P4P5P6P7P8P9IAPIANIBPIBNICPICNINPINNGNDVNGNDVCPGNDVBPGNDVAPGNDVDDFILTERNETWORKFILTER NETWORKAND ATTENUATIONADR280OPTIONAL EXTERNAL1.2V REFERENCEOPTIONALEXTERNALCLOCK INDIGITALISOLATORSLPC2368P10GND2VDD2P12MCU_GNDMCU_VDDUSB PORTJ2J3J4CF3CF2CF1P13JTAGINTERFACEP15CONNECTOR TOPC COM PORT09078-001 Figure 1. UG-146 Evaluation Board User Guide Rev. 0 | Page 2 of 36 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Evaluation Board Connection Diagram ........................................ 1 Revision History ............................................................................... 2 Evaluation Board Hardware ............................................................ 3 Power Supplies .............................................................................. 3 Analog Inputs (P1 to P4 and P5 to P8) ...................................... 3 Setting Up the Evaluation Board as an Energy Meter ............. 6 Evaluation Board Software .............................................................. 8 Installing and Uninstalling the ADE7878 Software ................. 8 Front Panel .................................................................................... 8 PSM0 Mode—Normal Power Mode .......................................... 9 PSM1 Mode ................................................................................. 17 PSM2 Mode ................................................................................. 17 PSM3 Mode ................................................................................. 18 Managing the Communication Protocol Between the Microcontroller and the ADE7878 .............................................. 19 Acquiring HSDC Data Continuously ...................................... 21 Starting the ADE7878 DSP ....................................................... 22 Stopping the ADE7878 DSP ..................................................... 22 Upgrading Microcontroller Firmware ......................................... 23 Control Registers Data File ....................................................... 23 Evaluation Board Schematics and Layout ................................... 25 Schematic..................................................................................... 25 Layout .......................................................................................... 32 Ordering Information .................................................................... 34 Bill of Materials ........................................................................... 34 REVISION HISTORY 8/10—Revision 0: Initial Version Evaluation Board User Guide UG-146 Rev. 0 | Page 3 of 36 EVALUATION BOARD HARDWARE POWER SUPPLIES The evaluation board has three power domains: one that supplies the microcontroller and one side of the isocouplers, one that supplies the other side of the optocouplers, and one that supplies the ADE7878. The ground of the microcontroller’s power domain is connected to the ground of the PC through the USB cable. The ground of the ADE7878 power domain is determined by the ground of the phase voltages, VAP, VBP, VCP, and VN, and must be different from the ground of the micro-controller’s power domain. The microcontroller 3.3 V supply is provided at the P12 connector. The ADE7878 3.3 V supply is provided at the P9 connector. Close jumper JP2 to ensure that the same 3.3 V supply from ADE7878 is also provided at the isocouplers. ANALOG INPUTS (P1 TO P4 AND P5 TO P8) Current and voltage signals are connected at the screw terminal, P1 to P4 and P5 to P8, respectively. All analog input signals are filtered using the on-board antialiasing filters before the signals are connected to the ADE7878. The components used on the board are the recommended values to be used with the ADE7878. Current Sense Inputs (P1, P2, P3, and P4) The ADE7878 measures three phase currents and the neutral current. Current transformers or Rogowski coils can be used to sense the current but should not be mixed together. The ADE7878 contains different internal PGA gains on phase currents and on the neutral current; therefore, sensors with different ratios can be used. The only requirement is to have the same scale signals at the PGA outputs; otherwise, the mismatch functionality of the ADE7878 is compromised (see the ADE7878 data sheet for more details about neutral current mismatch). Figure 2 shows the structure used for the Phase A current; the sensor outputs are connected to the P1 connector. The R1 and R2 resistors are the burden resistors and, by default, they are not populated. They can also be disabled using the JP1A and JP2A jumpers. The R9/C9 and R10/C10 RC networks are used in conjunction with Rogowski coils. They can be disabled using the JP3A and JP4A jumpers. The R17/C17 and R18/C18 RC networks are the antialiasing filters. The default corner frequency of these low pass filters is 7.2 kHz (1 kΩ/22 nF). These filters can easily be adjusted by replacing the components on the evaluation board. All the other current channels (that is, Phase B, Phase C, and the neutral current) have a similar input structure. Using a Current Transformer as the Current Sensor Figure 3 shows how a current transformer can be used as a current sensor in one phase of a 3-phase, 4-wire distribution system (Phase A). The other two phases and the neutral current require similar connections. P1IAPIANJP1AJP2AR1R2R17R10R18100Ω1kΩ100Ω1kΩC922,000pFC1022,000pFC1722,000pFC1822,000pFR9JP4AJP5AJP3AJP6AIAPIANADE78xxTP1TP209078-002 Figure 2. Phase A Current Input Structure on the Evaluation Board IMAX = 6A rmsCT1:2000P1JP1AJP2AR150ΩR250ΩR17R10R18100Ω1kΩ100Ω1kΩC922,000pFC1022,000pFC1722,000pFC1822,000pFR9JP4AJP5AJP3AJP6AIAPIANADE78xxTP1TP209078-003 Figure 3. Example of a Current Transformer Connection The R1 and R2 burden resistors must be defined as functions of the current transformer ratio and maximum current of the system, using the following formula: R1 = R2 = 1/2 × 0.5/sqrt(2) × N/IFS where: 0.5/sqrt(2) is the rms value of the full-scale voltage accepted at the ADC input. N is the input-to-output ratio of the current transformer. IFS is the maximum rms current to be measured. The JP1A and JP2A jumpers should be opened if R1 and R2 are used. The antialiasing filters should be enabled by opening the J5A and J6A jumpers (see Figure 3). The secondary current of the transformer is converted to a voltage by using a burden resistor across the secondary winding outputs. Care should be taken when using a current transformer as the current sensor. If the secondary is left open (that is, no burden is connected), a large voltage may be present at the secondary outputs. This can cause an electric shock hazard and potentially damage electronic components. Most current transformers introduce a phase shift that the manufacturer indicates in the data sheet. This phase shift can lead to significant energy measurement errors, especially at low power factors. The ADE7878 can correct the phase error using the APHCAL[9:0], BPHCAL[9:0], and CPHCAL[9:0] phase calibration registers as long as the error stays between −6.732° and +1.107° at 50 Hz (see the ADE7878 data sheet for more UG-146 Evaluation Board User Guide Rev. 0 | Page 4 of 36 details). The software supplied with the ADE7878 evaluation board allows user adjustment of phase calibration registers. For this particular example, burden resistors of 50 Ω signify an input current of 7.05 A rms at the ADE7878 ADC full-scale input (0.5 V). In addition, the PGA gains for the current channel must be set at 1. For more information about setting PGA gains, see the ADE7878 data sheet. The evaluation software allows the user to configure the current channel gain. Using a Rogowski Coil as the Current Sensor Figure 4 shows how a Rogowski coil can be used as a current sensor in one phase of a 3-phase, 4-wire distribution system (Phase A). The other two phases and the neutral current require similar connections. The Rogowski coil does not require any burden resistors; therefore, R1 and R2 should not be populated. The antialiasing filters should be enabled by opening the J5A and J6A jumpers. To account for the high frequency noise introduced by the coil, an additional antialiasing filter must be introduced by opening the JP3A and JP4A jumpers. Then, to compensate for the 20 dB/dec gain introduced by the di/dt sensor, the integrator of the ADE7878 must be enabled by setting Bit 0 (INTEN) of the CONFIG register. The integrator has a −20 dB/dec attenuation and an approximately −90° phase shift and, when combined with the di/dt sensor, results in a magnitude and phase response with a flat gain over the frequency band of interest. ROGOWSKICOILP1JP1AJP2AR1R2R17R10R18100Ω1kΩ100Ω1kΩC922,000pFC1022,000pFC1722,000pFC1822,000pFR9JP4AJP5AJP3AJP6AIAPIANADE78xxTP1TP209078-004 Figure 4. Example of a Rogowski Coil Connection Voltage Sense Inputs (P5, P6, P7, and P8 Connectors) The voltage input connections on the ADE7878 evaluation board can be directly connected to the line voltage sources. The line voltages are attenuated using a simple resistor divider network before they are supplied to the ADE7878. The attenuation network on the voltage channels is designed so that the corner frequency (3 dB frequency) of the network matches that of the antialiasing filters in the current channel inputs. This prevents the occurrence of large energy errors at low power factors. Figure 5 shows a typical connection of the Phase A voltage inputs; the resistor divider is enabled by opening the JP7A jumper. The antialiasing filter on the VN data path is enabled by opening the JP7N jumper. JP8A and JP8N are also opened. The VN analog input is connected to AGND via the R25/C25 antialiasing filter using the JP8N connector. The attenuation networks can be easily modified by the user to accommodate any input level. However, the value of R32 (1 kΩ), should be modified only together with the corresponding resistors in the current channel (R17 and R18 on the Phase A current data path). P8JP8AVAPVNR291MΩ100kΩR321kΩC3222,000pFC2522,000pFR26JP7AVAPADE78xxTP12JP9AVNPHASE ANEUTRALP5JP8N1kΩR25JP7NVNTP9ACOMB12309078-005 Figure 5. Phase A Voltage Input Structure on the Evaluation Board The maximum signal level permissible at the VAP, VBP, and VCP pins of the ADE7878 is 0.5 V peak. Although the ADE7878 analog inputs can withstand ±2 V without risk of permanent damage, the signal range should not exceed ±0.5 V with respect to AGND for a specified operation. Evaluation Board User Guide UG-146 Rev. 0 | Page 5 of 36 Table 1. Recommended Settings for Evaluation Board Connectors Jumper Option Description JP1 Soldered Connects AGND to ground. By default, it is soldered. JP1A, JP1B, JP1C, JP1N, Open Connect IAP, IBP, IC, and INP to AGND. By default, they are open. JP2 Closed Connects the ADE7878 VDD power supply (VDD_F at the P9 connector) to the power supply of the isocouplers (VDD2 at the P10 connector). By default, it is closed. JP2A, JP2B, JP2C, JP2N Open Connect IAN, IBN, ICN, and INN to AGND. By default, they are open. JP3 Unsoldered Connects the pad metal below the ADE7878 to AGND. By default, it is unsoldered. JP3A, JP3B, JP3C, JP3N Closed Disable the phase compensation network in the IAP, IBP, ICP, and INP data path. By default, they are closed. JP4 Soldered Connects C3 to DVDD. By default, it is soldered. JP4A, JP4B, JP4C, JP4N Closed Disable the phase compensation network in the IAN, IBN, ICN, and INN data path. By default, they are closed. JP5 Soldered Connects C5 to AVDD. By default, it is soldered. JP5A, JP5B, JP5C, JP5N Open Disable the phase antialiasing filter in the IAP, IBP, ICP, and INP data path. By default, they are open. JP6 Soldered Connects C41 to the REF pin of the ADE7878. By default, it is soldered. JP6A, JP6B, JP6C, JP6N Open Disable the phase antialiasing filter in the IAN, IBN, ICN, and INN data path. By default, they are open. JP7 Closed Enables the supply to the microcontroller. When open, takes out the supply to the microcontroller. By default, it is closed. JP7A, JP7B, JP7C Open Disable the resistor divider in the VAP, VBP, and VCP data path. By default, they are open. JP7N Open Disables the antialiasing filter in the VN data path. By default, it is open. JP8 Open Sets the microcontroller in flash memory programming mode. By default, it is open. JP8A, JP8B, JP8C Open Connect VAP, VBP, and VCP to AGND. By default, they are open. JP8N Closed Connects VN to AGND. By default, it is closed. JP9 Open When closed, signals the microcontroller to declare all I/O pins as outputs. It is used when another microcontroller is used to manage the ADE7878 through the P38 socket. By default, it is open. JP9A, JP9B, JP9C Soldered to Pin 1 (AGND) Connect the ground of antialiasing filters in the VAP, VB, and VCP data path to AGND or VN. By default, they are soldered to AGND. JP10 Open Connects the external voltage reference to ADE7878. By default, it is open. JP11 Soldered to Pin 1 Connects the CLKIN pin of the ADE7878 to a 16,384 MHz crystal (Pin 1 of JP11) or to an external clock input provided at J1. By default, it is soldered to Pin 1. JP12 Soldered to Pin 3 (AGND) Connects DGND (Pin 2 of JP12) of the ADE7878 to ground (Pin 1 of JP12) or to AGND (Pin 3 of JP12). JP35, JP33 Open If I2C communication between the NXP LPC2368 and the ADE7878 is used, these connectors should be closed with 0 Ω resistors, and the JP36 and JP34 connectors should be opened. By default, the SPI is the communication used between the NXP LPC2368 and the ADE7878; therefore, these connectors are open. JP31, JP37 Open If HSDC communication is used, these connectors should be closed with 0 Ω resistors, and the JP35 and JP33 connectors should also be closed. By default, the SPI is the communication used between the NXP LPC2368 and the ADE7878; therefore, these connectors are open. JP36, JP34, JP32, JP38 Closed with 0 Ω resistors If SPI communication is used between the NXP LPC2368 and the ADE7878, these connectors should be closed and JP35, JP33, JP31, and JP37 should be opened. By default, the SPI is the communication used between the NXP LPC2368 and the ADE7878; therefore, these connectors are closed. UG-146 Evaluation Board User Guide Rev. 0 | Page 6 of 36 SETTING UP THE EVALUATION BOARD AS AN ENERGY METER Figure 6 shows a typical setup for the ADE7878 evaluation board. In this example, an energy meter for a 4-wire, 3-phase distribution system is shown. Current transformers are used to sense the phase and neutral currents and are connected as shown in Figure 6. The line voltages are connected directly to the evaluation board as shown. Note that the state of all jumpers must match the states shown in Figure 6, keeping in mind that the board is supplied from two different 3.3 V power supplies, one for the ADE7878 domain, VDD, and one for the NXP LPC2368 domain, MCU_VDD. Because the two domains are isolated to ensure that there is no electrical connection between the high voltage test circuit and the control circuit, the power supplies should have floating voltage outputs. The evaluation board is connected to the PC using a regular USB cable supplied with the board. When the evaluation board is powered up and connected to the PC, the enumeration process begins and the PC recognizes new hardware and asks to install the appropriate driver. The drive can be found in the VirCOM_ Driver_XP folder of the CD. After the driver is installed, the supplied evaluation software can be launched. The next section describes the ADE7878 evaluation software in detail and how it can be installed and uninstalled. Activating Serial Communication Between the ADE7878 and the NXP LPC2368 The ADE7878 evaluation board is supplied with communica-tion between the ADE7878 and the NXP LPC2368 that is set through the SPI ports. The JP32, JP34, JP36, and JP38 jumpers are closed using 0 Ω resistors, and the JP31, JP33, JP35, and JP37 jumpers are open. The SPI port should be chosen as the active port in the ADE7878 control panel. Communication between the ADE7878 and the NXP LPC2368 is also possible using the I2C ports. To accomplish this, the JP31, JP33, JP35, and JP37 jumpers should be closed using 0 Ω resistors, and the JP32, JP34, JP36, and JP38 jumpers should be open. In this case, the I2C port should be chosen as the active port in the ADE7878 control panel (see Table 2). Table 2. Jumper State to Activate SPI or I2C Communication Active Communication Jumpers Closed with 0 Ω Resistors Jumpers Open SPI (Default) JP32, JP34, JP36, JP38 JP31, JP33, JP35, JP37 I2C JP31, JP33, JP35, JP37 JP32, JP34, JP36, JP38 Using the Evaluation Board with Another Microcontroller It is possible to manage the ADE7878 mounted on the evalua-tion board with a different microcontroller mounted on another board. The ADE7878 can be connected to this second board through one of two connectors: P11 or P38. P11 is placed on the same power domain as the ADE7878. P38 is placed on the power domain of the NXP LPC2368 and communicates with the ADE7878 through the isocouplers. If P11 is used, the power domain of the NXP LPC2368 should not be supplied at P12. If P38 is used, a conflict may arise with the NXP LPC2368 I/O ports. The following two options are provided to deal with this situation: • One option is to keep the NXP LPC2368 running and close JP9. This tells the NXP LPC2368 to set all of its I/Os high to allow the other microcontroller to communicate with the ADE7878. After JP9 is closed, the S2 reset button should be pressed low to force the NXP LPC2368 to reset. This is necessary because the state of JP9 is checked inside the NXP LPC2368 program only once after reset. • The other option is to cut the power supply of the NXP LPC2368 by disconnecting JP7. Evaluation Board User Guide UG-146 Rev. 0 | Page 7 of 36 P1IAPIANIAPIANVAPVOLTAGE SOURCEGNDP9VDDJP1A, JP2A = OPENJP3A, JP4A = CLOSEDJP5A, JP6A = OPENNEUTRALPHASE BPHASE CLOADNEUTRALVOLTAGE SOURCEMCU_GNDP12MCU_VDDJP1, JP2 = CLOSEDR1R2P2IBPIBNIBPIBNJP1B, JP2B = OPENJP3B, JP4B = CLOSEDJP5B, JP6B = OPENR3R4P3ICPICNICPICNJP1C, JP2C = OPENJP3C, JP4C = CLOSEDJP5C, JP6C = OPENR5R6P4INPINNINPINNJP1N, JP2N = OPENJP3N, JP4N = CLOSEDJP5N, JP6N = OPENJP7A, JP8A = OPENR7R8P8VAPR26R29R32C32VBPJP7B, JP8B = OPENP7VBPR27R30R33C33VCPJP7C, JP8C = OPENJP7N = OPENJP8N = CLOSEDP6VCPR28R31R34C34C34VNP5VNR2509078-006 Figure 6. Typical Setup for the ADE7878 Evaluation Board UG-146 Evaluation Board User Guide Rev. 0 | Page 8 of 36 EVALUATION BOARD SOFTWARE The ADE7878 evaluation board is supported by Windows® based software that allows the user to access all the functionality of the ADE7878. The software communicates with the NXP LPC2368 microcontroller using the USB as a virtual COM port. The NXP LPC2368 communicates with the ADE7878 to process the requests that are sent from the PC. INSTALLING AND UNINSTALLING THE ADE7878 SOFTWARE The ADE7878 software is supplied on one CD-ROM. It contains two projects: one that represents the NXP LPC2368 project and one LabVIEW™ based program that runs on the PC. The NXP LPC2368 project is already loaded into the processor, but the LabVIEW based program must be installed. 1. To install the ADE7878 software, place the CD-ROM in the CD-ROM reader and double-click LabView_project\installation_files\setup.exe. This launches the setup program that automatically installs all the software components, including the uninstall program, and creates the required directories. 2. To launch the software, go to the Start/Programs/ ADE7878 Eval Software menu and click ADE7878 Eval Software. Both the ADE7878 evaluation software program and the NI run-time engine are easily uninstalled by using the Add/ Remove Programs option in the control panel. 1. Before installing a new version of the ADE7878 evaluation software, first uninstall the previous version. 2. Select the Add/Remove Programs option in the Windows control panel. 3. Select the program to uninstall and click the Add/Remove button. FRONT PANEL When the software is launched, the Front Panel is opened. This panel contains three areas: the main menu at the left, the sub- menu at the right, and a box that displays the name of the communication port used by the PC to connect to the evaluation port, also at the right (see Figure 7). The COM port used to connect the PC with the evaluation board must be selected first. The program displays a list of the active COM ports, allowing you to select the right one. To learn what COM port is used by the evaluation board, launch the Windows Device Manager (the devmgmt.msc file) in the Run window on the Windows Start menu. By default, the program offers the option of searching for the COM port. Serial communication between the microcontroller and the ADE7878 is introduced using a switch. By default, the SPI port is used. Note that the active serial port must first be set in the hardware. See the Activating Serial Communication Between the ADE7878 and the NXP LPC2368 section for details on how to set it up. The main menu has only one choice, other than Exit, enabled, Find COM Port. Clicking it starts a process in which the PC tries to connect to the evaluation board using the port indicated in the Start menu. It uses the echo function of the communica- tion protocol (see the Managing the Communication Protocol Between the Microcontroller and the ADE7878 section). It displays the port that matches the protocol and then sets it to 115,200 baud, eight data bits, no parity, no flow control, one stop bit. 09078-007 Figure 7. Front Panel of ADE7878 Software If the evaluation board is not connected, the port is displayed as XXXXX. In this case, the evaluation software is still accessible, but no communication can be executed. In both cases, whether the search for the COM port is successful or not, the cursor is positioned back at Please select from the following options in the main menu, Find COM Port is grayed out, and the next main menu options are enabled (see Figure 8). These options allow you to command the ADE7878 in either the PSM0 or PSM3 power mode. The other power modes, PSM1 and PSM2, are not available because initializations have to be made in PSM0 before the ADE7878 can be used in one of these other modes. Evaluation Board User Guide UG-146 Rev. 0 | Page 9 of 36 09078-008 Figure 8. Front Panel After the COM Port Is Identified PSM0 MODE—NORMAL POWER MODE Enter PSM0 Mode When the evaluation board is powered up, the ADE7878 is in PSM3 sleep mode. When Enter PSM0 mode is selected, the microcontroller manipulates the PM0 and PM1 pins of the ADE7878 to switch it into PSM0 mode. It waits 50 ms for the circuit to power up and, if SPI communication is activated on the board, it executes three SPI write operations to Address 0xEBFF of the ADE7878 to activate the SPI port. If the operation has been correctly executed or I2C communi-cation is used, the message Configuring LPC2368 – ADE7878 communication was successful is displayed, and you must click OK to continue. The only error that may occur during this operation is communication related; if this happens, the following message is displayed: Configuring LPC2368 – ADE7878 communication was not successful. Please check the communication between the PC and ADE7878 evaluation board and between LPC2368 and ADE78xx. Bit 1 (I2C_LOCK) of the CONFIG2[7:0] register is now set to 1 to lock in the serial port choice. Then the DICOEFF register is initialized with 0xFF8000, and the DSP of the ADE7878 is started when the software program writes RUN = 0x1. At the end of this process, the entire main menu is grayed out, and the submenu is enabled. You can now manage all functionality of the ADE7878 in PSM0 mode. To switch the ADE7878 to another power mode, click the Exit button on the submenu. The state of the Front Panel is shown in Figure 9. 09078-009 Figure 9. Front Panel After the ADE7878 Enters PSM0 Mode Reset ADE7878 When Reset ADE78xx is selected on the Front Panel, the RESET pin of the ADE7878 is kept low for 20 ms and then is set high. If the operation is correctly executed, the message ADE7878 was reset successfully is displayed, and you must click OK to continue. The only error that may occur during this operation is communication related; if this happens, the following message is displayed: The communication between PC and ADE7878 evaluation board or between LPC2368 and ADE78xx did not function correctly. There is no guarantee the reset of ADE7878 has been performed. Configure Communication When Configure Communication is selected on the Front Panel, the panel shown in Figure 10 is opened. This panel is useful if an ADE7878 reset has been performed and the SPI is no longer the active serial port. Select the SPI port by clicking the I2C/SPI Selector button and then click OK to update the selection and lock the port. If the port selection is successful, the message, Configuring LPC2368 – ADE7878 communica-tion was successful, is displayed, and you must click OK to continue. If a communication error occurs, the message, Configuring LPC2368 – ADE7878 communication was not successful. Please check the communication between the PC and ADE7878 evaluation board, is displayed. UG-146 Evaluation Board User Guide Rev. 0 | Page 10 of 36 09078-010 Figure 10. Configure Communication Panel The CONFIG2[7:0] register is written with Bit 1 (I2C_LOCK) set to 1 so that you do not need to remember to set it once the communication is set. The contents of CONFIG2[7:0] are then read back and displayed with Bit 1 (I2C_LOCK). To close the panel, click the Exit button; the cursor is positioned at Please select from the following options in the submenu of the Front Panel. Total Active Power When Total Active Power is selected on the Front Panel, the panel shown in Figure 11 is opened. The screen has an upper half and a lower half: the lower half shows the total active power data path of one phase, and the upper half shows bits, registers, and commands necessary to power management. 09078-011 Figure 11. Total Active Power Panel The Active Data Path button manages which data path is shown in the bottom half. Some registers or bits, like the WTHR0[23:0] register or Bit 0 (INTEN) of the CONFIG[15:0] register, are common to all data paths, independent of the phase shown. When these registers are updated, all the values in all data paths are updated. The HPFDIS[23:0] register is included twice in the data path, but only the register value from the current data path is written into the ADE7878. All the other instances take this value directly. 1. Click the Read Configuration button to cause all registers that manage the total active power to be read and displayed. Registers from the inactive data paths are also read and updated. 2. Click the Write Configuration button to cause all registers that manage the total active power to be written into the ADE7878. Registers from the inactive data paths are also written. The ADE78xx status box shows the power mode that the ADE7878 is in (it should always be PSM0 in this window), the active serial port (it should always be SPI), and the CHECKSUM[31:0] register. After every read and write operation, the CHECKSUM[31:0] register is read and its contents displayed. 3. Click the CFx Configuration button to open a new panel (see Figure 12). This panel gives access to all bits and registers that configure the CF1, CF2, and CF3 outputs of the ADE7878. The Read Setup and Write Setup buttons update and display the CF1, CF2, and CF3 output values. 09078-012 Figure 12. CFx Configuration Panel Like the Total Active Power panel, the CHECKSUM[31:0] register is read back whenever a read or write operation is executed in the CFx Configuration panel. To select more than one option for a TERMSELx bit in the COMPMODE [15:0] register, press the CTRL key while clicking the options you want. Clicking the Exit button closes the panel and redisplays the Total Active Power panel. When the Read Energy Registers button in the Total Active Power panel is clicked, a new panel is opened (see Figure 13). This panel gives access to bits and registers that configure the energy accumulation. The Read Setup and Write Setup buttons update and display the bit and register values. Evaluation Board User Guide UG-146 Rev. 0 | Page 11 of 36 The CHECKSUM[31:0] register is read back whenever a read or write operation is executed in the Read Energy Registers panel. Clicking the Read all energy registers button causes all energy registers to be read immediately, without regard to the modes in which they function. 09078-013 Figure 13. Read Energy Registers Panel The panel also gives the choice of reading the energy registers synchronous to CFx interrupts (pulses) or using line cycle accumulation mode. When the Read energy registers synchronous with CF1 pulses button is clicked, the following happens: 1. The STATUS0[31:0] register is read and then written back to so that all nonzero interrupt flag bits are cancelled. 2. Bit 14 (CF1) in the MASK0[31:0] register is set to 1, and the interrupt protocol is started (see the Managing the Communication Protocol Between the Microcontroller and the ADE7878 section for protocol details). 3. The microcontroller then waits until the IRQ0 pin goes low. If the wait is longer than the timeout you indicate in 3 sec increments, the following error message is displayed: No CF1 pulse was generated. Verify all the settings before attempting to read energy registers in this mode! 4. When the IRQ0 pin goes low, the STATUS0[31:0] register is read and written back to cancel Bit 14 (CF1); then the energy registers involved in the CF1 signal are read and their contents are displayed. A timer in 10 ms increments can be used to measure the reaction time after the IRQ0 pin goes low. 5. The operation is repeated until the button is clicked again. The process is similar when the other CF2, CF3, and line accum-ulation (Read Energy Registers panel) buttons are clicked. It is recommended to always use a timeout when dealing with interrupts. By default, the timeout is set to 10 (indicating a 30 sec timeout), and the timer is set to 0 (indicating that the STATUSx[31:0] and energy registers are read immediately after the IRQ0 pin goes low). When clicked on the Front Panel, the Total Reactive Power, Fundamental Active Power, and Fundamental Reactive Power buttons open panels that are very similar to the Total Active Power panel. These panels are shown in Figure 14, Figure 15, and Figure 16. 09078-014 Figure 14. Total Reactive Power Panel 09078-015 Figure 15. Fundamental Active Power Panel 09078-016 Figure 16. Fundamental Reactive Power Panel UG-146 Evaluation Board User Guide Rev. 0 | Page 12 of 36 Apparent Power When Apparent Power is selected on the Front Panel, a new panel is opened (see Figure 17). Similar to the other panels that deal with power measurement, this panel is divided into two parts: the lower half shows the apparent power data path of one phase and the ADE7878 status; the upper half shows the bits, registers, and commands necessary to power management. 09078-017 Figure 17. Apparent Power Panel Current RMS When RMS Current is selected on the Front Panel, a new panel is opened (see Figure 18). All data paths of all phases are available. 09078-018 Figure 18. Current RMS panel Clicking the Read Setup button causes a read of all registers shown in the panel. Clicking the Write Setup button causes writes to the xIRMSOS[23:0] registers. You can use the Start Digital Signal Processor and Stop Digital Signal Processor buttons to manage the Run[15:0] register and the Read xIRMS registers button, which uses the ZXIA, ZXIB, and ZXIC interrupts at the IRQ1 pin, to read the xIRMS[23:0]registers 500 consecutive times and then compute and display their average. If no interrupt occurs for the time indicated by the timeout (in 3 sec increments), the following message is displayed: No ZXIA, ZXIB or ZXIC interrupt was generated. Verify at least one sinusoidal signal is provided between IAP-IAN, IBP-IBN or ICP-ICN pins. A delay can be introduced (in 10 ms increments) between the time the IRQ1 pin goes low and the moment the xIRMS registers are read. The operation is repeated until the button is clicked again. Mean Absolute Value Current When Mean Absolute Value Current is selected on the Front Panel, a new panel is opened (see Figure 19). When the Read xIMAV registers button is clicked, the xIMAV[19:0] registers are read 10 consecutive times, and their average is computed and displayed. After this operation, the button is returned to high automatically. The ADE7878 status is also displayed. 09078-019 Figure 19. Mean Absolute Value Current Panel Voltage RMS When RMS Voltage is selected on the Front Panel, the Voltage RMS panel is opened (see Figure 20). This panel is very similar to the Current RMS panel. Clicking the Read Setup button executes a read of the xVRMSOS[23:0] and xVRMS[23:0] registers. Clicking Write Setup writes the xVRMSOS[23:0] registers into the ADE7878. The Start Digital Signal Processor and Stop Digital Signal Processor buttons manage the Run[15:0] register. When the Read xVRMS registers button is clicked, the xVRMS[23:0] registers are read 500 consecutive times and the average is displayed. The operation is repeated until the button is clicked again. Note that the ZXVA, ZXVB, and ZXVC zero-crossing interrupts are not used in this case because they are disabled when the voltages go below 10% of full scale. This allows rms voltage registers to be read even when the phase voltages are very low. Evaluation Board User Guide UG-146 Rev. 0 | Page 13 of 36 09078-020 Figure 20. Voltage RMS Panel Power Quality The Power Quality panel is accessible from the Front Panel and is divided into two parts (see Figure 21). The lower part displays registers that manage the power quality measurement functions for the Active Measurement button in the upper part of the panel. The upper part also displays the ADE7878 status and the buttons that manage the measurements. When the READ CONFIGURATION button is clicked, all power quality registers (MASK1[31:0], STATUS1[31:0], PERIOD[15:0], MMODE[7:0], ISUM[27:0], OVLVL[23:0], OILVL[23:0], PHSTATUS[15:0], IPEAK[31:0], VPEAK[31:0], SAGLVL[23:0], SAGCYC[7:0], ANGLE0[15:0], ANGLE1[15:0], ANGLE2[15:0], COMPMODE[15:0], CHECKSUM[31:0], and PEAKCYC[7:0]) are read, and the ones belonging to the active panel are displayed. Based on the PERIOD[15:0] register, the line frequency is computed and displayed in the lower part of the panel, in Zero Crossing Measurements. Based on the ANGLEx[15:0] registers, cos(ANGLEx) is computed and displayed in the Time Intervals Between Phases panel that is accessible from the Active Measurement Zero Crossing dropdown box (see Figure 21). When the WRITE CONFIGURATION button is clicked, MMODE[7:0], OVLVL[23:0], OILVL[23:0], SAGLVL[23:0], SAGCYC[7:0], COMPMODE[15:0], and PEAKCYC[7:0] are written into the ADE7878, and CHECKSUM[31:0] is read back and displayed in the CHECKSUM[31:0] box at the top of the upper part of the panel. 09078-021 Figure 21. Power Quality Zero-Crossing Measurements Panel When the WAIT FOR INTERRUPTS button is clicked, the interrupts that you have enabled in the MASK1[31:0] register are monitored. When the IRQ1 pin goes low, the STATUS1[31:0] register is read and its bits are displayed. The ISUM[27:0], PHSTATUS[15:0], IPEAK[31:0], VPEAK[31:0], ANGLE0[15:0], ANGLE1[15:0], and ANGLE2[15:0] registers are also read and displayed. A timeout should be introduced in 3 sec increments to ensure that the program does not wait indefinitely for interrupts. A timer (in 10 ms increments) is provided to allow reading of the registers with a delay from the moment the interrupt is triggered. The Active Measurement Zero Crossing button gives access to the Zero Crossing, Neutral Current Mismatch, Overvoltage and Overcurrent Measurement, Peak Detection, and Time Intervals Between Phases panels (see Figure 21 through Figure 25). The line frequency is computed using the PERIOD[15:0] register, based on the following formula: ][000,256HzPeriodf= The cosine of the ANGLE0[15:0], ANGLE1[15:0], and ANGLE2[15:0] measurements is computed using the following formula: =000,256×360×)(fANGLExcosANGLExcos UG-146 Evaluation Board User Guide Rev. 0 | Page 14 of 36 09078-022 Figure 22. Neutral Current Mismatch Panel 09078-023 Figure 23. Overvoltage and Overcurrent Measurements Panel 09078-024 Figure 24. Peak Detection Panel 09078-025 Figure 25. Time Intervals Between Phases Panel Waveform Sampling The Waveform Sampling panel (see Figure 26) is accessible from the Front Panel and uses the HSDC port to acquire data from the ADE7878 and display it. It can be accessed only if the communication between the ADE7878 and the NXP LPC2368 is through the I2C. See the Activating Serial Communication Between the ADE7878 and the NXP LPC2368 section for details on how to set I2C communication on the ADE7878 evaluation board. 09078-026 Figure 26. Waveform Sampling Panel Evaluation Board User Guide UG-146 Rev. 0 | Page 15 of 36 The HSDC transmits data to the NXP LPC2368 at 4 MHz because this is the maximum speed at which the slave SPI of the NXP LPC2368 can receive data. The panel contains some switches that must be set before acquiring data. • One switch chooses the quantities that are displayed: phase currents and voltages or phase powers. For every set of quantities, only one can be acquired at a time. This choice is made using the Select Waveform button. • A second switch allows acquired data to be stored in files for further use. This switch is set with the ACQUIRE DATA button. • The acquisition time should also be set before an acquis-ition is ordered. By default, this time is 150 ms. It is unlimited for phase currents and voltages and for phase powers. The NXP LPC2368 executes in real time three tasks using the ping pong buffer method: continuously receiving data from HSDC, storing the data into its USB memory, and sending the data to the PC. Transmitting seven phase currents and voltages at 4 MHz takes 103.25 μs (which is less than 125 μs); therefore, the HSDC update rate is 8 kHz (HSDC_CFG = 0x0F). Transmitting nine phase powers takes 72 μs (again, less than 125 μs); therefore, the HSDC update rate is also 8 kHz (HSDC_CGF = 0x11). To start the acquisition, click the ACQUIRE DATA button. The data is displayed on one plot. If you click the Write waveforms to file?/No writing to files switch to enable the writing of waveforms to a file, the program asks for the name and location of the files before storing the waveform. Checksum Register The Checksum Register panel is accessible from the Front Panel and gives access to all ADE7878 registers that are used to compute the CHECKSUM[31:0] register (see Figure 27). You can read/write the values of these registers by clicking the Read and Write buttons. The LabView program estimates the value of the CHECKSUM[31:0] register and displays it whenever one of the registers is changed. When the Read button is pressed, the registers are read and the CHECKSUM[31:0] register is read and its values displayed. This allows you to compare the value of the CHECKSUM[31:0] register estimated by LabView with the value read from the ADE7878. The values should always be identical. 09078-027 Figure 27. Checksum Register Panel All Registers Access The All Registers Access panel is accessible from the Front Panel and gives read/write access to all ADE7878 registers. Because there are many, the panel can scroll up and down and has multiple read, write, and exit buttons (see Figure 28 and Figure 29). The registers are listed in columns in alphabetical order, starting at the upper left. The panel also allows you to save all control registers into a data file by clicking the Save All Regs into a file button. By clicking the Load All Regs from a file button, you can load all control registers from a data file. Then, by clicking the Write All Regs button, you can load these values into the ADE7878. The order in which the registers are stored into a file is shown in the Control Registers Data File section. 09078-028 Figure 28. Panel Giving Access to All ADE7878 Registers (1) UG-146 Evaluation Board User Guide Rev. 0 | Page 16 of 36 09078-029 Figure 29. Panel Giving Access to All ADE7878 Registers (2) Quick Startup The Quick Startup panel is accessible from the Front Panel and can be used to rapidly initialize a 3-phase meter (see Figure 30). 09078-030 Figure 30. Panel Used to Quickly Set Up the 3-Phase Meter The meter constant (MC, in impulses/kWh), the nominal voltage (Un, in V rms units), the nominal current (In, in A rms units), and the nominal line frequency (fn, in either 50 Hz or 60 Hz) must be introduced in the panel controls. Then phase voltages and phase currents must be provided through the relative sensors. Clicking the Begin Computations button starts the program that reads rms voltages and currents and calculates the full-scale voltage and currents used to further initialize the meter. This process takes 7 sec as the program reads the rms voltages 100 times and the rms currents 100 times and then averages them (this is because the PC reads the rms values directly and cannot synchronize the readings with the zero crossings). The program then computes the full-scale voltages and currents and the constants that are important for setting up the ADE7878: nominal values (n), CFDEN, WTHR1, VARTHR1, VATHR1 and WTHR0, VARTHR0, and VATHR0. At this point, you can overwrite these values. You can also click the Update Registers button to cause the program to do the following: • Initialize the CFxDEN and xTHR registers • Enable the CF1 pin to provide a signal proportional to the total active power, the CF2 pin to provide a signal proportional to the total reactive power, and the CF3 pin to provide a signal proportional to the apparent power. Throughout the program, it is assumed that PGA gains are 1 (for simplicity) and that the Rogowski coil integrators are disabled. You can enter and modify the PGAs and enable the integrators before executing this quick startup if necessary. At this point, the evaluation board is set up as a 3-phase meter, and calibration can be executed. To store the register initializa-tions, click the Save All Regs into a file button in the All Registers Access panel. After the board is powered down and then powered up again, the registers can be loaded into the ADE7878 by simply loading back the content of the data file. To do this, click the Load All Regs from a file button in the All Registers Access panel. PSM2 Settings The PSM2 Settings panel, which is accessible from the Front Panel, gives access to the LPOILVL[7:0] register that is used to access PSM2 low power mode (see Figure 31). You can manipulate its LPOIL[2:0] and LPLINE[4:0] bits. The value shown in the LPOILVL[7:0] register is composed from these bits and then displayed. Note that you cannot write a value into the register by writing a value in the LPOILVL[7:0] register box. Evaluation Board User Guide UG-146 Rev. 0 | Page 17 of 36 09078-031 Figure 31. PSM2 Settings Panel PSM1 MODE Enter PSM1 Mode When Enter PSM1 mode is selected on the Front Panel, the microcontroller manipulates the PM0 and PM1 pins of the ADE7878 to switch the ADE7878 into PSM1 reduced power mode. Then, the submenu allows access only to the Mean Absolute Value Current function because this is the only ADE7878 functionality available in this reduced power mode (see Figure 32). 09078-032 Figure 32. Front Panel After the ADE7878 Enters PSM1 Mode Mean Absolute Value Current in PSM1 Mode The Mean Absolute Value Current panel, which is accessible from the Front Panel when Enter PSM1 mode is selected, is very similar to the panel accessible in PSM0 mode (see the Mean Absolute Value Current section for details). The only difference is that ADE7878 status does not show the CHECKSUM[31:0] register because it is not available in PSM1 mode (see Figure 33) 09078-033 Figure 33. Mean Absolute Value Currents Panel in PSM1 Mode PSM2 MODE Enter PSM2 Mode When Enter PSM2 mode is selected on the Front Panel, the microcontroller manipulates the PM0 and PM1 pins of the ADE7878 to switch the ADE7878 into PSM2 low power mode. Then the submenu allows access only to the Phase Current Monitoring function because this is the only ADE7878 functionality available in this low power mode. 09078-034 Figure 34. Front Panel After the ADE7878 Enters PSM2 Mode UG-146 Evaluation Board User Guide Rev. 0 | Page 18 of 36 Phase Current Monitoring The Phase Current Monitoring panel is accessible from the Front Panel when Enter PSM2 mode is selected; it allows you to display the state of the IRQ0and IRQ1 pins because, in PSM2 low power mode, the ADE7878 compares the phase currents against a threshold determined by the LPOILVL[7:0] register (see Figure 35). Clicking the READ STATUS OF IRQ0 AND IRQ1 PINS button reads the status of these pins and displays and interprets the status. This operation is managed by the LPOILVL[7:0] register and can be modified only in PSM0 mode. The panel offers this option by switching the ADE7878 into PSM0 mode and then back to PSM2 mode when one of the READ LPOILVL/WRITE LPOILVL buttons is clicked. To avoid toggling both the PM0 and PM1 pins at the same time during this switch, the ADE7878 is set to PSM3 when changing modes. 09078-035 Figure 35. Panel Managing Current Monitoring in PSM2 Mode PSM3 MODE Enter PSM3 Mode In PSM3 sleep mode, most of the internal circuits of the ADE7878 are turned off. Therefore, no submenu is activated while in this mode. You can click the Enter PSM0 mode, Enter PSM1 mode, or Enter PSM2 mode button to set the ADE7878 to one of these power modes. Evaluation Board User Guide UG-146 Rev. 0 | Page 19 of 36 MANAGING THE COMMUNICATION PROTOCOL BETWEEN THE MICROCONTROLLER AND THE ADE7878 In this section, the protocol commands are listed that have been implemented to manage the ADE7878 from the PC using the microcontroller. The microcontroller is a pure slave during the communication process. It receives a command from the PC, executes the command, and sends an answer to the PC. The PC should wait for the answer before sending a new command to the micro- controller. Table 3. Echo Command—Message from the PC to the Micro- controller Byte Description 0 A = 0x41 1 N = number of bytes transmitted after this byte 2 Data Byte N − 1 (MSB) 3 Data Byte N − 2 4 Data Byte N − 3 … … N Data Byte 1 N + 1 Data Byte 0 (LSB) Table 4. Echo Command—Answer from the Microcontroller to the PC Byte Description 0 R = 0x52 1 A = 0x41 2 N = number of bytes transmitted after this byte 3 Data byte N − 1 (MSB) 4 Data byte N − 2 … … N + 1 Data Byte 1 N + 2 Data Byte 0 (LB) Table 5. Power Mode Select—Message from the PC to the Microcontroller Byte Description 0 B = 0x42, change PSM mode 1 N = 1 2 Data Byte 0: 0x00 = PSM0 0x01 = PSM1 0x02 = PSM2 0x03 = PSM3 Table 6. Power Mode Select—Answer from the Microcon- troller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E, to acknowledge that the operation was successful Table 7. Reset—Message from the PC to the Microcontroller Byte Description 0 C = 0x43, toggle the RESET pin and keep it low for at least 10 ms 1 N = 1 2 Data Byte 0: this byte can have any value Table 8. Reset—Answer from the Microcontroller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E, to acknowledge that the operation was successful Table 9. I2C/SPI Select (Configure Communication)— Message from the PC to the Microcontroller Byte Description 0 D = 0x44, select I2C and SPI and initialize them; then set CONFIG2[7:0] = 0x2 to lock in the port choice. When I2C is selected, also enable SSP0 of the LPC2368 (used for HSDC). 1 N = 1. 2 Data Byte 0: 0x00 = I2C, 0x01 = SPI. Table 10. I2C/SPI Select (Configure Communication)— Answer from the Microcontroller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E, to acknowledge that the operation was successful Table 11. Data Write—Message from the PC to the Micro- controller Byte Description 0 E = 0x45. 1 N = number of bytes transmitted after this byte. N can be 1 + 2, 2 + 2, 4 + 2, or 6 + 2. 2 MSB of the address. 3 LSB of the address. 4 Data Byte N − 3 (MSN). 5 Data Byte N − 4. 6 Data Byte N − 5. … … N + 2 Data Byte 1. N + 3 Data Byte 0 (LSB). Table 12. Data Write—Answer from the Microcontroller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E, to acknowledge that the operation was successful UG-146 Evaluation Board User Guide Rev. 0 | Page 20 of 36 Table 13. Data Read—Message from the PC to the Micro- controller Byte Description 0 F = 0x46. 1 N = number of bytes transmitted after this byte; N = 3. 2 MSB of the address. 3 LSB of the address. 4 M = number of bytes to be read from the address above. M can be 1, 2, 4, or 6. Table 14. Data Read—Answer from the Microcontroller to the PC Byte Description 0 R = 0x52. 1 MSB of the address. 2 LSB of the address. 3 Byte 5, Byte 3, Byte 1, or Byte 0 (MSB) read at the location indicated by the address. The location may contain 6, 4, 2, or 1 byte. The content is transmitted MSB first. 4 Byte 4, Byte 2, or Byte 0. 5 Byte 3, Byte 1. 6 Byte 2, Byte 0. 7 Byte 1. 8 Byte 0. Table 15. Interrupt Setup—Message from the PC to the Microcontroller Byte Description 0 J = 0x4A. 1 N = 8, number of bytes transmitted after this byte. 2 MSB of the MASK1[31:0] or MASK0[31:0] register. 3 LSB of the MASK1[31:0] or MASK0[31:0] register. 4 Byte 3 of the desired value of the MASK0[31:0] or MASK1[31:0] register. 5 Byte 2. 6 Byte 1. 7 Byte 0. 8 Time out byte: time the MCU must wait for the interrupt to be triggered. It is measured in 3 sec increments. Time out byte (TOB) = 0 means that timeout is disabled. 9 IRQ timer: time the MCU leaves the IRQx pin low before writing back to clear the interrupt flag. It is measured in 10 ms increments. Timer = 0 means that timeout is disabled. Table 16. Interrupt Setup—Message from the Microcon- troller to the PC Byte Description 0 R = 0x52. 1 Byte 3 of the STATUS0[31:0] or STATUS1[31:0] register. If the program waited for TOB × 3 sec and the interrupt was not triggered, then Byte 3 = Byte 2 = Byte 1 = Byte 0 = 0xFF. 2 Byte 2 of the STATUS0[31:0] or STATUS1[31:0] register. 3 Byte 1 of the STATUS0[31:0] or STATUS1[31:0] register. 4 Byte 0 of the STATUS0[31:0] or STATUS1[31:0] register. The microcontroller executes the following operations once the interrupt setup command is received: 1. Reads the STATUS0[31:0] or STATUS1[31:0] register (depending on the address received from the PC) and, if it shows an interrupt already triggered (one of its bits is equal to 1), it erases the interrupt by writing it back. 2. Writes to the MASK0[31:0] or MASK1[31:0] register with the value received from the PC. 3. Waits for the interrupt to be triggered. If the wait is more than the timeout specified in the command, 0xFFFFFFFF is sent back. 4. If the interrupt is triggered, the STATUS0[31:0] or STATUS1[31:0] register is read and then written back to clear it. The value read at this point is the value sent back to the PC so that you can see the source of the interrupts. 5. Sends back the answer. Table 17. Interrupt Pins Status—Message from the PC to the Microcontroller Byte Description 0 H = 0x48. 1 N = 1, number of bytes transmitted after this byte. 2 Any byte. This value is not used by the program but it is used in the communication because N must not be equal to 0. Table 18. Interrupt Pins Status—Answer from the Micro- controller to the PC Byte Description 0 R = 0x52. 1 A number representing the status of the IRQ0 and IRQ1 pins. 0: IRQ0 = low, IRQ1 = low 1: IRQ0 = low, IRQ1 = high. 2: IRQ0 = high, IRQ1 = low. 3: IRQ0 = high, IRQ1 = high. The reason for the IRQ0 and IRQ1 order is that on the microcontroller IO port, IRQ0= P0.1 and IRQ1 = P0.0. Evaluation Board User Guide UG-146 Rev. 0 | Page 21 of 36 ACQUIRING HSDC DATA CONTINUOUSLY This function acquires data from the HSDC continuously for a defined time period and for up to two variables. The microcon-troller sends data in packages of 4 kB. Table 19 describes the protocol when two instantaneous phase currents or voltages are acquired. Table 19. Acquire HSDC Data Continuously—Message from the PC to the Microcontroller If Phase Currents and Voltages Are Acquired Byte Description 0 G = 0x47. 1 N = number of bytes transmitted after this byte. N = 32. 2 0: corresponds to Byte 3 of IA. Because this byte is only a sign extension of Byte 2, it is not sent back by the microcontroller. 3 Increment_IA_Byte2. If IA is to be acquired, Byte 3, Byte 4, and Byte 5 are 1. Otherwise, they are 0. 4 Increment_IA_Byte1. 5 Increment_IA_Byte2. 6 0. 7 Increment_VA_Byte2. If VA is to be acquired, Byte 7, Byte 8, and Byte 9 are 1. Otherwise, they are 0. 8 Increment_VA_Byte1. 9 Increment_VA_Byte0. 10 0. 11 Increment_IB_Byte2. If IB is to be acquired, Byte 11, Byte 12, and Byte 13 are 1. Otherwise, they are 0. 12 Increment_IB_Byte1. 13 Increment_IB_Byte0. 14 0. 15 Increment_VB_Byte2. If VB is to be acquired, Byte 15, Byte 16, and Byte 17 are 1. Otherwise, they are 0. 16 Increment_VB_Byte1. 17 Increment_VB_Byte0. 18 0. 19 Increment_IC_Byte2. If IC is to be acquired, Byte 19, Byte 20, and Byte 21 are 1. Otherwise, they are 0. 20 Increment_IC_Byte1. 21 Increment_IC_Byte0. 22 0. 23 Increment_VC_Byte2. If VC is to be acquired, Byte 23, Byte 24, and Byte 25 are 1. Otherwise, they are 0. 24 Increment_VC_Byte1. 25 Increment_VC_Byte0. 26 0. 27 Increment_IN_Byte2. If IN is to be acquired, Byte 27, Byte 28, and Byte 29 are 1. Otherwise, they are 0. 28 Increment_IN_Byte1. 29 Increment_IN_Byte0. 30 Byte 1 of M. M is a 16-bit number. The number of 32-bit samples acquired by the microcontroller is (2 × M + 1) × 67 per channel. 31 Byte 0 of M. If two of the phase powers are to be acquired, the protocol changes (see Table 20). Table 20. Acquire HSDC Data Continuously—Message from the PC to the Microcontroller If Phase Powers Are Acquired Byte Description 0 G = 0x47 1 N = number of bytes transmitted after this byte. N = 38. 2 0: corresponds to Byte 3 of AVA. Because this byte is only a sign extension of Byte 2, it is not sent back by the microcontroller. 3 Increment_AVA_Byte2. If AVA is to be acquired, Byte 3, Byte 4, and Byte 5 are 1. Otherwise, they are 0. 4 Increment_AVA_Byte1. 5 Increment_AVA_Byte2. 6 0. 7 Increment_BVA_Byte2. If BVA is to be acquired, Byte 7, Byte 8, and Byte 9 are 1. Otherwise, they are 0. 8 Increment_BVA_Byte1. 9 Increment_BVA_Byte0. 10 0. 11 Increment_CVA_Byte2. If CVA is to be acquired, Byte 11, Byte 12, and Byte 13 are 1. Otherwise, they are 0. 12 Increment_CVA_Byte1. 13 Increment_CVA_Byte0. 14 0. 15 Increment_AWATT_Byte2. If AWATT is to be acquired, Byte 15, Byte 16, and Byte 17 are 1. Otherwise, they are 0. 16 Increment_AWATT_Byte1. 17 Increment_AWATT_Byte0. 18 0. 19 Increment_BWATT_Byte2. If BWATT is to be acquired, then Byte 19, Byte 20, and Byte 21 are 1. Otherwise, they are 0. 20 Increment_BWATT_Byte1. 21 Increment_BWATT_Byte0. 22 0. 23 Increment_CWATT_Byte2. If CWATT is to be acquired, Byte 23, Byte 24, and Byte 25 are 1. Otherwise, they are 0. 24 Increment_CWATT_Byte1. 25 Increment_CWATT_Byte0. 26 0. 27 Increment_AVAR_Byte2. If AVAR is to be acquired, Byte 27, Byte 28, and Byte 29 are 1. Otherwise, they are 0. 28 Increment_AVAR_Byte1. 29 Increment_AVAR_Byte0. 30 0. 31 Increment_BVAR_Byte2. If BVAR is to be acquired, then Byte 31, Byte 32, and Byte 33 are 1. Otherwise, they are 0. 32 Increment_BVAR_Byte1. 33 Increment_BVAR_Byte0. 34 0. 35 Increment_CVAR_Byte2. If CVAR is to be acquired, Byte 35, Byte 36, and Byte 37 are 1. Otherwise, they are 0. UG-146 Evaluation Board User Guide Rev. 0 | Page 22 of 36 Byte Description 36 Increment_CVAR_Byte1. 37 Increment_CVAR_Byte0. 38 Byte 1 of M. M is a 16-bit number. The number of 32-bit samples acquired by the microcontroller is (2 × M + 1) × 67 per channel. 39 Byte 0 of M. After receiving the command, the microcontroller enables the HSDC port and acquires 67 × 7 × 4 = 1876 bytes into BUFFER0. As soon as BUFFER0 is filled, data is acquired in BUFFER1 (equal in size to BUFFER0), while 2 × 3 × 67 = 402 bytes (134 24-bit words) from BUFFER0 are transmitted to the PC. As soon as BUFFER1 is filled, data is acquired into BUFFER0 while 402 bytes from BUFFER1 are transmitted to the PC. Only the less significant 24 bits of every 32-bit instantaneous value are sent to the PC to decrease the size of the buffer sent to the PC. The most significant eight bits are only an extension of a 24-bit signed word; therefore, no information is lost. The protocol used by the microcontroller to send data to the PC is shown in Table 21. Table 21. Acquire HSDC Data Continuously—Answer from the Microcontroller to the PC Byte Description 0 R = 0x52 1 Byte 2 (MSB) of Word 1 2 Byte 1 of Word 1 3 Byte 0 (LSB) of Word 1 4 Byte 2 (MSB) of Word 2 5 Byte 1 (MSB) of Word 2 … … 402 Byte 0 (LSB) of Word 134 STARTING THE ADE7878 DSP This function orders the microcontroller to start the DSP. The microcontroller writes to the run register with 0x1. Table 22. Start ADE7878 DSP—Message from the PC to the Microcontroller Byte Description 0 N = 0x4E 1 N = number of bytes transmitted after this byte; N = 1 2 Any byte Table 23. Start ADE7878 DSP—Answer from the Micro-controller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E, to acknowledge that the operation was successful STOPPING THE ADE7878 DSP This function orders the microcontroller to stop the DSP. The microcontroller writes to the run register with 0x0. Table 24. Stop ADE7878 DSP—Message from the PC to the Microcontroller Byte Description 0 O = 0x4F 1 N = number of bytes transmitted after this byte; N = 1 2 Any byte Table 25. Stop ADE7878 DSP—Answer from the Micro-controller to the PC Byte Description 0 R = 0x52 1 ~ = 0x7E to acknowledge that the operation was successful Evaluation Board User Guide UG-146 Rev. 0 | Page 23 of 36 UPGRADING MICROCONTROLLER FIRMWARE Although the evaluation board is supplied with the microcontroller firmware already installed, the ADE7878 evaluation software CD provides the NXP LPC2368 microcontroller project developed under the IAR embedded workbench environment for ARM. Users in possession of this tool can modify the project at will and can download it using an IAR J-link debugger. As an alternative, the executable can be downloaded using a program called Flash Magic, available on the evaluation software CD or at the following website: http://www.flashmagictool.com/. Flash Magic uses the PC COM port to download the micro-controller firmware. The procedure for using Flash Magic is as follows: 1. Plug a serial cable into connector P15 of the ADE7878 evaluation board and into a PC COM port. As an alternative, use the ADE8052Z-DWDL1 ADE downloader from Analog Devices, Inc., together with a USB cable. 2. Launch the Device Manager under Windows XP by writing devmgmt.msc into the Start/Run box. This helps to identify which COM port is used by the serial cable. 3. Plug the USB2UART board into the P15 connector of the ADE7878 evaluation board with the VDD pin of the USB2UART aligned at Pin 1 of P15. 4. Connect Jumper JP8. The P2.10/EINT0 pin of the microcontroller is now connected to ground. 5. Supply the board with two 3.3 V supplies at the P10 and P12 connectors. 6. Press and release the reset button, S2, on the ADE7878 evaluation board. 7. Launch Flash Magic and do the following: a. Select a COM port (COMx as seen in the Device Manager). b. Set the baud rate to 115,200. c. Select the NXP LPC2368 device. d. Set the interface to none (ISP). e. Set the DOscillator frequency (MHz) to 12.0. f. Select Erase all Flash + Code Rd Block. g. Choose ADE7878_Eval_Board.hex from the \Debug\Exe project folder. h. Select Verify after programming. The Flash Magic settings are shown in Figure 36. 09078-036 Figure 36. Flash Magic Settings 8. Click Start to begin the download process. 9. After the process finishes, extract the JP8 jumper. 10. Reset the ADE7878 evaluation board by pressing and releasing the S2 reset button. At this point, the program should be functional, and a USB cable can be connected to the board. When the PC recognizes the evaluation board and asks for a driver, point it to the project \VirCOM_Driver_XP folder. The ADE7878_eval_board_ vircomport.inf file is the driver. CONTROL REGISTERS DATA FILE Table 26 shows the order in which the control registers of the ADE7878 are stored into a data file when you click the Save All Regs into a file button in the All Registers Access panel. UG-146 Evaluation Board User Guide Rev. 0 | Page 24 of 36 Table 26. Control Register Data File Content Line Number Register 1 AIGAIN 2 AVGAIN 3 BIGAIN 4 BVGAIN 5 CIGAIN 6 CVGAIN 7 NIGAIN 8 AIRMSOS 9 AVRMSOS 10 BIRMSOS 11 BVRMSOS 12 CIRMSOS 13 CVRMSOS 14 NIRMSOS 15 AVAGAIN 16 BVAGAIN 17 CVAGAIN 18 AWGAIN 19 AWATTOS 20 BWGAIN 21 BWATTOS 22 CWGAIN 23 CWATTOS 24 AVARGAIN 25 AVAROS 26 BVARGAIN 27 BVAROS 28 CVARGAIN 29 CVAROS 30 AFWGAIN 31 AFWATTOS 32 BFWGAIN 33 BFWATTOS 34 CFWGAIN 35 CFWATTOS 36 AFVARGAIN 37 AFVAROS 38 BFVARGAIN 39 BFVAROS 40 CFVARGAIN 41 CFVAROS Line Number Register 42 VATHR1 43 VATHR0 44 WTHR1 45 WTHR0 46 VARTHR1 47 VARTHR0 48 VANOLOAD 49 APNOLOAD 50 VARNOLOAD 51 VLEVEL 52 DICOEFF 53 HPFDIS 54 ISUMLVL 55 RUN 56 OILVL 57 OVLVL 58 SAGLVL 59 MASK0 60 MASK1 61 VNOM 62 LINECYC 63 ZXTOUT 64 COMPMODE 65 Gain 66 CFMODE 67 CF1DEN 68 CF2DEN 69 CF3DEN 70 APHCAL 71 BPHCAL 72 CPHCAL 73 CONFIG 74 MMODE 75 ACCMODE 76 LCYCMODE 77 PEAKCYC 78 SAGCYC 79 CFCYC 80 HSDC_CFG 81 LPOILVL 82 CONFIG2 Evaluation Board User Guide UG-146 Rev. 0 | Page 25 of 36 EVALUATION BOARD SCHEMATICS AND LAYOUT SCHEMATIC 09078-037NOTE:MOUNT JP? DIRECTLY BELOWPAD METAL. CONNECT TO PADWITH MULTIPLE VIAS.REPEAT VIA GRID TO AGND PLANEEXTRA GROUND TP FOR PROBINGOUTPUT LED CIRCUITIRQ1BCF1CF2IRQ0BCF3DEVICE INTERFACE HEADERREFERENCE DECOUPLING AND EXTERNAL REFRESONANT CIRCUIT. THIS OPTION SHOULD BE PLACED ASXTAL CKTBY DEFAULT SELECT OPTION A TO COMPLETE PARALLELCLOSE TO DEVICE AS POSSIBLE.C27C26C25C6C4NPC41NPC5NPC321C38C43C42C40C7C2NPC8NPC1NPC44ACCR5ACCR4ACCR3ACCR2ACCR1RSBR43R42R41R40R3921E8NR69R84R85R70R68231JP12R35R361TP293421S121JP321JP421JP521JP621JP101TP49231A11TP511TP501TP341TP361TP381TP371TP391TP351TP331TP321TP311TP301TP281TP271TP261TP251TP241TP231TP2221JP221P10R371TP151TP141TP139876543231303292827262524232221202191817161514131211101P111826192223393641732PAD3837322915161314912785628273534332425U1213Q5213Q2213Q4213Q3213Q121JP121P9R381TP921P521JP7NR2521JP8N54321CLKIN21Y1231JP11DGND_DCLKOUTIRQ0B20PF20PF3PIN_SOLDER_JUMPERBLKCLKINAMP227699-2BLK1.0UFIBP10KCF2CMD28-21VGCTR8T1BLKVDD_FBLKVDD_F10UFVDD0.1UF0.1UF0.1UFBLKBLKBLKVDD2VDD0BLKJPR04021500 OHMSVNBERG69157-1021KBERG69157-102BLKBLKREFEXT_CLKINBLKBLKBLKBLKCF1SSB/HSAMOSI/SDACF3/HSCLKIRQ0B16.384MHZIRQ1BPM0PM1RESETBCLKOUTEXT_CLKINSAMTSW-1-30-08-GDSCLK/SCLCF2MISO/HSDFDV302P10KCF3/HSCLKFDV302PFDV302P10KVDD2CF1JPR0402JPR0402BLKWEILAND25.161.0253VDD2DVDDAVDD3PIN_SOLDER_JUMPERBLKBLKB3S1000BLKBLKBLKBLKPAD_CNVDD_FICNPM0PM1VCPVBPVAPCLKININPINNVNCF2IRQ0BBERG69157-102BLKJPR0402ADR280ARTZ10K499499499ICPIANIAPRESETBFDV302P4994992VDD2FDV302PIRQ1B10KCMD28-21VGCTR8T1CMD28-21VGCTR8T1CMD28-21VGCTR8T1CMD28-21VGCTR8T1XREF10UFVDD_F10UFVDD_F10KJPR04024.7UFMOSI/SDAIBNADE7858CPZSCLK/SCLPAD_CNBLKSSB/HSAMISO/HSD0.1UF4.7UFCF3/HSCLKCF1IRQ1BDVDDCLKOUTREFAVDDBERG69157-102BLK0.22UF0.22UF10KVDD20.1UFVDDBLK4.7UFDGND_DWEILAND25.161.025310KWEILAND25.161.0253VN_IN22NFAGNDDGNDBCOMADGNDDGNDAGNDAGNDAGNDDGNDAGNDAGNDAGNDV-V+VODGNDSCLK_SCLSS_N_HSAMISO_HSDMOSI_SDAIRQ1_N_SBSDAIRQ0_N_SBSCLRESET_NCF3_HSCLKCF2VNINNINPCF1CLKOUTCLKINVDDVAPVBPVCPREFIN_OUTDVDDPM1PM0PADAVDDAGNDDGNDICNICPIBNIBPIANIAPDGNDGDSDGNDGDSDGNDGDSDGNDGDSDGNDGDSDGNDAGNDAGNDAGNDAGNDAGNDAGNDBCOMA Figure 37. UG-146 Evaluation Board User Guide Rev. 0 | Page 26 of 36 INPUT ANTI-ALIAS AND DEVICE CONNECTIONC12C11C20C19C24C23C16C15C22C14C13C18C17C10C9C2121E2N21E1N21E2C21E1C21E1A21E2A21E1B21E2B21JP2N21JP1N21JP2C21JP1C21JP2B21JP1B21JP1A21JP2A21JP6N21JP4N21JP5N21JP3N21JP6C21JP5C21JP4C21JP3C21JP6B21JP4B21JP5B21JP3B21JP6A21JP4A21JP5A21JP3A21P421P321P121P21TP7R71TP8R23R24R15R16R81TP5R51TP6R21R22R13R14R6R4R3R12R11R20R191TP41TP31TP21TP1R17R18R2R1R10R9TBD12061500 OHMSBERG69157-102100TBD1206INN_INWEILAND25.161.0253TBD1206BERG69157-102BERG69157-102BERG69157-102WEILAND25.161.0253IBP_INIBN_INBERG69157-102BERG69157-102100TBD12061001K1KBERG69157-102BLKBERG69157-102BERG69157-102BERG69157-1021001KBLKBERG69157-102IBNIAPBERG69157-102BLK1KBLK100TBD12061KBLKBERG69157-102BERG69157-102TBD1206100INPINN1500 OHMS1500 OHMSTBD12061500 OHMSIAP_INICP100BERG69157-102IBPBERG69157-102TBD1206BERG69157-102ICN100BERG69157-102BLK1KBERG69157-1021500 OHMSIAN_IN1500 OHMSICP_INBLK1KBERG69157-1021500 OHMSICN_INWEILAND25.161.0253BERG69157-102BERG69157-102WEILAND25.161.02531500 OHMS1KBLKIAN22NF22NF22NF22NF22NF22NF22NF22NFBERG69157-102BERG69157-102INP_IN22NF22NF22NF22NF22NF22NF22NF22NFAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGND09078-043 Figure 38. Evaluation Board User Guide UG-146 Rev. 0 | Page 27 of 36 PHASE A VOLTAGEPHASE C VOLTAGEPHASE B VOLTAGEC34C33C32R26R28R2721E8C21E8B21E8A1TP10231JP9C21P621JP8CR3121JP7CR3421P721JP8BR3021JP7BR331TP11231JP9B21JP8A1TP1221JP7A21P8231JP9AR32R2922NF3PIN_SOLDER_JUMPERBERG69157-1021K1500 OHMSWEILAND25.161.0253WEILAND25.161.0253BERG69157-1021KBLK3PIN_SOLDER_JUMPERVBP1500 OHMSVCP_INVBP_INVN100KBERG69157-1021500 OHMS1KBERG69157-102VNBLK100KBERG69157-1021M1MWEILAND25.161.02531M3PIN_SOLDER_JUMPER100KBERG69157-102VCPVNBLKVAPVAP_IN22NF22NFBCOMAAGNDAGNDAGNDAGNDAGNDAGNDBCOMAAGNDAGNDAGNDBCOMA09078-044 Figure 39. UG-146 Evaluation Board User Guide Rev. 0 | Page 28 of 36 BYPASSING CONTROLLER(OPTIONAL; CUSTOMER SUPPLIED)TP FOR EVAL PROBE - DISTRIBUTE AROUND ISOLATED CIRCUITSNCD-D+GNDVBUS(5V)USB IFMRESETMCU CIRCUITUARTSHIELD D+, D-, VREF_MCU WITH GNDFROM CONN TO MCUISOLATED PSU CONNECTIONSP2_11P2_12PM0_CTRLP1_29P1_28P1_27P1_19CF3_HSCLK_ISOP2_9P2_8P2_7P2_6PM1_CTRLMCU_XT2P1_15SSB_ISOCF2_ISOP4_29IRQ1B_ISOP1_26P1_25P1_0P1_4P1_8MCU_XT1TMSP1_22P0_24P0_26MOSI_ISOGNDGNDGNDAMP227699-2CF1_ISOCF2_ISOAMP227699-2AMP227699-2CF3_HSCLK_ISOP0_20SML-LXT0805GW-TRBLK680CF3_HSCLK_ISOIRQ0B_ISOP2_1310KRTCK0.1UFWEILAND25.161.0253MCU_VDD_ISO10KBERG69157-102P2_2SAMTSW-1-30-08-GDRXDTXD10KBLKP1_31MCU_RSTSAMTECTSW10608GS4PINMCU_VDD10K27BLKMCU_VDD10UF0.1UF1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF1.5KP1_23MCU_VDDMCU_VDD10KLPC2368FBD100P0_22MCU_VDDD+D-D-_MCUD+_MCUVBUS274-1734376-8RSTOUT_NRTCX2P1_1USB_UPP4_28P3_26P3_25D+_MCUSDA_ISOIRQ_OUT_EN_ISOIRQ_IN_ENMISO_ISOSCLK_ISORESB_CTRLPM0_CTRLIRQ1B_ISOPM1_CTRLSBENB_ISOSSB_ISOTCLKTRST_NTDI10K10KP0_21P0_19P0_5D-_MCURXDTXDWPP0_4P0_9BLKBLKBLKBLKBLKBLKBLKBLKBLKBLKVBUSP2_1P2_0P2_3P2_5HSDATA_ISOMCU_XT120PFMCU_XT220PF12.000MHZMCU_RSTMCU_VDDB3S100010KP1_9P1_17P1_14P1_10P1_16MCU_VDDSAMTECTSW11008GDTMS10K10KTDITCLKRTCKTDOMCU_RST10KTDOSCL_ISOTRST_NHSA_ISOBLKBLKBLKP2_4IRQ0B_ISOMCU_RSTRESB_CTRLHSA_ISOMOSI_ISOSDA_ISOMISO_HSD_ISOSCLK_ISOSCL_ISOCF1_ISOR79R80R81TP461TP421TP431TP411P151234R82P1212C78PNC79TP161TP171TP181CF312345CF212345CF112345C72U8464849626361605947585756987625242998309981807978777695908988878632339434353637383940434445212093929175535251507473706968676665642726828517141001618521341928547196134284101215314155728397112223C75C73C76C77C83C84C80C81C82R78P131101112131415161718192203456789R44R45R75R73R72R71R83TP521TP441TP541TP451TP551TP531TP481TP471TP401S21243R74C74Y212C70C71CR6CAR77P14123456R76JP712P381101112131415161718192202122232425262728293303132456789P2_10TRST_NTCKP1_18_USB_UP_LED_PWM1_1VBATVREFVDDAVDD_DCDC_3V3_3VDD_DCDC_3V3_2VDD_DCDC_3V3_1VDD_3V3_4VDD_3V3_3VDD_3V3_2VDD_3V3_1VSSAVSSP1_0_ENET_TXD0P2_12_EINT2_MCIDAT2_I2STX_WSP2_11_EINT1_MCIDAT1_I2STX_CLKP2_10_EINT0P2_9_USB_CONNECT_RXD2_EXTIN0P2_8_TD2_TXD2_TRACEPKT3P2_7_RD2_RTS1_TRACEPKT2P2_6_PCAP1_0_RI1_TRACEPKT1P2_5_PWM1_6_DTR1_TRACEPKT0P2_4_PWM1_5_DSR1_TRACESYNCP2_3_PWM1_4_DCD1_PIPESTAT2P2_2_PWM1_3_CTS1_PIPESTAT1P2_1_PWM1_2_RXD1_PIPESTAT0P2_0_PWM1_1_TXD1_TRACECLKP1_31_SCK1_AD0_5P1_30_VBUS_AD0_4P1_29_PCAP1_1_MAT0_1P1_28_PCAP1_0_MAT0_0P1_27_CAP0_1P1_26_PWM1_6_CAP0_0P1_25_MAT1_1P1_24_PWM1_5_MOSI0P1_23_PWM1_4_MISO0P1_22_MAT1_0P1_21_PWM1_3_SSEL0P1_20_PWM1_2_SCK0P1_19_CAP1_1P1_17_ENET_MDIOP1_16_ENET_MDCP1_15_ENET_REF_CLKP1_14_ENET_RX_ERP1_10_ENET_RXD1P1_9_ENET_RXD0P1_8_ENET_CRSP1_4_ENET_TX_ENP1_1_ENET_TXD1RTCX2XTAL2RSTOUT_NTDORTCKP2_13_EINT3_MCIDAT3_I2STX_SDAP4_29_MAT2_1_RXD3P4_28_MAT2_0_TXD3P3_26_MAT0_1_PWM1_3P3_25_MAT0_0_PWM1_2P0_30_USB_DNP0_29_USB_DPP0_28_SCL0P0_27_SDA0P0_26_AD0_3_AOUT_RXD3P0_25_AD0_2_I2SRX_SDA_TXD3P0_24_AD0_1_I2SRX_WS_CAP3_1P0_23_AD0_0_I2SRX_CLK_CAP3_0P0_22_RTS1_MCIDAT0_TD1P0_21_RI1_MCIPWR_RD1P0_20_DTR1_MCICMD_SCL1P0_19_DSR1_MCICLK_SDA1P0_18_DCD1_MOSI0_MOSIP0_17_CTS1_MISO0_MISOP0_16_RXD1_SSEL0_SSELP0_15_TXD1_SCK0_SCKP0_11_RXD2_SCL2_MAT3_1P0_10_TXD2_SDA2_MAT3_0P0_9_I2STX_SDA_MOSI1_MAT2_3P0_8_I2STX_WS_MISO1_MAT2_2P0_7_I2STX_CLK_SCK1_MAT2_1P0_6_I2SRX_SDA_SSEL1_MAT2_0P0_5_I2SRX_WS_TD2_CAP2_1P0_4_I2SRX_CLK_RD2_CAP2_0P0_3_RXD0P0_2_TXD0P0_1_TD1_RXD3_SCL1P0_0_RD1_TXD3_SDA1RTCX1XTAL1RESET_NTMSTDI09078-038 Figure 40. Evaluation Board User Guide UG-146 Rev. 0 | Page 29 of 36 <- DUTISOLATION CIRCUITI2C/HSDC CONFIGSPI CONFIGSPI CONFIGI2C/HSDC CONFIGMCU ->0SDA_ISOSDA_ISO0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UF0.1UFSB_ENBSCL_ISOSCLSDASCLKSSBMOSISCLK_ISOMOSI_ISOSSB_ISOIRQ_OUT_ENMISO_HSD_ISOCF3_HSCLK_ISOHSA_ISOVE2_U6MISO/HSDCF3/HSCLKHSACTIVEIRQ_OUT_EN_ISOIRQ1BWP_UXIRQ0BIRQ1BCF2IRQ_IN_ENSBENB_ISOCF1_ISORESETBPM0PM1RESB_CTRLPM1_CTRLCF1ADUM1401BRWZ10KVE2_U310KADUM1401BRWZHSDATA_ISOSCLK/SCLSDAVDD2MCU_VDDSCLIRQ1B_ISOIRQ1B_ISOIRQ0B_ISO10KVE2_U610KADUM1401BRWZ10KHSACTIVESSB/HSASCLSSBSCLK00MISO_ISOMISO_HSD_ISO00SCL_ISO10K10KADUM1401BRWZ10K10K10KADUM1401BRWZIRQ_IN_ENCF2_ISOIRQ0B_ISO10K10KPM0_CTRLVE2_U3WPIRQ0B0.1UF10KIRQ_OUT_EN0.1UFADUM1250ARZMOSI/SDA0SDADNIDNIDNIDNIMOSI010K0A245362718U428915116710345111413126U328915116710345111413126U628915116710345111413126R48R49R51R55R54JP35JP33JP37JP3612JP3412JP3812JP3212JP31C58C59R58BR58AR59BR59AC56C57U728915116710345111413126R57R53U528915116710345111413126R50R46R47C55C54C53C52C51C50C49C48GND2VDD2VOAVOBVICVIDVE2GND1VE1VODVOCVIBVIAVDD1GND2VDD2VOAVOBVICVIDVE2GND1VE1VODVOCVIBVIAVDD1GND2VDD2VOAVOBVICVIDVE2GND1VE1VODVOCVIBVIAVDD1DGNDGNDSCL2SCL1SDA2SDA1VDD1VDD2GND1GND2GND2VDD2VOAVOBVICVIDVE2GND1VE1VODVOCVIBVIAVDD1GND2VDD2VOAVOBVICVIDVE2GND1VE1VODVOCVIBVIAVDD109078-045 Figure 41. UG-146 Evaluation Board User Guide Rev. 0 | Page 30 of 36 09078-039LEFT MOST PINS SHOULD BE FURTHEST FROM DUT26ALIGN PORTS AS DRAWN NEXT TO MCUSIDE WITH PINS76 - 100100755025DO NOT INSTALLSIDE WITH PINS1 - 25DO NOT INSTALLSIDE WITH PINS51 - 75DO NOT INSTALLDO NOT INSTALLALIGN PORTS AS DRAWN NEXT TO MCUALIGN PORTS AS DRAWN NEXT TO MCU1SIDE WITH PINS26 - 50ALIGN PORTS AS DRAWN NEXT TO MCU5176R5221JP9R5621JP8R8654321P1954321P2154321P2554321P2954321P3354321P3754321P2054321P2454321P2854321P3254321P3654321P2354321P2754321P3554321P3154321P2654321P3054321P3454321P2254321P18P1_29SAMTECTSW10608GS5PINBERG69157-102SAMTECTSW10608GS5PINP3_25D+_MCUP2_10SAMTECTSW10608GS5PINP0_20SAMTECTSW10608GS5PINDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNIDNITDOSAMTECTSW10608GS5PINSAMTECTSW10608GS5PINMISO_ISOSAMTECTSW10608GS5PINP1_28P1_22SAMTECTSW10608GS5PINSAMTECTSW10608GS5PINSAMTECTSW10608GS5PINHSA_ISOP1_19USB_UPP0_19P0_21TDISAMTECTSW10608GS5PINSAMTECTSW10608GS5PINP0_5PM1_CTRLP3_26P2_12P0_9SAMTECTSW10608GS5PINMCU_XT2SCL_ISOVBUSMCU_XT1SAMTECTSW10608GS5PINP1_31WPIRQ0B_ISOIRQ1B_ISOP2_13P2_0P2_1P2_2SAMTECTSW10608GS5PINP1_27P2_6P2_4P2_5RXDTXDRTCKSAMTECTSW10608GS5PINP1_8P1_0RSTOUT_NP1_26P1_25P1_23P2_8P2_9SSB_ISOSCLK_ISOSAMTECTSW10608GS5PINP1_16P1_17P1_10P1_15P1_14P1_4P1_1P1_9CF3_HSCLK_ISOSDA_ISOMCU_RSTRTCX2PM0_CTRLSBENB_ISOD-_MCUP4_29MOSI_ISOP2_3TMSP0_26IRQ_OUT_EN_ISOSAMTECTSW10608GS5PINSAMTECTSW10608GS5PINDNITRST_NTCLKIRQ_IN_ENP2_11P0_22P0_4P4_28RESB_CTRL10KBERG69157-10210K10KP0_24MCU_VDDP2_7HSDATA_ISOP0_24SAMTECTSW10608GS5PINGNDGND Figure 42. Evaluation Board User Guide UG-146 Rev. 0 | Page 31 of 36 DO NOT POPULATE U2SELF BOOT EEPROMFACTORY USE ONLYCURRENT MEASUREMENT - DO NOT INSTALLC61C62C63R66R651TP611TP6221P17482631A3R6221JP6021JP61R61R63R6074295310186A4321P16R6474856321U20.1UFVDD2VDD210KMICRO24LC128-I-SN0.1UFWP_UXSBSCLDNIDNIBLKBLKISNS_OUTWEILAND25.161.0253AD8553ARMZDNIDNI560PFVDD_F200KIRQ0BDNIDNI4.02KDNIDNIDO NOT INSTALLDNI100K100KVREF_ISNSVDDDNI10KVDD2SBSCLVDD200SBSDAIRQ1B10KSBCONSBCONSB_ENBMOLEX22-03-2031SBSDAADG820BRMZDNIDGNDDGNDDGNDDGNDVDDS2S1INGNDDVFBGNDVREFENVCCVORGBRGASCLA1A2A0WPSDAVSSVCC09078-046 Figure 43. UG-146 Evaluation Board User Guide Rev. 0 | Page 32 of 36 LAYOUT 09078-040 Figure 44. 09078-041 Figure 45. Evaluation Board User Guide UG-146 Rev. 0 | Page 33 of 36 09078-042 Figure 46. 09078-043 Figure 47. UG-146 Evaluation Board User Guide Rev. 0 | Page 34 of 36 ORDERING INFORMATION BILL OF MATERIALS Table 27. Qty Designator Description Manufacturer/Part Number 1 A1 IC-ADI, 1.2 V, ultralow power, high PSRR voltage reference Analog Devices, Inc./ADR280ARTZ 1 A2 IC swappable dual isolator Analog Devices, Inc./ADUM1250ARZ 4 C1, C8, C44, C78 Capacitor, tantalum, 10 μF AVX 20 C9 to C25, C32 to C34 Capacitor, ceramic, 22 nF AVX 30 C2, C7, C40, C42, C43, C48 to C59, C61, C62, C72, C73, C75 to C77, C79 to C84 Capacitor, chip, X7R 0805, 0.1 μF Murata 4 C26, C27, C70, C71 Capacitor, mono, ceramic, C0G, 0402, 20 pF Murata 3 C3, C5, C41 Capacitor, tantalum, 4.7 μF AVX 2 C38, C74 Capacitor, ceramic chip, 1206, X7R, 1.0 μF Taiyo Yuden 2 C4, C6 Capacitor, ceramic, X7R, 0.22 μF Phycomp (Yageo) 4 CF1 to CF3, CLKIN Connector, PCB coax, BNC, ST AMP (Tyco)/227699-2 5 CR1 to CR5 Diode, LED, green, SMD Chicago Mini Lamp (CML Innovative Technologies)/CMD28-21VGCTR8T1 1 CR6 LED, green, surface mount LUMEX/SML-LXT0805GW-TR 12 E1A, E1B, E1C, E1N, E2A, E2B, E2C, E2N, E8A, E8B, E8C, E8N Inductor, chip, ferrite bead, 0805, 1500 Ω Murata 37 JP2, JP7 to JP10, JP1A to JP8A, JP1B to JP8B, JP1C to JP8C, JP1N to JP8N Connector, PCB Berg jumper, ST, male 2-pin Berg/69157-102 5 JP11, JP12, JP9A, JP9B, JP9C 3-pin solder jumper N/A 6 JP32, JP34, JP36, JP38, JP60, JP61 Resistor jumper, SMD 0805 (open), 0 Ω Panasonic 11 P1 to P10, P12 Connector, PCB TERM, black, 2-pin, ST WeilandD/25.161.0253 2 P11, P38 Connector, PCB, header, SHRD, ST, male 32-pin Samtec/TSW-1-30-08-G-D 1 P13 Connector, PCB, Berg, header, ST, male 20-pin Samtec/TSW-110-08-G-D 1 P14 Connector, PCB, USB, Type B, R/A, through hole AMP (Tyco)/4-1734376-8 1 P15 Connector, PCB, Berg, header, ST, male 4-pin Samtec/TSW106-08-G-S 1 P16 Connector, PCB straight header 3-pin Molex/22-03-2031 5 Q1 to Q5 Trans digital FET P channel Fairchild/FDV302P 8 R1 to R8 Do not install (TBD_R1206) N/A 8 R9 to R16 Resistor, PREC, thick film chip, R1206, 100 Ω Panasonic 12 R17 to R25, R32 to R34 Resistor, PREC, thick film chip, R0805, 1 kΩ Panasonic 3 R26 to R28 Resistor, MF, RN55, 1 M Vishay-Dale 3 R29 to R31 Resistor, MF, RN5, 100 kΩ Vishay-Dale 39 R35, R36, R38, R44 to R57, R64 to R66, R68 to R76, R78, R82 to R86, R58A, R58B, R59A, R59B Resistor PREC thick film chip, R0805, 10 kΩ Panasonic 1 R37 Resistor, film, SMD 0805, 2 Ω Panasonic 5 R39 to R43 Resistor, PREC, thick film chip, R1206, 499 Panasonic 1 R77 Resistor, film, SMD, 0805, 680 Ω Multicomp 2 R79, R80 Resistor, film, SMD, 1206, 27 Ω Yageo-Phycomp 1 R81 Resistor, PREC, thick film chip, R1206, 1.5 kΩ Panasonic 1 RSB Resistor, jumper, SMD, 1206 (open), 0 Panasonic 2 S1, S2 SW SM mechanical key switch Omron/B3S1000 52 TP1 to TP18, TP22 to TP55 Connector, PCB, test point, black Components Corporation 1 U1 IC-ADI, polyphase, multifunction, energy metering IC Analog Devices, Inc./ADE7878CPZ 5 U3 to U7 IC-ADI quad channel digital isolator Analog Devices, Inc./ADum1401BRWZ 1 U8 IC ARM7, MCU, flash, 512 kΩ, 100 LQFP NXP/LPC2368FBD100 Evaluation Board User Guide UG-146 Rev. 0 | Page 35 of 36 Qty Designator Description Manufacturer/Part Number 1 Y1 IC crystal, 16.384 MHz Valpey Fisher Corporation 1 Y2 IC crystal quartz, 12.000 MHz ECS 1 A3 IC-ADI 1.8 V to 5.5 V 2:1 MUX/SPDT switches Analog Devices, Inc./ADG820BRMZ 1 A4 IC-ADI 1.8 V to 5 V auto-zero in amp with shutdown Analog Devices, Inc./AD8553ARMZ 1 C63 Capacitor, ceramic, NP0, 560 pF Phycomp (Yageo) 4 JP31, JP33, JP35, JP37 Resistor, jumper, SMD, 0805 (SHRT), 0 Panasonic 1 P17 Connector, PCB, TERM, black, 2-pin, ST Weiland/25.161.0253 20 P18 to P37 Connector, PCB, Berg, header, ST, male 5-pin Samtec/TSW106-08-G-S 1 R60 Resistor, PREC, thick film chip, R0805, 4.02 kΩ Panasonic 2 R61, R62 Resistor, PREC, thick film chip, R0805, 100 kΩ Panasonic 1 R63 Resistor, PREC, thick film chip, R1206, 200 kΩ Panasonic 2 TP61, TP62 Connector, PCB test point, black Components Corporation 1 U2 IC, serial EEPROM, 128 kΩ, 2.5 V Microchip/24LC128-I-SN UG-146 Evaluation Board User Guide Rev. 0 | Page 36 of 36 NOTES I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. 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As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. 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Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG09078-0-8/10(0) UCD3138 Highly Integrated Digital Controller for Isolated Power Data Manual PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Literature Number: SLUSAP2B March 2012–Revised July 2012 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Contents 1 Introduction ........................................................................................................................ 6 1.1 Features ...................................................................................................................... 6 1.2 Applications .................................................................................................................. 7 2 Overview ............................................................................................................................ 7 2.1 Description ................................................................................................................... 7 2.2 Ordering Information ........................................................................................................ 8 2.3 Product Selection Matrix ................................................................................................... 8 2.4 Functional Block Diagram .................................................................................................. 9 2.5 UCD3138 64 QFN – Pin Assignments ................................................................................. 10 2.6 Pin Functions .............................................................................................................. 11 2.7 UCD3138 40 QFN – Pin Assignments ................................................................................. 13 2.8 Pin Functions .............................................................................................................. 14 3 Electrical Specifications ..................................................................................................... 15 3.1 ABSOLUTE MAXIMUM RATINGS ...................................................................................... 15 3.2 THERMAL INFORMATION .............................................................................................. 15 3.3 RECOMMENDED OPERATING CONDITIONS ....................................................................... 15 3.4 ELECTRICAL CHARACTERISTICS .................................................................................... 16 3.5 PMBus/SMBus/I2C Timing ............................................................................................... 19 3.6 Power On Reset (POR) / Brown Out Reset (BOR) ................................................................... 20 3.7 Typical Clock Gating Power Savings ................................................................................... 21 3.8 Typical Temperature Characteristics ................................................................................... 22 4 Functional Overview .......................................................................................................... 23 4.1 ARM Processor ............................................................................................................ 23 4.2 Memory ..................................................................................................................... 23 4.2.1 CPU Memory Map and Interrupts ............................................................................ 23 4.2.1.1 Memory Map (After Reset Operation) ........................................................... 23 4.2.1.2 Memory Map (Normal Operation) ................................................................ 24 4.2.1.3 Memory Map (System and Peripherals Blocks) ................................................ 24 4.2.2 Boot ROM ....................................................................................................... 24 4.2.3 Customer Boot Program ....................................................................................... 25 4.2.4 Flash Management ............................................................................................. 25 4.3 System Module ............................................................................................................ 25 4.3.1 Address Decoder (DEC) ....................................................................................... 25 4.3.2 Memory Management Controller (MMC) .................................................................... 25 4.3.3 System Management (SYS) ................................................................................... 25 4.3.4 Central Interrupt Module (CIM) ............................................................................... 26 4.4 Peripherals ................................................................................................................. 27 4.4.1 Digital Power Peripherals ...................................................................................... 27 4.4.1.1 Front End ............................................................................................ 27 4.4.1.2 DPWM Module ..................................................................................... 28 4.4.1.3 DPWM Events ...................................................................................... 29 4.4.1.4 High Resolution DPWM ........................................................................... 31 4.4.1.5 Over Sampling ...................................................................................... 31 4.4.1.6 DPWM Interrupt Generation ...................................................................... 31 4.4.1.7 DPWM Interrupt Scaling/Range .................................................................. 31 4.5 DPWM Modes of Operation .............................................................................................. 32 4.5.1 Normal Mode .................................................................................................... 32 4.6 Phase Shifting ............................................................................................................. 34 4.7 DPWM Multiple Output Mode ............................................................................................ 35 4.8 DPWM Resonant Mode .................................................................................................. 36 4.9 Triangular Mode ........................................................................................................... 38 2 Contents Copyright © 2012, Texas Instruments Incorporated UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.10 Leading Edge Mode ....................................................................................................... 39 4.11 Sync FET Ramp and IDE Calculation .................................................................................. 41 4.12 Automatic Mode Switching ............................................................................................... 41 4.12.1 Phase Shifted Full Bridge Example .......................................................................... 41 4.12.2 LLC Example .................................................................................................... 42 4.12.3 Mechanism for Automatic Mode Switching .................................................................. 44 4.13 DPWMC, Edge Generation, IntraMux .................................................................................. 45 4.14 Filter ......................................................................................................................... 46 4.14.1 Loop Multiplexer ................................................................................................ 48 4.14.2 Fault Multiplexer ................................................................................................ 49 4.15 Communication Ports ..................................................................................................... 51 4.15.1 SCI (UART) Serial Communication Interface ............................................................... 51 4.15.2 PMBUS .......................................................................................................... 51 4.15.3 General Purpose ADC12 ...................................................................................... 52 4.15.4 Timers ............................................................................................................ 53 4.15.4.1 24-bit PWM Timer .................................................................................. 53 4.15.4.2 16-Bit PWM Timers ................................................................................ 54 4.15.4.3 Watchdog Timer .................................................................................... 54 4.16 Miscellaneous Analog ..................................................................................................... 54 4.17 Package ID Information ................................................................................................... 54 4.18 Brownout ................................................................................................................... 54 4.19 Global I/O ................................................................................................................... 55 4.20 Temperature Sensor Control ............................................................................................. 56 4.21 I/O Mux Control ............................................................................................................ 56 4.21.1 JTAG Use for I/O and JTAG Security ........................................................................ 57 4.22 Current Sharing Control .................................................................................................. 57 4.23 Temperature Reference .................................................................................................. 58 5 IC Grounding and Layout Recommendations ........................................................................ 59 6 Tools and Documentation ................................................................................................... 60 7 References ....................................................................................................................... 62 Revision History ......................................................................................................................... 63 Copyright © 2012, Texas Instruments Incorporated Contents 3 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com List of Figures 3-1 I2C/SMBus/PMBus Timing Diagram ........................................................................................... 20 3-2 Bus Timing in Extended Mode.................................................................................................. 20 3-3 Power On Reset (POR) / Brown Out Reset (BOR) .......................................................................... 20 3-4 EADC LSB Size with 4X Gain (mV) vs. Temperature ....................................................................... 22 3-5 ADC12 Measurement Temperature Sensor Voltage vs. Temperature.................................................... 22 3-6 ADC12 2.5-V Reference vs. Temperature .................................................................................... 22 3-7 ADC12 Temperature Sensor Measurement Error vs. Temperature....................................................... 22 3-8 UCD3138 Oscillator Frequency (2MHz Reference, Divided Down from 250MHz) vs. Temperature.................. 22 4-1 Input Stage of EADC Module ................................................................................................... 28 4-2 Front End Module ................................................................................................................ 28 4-3 Secondary-Referenced Phase-Shifted Full Bridge Control With Synchronous Rectification ................................................................................................ 42 4-4 Secondary-Referenced Half-Bridge Resonant LLC Control With Synchronous Rectification ................................................................................................ 43 4-5 Fault Mux Block Diagram ....................................................................................................... 51 4-6 PMBus Address Detection Method ............................................................................................ 52 4-7 ADC12 Control Block Diagram ................................................................................................. 53 4-8 Internal Temp Sensor............................................................................................................ 56 4-9 Simplified Current Sharing Circuitry ........................................................................................... 57 4 List of Figures Copyright © 2012, Texas Instruments Incorporated UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 List of Tables 2-1 Pin Functions ..................................................................................................................... 11 2-2 Pin Functions ..................................................................................................................... 14 3-1 I2C/SMBus/PMBus Timing Characteristics.................................................................................... 19 4-1 Interrupt Priority Table ........................................................................................................... 26 4-2 DPWM Interrupt Divide Ratio ................................................................................................... 31 Copyright © 2012, Texas Instruments Incorporated List of Tables 5 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Highly Integrated Digital Controller for Isolated Power Check for Samples: UCD3138 1 Introduction 1.1 Features 1 • Digital Control of up to 3 Independent – Synchronous Rectifier Soft On/Off Feedback Loops – Low IC Standby Power – Dedicated PID based hardware • Soft Start / Stop with and without Pre-bias – 2-pole/2-zero configurable • Fast Input Voltage Feed Forward Hardware – Non-Linear Control • Primary Side Voltage Sensing • Up to 16MHz Error Analog to Digital Converter • Copper Trace Current Sensing (EADC) • Flux and Phase Current Balancing for Non- – Configurable Resolution as Small as Peak Current Mode Control Applications 1mV/LSB • Current Share Bus Support – Automatic Resolution Selection – Analog Average – Up to 8x Oversampling – Master/Slave – Hardware Based Averaging (up to 8x) • Feature Rich Fault Protection Options – 14 bit Effective DAC – 7 High Speed Analog Comparators – Adaptive Sample Trigger Positioning – Cycle-by-Cycle Current Limiting • Up to 8 High Resolution Digital Pulse Width – Programmable Fault Counting Modulated (DPWM) Outputs – External Fault Inputs – 250ps Pulse Width Resolution – 10 Digital Comparators – 4ns Frequency Resolution – Programmable blanking time – 4ns Phase Resolution • Synchronization of DPWM waveforms between – Adjustable Phase Shift Between Outputs multiple UCD3138 devices – Adjustable Dead-band Between Pairs • 14 channel, 12 bit, 267 ksps General Purpose – Cycle-by-Cycle Duty Cycle Matching ADC with integrated – Up to 2MHz Switching Frequency – Programmable averaging filters • Configurable PWM Edge Movement – Dual sample and hold – Trailing Modulation • Internal Temperature Sensor – Leading Modulation • Fully Programmable High-Performance – Triangular Modulation 31.25MHz, 32-bit ARM7TDMI-S Processor • Configurable Feedback Control – 32 kByte (kB) Program Flash – Voltage Mode – 2 kB Data Flash with ECC – Average Current Mode – 4 kB Data RAM – Peak Current Mode Control – 4 kB Boot ROM Enables Firmware Boot-Load – Constant Current in the Field via I2C or UART – Constant Power • Communication Peripherals • Configurable Modulation Methods – I2C/PMBus – Frequency Modulation – 2 UARTs on UCD3138RGC (64-pin QFN) – Phase Shift Modulation – 1 UART on UCD3138RHA (40-pin QFN) – Pulse Width Modulation • JTAG Debug Port • Fast, Automatic and Smooth Mode Switching • Timer capture with selectable input pins – Frequency Modulation and PWM • Up to 5 Additional General Purpose Timers – Phase Shift Modulation and PWM • Built In Watchdog: BOD and POR • High Efficiency and Light Load Management • 64-pin QFN and 40-pin QFN packages – Burst Mode • Operating Temperature: –40°C to 125°C – Ideal Diode Emulation • Fusion_Digital_Power_Designer GUI Support 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright © 2012, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 1.2 Applications • Power Supplies and Telecom Rectifiers • Power Factor Correction • Isolated dc-dc Modules 2 Overview 2.1 Description The UCD3138 is a digital power supply controller from Texas Instruments offering superior levels of integration and performance in a single chip solution. The flexible nature of the UCD3138 makes it suitable for a wide variety of power conversion applications. In addition, multiple peripherals inside the device have been specifically optimized to enhance the performance of ac/dc and isolated dc/dc applications and reduce the solution component count in the IT and network infrastructure space. The UCD3138 is a fully programmable solution offering customers complete control of their application, along with ample ability to differentiate their solution. At the same time, TI is committed to simplifying our customer’s development effort through offering best in class development tools, including application firmware, Code Composer Studio™ software development environment, and TI’s power development GUI which enables customers to configure and monitor key system parameters. At the core of the UCD3138 controller are the digital control loop peripherals, also known as Digital Power Peripherals (DPP). Each DPP implements a high speed digital control loop consisting of a dedicated Error Analog to Digital Converter (EADC), a PID based 2 pole–2 zero digital compensator and DPWM outputs with 250 ps pulse width resolution. The device also contains a 12-bit, 267ksps general purpose ADC with up to 14 channels, timers, interrupt control, JTAG debug and PMBus and UART communications ports. The device is based on a 32-bit ARM7TDMI-S RISC microcontroller that performs real-time monitoring, configures peripherals and manages communications. The ARM microcontroller executes its program out of programmable flash memory as well as on-chip RAM and ROM. In addition to the FDPP, specific power management peripherals have been added to enable high efficiency across the entire operating range, high integration for increased power density, reliability, and lowest overall system cost and high flexibility with support for the widest number of control schemes and topologies. Such peripherals include: light load burst mode, synchronous rectification, LLC and phase shifted full bridge mode switching, input voltage feed forward, copper trace current sense, ideal diode emulation, constant current constant power control, synchronous rectification soft on and off, peak current mode control, flux balancing, secondary side input voltage sensing, high resolution current sharing, hardware configurable soft start with pre bias, as well as several other features. Topology support has been optimized for voltage mode and peak current mode controlled phase shifted full bridge, single and dual phase PFC, bridgeless PFC, hard switched full bridge and half bridge, and LLC half bridge and full bridge. Copyright © 2012, Texas Instruments Incorporated Overview 7 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 2.2 Ordering Information PART NUMBER PIN COUNT PACKAGE SUPPLY TOP SIDE MARKING OPERATING TEMPERATURE RANGE, TA UCD3138RGCT 64 QFN 250 (Small Reel) UCD3138 –40°C to 125°C UCD3138RGCR 64 QFN 2000 (Large Reel) UCD3138 –40°C to 125°C UCD3138RHAT 40 QFN 250 (Small Reel) UCD3138 –40°C to 125°C UCD3138RHAR 40 QFN 2500 (large Reel) UCD3138 –40°C to 125°C 2.3 Product Selection Matrix FEATURE UCD3138 64 PIN UCD3138 40 PIN ARM7TDMI-S Core Processor 31.25 MHz 31.25 MHz High Resolution DPWM Outputs (250ps Resolution) 8 8 Number of High Speed Independent Feedback Loops (# Regulated Output 3 3 Voltages) 12-bit, 267ksps, General Purpose ADC Channels 14 7 Digital Comparators at ADC Outputs 4 4 Flash Memory (Program) 32 KB 32 KB Flash Memory (Data) 2 KB 2 KB Flash Security √ √ RAM 4 KB 4 KB DPWM Switching Frequency up to 2 MHz up to 2 MHz Programmable Fault Inputs 4 1 + 2(1) High Speed Analog Comparators with Cycle-by-Cycle Current Limiting 7(2) 6(2) UART (SCI) 2 1(1) PMBus √ √ Timers 4 (16 bit) and 1 (24 bit) 4 (16 bit) and 1 (24 bit) Timer PWM Outputs 2 1 Timer Capture Inputs 1 1(1) Watchdog √ √ On Chip Oscillator √ √ Power-On Reset and Brown-Out Reset √ √ JTAG √ √ Package Offering 64 Pin QFN (9mm x 9mm) 40 Pin QFN (6mm x 6mm) Sync IN and Sync OUT Functions √ √ Total GPIO (includes all pins with multiplexed functions such as, DPWM, Fault 30 18 Inputs, SCI, etc.) External Interrupts 1 0 (1) This number represents an alternate pin out that is programmable via firmware. See the UCD3138 Digital Power Peripherals Programmer’s Manual for details. (2) To facilitate simple OVP and UVP connections both comparators B and C are connected to the AD03 pin. 8 Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Front End 2 Analog Comparators Power and 1.8 V Voltage Regulator AD07 AD06 AD04 V33DIO /RESET SCI_RX0 SCI_TX0 PMBUS_CLK PMBUS_DATA AGND V33D BP18 FAULT3 FAULT2 TCAP TMS TDI TDO TCK EXT_INT FAULT1 FAULT0 PWM1 PWM0 SCI_RX1 SCI_TX1 PMBUS_CTRL PMBUS_ALERT SYNC DGND DPWM3B DPWM3A DPWM2B DPWM2A DPWM1B DPWM1A DPWM0B DPWM0A EAP0 EAN0 EAP1 EAN1 V33 A AD00 AD01 AD0 2 AD1 3 PID Based Filter 0 DPWM0 DPWM1 DPWM2 DPWM3 PID Based Filter 1 PID Based Filter 2 ADC_EXT_ TRIG ADC12 ADC12 Control Sequencing, Averaging, Digital Compare, Dual Sample and hold AD[13:0 ] A B C D E F G Current Share Analog, Average, Master/Slave AD03 AD0 2 AD1 3 AGND PMBus Timers 4 – 16 bit (PWM) 1 – 24 bit UART0 UART1 GPIO Control JTAG Loop MUX ARM7TDMI-S 32 bit, 31.25 MHz Memory PFLASH 32 kB DFLASH 2 kB RAM 4 kB ROM 4 kB Power On Reset Brown Out Detection Oscillator Internal Temperature Sensor Advanced Power Control Mode Switching, Burst Mode, IDE, Synchronous Rectification soft on & off Front End 1 Constant Power Constant Current Input Voltage Feed Forward Front End Averaging Digital Comparators Fault MUX & Control Cycle by Cycle Current Limit Digital Comparators DAC0 EADC X AFE Value Dither ! CPCC Filter x Ramp SAR/Prebias Abs() 2 Avg() AFE 23-AFE Peak Current Mode Control Comparator A0 EAP2 EAN2 Front End 0 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 2.4 Functional Block Diagram Copyright © 2012, Texas Instruments Incorporated Overview 9 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 (64 QFN) AGND 1 AD13 2 AD12 3 AD10 4 AD07 5 AD06 6 AD04 7 AD03 8 V33DIO 9 10 /RESET 11 ADC_EXT_TRIG/TCAP/SYNC/PWM0 12 SCI_RX0 13 SCI_TX0 14 DGND PMBUS_CLK/SCI_TX0 15 PMBUS_DATA/SCI_RX0 16 48 AGND 47 V33D 46 BP18 45 V33DIO 44 DGND 43 FAULT3 42 FAULT2 41 TCAP 40 TMS 39 TDI/SCI_RX0/PMBUS_CTRL/FAULT1 38 TDO/SCI_TX0/PMBUS_ALERT/FAULT0 37 TCK/TCAP/SYNC/PWM0 36 FAULT1 35 FAULT0 34 INT_EXT 33 DGND 32 PWM1 31 PWM0 30 SCI_RX1/PMBUS_CTRL 29 SCI_TX1/PMBUS_ALERT 28 PMBUS_CTRL 27 PMBUS_ALERT 26 SYNC/TCAP/ADC_EXT_TRIG/PWM0 25 DGND 24 DPWM3B 23 DPWM3A 22 DPWM2B 21 DPWM2A 20 DPWM1B 19 DPWM1A 18 DPWM0B 17 DPWM0A 64 AGND 63 EAP0 62 EAN0 61 EAP1 60 EAN1 59 EAP2 58 EAN2 57 AGND 56 V33A 55 AD00 54 AD01 53 AD02 52 AD05 51 AD08 50 AD09 49 AD11 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 2.5 UCD3138 64 QFN – Pin Assignments 10 Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 2.6 Pin Functions Additional pin functionality is specified in the following table. Table 2-1. Pin Functions ALTERNATE ASSIGNMENT PIN NAME PRIMARY ASSIGNMENT CONFIGURABLE NO. 1 NO. 2 NO. 3 AS A GPIO? 1 AGND Analog ground 2 AD13 12-bit ADC, Ch 13, comparator E, I-share DAC output 3 AD12 12-bit ADC, Ch 12 4 AD10 12-bit ADC, Ch 10 5 AD07 12-bit ADC, Ch 7, Connected to comparator F and reference DAC output to comparator G 6 AD06 12-bit ADC, Ch 6, Connected to comparator F DAC output 7 AD04 12-bit ADC, Ch 4, Connected to comparator D DAC output 8 AD03 12-bit ADC, Ch 3, Connected to comparator B and C 9 V33DIO Digital I/O 3.3V core supply 10 DGND Digital ground 11 RESET Device Reset Input, active low 12 ADC_EXT_TRIG ADC conversion external trigger input TCAP SYNC PWM0 Yes 13 SCI_RX0 SCI RX 0 Yes 14 SCI_TX0 SCI TX 0 Yes 15 PMBUS_CLK PMBUS Clock (Open Drain) SCI TX 0 Yes 16 PMBUS_DATA PMBus data (Open Drain) SCI RX 0 Yes 17 DPWM0A DPWM 0A output Yes 18 DPWM0B DPWM 0B output Yes 19 DPWM1A DPWM 1A output Yes 20 DPWM1B DPWM 1B output Yes 21 DPWM2A DPWM 2A output Yes 22 DPWM2B DPWM 2B output Yes 23 DPWM3A DPWM 3A output Yes 24 DPWM3B DPWM 3B output Yes 25 DGND Digital ground 26 SYNC DPWM Synchronize pin TCAP ADC_EXT_ PWM0 Yes TRIG 27 PMBUS_ALERT PMBus Alert (Open Drain) Yes 28 PMBUS_CTRL PMBus Control (Open Drain) Yes 29 SCI_TX1 SCI TX 1 PMBUS_AL Yes ERT 30 SCI_RX1 SCI RX 1 PMBUS_CT Yes RL 31 PWM0 General purpose PWM 0 Yes 32 PWM1 General purpose PWM 1 Yes 33 DGND Digital ground 34 INT_EXT External Interrupt Yes 35 FAULT0 External fault input 0 Yes 36 FAULT1 External fault input 1 Yes 37 TCK JTAG TCK TCAP SYNC PWM0 Yes 38 TDO JTAG TDO SCI_TX0 PMBUS_AL FAULT0 Yes ERT 39 TDI JTAG TDI SCI_RX0 PMBUS_CT FAULT1 Yes RL 40 TMS JTAG TMS Yes 41 TCAP Timer capture input Yes 42 FAULT2 External fault input 2 Yes 43 FAULT3 External fault input 3 Yes Copyright © 2012, Texas Instruments Incorporated Overview 11 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Table 2-1. Pin Functions (continued) ALTERNATE ASSIGNMENT PIN NAME PRIMARY ASSIGNMENT CONFIGURABLE NO. 1 NO. 2 NO. 3 AS A GPIO? 44 DGND Digital ground 45 V33DIO Digital I/O 3.3V core supply 46 BP18 1.8V Bypass 47 V33D Digital 3.3V core supply 48 AGND Substrate analog ground 49 AGND Analog ground 50 EAP0 Channel #0, differential analog voltage, positive input 51 EAN0 Channel #0, differential analog voltage, negative input 52 EAP1 Channel #1, differential analog voltage, positive input 53 EAN1 Channel #1, differential analog voltage, negative input 54 EAP2 Channel #2, differential analog voltage, positive input 55 EAN2 Channel #2, differential analog voltage, negative input 56 AGND Analog ground 57 V33A Analog 3.3V supply 58 AD00 12-bit ADC, Ch 0, Connected to current source 59 AD01 12-bit ADC, Ch 1, Connected to current source 60 AD02 12-bit ADC, Ch 2, Connected to comparator A, I-share 61 AD05 12-bit ADC, Ch 5 62 AD08 12-bit ADC, Ch 8 63 AD09 12-bit ADC, Ch 9 64 AD11 12-bit ADC, Ch 11 12 Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 (40 QFN) AGND 1 2 3 4 5 AD13 6 AD06 7 AD04 8 AD03 9 DGND 10 /RESET 11 ADC_EXT_TRIG/TCAP/SYNC/PWM0 12 13 14 15 PMBUS_CLK/SCI_TX0 16 PMBUS_DATA/SCI_RX0 AGND BP18 DGND V33D 40 39 TMS 38 TDI/SCI_RX0/PMBUS_CTRL/FAULT1 37 TDO/SCI_TX0/PMBUS_ALERT/FAULT0 36 TCK/TCAP/SYNC/PWM0 35 34 33 FAULT2 32 31 AGND 30 29 28 27 26 DPWM3B 25 DPWM3A 24 PMBUS_CTRL 23 PMBUS_ALERT 22 DPWM2B 21 DPWM2A 20 DPWM1B 19 DPWM1A 18 DPWM0B 17 DPWM0A EAP0 EAN0 EAP1 EAN1 EAP2 AGND V33A AD00 AD01 AD02 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 2.7 UCD3138 40 QFN – Pin Assignments Copyright © 2012, Texas Instruments Incorporated Overview 13 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 2.8 Pin Functions Additional pin functionality is specified in the following table. Table 2-2. Pin Functions ALTERNATE ASSIGNMENT PIN NAME PRIMARY ASSIGNMENT CONFIGURABLE NO. 1 NO. 2 NO. 3 AS A GPIO? 1 AGND Analog ground 2 AD13 12-bit ADC, Ch 13, Connected to comparator E, I-share 3 AD06 12-bit ADC, Ch 6, Connected to comparator F 4 AD04 12-bit ADC, Ch 4, Connected to comparator D 5 AD03 12-bit ADC, Ch 3, Connected to comparator B & C 6 DGND Digital ground 7 RESET Device Reset Input, active low 8 ADC_EXT_TRIG ADC conversion external trigger input TCAP SYNC PWM0 Yes 9 PMBUS_CLK PMBUS Clock (Open Drain) SCI_TX0 Yes 10 PMBUS_DATA PMBus data (Open Drain) SCI_RX0 Yes 11 DPWM0A DPWM 0A output Yes 12 DPWM0B DPWM 0B output Yes 13 DPWM1A DPWM 1A output Yes 14 DPWM1B DPWM 1B output Yes 15 DPWM2A DPWM 2A output Yes 16 DPWM2B DPWM 2B output Yes 17 DWPM3A DPWM 3A output Yes 18 DPWM3B DPWM 3B output Yes 19 PMBUS_ALERT PMBus Alert (Open Drain) Yes 20 PMBUS_CTRL PMBus Control (Open Drain) Yes 21 TCK JTAG TCK TCAP SYNC PWM0 Yes 22 TDO JTAG TDO SCI_TX0 PMBUS_A FAULT0 Yes LERT 23 TDI JTAG TDI SCI_RX0 PMBUS_C FAULT1 Yes TRL 24 TMS JTAG TMS Yes 25 FAULT2 External fault input 2 Yes 26 DGND Digital ground 27 V33D Digital 3.3V core supply 28 BP18 1.8V Bypass 29 AGND Substrate analog ground 30 AGND Analog ground 31 EAP0 Channel #0, differential analog voltage, positive input 32 EAN0 Channel #0, differential analog voltage, negative input 33 EAP1 Channel #1, differential analog voltage, positive input 34 EAN1 Channel #1, differential analog voltage, negative input 35 EAP2 Channel #2, differential analog voltage, positive input 36 AGND Analog ground 37 V33A Analog 3.3V supply 38 AD00 12-bit ADC, Ch 0, Connected to current source 39 AD01 12-bit ADC, Ch 1, Connected to current source 40 AD02 12-bit ADC, Ch 2, Connected to comparator A, I-share 14 Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 3 Electrical Specifications 3.1 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VALUE UNIT MIN MAX V33D V33D to DGND –0.3 3.8 V V33DIO V33DIO to DGND –0.3 3.8 V V33A V33A to AGND –0.3 3.8 V |DGND – AGND| Ground difference 0.3 V All Pins, excluding AGND(2) Voltage applied to any pin –0.3 3.8 V TOPT Junction Temperature –40 125 °C TSTG Storage temperature –55 150 °C (1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) Referenced to DGND 3.2 THERMAL INFORMATION UCD3138 UCD3138 THERMAL METRIC(1) 64 PIN QFN 40 PIN UNITS QFN θJA Junction-to-ambient thermal resistance (2) 25.1 31.8 θJCtop Junction-to-case (top) thermal resistance (3) 10.5 18.5 θJB Junction-to-board thermal resistance (4) 4.6 6.8 °C/W ψJT Junction-to-top characterization parameter(5) 0.2 0.2 ψJB Junction-to-board characterization parameter (6) 4.6 6.7 θJCbot Junction-to-case (bottom) thermal resistance (7) 1.2 1.8 (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953 (2) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, as specified in JESD51-7, in an environment described in JESD51-2a. (3) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88. (4) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB temperature, as described in JESD51-8. (5) The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining θJA, using a procedure described in JESD51-2a (sections 6 and 7). (6) The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted from the simulation data for obtaining θJA , using a procedure described in JESD51-2a (sections 6 and 7). (7) The junction-to-case (bottom) thermal resistance is obtained by simulating a cold plate test on the exposed (power) pad. No specific JEDEC standard test exists, but a close description can be found in the ANSI SEMI standard G30-88. Spacer 3.3 RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) MIN TYP MAX UNIT V33D Digital power 3.0 3.3 3.6 V V33DIO Digital I/O power 3.0 3.3 3.6 V33A Analog power 3.0 3.3 3.6 V TJ Junction temperature -40 - 125 °C Copyright © 2012, Texas Instruments Incorporated Electrical Specifications 15 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 3.4 ELECTRICAL CHARACTERISTICS V33A = V33D = V33DIO = 3.3V; 1μF from BP18 to DGND, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT SUPPLY CURRENT Measured on V33A. The device is I33A powered up but all ADC12 and EADC 6.3 mA sampling is disabled I33DIO All GPIO and communication pins are 0.35 mA open I33D ROM program execution 60 mA I33D Flash programming in ROM mode 70 mA The device is in ROM mode with all I33 DPWMs enabled and switching at 2 100 mA MHz. The DPWMs are all unloaded. ERROR ADC INPUTS EAP, EAN EAP – AGND –0.15 1.998 V EAP – EAN –0.256 1.848 V Typical error range AFE = 0 –256 248 mV AFE = 3 0.8 1 1.20 mV AFE = 2 1.7 2 2.30 mV EAP – EAN Error voltage digital resolution AFE = 1 3.55 4 4.45 mV AFE = 0 6.90 8 9.10 mV REA Input impedance (See Figure 4-1) AGND reference 0.5 MΩ IOFFSET Input offset current (See Figure 4-1) –5 5 μA Input voltage = 0 V at AFE = 0 –2 2 LSB Input voltage = 0 V at AFE = 1 –2.5 2.5 LSB EADC Offset Input voltage = 0 V at AFE = 2 –3 -3 LSB Input voltage = 0 V at AFE = 3 –4 4 LSB Sample Rate 16 MHz Analog Front End Amplifier Bandwidth 100 MHz Gain See Figure 4-2 1 V/V A0 Minimum output voltage 100 mV EADC DAC DAC range 0 1.6 V VREF DAC reference resolution 10 bit, No dithering enabled 1.56 mV VREF DAC reference resolution With 4 bit dithering enabled 97.6 μV INL –3.0 3.0 LSB DNL Does not include MSB transition –2.1 1.6 LSB DNL at MSB transition -1.4 LSB DAC reference voltage 1.58 1.61 V τ Settling Time From 10% to 90% 250 ns ADC12 IBIAS Bias current for PMBus address pins 9.5 10.5 μA Measurement range for voltage monitoring 0 2.5 V Internal ADC reference voltage –40°C to 125°C 2.475 2.500 2.525 V –40°C to 25°C –0.4 Change in Internal ADC reference from 25°C to 85°C –1.8 mV 25°C reference voltage(1) 25°C to 125°C –4.2 (1) As designed and characterized. Not 100% tested in production. 16 Electrical Specifications Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 ELECTRICAL CHARACTERISTICS (continued) V33A = V33D = V33DIO = 3.3V; 1μF from BP18 to DGND, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT ADC12 INL integral nonlinearity(1) +/-2.5 LSB ADC12 DNL differential nonlinearity(1) ADC_SAMPLINGSEL = 6 for all ADC12 –0.7/+2.5 LSB ADC Zero Scale Error data, 25 °C to 125 °C –7 7 mV ADC Full Scale Error –35 35 mV Input bias 2.5 V applied to pin 400 nA Input leakage resistance(1) ADC_SAMPLINGSEL= 6 or 0 1 MΩ Input Capacitance(1) 10 pF ADC single sample conversion time(1) ADC_SAMPLINGSEL= 6 or 0 3.9 μs DIGITAL INPUTS/OUTPUTS(2) (3) V DGND OL Low-level output voltage(4) IOH = 4 mA, V33DIO = 3 V + 0.25 V V V33DIO OH High-level output voltage (4) IOH = –4 mA, V33DIO = 3 V – 0.6 V VIH High-level input voltage V33DIO = 3 V 2.1 V VIL Low-level input voltage V33DIO = 3 V 1.1 V IOH Output sinking current 4 mA IOL Output sourcing current –4 mA SYSTEM PERFORMANCE TWD Watchdog time out range Total time is: TWD x 14.6 17 20.5 ms (WDCTRL.PERIOD+1) Time to disable DPWM output based on High level on FAULT pin 70 ns active FAULT pin signal Processor master clock (MCLK) 31.25 MHz tDelay Digital compensator delay(5) (1 clock = 32ns) 6 clocks VDD Slew minimum VDD slew rate(6) VDD slew rate between 2.3 V and 2.9 V 0.25 V/ms t(reset) Pulse width needed at reset(6) 10 μs Retention period of flash content (data TJ = 25°C 100 years retention and program) Program time to erase one page or block in 20 ms data flash or program flash Program time to write one word in data 20 μs flash or program flash f(PCLK) Internal oscillator frequency 240 250 260 MHz Sync-in/sync-out pulse width Sync pin 256 ns Flash Read 1 MCLKs Flash Write 20 μs I Current share current source (See SHARE Figure 4-9) 238 259 μA RSHARE Current share resistor (See Figure 4-9) 9.75 10.3 kΩ POWER ON RESET AND BROWN OUT (V33D pin, See Figure 3-3) VGH Voltage good High 2.7 V VGL Voltage good Low 2.5 V Vres Voltage at which IReset signal is valid 0.8 V (2) DPWM outputs are low after reset. Other GPIO pins are configured as inputs after reset. (3) On the 40 pin package V33DIO is connected to V33D internally. (4) The maximum total current, IOHmax and IOLmax for all outputs combined, should not exceed 12 mA to hold the maximum voltage drop specified. Maximum sink current per pin = –6 mA at VOL; maximum source current per pin = 6 mA at VOH. (5) Time from close of error ADC sample window to time when digitally calculated control effort (duty cycle) is available. This delay, which has no variation associated with it, must be accounted for when calculating the system dynamic response. (6) As designed and characterized. Not 100% tested in production. Copyright © 2012, Texas Instruments Incorporated Electrical Specifications 17 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com ELECTRICAL CHARACTERISTICS (continued) V33A = V33D = V33DIO = 3.3V; 1μF from BP18 to DGND, TJ = –40°C to 125°C (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT T Time delay after Power is good or POR RESET* relinquished 1 ms Brownout Internal signal warning of brownout 2.9 V conditions TEMPERATURE SENSOR(7) VTEMP Voltage range of sensor 1.46 2.44 V Voltage resolution Volts/°C 5.9 mV/ºC Temperature resolution Degree C per bit 0.1034 ºC/LSB Accuracy(7) (8) -40°C to 125°C –10 ±5 10 ºC Temperature range -40°C to 125°C –40 125 ºC ITEMP Current draw of sensor when active 30 μA TON Turn on time / settling time of sensor 100 μs VAMB Ambient temperature Trimmed 25°C reading 1.85 V ANALOG COMPARATOR DAC Reference DAC Range 0 2.5 V Reference Voltage 2.478 2.5 2.513 V Bits 7 bits INL(7) –0.42 0.21 LSB DNL(7) 0.06 0.12 LSB Offset –5.5 19.5 mV Time to disable DPWM output based on 0 V to 2.5 V step input on the analog 150 ns comparator.(9) Reference DAC buffered output load(10) 0.5 1 mA Buffer offset (-0.5 mA) 4.6 8.3 mV Buffer offset (1.0 mA) –0.05 17 mV (7) Characterized by design and not production tested. (8) Ambient temperature offset value should be used from the TEMPSENCTRL register to meet accuracy. (9) As designed and characterized. Not 100% tested in production. (10) Available from reference DACs for comparators D, E, F and G. 18 Electrical Specifications Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 3.5 PMBus/SMBus/I2C Timing The timing characteristics and timing diagram for the communications interface that supports I2C, SMBus, and PMBus in Slave or Master mode are shown in Table 3-1, Figure 3-1, and Figure 3-2. The numbers in Table 3-1 are for 400 kHz operating frequency. However, the device supports all three speeds, standard (100 kHz), fast (400 kHz), and fast mode plus (1 MHz). Table 3-1. I2C/SMBus/PMBus Timing Characteristics PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Typical values at TA = 25°C and VCC = 3.3 V (unless otherwise noted) fSMB SMBus/PMBus operating frequency Slave mode, SMBC 50% duty cycle 100 1000 kHz fI2C I2C operating frequency Slave mode, SCL 50% duty cycle 100 1000 kHz t(BUF) Bus free time between start and stop 1.3 ms t(HD:STA) Hold time after (repeated) start 0.6 ms t(SU:STA) Repeated start setup time 0.6 ms t(SU:STO) Stop setup time 0.6 ms t(HD:DAT) Data hold time Receive mode 0 ns t(SU:DAT) Data setup time 100 ns t(TIMEOUT) Error signal/detect(1) 35 ms t(LOW) Clock low period 1.3 ms t(HIGH) Clock high period(2) 0.6 ms t Cumulative clock low slave extend (LOW:SEXT) time(3) 25 ms t 20 + 0.1 f Clock/data fall time Rise time tr = (VILmax – 0.15) to (VIHmin + 0.15) Cb(4) 300 ns t 20 + 0.1 r Clock/data rise time Fall time tf = 0.9 VDD to (VILmax – 0.15) Cb(4) 300 ns Cb Total capacitance of one bus line 400 pF (1) The device times out when any clock low exceeds t(TIMEOUT). (2) t(HIGH), Max, is the minimum bus idle time. SMBC = SMBD = 1 for t > 50 ms causes reset of any transaction that is in progress. This specification is valid when the NC_SMB control bit remains in the default cleared state (CLK[0] = 0). (3) t(LOW:SEXT) is the cumulative time a slave device is allowed to extend the clock cycles in one message from initial start to the stop. (4) Cb (pF) Figure 3-1. I2C/SMBus/PMBus Timing Diagram Copyright © 2012, Texas Instruments Incorporated Electrical Specifications 19 Submit Documentation Feedback Product Folder Link(s): UCD3138 TPOR undefined V33D IReset 3.3 V TPOR VGH VGL Vres t t Brown Out UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Figure 3-2. Bus Timing in Extended Mode 3.6 Power On Reset (POR) / Brown Out Reset (BOR) Figure 3-3. Power On Reset (POR) / Brown Out Reset (BOR) VGH – This is the V33D threshold where the internal power is declared good. The UCD3138 comes out of reset when above this threshold. VGL – This is the V33D threshold where the internal power is declared bad. The device goes into reset when below this threshold. Vres – This is the V33D threshold where the internal reset signal is no longer valid. Below this threshold the device is in an indeterminate state. IReset – This is the internal reset signal. When low, the device is held in reset. This is equivalent to holding the reset pin on the IC high. TPOR – The time delay from when VGH is exceeded to when the device comes out of reset. Brown – This is the V33D voltage threshold at which the device sets the brown out status bit. In Out addition an interrupt can be triggered if enabled. 20 Electrical Specifications Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 DPWM FE_CTRL PCM ADC12 PMBUS TIMER CPCC FILTER SCI SCI GIO 0 1 2 3 4 5 6 UCD3138 Function Power Savings (mA) G001 4.9 2.57 1.2 0.8 0.4 0.4 0.2 0.2 0.1 0.1 0 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 3.7 Typical Clock Gating Power Savings Power disable control register provides control bits that can enable or disable arrival of clock to several peripherals such as, PCM, CPCC, digital filters, front ends, DPWMs, UARTs, ADC-12 and more. All these controls are enabled as default. If a specific peripheral is not used in a specific application the clock gate can be disabled in order to block the propagation of clock signal to that peripheral and therefore reduce the overall current consumption of the device. Copyright © 2012, Texas Instruments Incorporated Electrical Specifications 21 Submit Documentation Feedback Product Folder Link(s): UCD3138 2.475 2.480 2.485 2.490 2.495 2.500 2.505 2.510 2.515 −40 −20 0 20 40 60 80 100 120 Temperature (°C) ADC12 Reference G003b ADC12 2.5-V Reference 1.92 1.96 2 2.04 2.08 −40 −20 0 20 40 60 80 100 120 Temperature (°C) 2-MHZ Reference G004b UCD3138 Oscillator Frequency −4 −2 0 2 4 6 8 −40 −20 0 20 40 60 80 100 120 Temperature (°C) ADC12 Error (LSB) G002b ADC12 Temperature Sensor Measurement Error 1.4 1.6 1.8 2.0 2.2 2.4 2.6 −60 −40 −20 0 20 40 60 80 100 120 140 160 Temperature (°C) Sensor Voltage (V) G006b ADC12 Measurement Temperature Sensor Voltage 1.6 1.7 1.8 1.9 2 2.1 −40 −20 0 20 40 60 80 100 120 Temperature (°C) EADC LSB Size (mV) G005a UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 3.8 Typical Temperature Characteristics Figure 3-4. EADC LSB Size with 4X Gain (mV) vs. Temperature Figure 3-5. ADC12 Measurement Temperature Figure 3-7. ADC12 Temperature Sensor Sensor Voltage vs. Temperature Measurement Error vs. Temperature Figure 3-6. ADC12 2.5-V Reference vs. Figure 3-8. UCD3138 Oscillator Frequency (2MHz Temperature Reference, Divided Down from 250MHz) vs. Temperature 22 Electrical Specifications Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4 Functional Overview 4.1 ARM Processor The ARM7TDMI-S processor is a synthesizable member of the ARM family of general purpose 32-bit microprocessors. The ARM architecture is based on RISC (Reduced Instruction Set Computer) principles where two instruction sets are available. The 32-bit ARM instruction set and the 16-bit Thumb instruction set. The Thumb instruction allows for higher code density equivalent to a 16-bit microprocessor, with the performance of the 32-bit microprocessor. The three-staged pipelined ARM processor has fetch, decode and execute stage architecture. Major blocks in the ARM processor include a 32-bit ALU, 32 x 8 multiplier, and a barrel shifter. A JTAG port is also available for firmware debugging. 4.2 Memory The UCD3138 (ARM7TDMI-S) is a Von-Neumann architecture, where a single bus provides access to all of the memory modules. All of the memory module addresses are sequentially aligned along the same address range. This applies to program flash, data flash, ROM and all other peripherals. Within the UCD3138 architecture, there is a 1024x32-bit Boot ROM that contains the initial firmware startup routines for PMBUS communication and non-volatile (FLASH) memory download. This boot ROM is executed after power-up-reset checks if there is a valid FLASH program written. If a valid program is present, the ROM code branches to the main FLASH-program execution. UCD3138 also supports customization of the boot program by allowing an alternative boot routine to be executed from program FLASH. This feature enables assignment of a unique address to each device; therefore, enabling firmware reprogramming even when several devices are connected on the same communication bus. Two separate FLASH memory areas are present inside the device. The 32 kB Program FLASH is organized as an 8 k x 32 bit memory block and is intended to be for the firmware program. The block is configured with page erase capability for erasing blocks as small as 1kB per page, or with a mass erase for erasing the entire program FLASH array. The FLASH endurance is specified at 1000 erase/write cycles and the data retention is good for 100 years. The 2 kB data FLASH array is organized as a 512 x 32 bit memory (32 byte page size). The Data FLASH is intended for firmware data value storage and data logging. Thus, the Data FLASH is specified as a high endurance memory of 20 k cycles with embedded error correction code (ECC). For run time data storage and scratchpad memory, a 4 kB RAM is available. The RAM is organized as a 1 k x 32 bit array. 4.2.1 CPU Memory Map and Interrupts When the device comes out of power-on-reset, the data memories are mapped to the processor as follows: 4.2.1.1 Memory Map (After Reset Operation) Address Size Module 0x0000_0000 – 0x0000_FFFF In 16 repeated blocks of 4K each 16 X 4K Boot ROM 0x0001_0000 – 0x0001_7FFF 32K Program Flash 0x0001_8800 – 0x0001_8FFF 2K Data Flash 0x0001_9000 – 0x0001_9FFF 4K Data RAM Copyright © 2012, Texas Instruments Incorporated Functional Overview 23 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.2.1.2 Memory Map (Normal Operation) Just before the boot ROM program gives control to FLASH program, the ROM configures the memory as follows: Address Size Module 0x0000_0000 – 0x0000_7FFF 32K Program Flash 0x0001_0000 – 0x0001_AFFF 4K Boot ROM 0x0001_8800 – 0x0001_8FFF 2K Data Flash 0x0001_9000 – 0x0001_9FFF 4K Data RAM 4.2.1.3 Memory Map (System and Peripherals Blocks) Address Size Module 0x0002_0000 - 0x0002_00FF 256 Loop Mux 0x0003_0000 - 0x0003_00FF 256 Fault Mux 0x0004_0000 - 0x0004_00FF 256 ADC 0x0005_0000 - 0x0005_00FF 256 DPWM 3 0x0006_0000 - 0x0006_00FF 256 Filter 2 0x0007_0000 - 0x0007_00FF 256 DPWM 2 0x0008_0000 - 0x0008_00FF 256 Front End/Ramp I/F 2 0x0009_0000 - 0x0009_00FF 256 Filter 1 0x000A_0000 - 0x000A_00FF 256 DPWM 1 0x000B_0000 – 0x000B_00FF 256 Front End/Ramp I/F 1 0x000C_0000 - 0x000C_00FF 256 Filter 0 0x000D_0000 - 0x000D_00FF 256 DPWM 0 0x000E_0000 - 0x000E_00FF 256 Front End/Ramp I/F 0 0xFFF7_EC00 - 0xFFF7_ECFF 256 UART 0 0xFFF7_ED00 - 0xFFF7_EDFF 256 UART 1 0xFFF7_F000 - 0xFFF7_F0FF 256 Miscellaneous Analog Control 0xFFF7_F600 - 0xFFF7_F6FF 256 PMBus Interface 0xFFF7_FA00 - 0xFFF7_FAFF 256 GIO 0xFFF7_FD00 - 0xFFF7_FDFF 256 Timer 0xFFFF_FD00 - 0xFFFF_FDFF 256 MMC 0xFFFF_FE00 - 0xFFFF_FEFF 256 DEC 0xFFFF_FF20 - 0xFFFF_FF37 23 CIM 0xFFFF_FF40 - 0xFFFF_FF50 16 PSA 0xFFFF_FFD0 - 0xFFFF_FFEC 28 SYS The registers and bit definitions inside the System and Peripheral blocks are detailed in the programmer’s guide for each peripheral. 4.2.2 Boot ROM The UCD3138 incorporates a 4k boot ROM. This boot ROM includes support for: • Program download through the PMBus • Device initialization • Examining and modifying registers and memory • Verifying and executing program FLASH automatically • Jumping to a customer defined boot program 24 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 The Boot ROM is entered automatically on device reset. It initializes the device and then performs checksums on the Program FLASH. If the first 2 kB of program FLASH has a valid checksum, the program jumps to location 0 in the Program FLASH. This permits the use of a customer boot program. If the first checksum fails, it performs a checksum on the complete 32 kB of program flash. If this is valid, it also jumps to location 0 in the program flash. This permits full automated program memory checking, when there is no need for a custom boot program. If neither checksum is valid, the Boot ROM stays in control, and accepts commands via the PMBus interface These functions can be used to read and write to all memory locations in the UCD3138. Typically they are used to download a program to Program Flash, and to command its execution 4.2.3 Customer Boot Program As described above, it is possible to generate a user boot program using 2 kB or more of the Program Flash. This can support things which the Boot ROM does not support, including: • Program download via UART – useful especially for applications where the UCD3138 is isolated from the host (e.g., PFC) • Encrypted download – useful for code security in field updates. 4.2.4 Flash Management The UCD3138 offers a variety of features providing for easy prototyping and easy flash programming. At the same time, high levels of security are possible for production code, even with field updates. Standard firmware will be provided for storing multiple copies of system parameters in data flash. This is minimizes the risk of losing information if programming is interrupted. 4.3 System Module The System Module contains the interface logic and configuration registers to control and configure all the memory, peripherals and interrupt mechanisms. The blocks inside the system module are the address decoder, memory management controller, system management unit, central interrupt unit, and clock control unit. 4.3.1 Address Decoder (DEC) The Address Decoder generates the memory selects for the FLASH, ROM and RAM arrays. The memory map addresses are selectable through configurable register settings. These memory selects can be configured from 1 kB to 16 MB. Power on reset uses the default addresses in the memory map for ROM execution, which is then configured by the ROM code to the application setup. During access to the DEC registers, a wait state is asserted to the CPU. DEC registers are only writable in the ARM privilege mode for user mode protection. 4.3.2 Memory Management Controller (MMC) The MMC manages the interface to the peripherals by controlling the interface bus for extending the read and write accesses to each peripheral. The unit generates eight peripheral select lines with 1 kB of address space decoding. 4.3.3 System Management (SYS) The SYS unit contains the software access protection by configuring user privilege levels to memory or peripherals modules. It contains the ability to generate fault or reset conditions on decoding of illegal address or access conditions. A clock control setup for the processor clock (MCLK) speed, is also available. Copyright © 2012, Texas Instruments Incorporated Functional Overview 25 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.3.4 Central Interrupt Module (CIM) The CIM accepts 32 interrupt requests for meeting firmware timing requirements. The ARM processor supports two interrupt levels: FIQ and IRQ. FIQ is the highest priority interrupt. The CIM provides hardware expansion of interrupts by use of FIQ/IRQ vector registers for providing the offset index in a vector table. This numerical index value indicates the highest precedence channel with a pending interrupt and is used to locate the interrupt vector address from the interrupt vector table. Interrupt channel 0 has the lowest precedence and interrupt channel 31 has the highest precedence. To remove the interrupt request, the firmware should clear the request as the first action in the interrupt service routine. The request channels are maskable, allowing individual channels to be selectively disabled or enabled. Table 4-1. Interrupt Priority Table NAME MODULE COMPONENT OR DESCRIPTION PRIORITY REGISTER BRN_OUT_INT Brownout Brownout interrupt 0 (Lowest) EXT_INT External Interrupts Interrupt on external input pin 1 WDRST_INT Watchdog Control Interrupt from watchdog exceeded (reset) 2 WDWAKE_INT Watchdog Control Wakeup interrupt when watchdog equals half of set 3 watch time SCI_ERR_INT UART or SCI Control UART or SCI error Interrupt. Frame, parity or overrun 4 SCI_RX_0_INT UART or SCI Control UART0 RX buffer has a byte 5 SCI_TX_0_INT UART or SCI Control UART0 TX buffer empty 6 SCI_RX_1_INT UART or SCI Control UART1 RX buffer has a byte 7 SCI_TX_1_INT UART or SCI Control UART1 TX buffer empty 8 PMBUS_INT PMBus related interrupt 9 DIG_COMP_INT 12-bit ADC Control Digital comparator interrupt 10 “Prebias complete”, “Ramp Delay Complete”, “Ramp FE0_INT Front End 0 Complete”, “Load Step Detected”, 11 “Over-Voltage Detected”, “EADC saturated” “Prebias complete”, “Ramp Delay Complete”, “Ramp FE1_INT Front End 1 Complete”, “Load Step Detected”, 12 “Over-Voltage Detected”, “EADC saturated” “Prebias complete”, “Ramp Delay Complete”, “Ramp FE2_INT Front End 2 Complete”, “Load Step Detected”, 13 “Over-Voltage Detected”, “EADC saturated” PWM3_INT 16-bit Timer PWM 3 16-bit Timer PWM3 counter overflow or compare interrupt 14 PWM2_INT 16-bit Timer PWM 2 16-bit Timer PWM2 counter Overflow or compare 15 interrupt PWM1_INT 16-bit Timer PWM 1 16-bit Timer PWM1 counter overflow or compare interrupt 16 PWM0_INT 16-bit timer PWM 0 16-bit Timer PWM1 counter overflow or compare interrupt 17 OVF24_INT 24-bit Timer Control 24-bit Timer counter overflow interrupt 18 CAPTURE_1_INT 24-bit Timer Control 24-bit Timer capture 1 interrupt 19 COMP_1_INT 24-bit Timer Control 24-bit Timer compare 1 interrupt 20 CAPTURE_0_INT 24-bit Timer Control 24-bit Timer capture 0 interrupt 21 COMP_0_INT 24-bit Timer Control 24-bit Timer compare 0 interrupt 22 CPCC_INT Constant Power Constant Current Mode switched in CPCC module Flag needs to be read 23 for details ADC_CONV_INT 12-bit ADC Control ADC end of conversion interrupt 24 Analog comparator interrupts, Over-Voltage detection, FAULT_INT Fault Mux Interrupt Under-Voltage detection, 25 LLM load step detection 26 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Error ADC (Front End) Filter Digital PWM EAP EAN DPWMA DPWMB UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Table 4-1. Interrupt Priority Table (continued) NAME MODULE COMPONENT OR DESCRIPTION PRIORITY REGISTER DPWM3 DPWM3 Same as DPWM1 26 DPWM2 DPWM2 Same as DPWM1 27 1) Every (1-256) switching cycles DPWM1 DPWM1 2) Fault Detection 28 3) Mode switching DPWM0 DPWM0 Same as DPWM1 29 EXT_FAULT_INT External Faults Fault pin interrupt 30 SYS_SSI_INT System Software System software interrupt 31 (highest) 4.4 Peripherals 4.4.1 Digital Power Peripherals At the core of the UCD3138 controller are 3 Digital Power Peripherals (DPP). Each DPP can be configured to drive from one to eight DPWM outputs. Each DPP consists of: • Differential input error ADC (EADC) with sophisticated controls • Hardware accelerated digital 2-pole/2-zero PID based compensator • Digital PWM module with support for a variety of topologies These can be connected in many different combinations, with multiple filters and DPWMs. They are capable of supporting functions like input voltage feed forward, current mode control, and constant current/constant power, etc.. The simplest configuration is shown in the following figure: 4.4.1.1 Front End Figure 4-1 shows the block diagram of the front end module. It consists of a differential amplifier, an adjustable gain error amplifier, a high speed flash analog to digital converter (EADC), digital averaging filters and a precision high resolution set point DAC reference. The programmable gain amplifier in concert with the EADC and the adjustable digital gain on the EADC output work together to provide 9 bits of range with 6 bits of resolution on the EADC output. The output of the Front End module is a 9 bit sign extended result with a gain of 1 LSB / mV. Depending on the value of AFE selected, the resolution of this output could be either 1, 2, 4 or 8 LSBs. In addition Front End 0 has the ability to automatically select the AFE value such that the minimum resolution is maintained that still allows the voltage to fit within the range of the measurement. The EADC control logic receives the sample request from the DPWM module for initiating an EADC conversion. EADC control circuitry captures the EADC-9-bit-code and strobes the digital compensator for processing of the representative error. The set point DAC has 10 bits with an additional 4 bits of dithering resulting in an effective resolution of 14 bits. This DAC can be driven from a variety of sources to facilitate things like soft start, nested loops, etc. Some additional features include the ability to change the polarity of the error measurement and an absolute value mode which automatically adds the DAC value to the error. It is possible to operate the controller in a peak current mode control configuration. In this mode topologies like the phase shifted full bridge converter can be controlled to maintain transformer flux balance. The internal DAC can be ramped at a synchronously controlled slew rate to achieve a programmable slope compensation. This eliminates the sub-harmonic oscillation as well as improves input voltage feed-forward performance. A0 is a unity gain buffer used to isolate the peak current mode comparator. The offset of this buffer is specified in the Electrical Characteristics table. Copyright © 2012, Texas Instruments Incorporated Functional Overview 27 Submit Documentation Feedback Product Folder Link(s): UCD3138 EAP0 EAN0 DAC0 EADC 4 bit dithering gives 14 bits of effective resolution 97.65625 μV/LSB effective resolution X 6 bit ADC 8 mV/LSB Signed 9 bit result (error) 1 mV /LSB AFE_GAIN 10 bit DAC 1.5625 mV/LSB Value Dither S CPCC Filter x Ramp SAR/Prebias Absolute Value Calculation Averaging 10 bit result 1.5625 mV/LSB 2 3-AFE_GAIN Peak Current Mode Comparator Peak Current Detected A0 2 AFE_GAIN IOFFSET REA EAP EAN AGND AGND IOFFSET REA Front End Differential Amplifier UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Figure 4-1. Input Stage of EADC Module Figure 4-2. Front End Module 4.4.1.2 DPWM Module The DPWM module represents one complete DPWM channel with 2 independent outputs, A and B. Multiple DPWM modules within the UCD3138 system can be configured to support all key power topologies. DPWM modules can be used as independent DPWM outputs, each controlling one power supply output voltage rail. It can also be used as a synchronized DPWM—with user selectable phase shift between the DPWM channels to control power supply outputs with multiphase or interleaved DPWM configurations. 28 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 The output of the filter feeds the high resolution DPWM module. The DPWM module produces the pulse width modulated outputs for the power stage switches. The compensator calculates the necessary duty ratio as a 24-bit number in Q23 fixed point format (23 bit integer with 1 sign bit). This represents a value within the range 0.0 to 1.0. This duty ratio value is used to generate the corresponding DPWM output ON time. The resolution of the DPWM ON time is 250 psec. Each DPWM module can be synchronized to another module or to an external sync signal. An input SYNC signal causes a DPWM ramp timer to reset. The SYNC signal outputs—from each of the four DPWM modules—occur when the ramp timer crosses a programmed threshold. In this way the phase of the DPWM outputs for multiple power stages can be tightly controlled. The DPWM logic is probably the most complex of the Digital Peripherals. It takes the output of the compensator and converts it into the correct DPWM output for several power supply topologies. It provides for programmable dead times and cycle adjustments for current balancing between phases. It controls the triggering of the EADC. It can synchronize to other DPWMs or to external sources. It can provide synchronization information to other DPWMs or to external recipients. In addition, it interfaces to several fault handling circuits. Some of the control for these fault handling circuits is in the DPWM registers. Fault handling is covered in the Fault Mux section. Each DPWM module supports the following features: • Dedicated 14 bit time-base with period and frequency control • Shadow period register for end of period updates. • Quad-event control registers (A and B, rising and falling) (Events 1-4) – Used for on/off DPWM duty ratio updates. • Phase control relative to other DPWM modules • Sample trigger placement for output voltage sensing at any point during the DPWM cycle. • Support for 2 independent edge placement DPWM outputs (same frequency or period setting) • Dead-time between DPWM A and B outputs • High Resolution capabilities – 250 ps • Pulse cycle adjustment of up to ±8.192 μs ( 32768 × 250 ps) • Active high/ active low output polarity selection • Provides events to trigger both CPU interrupts and start of ADC12 conversions. 4.4.1.3 DPWM Events Each DPWM can control the following timing events: 1. Sample Trigger Count–This register defines where the error voltage is sampled by the EADC in relationship to the DPWM period. The programmed value set in the register should be one fourth of the value calculated based on the DPWM clock. As the DCLK (DCLK = 62.5 MHz max) controlling the circuitry runs at one fourth of the DPWM clock (PCLK = 250MHz max). When this sample trigger count is equal to the DPWM Counter, it initiates a front end calculation by triggering the EADC, resulting in a CLA calculation, and a DPWM update. Over-sampling can be set for 2, 4 or 8 times the sampling rate. 2. Phase Trigger Count–count offset for slaving another DPWM (Multi-Phase/Interleaved operation). 3. Period–low resolution switching period count. (count of PCLK cycles) 4. Event 1–count offset for rising DPWM A event. (PCLK cycles) 5. Event 2–DPWM count for falling DPWM A event that sets the duty ratio. Last 4 bits of the register are for high resolution control. Upper 14 bits are the number of PCLK cycle counts. 6. Event 3–DPWM count for rising DPWM B event. Last 4 bits of the register are for high resolution control. Upper 14 bits are the number of PCLK cycle counts. 7. Event 4–DPWM count for falling DPWM B event. Last 4 bits of the register are for high resolution control. Upper 14 bits are the number of PCLK cycle counts. 8. Cycle Adjust–Constant offset for Event 2 and Event 4 adjustments. Copyright © 2012, Texas Instruments Incorporated Functional Overview 29 Submit Documentation Feedback Product Folder Link(s): UCD3138 Start of Period Period Counter Start of Period Period Sample Trigger 1 DPWM Output A Cycle Adjust A (High Resolution) Event 2 (High Resolution) Event 1 Event 3 (High Resolution) Cycle Adjust B (High Resolution) Event 4 (High Resolution) DPWM Output B Blanking A Begin Blanking A End Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules To Other Modules Multi Mode Open Loop Events which change with DPWM mode: DPWM A Rising Edge = Event 1 DPWM A Falling Edge = Event 2 + Cycle Adjust A DPWM B Rising Edge = Event 3 DPWM B Falling Edge = Event 4 + Cycle Adjust B Phase Trigger = Phase Trigger Register value Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Basic comparisons between the programmed registers and the DPWM counter can create the desired edge placements in the DPWM. High resolution edge capability is available on Events 2, 3 and 4. The drawing above is for multi-mode, open loop. Open loop means that the DPWM is controlled entirely by its own registers, not by the filter output. In other words, the power supply control loop is not closed. 30 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 The Sample Trigger signals are used to trigger the Front End to sample input signals. The Blanking signals are used to blank fault measurements during noisy events, such as FET turn on and turn off. Additional DPWM modes are described below. 4.4.1.4 High Resolution DPWM Unlike conventional PWM controllers where the frequency of the clock dictates the maximum resolution of PWM edges, the UCD3138 DPWM can generate waveforms with resolutions as small as 250 ps. This is 16 times the resolution of the clock driving the DPWM module. This is achieved by providing the DPWM mechanism with 16 phase shifted clock signals of 250 MHz each. The high resolution section of DPWM can be enabled or disabled, also the resolution can be defined in several steps between 4ns to 250ps. This is done by setting the values of PWM_HR_MULTI_OUT_EN , HIRES_SCALE and ALL_PHASE_CLK_ENA inside the DPWM Control Register 1. See the Power Peripherals programmer’s manual for details. 4.4.1.5 Over Sampling The DPWM module has the capability to trigger an over sampling event by initiating the EADC to sample the error voltage. The default “00” configuration has the DPWM trigger the EADC once based on the sample trigger register value. The over sampling register has the ability to trigger the sampling 2, 4 or 8 times per PWM period. Thus the time the over sample happens is at the divide by 2, 4, or 8 time set in the sampling register. The “01” setting triggers 2X over sampling, the “10” setting triggers 4X over sampling, and the “11” triggers over sampling at 8X. 4.4.1.6 DPWM Interrupt Generation The DPWM has the capability to generate a CPU interrupt based on the PWM frequency programmed in the period register. The interrupt can be scaled by a divider ratio of up to 255 for developing a slower interrupt service execution loop. This interrupt can be fed to the ADC circuitry for providing an ADC12 trigger for sequence synchronization. Table 4-2 outlines the divide ratios that can be programmed. 4.4.1.7 DPWM Interrupt Scaling/Range Table 4-2. DPWM Interrupt Divide Ratio Interrupt Divide Interrupt Divide Interrupt Divide Switching Period Number of 32 MHz Setting Count Count (hex) Frames (assume 1MHz Processor Cycles loop) 1 0 00 1 32 2 1 01 2 64 3 3 03 4 128 4 7 07 8 256 5 15 0F 16 512 6 31 1F 32 1024 7 47 2F 48 1536 8 63 3F 64 2048 9 79 4F 80 2560 10 95 5F 96 3072 11 127 7F 128 4096 12 159 9F 160 5120 13 191 BF 192 6144 14 223 DF 224 7168 15 255 FF 256 8192 Copyright © 2012, Texas Instruments Incorporated Functional Overview 31 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.5 DPWM Modes of Operation The DPWM is a complex logic system which is highly configurable to support several different power supply topologies. The discussion below will focus primarily on waveforms, timing and register settings, rather than on logic design. The DPWM is centered on a period counter, which counts up from 0 to PRD, and then is reset and starts over again. The DPWM logic causes transitions in many digital signals when the period counter hits the target value for that signal. 4.5.1 Normal Mode In Normal mode, the Filter output determines the pulse width on DPWM A. DPWM B fits into the rest of the switching period, with a dead time separating it from the DPWM A on-time. It is useful for buck topologies, among others. Here is a drawing of the Normal Mode waveforms: 32 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Start of Period Period Counter Start of Period Period DPWM Output A Cycle Adjust A (High Resolution) Filter Duty (High Resolution) Event 1 Event 3 – Event 2 (High Res) Event 4 (High Res) DPWM Output B Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules Normal Mode Closed Loop Events which change with DPWM mode: DPWM A Rising Edge = Event 1 DPWM A Falling Edge = Event 1 + Filter Duty + Cycle Adjust A Adaptive Sample Trigger A = Event 1 + Filter Duty + Adaptive Sample Register or Adaptive Sample Trigger B = Event 1 + Filter Duty/2 + Adaptive Sample Register DPWM B Rising Edge = Event 1 + Filter Duty + Cycle Adjust A + (Event 3 – Event 2) DPWM B Falling Edge = Event 4 Phase Trigger = Phase Trigger Register value or Filter Duty Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End Filter controlled edge Sample Trigger 1 Blanking A Begin Blanking A End To Other Modules Adaptive Sample Trigger A Adaptive Sample Trigger B UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Cycle adjust A can be used to adjust pulse widths on individual phases of a multi-phase system. This can be used for functions like current balancing. The Adaptive Sample Triggers can be used to sample in the middle of the on-time (for an average output), or at the end of the on-time (to minimize phase delay) The Adaptive Sample Register provides an offset from the center of the on-time. This can compensate for external delays, such as MOSFET and gate driver turn on times. Copyright © 2012, Texas Instruments Incorporated Functional Overview 33 Submit Documentation Feedback Product Folder Link(s): UCD3138 Phase Shift Phase Trigger = Phase Trigger Register value or Filter Duty DPWM0 Start of Period Period Counter DPWM0 Start of Period DPWM1 Start of Period Period Counter DPWM1 Start of Period UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Blanking A-Begin and Blanking A-End can be used to blank out noise from the MOSFET turn on at the beginning of the period (DPWMA rising edge). Blanking B could be used at the turn off time of DPWMB. The other edges are dynamic, so blanking is more difficult. Cycle Adjust B has no effect in Normal Mode. 4.6 Phase Shifting In most modes, it is possible to synchronize multiple DPWM modules using the phase shift signal. The phase shift signal has two possible sources. It can come from the Phase Shift Register. This provides a fixed value, which is useful for an interleaved PFC, for example. The phase shift value can also come from the filter output. In this case, the changes in the filter output causes changes in the phase relationship of two DPWM modules. This is useful for phase shifted full bridge topologies. The following figure shows the mechanism of phase shift: 34 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Adaptive Sample Trigger B Start of Period Period Counter Start of Period Period Adaptive Sample Trigger A DPWM Output A Cycle Adjust A (High Resolution) Filter Duty (High Resolution) Event 1 To Other Modules Multi Mode Closed Loop Events which change with DPWM mode: DPWM A Rising Edge = Event 1 DPWM A Falling Edge = Event 1 + Filter Duty + Cycle Adjust A Adaptive Sample Trigger A = Event 1 + Filter Duty + Adaptive Sample Register or Adaptive Sample Trigger B = Event 1 + Filter Duty/2 + Adaptive Sample Register DPWM B Rising Edge = Event 3 DPWM B Falling Edge = Event 3 + Filter Duty + Cycle Adjust B Phase Trigger = Phase Trigger Register value or Filter Duty Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End Filter controlled edge Event 3 (High Resolution) Cycle Adjust B (High Resolution) Filter Duty (High Resolution) DPWM Output B Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules Sample Trigger 1 Blanking A Begin Blanking A End UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.7 DPWM Multiple Output Mode Multi mode is used for systems where each phase has only one driver signal. It enables each DPWM peripheral to drive two phases with the same pulse width, but with a time offset between the phases, and with different cycle adjusts for each phase. Here is a diagram for Multi-Mode: Copyright © 2012, Texas Instruments Incorporated Functional Overview 35 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Event 2 and Event 4 are not relevant in Multi mode. DPWMB can cross over the period boundary safely, and still have the proper pulse width, so full 100% pulse width operation is possible. DPWMA cannot cross over the period boundary. Since the rising edge on DPWM B is also fixed, Blanking B-Begin and Blanking B-End can be used for blanking this rising edge. And, of course, Cycle Adjust B is usable on DPWM B. 4.8 DPWM Resonant Mode This mode provides a symmetrical waveform where DPWMA and DPWMB have the same pulse width. As the switching frequency changes, the dead times between the pulses remain the same. The equations for this mode are designed for a smooth transition from PWM mode to resonant mode, as described in the LLC Example section. Here is a diagram of this mode: 36 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Start of Period Period Counter Start of Period Filter Period Adaptive Sample Trigger A Sample Trigger 1 DPWM Output A Filter Duty – Average Dead Time Event 1 Event 3 - Event 2 Period Register – Event 4 DPWM Output B Blanking A Begin Blanking A End Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules To Other Modules Resonant Symmetrical Closed Loop Events which change with DPWM mode: Dead Time 1 = Event 3 – Event 2 Dead Time 2 = Event 1 + Period Register – Event 4) Average Dead Time = (Dead Time 1 + Dead Time 2)/2 DPWM A Rising Edge = Event 1 DPWM A Falling Edge = Event 1 + Filter Duty – Average Dead Time Adaptive Sample Trigger A = Event 1 + Filter Duty + Adaptive Sample Register Adaptive Sample Trigger B = Event 1 + Filter Duty/2 + Adaptive Sample Register DPWM B Rising Edge = Event 1 + Filter Duty – Average Dead Time + (Event 3 – Event 2) DPWM B Falling Edge = Filter Period – (Period Register – Event 4) Phase Trigger = Phase Trigger Register value or Filter Duty Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End Filter controlled edge Adaptive Sample Trigger B UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 The Filter has two outputs, Filter Duty and Filter Period. In this case, the Filter is configured so that the Filter Period is twice the Filter Duty. So if there were no dead times, each DPWM pin would be on for half of the period. For dead time handling, the average of the two dead times is subtracted from the Filter Duty for both DPWM pins. Therefore, both pins will have the same on-time, and the dead times will be fixed regardless of the period. The only edge which is fixed relative to the start of the period is the rising edge of DPWM A. This is the only edge for which the blanking signals can be used easily. Copyright © 2012, Texas Instruments Incorporated Functional Overview 37 Submit Documentation Feedback Product Folder Link(s): UCD3138 Start of Period Period Counter Start of Period Period Sample Trigger 1 DPWM Output A Filter Duty/2 (High Resolution) Period/2 DPWM Output B Blanking A Begin Blanking A End Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules To Other Modules Triangular Mode Closed Loop Events which change with DPWM mode: DPWM A Rising Edge = None DPWM A Falling Edge = None Adaptive Sample Trigger = None DPWM B Rising Edge = Period/2 - Filter Duty/2 + Cycle Adjust A DPWM B Falling Edge = Period/2 + Filter Duty/2 + Cycle Adjust B Phase Trigger = Phase Trigger Register value or Filter Duty Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End Filter controlled edge Cycle Adjust A (High Resolution) Cycle Adjust B (High Resolution) UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.9 Triangular Mode Triangular mode provides a stable phase shift in interleaved PFC and similar topologies. In this case, the PWM pulse is centered in the middle of the period, rather than starting at one end or the other. In Triangular Mode, only DPWM-B is available. Here is a diagram for Triangular Mode: All edges are dynamic in triangular mode, so fixed blanking is not that useful. The adaptive sample trigger is not needed. It is very easy to put a fixed sample trigger exactly in the center of the FET on-time, because the center of the on-time does not move in this mode. 38 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.10 Leading Edge Mode Leading edge mode is very similar to Normal mode, reversed in time. The DPWM A falling edge is fixed, and the rising edge moves to the left, or backwards in time, as the filter output increases. The DPWM B falling edge stays ahead of the DPWMA rising edge by a fixed dead time. Here is a diagram of the Leading Edge Mode: Copyright © 2012, Texas Instruments Incorporated Functional Overview 39 Submit Documentation Feedback Product Folder Link(s): UCD3138 Start of Period Period Counter Start of Period Period Adaptive Sample Trigger B Sample Trigger 1 DPWM Output A Cycle Adjust A (High Resolution) Filter Duty (High Resolution) Event 1 Event 2 - Event 3 (High Resolution) Event 4 (High Resolution) DPWM Output B Blanking A Begin Blanking A End Blanking B Begin Blanking B End Phase Trigger Sample Trigger 2 To Other Modules To Other Modules Leading Edge Closed Loop Events which change with DPWM mode: DPWM A Falling Edge = Event 1 DPWM A Rising Edge = Event 1 - Filter Duty + Cycle Adjust A Adaptive Sample Trigger A = Event 1 - Filter Duty + Adaptive Sample Register or Adaptive Sample Trigger B = Event 1 - Filter Duty/2 + Adaptive Sample Register DPWM B Rising Edge = Event 4 DPWM B Falling Edge = Event 1 - Filter Duty + Cycle Adjust A -(Event 2 – Event 3) Phase Trigger = Phase Trigger Register value or Filter Duty Events always set by their registers, regardless of mode: Sample Trigger 1, Sample Trigger 2, Blanking A Begin, Blanking A End, Blanking B Begin, Blanking B End Adaptive Sample Trigger A UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com As in the Normal mode, the two edges in the middle of the period are dynamic, so the fixed blanking intervals are mainly useful for the edges at the beginning and end of the period. 40 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 DPWM3B (QT1) DPWM2A (QT2) DPWM2B (QB2) VTrans DPWM0B (QSYN2,4) DPWM1B (QSYN1,3) IPRI DPWM3A (QB1) UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.11 Sync FET Ramp and IDE Calculation The UCD3138 has built in logic for controlling MOSFETs for synchronous rectification (Sync FETs). This comes in two forms: • Sync FET ramp • Ideal Diode Emulation (IDE) calculation When starting up a power supply, sometimes there is already a voltage on the output – this is called prebias. It is very difficult to calculate the ideal Sync FET on-time for this case. If it is not calculated correctly, it may pull down the pre-bias voltage, causing the power supply to sink current. To avoid this, Sync FETs are not turned on until after the power supply has ramped up to the nominal voltage. The Sync FETs are turned on gradually in order to avoid an output voltage glitch. The Sync FET Ramp logic can be used to turn them on at a rate below the bandwidth of the filter. In discontinuous mode, the ideal on-time for the Sync FETs is a function of Vin, Vout, and the primary side duty cycle (D). The IDE logic in the UCD3138 takes Vin and Vout data from the firmware and combines it with D data from the filter hardware. It uses this information to calculate the ideal on-time for the Sync FETs. 4.12 Automatic Mode Switching Automatic Mode switching enables the DPWM module to switch between modes automatically, with no firmware intervention. This is useful to increase efficiency and power range. The following paragraphs describe phase-shifted full bridge and LLC examples: 4.12.1 Phase Shifted Full Bridge Example In phase shifted full bridge topologies, efficiency can be increased by using pulse width modulation, rather than phase shift, at light load. This is shown below: Copyright © 2012, Texas Instruments Incorporated Functional Overview 41 Submit Documentation Feedback Product Folder Link(s): UCD3138 Q1B Q1T QSR1 QSR2 fs< fr fr fs= fr_max fs> fr PWM Mode LLC Mode Tr= 1/fr Tr= 1/fr ISEC(t ) SynFET Primary QT1 QB1 Lr ISOLATED GATE Transformer SYNCHRONOUS GATE DRIVE PRIM CURRENT VOUT +12V T1 T1 ORING CTL VA VBUS QT2 QB2 D1 D2 T2 L1 Q5 C1 RL C2 R2 Q6 Q7 I_SHARE Vout Iout I_pri temp Vin VA UCD 3138 ARM7 FAULT 0 AD01 AD02/CMP0 AD03/CMP1/CMP2 AD04/CMP3 AD05/CMP4 AD00 AD06/CMP5 FAULT 1 FAULT 2 GPIO2 GPIO3 GPIO1 AD07/CMP6 AD08 AD09 DPWM0B DPWM1B DPWM2A DPWM2B ORING_CRTL P_GOOD DPWM3A DPWM3B Vout ON/OFF FAILURE ACFAIL_OUT ACFAIL_IN I_pri Iout EADC0 EADC1 CLA0 CLA1 EADC2 DPWM0 DPWM1 DPWM2 DPWM3 Duty for mode switching Vref Load Current PCM CBC < DPWM3A DPWM3B DPWM2A DPWM2B DPWM0B DPWM1B CPCC PMBus UART1 UART0 Primary OSC WD RST Memory FAULT Current Sensing I_pri UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Figure 4-3. Secondary-Referenced Phase-Shifted Full Bridge Control With Synchronous Rectification 4.12.2 LLC Example In LLC, three modes are used. At the highest frequency, a pulse width modulated mode (Multi Mode) is used. As the frequency decreases, resonant mode is used. As the frequency gets still lower, the synchronous MOSFET drive changes so that the on-time is fixed and does not increase. In addition, the LLC control supports cycle-by-cycle current limiting. This protection function operates by a comparator monitoring the maximum current during the DPWMA conduction time. Any time this current exceeds the programmable comparator reference the pulse is immediately terminated. Due to classic instability issues associated with half-bridge topologies it is also possible to force DPWMB to match the truncated pulse width of DPWMA. Here are the waveforms for the LLC: 42 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Q1T CRES CRES LM LK Q1B VBUS VBUS Transformer COUT1 QSR1 QSR2 LRES DPWM0A DPWM0B DPWM1A DPWM1B Driver Driver Driver Driver RS RS1 RS2 CS RF2 CF RF1 RLRES ESR1 COUT2 ESR2 EAP0 EAN0 NP NS NS AD04 ADC13 EAP1 AD03 Oring Circuitry VOUT ILR(t) ILM(t) ISEC(t) VCR(t) VOUT(t) Rectifier and filter UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Figure 4-4. Secondary-Referenced Half-Bridge Resonant LLC Control With Synchronous Rectification Copyright © 2012, Texas Instruments Incorporated Functional Overview 43 Submit Documentation Feedback Product Folder Link(s): UCD3138 Filter Duty Low – Lower Threshold High – Lower Threshold Control Register 1 Auto Config High Auto Config Mid High – Upper Threshold Low – Upper Threshold 0 Full Range Automatic Mode Switching With Hysteresis UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.12.3 Mechanism for Automatic Mode Switching The UCD3138 allows the customer to enable up to two distinct levels of automatic mode switching. These different modes are used to enhance light load operation, short circuit operation and soft start. Many of the configuration parameters for the DPWM are in DPWM Control Register 1. For automatic mode switching, some of these parameters are duplicated in the Auto Config Mid and Auto Config High registers. If automatic mode switching is enabled, the filter duty signal is used to select which of these three registers is used. There are 4 registers which are used to select the points at which the mode switching takes place. They are used as shown below. As shown, the registers are used in pairs for hysteresis. The transition from Control Register 1 to Auto Config Mid only takes place when the Filter Duty goes above the Low Upper threshold. It does not go back to Auto Config Mid until the Low Lower Threshold is passed. This prevents oscillation between modes if the filter duty is close to a mode switching point. 44 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 A ON SELECT A OFF SELECT B ON SELECT B OFF SELECT EGEN A EGEN B EDGE GEN PWM A PWM B B SELECT A SELECT INTRAMUX A/B/C (N) A/B/C (N+1) C (N+2) C (N+3) A(N) B(N) A(N+1) B(N+1) UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.13 DPWMC, Edge Generation, IntraMux The UCD3138 has hardware for generating complex waveforms beyond the simple DPWMA and DPWMB waveforms already discussed – DPWMC, the Edge Generation Module, and the IntraMux. DPWMC is a signal inside the DPWM logic. It goes high at the Blanking A begin time, and low at the Blanking A end time. The Edge Gen module takes DPWMA and DPWMB from its own DPWM module, and the next one, and uses them to generate edges for two outputs. For DPWM3, the DPWM0 is considered to be the next DPWM. Each edge (rising and falling for DPWMA and DPWMB) has 8 options which can cause it. The options are: 0 = DPWM(n) A Rising edge 1 = DPWM(n) A Falling edge 2 = DPWM(n) B Rising edge 3 = DPWM(n) B Falling edge 4 = DPWM(n+1) A Rising edge 5 = DPWM(n+1) A Falling edge 6 = DPWM(n+1) B Rising edge 7 = DPWM(n+1) B Falling edge Where “n" is the numerical index of the DPWM module of interest. For example n=1 refers to DPWM1. The Edge Gen is controlled by the DPWMEDGEGEN register. It also has an enable/disable bit. The IntraMux is controlled by the Auto Config registers. Intra Mux is short for intra multiplexer. The IntraMux takes signals from multiple DPWMs and from the Edge Gen and combines them logically to generate DPWMA and DPWMB signals This is useful for topologies like phase-shifted full bridge, especially when they are controlled with automatic mode switching. Of course, it can all be disabled, and DPWMA and DPWMB will be driven as described in the sections above. If the Intra Mux is enabled, high resolution must be disabled, and DPWM edge resolution goes down to 4 ns. Here is a drawing of the Edge Gen/Intra Mux: Here is a list of the IntraMux modes for DPWMA: 0 = DPWMA(n) pass through (default) 1 = Edge-gen output, DPWMA(n) 2 = DPWNC(n) 3 = DPWMB(n) (Crossover) 4 = DPWMA(n+1) Copyright © 2012, Texas Instruments Incorporated Functional Overview 45 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 5 = DPWMB(n+1) 6 = DPWMC(n+1) 7 = DPWMC(n+2) 8 = DPWMC(n+3) and for DPWMB: 0 = DPWMB(n) pass through (default) 1 = Edge-gen output, DPWMB(n) 2 = DPWNC(n) 3 = DPWMA(n) (Crossover) 4 = DPWMA(n+1) 5 = DPWMB(n+1) 6 = DPWMC(n+1) 7 = DPWMC(n+2) 8 = DPWMC(n+3) The DPWM number wraps around just like the Edge Gen unit. For DPWM3 the following definitions apply: DPWM(n) DPWM3 DPWM(n+1) DPWM0 DPWM(n+2) DPWM1 DPWM(n+3) DPWM2 4.14 Filter The UCD3138 filter is a PID filter with many enhancements for power supply control. Some of its features include: • Traditional PID Architecture • Programmable non-linear limits for automated modification of filter coefficients based on received EADC error • Multiple coefficient sets fully configurable by firmware • Full 24-bit precision throughout filter calculations • Programmable clamps on integrator branch and filter output • Ability to load values into internal filter registers while system is running • Ability to stall calculations on any of the individual filter branches • Ability to turn off calculations on any of the individual filter branches • Duty cycle, resonant period, or phase shift generation based on filter output. • Flux balancing • Voltage feed forward 46 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 P I 26 D 24 All are S0.23 24 + 24 Saturate Yn S2.23 S0.23 24 Shifter S0.23 24 Yn Scale Clamp S0.23 24 Filter Yn Clamp High Filter Yn Clamp Low Filter Yn X 24 24 24 Ki_yn reg Kp Coef Xn-1 Reg Xn 16 24 <> 9 9 16 24 24 24 24 24 24 Clamp Kd yn_reg Kd alpha 9 16 9 24 24 24 24 P I D Limit Comparator PID Filter Branch Stages Ki High EADC_DATA 9 9 9 9 24 32 Ki Coef Kd coef Limit 5 9 9 Limit 6 ….. Limit 0 Coefficient select Ki Low Optional Selected by KI_ADDER_ MODE Clamp X X X + - + + Round X X +1 n n – UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Here is the first section of the Filter : The filter input, Xn, generally comes from a front end. Then there are three branches, P, I. and D. Note that the D branch also has a pole, Kd Alpha. Clamps are provided both on the I branch and on the D alpha pole. The filter also supports a nonlinear mode, where up to 7 different sets of coefficients can be selected depending on the magnitude of the error input Xn. This can be used to increase the filter gain for higher errors to improve transient response. Here is the output section of the filter (S0.23 means that there is 1 sign bit, 0 integer bits and 23 fractional bits).: This section combines the P, I, and D sections, and provides for saturation, scaling, and clamping. Copyright © 2012, Texas Instruments Incorporated Functional Overview 47 Submit Documentation Feedback Product Folder Link(s): UCD3138 18 24 14 38 18 KCompx DPWMx Period Loop_VFF Filter YN (Duty %) Filter Duty S0.23 14.0 14.0 14.0 14.0 S14.23 Resonant Duty 14.0 Round to 18 bits, Clamp to Positive Clamp Filter Output Clamp High Filter Output Clamp Low X 14.4 14.4 OUTPUT_MULT_SEL 14 Bits [17:4] Filter Period 24 14 38 18 KCompx DPWMx Period Filter YN S0.23 14.0 14.0 14.0 S14.23 Round to 18 bits, Clamp to Positive Truncate X low 4 bits 14.0 PERIOD_MULT_SEL 14.4 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com There is a final section for the filter, which permits its output to be matched to the DPWM: This permits the filter output to be multiplied by a variety of correction factors to match the DPWM Period, to provide for Voltage Feed Forward, or for other purposes. After this, there is another clamp. For resonant mode, the filter can be used to generate both period and duty cycle. 4.14.1 Loop Multiplexer The Loop Mux controls interconnections between the filters, front ends, and DPWMs. Any filter, front end, and DPWM can be combined with each other in many configurations. It also controls the following connections: • DPWM to Front End • Front End DAC control from Filters or Constant Current/Constant Power Module • Filter Special Coefficients and Feed Forward • DPWM synchronization • Filter to DPWM The following control modules are configured in the Loop Mux: • Constant Power/Constant Current • Cycle Adjustment (Current and flux balancing) • Global Period • Light Load (Burst Mode) • Analog Peak Current Mode 48 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 FAULT - CBC FAULT - AB FAULT -A DCOMP– 4X EXT GPIO– 4X ACOMP– 7X FAULT -B FAULT MODULE FAULT MODULE FAULT MODULE CYCLE BY CYCLE AB FLAG AB FLAG A FLAG B FLAG FAULT MUX ALL_FAULT_EN DPWM_EN DPWM CBC_FAULT_EN CBC_PWM_AB_EN FAULT MODULE ANALOG PCM Bit20 in DPWMCTRL0 Bit30 in DPWMFLTCTRL Bit 31 in DPWMFLTCTRL Bit0 in DPWMCTRL0 DISABLE PWM A AND B DISABLE PWM A AND B DISABLE PWM A ONLY DISABLE PWM B ONLY UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.14.2 Fault Multiplexer In order to allow a flexible way of mapping several fault triggering sources to all the DPWMs channels, the UCD3138 provides an extensive array of multiplexers that are united under the name Fault Mux module. The Fault Mux Module supports the following types of mapping between all the sources of fault and all different fault response mechanism inside each DPWM module. • Many fault sources mapped to a single fault response mechanism. For instance an analog comparator in charge of over voltage protection, a digital comparator in charge of over current protection and an external digital fault pin can be all mapped to a fault-A signal connected to a single FAULT MODULE and shut down DPWM1-A. • A single fault source can be mapped to many fault response mechanisms inside many DPWM modules. For instance an analog comparator in charge of over current protection can be mapped to DPWM-0 through DPWM-3 by way of several fault modules. • Many fault sources can be mapped to many fault modules inside many DPWM modules. Copyright © 2012, Texas Instruments Incorporated Functional Overview 49 Submit Documentation Feedback Product Folder Link(s): UCD3138 CYCLE BY CYCLE FAULT - CBC CLIM FAULT MODULE FAULT IN FAULT FLAG MAX COUNT FAULT EN DPWM EN UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com The Fault Mux Module provides a multitude of fault protection functions within the UCD3138 high-speed loop (Front End Control, Filter, DPWM and Loop Mux modules). The Fault Mux Module allows highly configurable fault generation based on digital comparators, high-speed analog comparators and external fault pins. Each of the fault inputs to the DPWM modules can be configured to one or any combination of the fault events provided in the Fault Mux Module. Each one of the DPWM engines has four fault modules. The modules are called CBC fault module, AB fault module, A fault module and B fault module. The internal circuitry in all the four fault modules is identical, and the difference between the modules is limited to the way the modules are attached to the DPWMs. All fault modules provide immediate fault detection but only once per DPWM switching cycle. Each one of the fault modules own a separate max_count and the fault flag will be set only if sequential cycle-by-cycle faults count exceeds max_count. Once the fault flag is set DPWMs need to be disabled by DPWM_EN going low in order to clear the fault flags. Please note, all four Fault Modules share the same DPWM_EN control, all fault flags (output of Fault Modules) will be cleared simultaneously. All four Fault Modules share the same global FAULT_EN as well. Therefore a specific Fault Module cannot be enabled/ disabled separately. Unlike Fault Modules, only one Cycle by Cycle block is available in each DPWM module. The Cycle by Cycle block works in conjunction with CBC Fault Module and enables DPWM reaction to signals arriving from Analog Peak current mode (PCM) module. The Fault Mux Module supports the following basic functions: • 4 digital comparators with programmable thresholds and fault generation • Configuration for 7 high speed analog comparators with programmable thresholds and fault generation • External GPIO detection control with programmable fault generation • Configurable DPWM fault generation for DPWM Current Limit Fault, DPWM Over-Voltage Detection Fault, DPWM A External Fault, DPWM B External Fault and DPWM IDE Flag • Clock Failure Detection for High and Low Frequency Oscillator blocks • Discontinuous Conduction Mode Detection 50 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 Digital Comparator 0 Control Digital Comparator 1 Control Digital Comparator 2 Control Digital Comparator 3 Control Front End Control 0 Front End Control 1 Front End Control 2 Analog Comparator 0 Analog Comparator 0 Control Analog Comparator 1 Analog Comparator 1 Control Analog Comparator 2 Analog Comparator 2 Control Analog Comparator 3 Analog Comparator 3 Control Analog Comparator 4 Analog Comparator 4 Control Analog Comparator 5 Analog Comparator 5 Control Analog Comparator 6 Analog Comparator 6 Control External GPIO Detection fault[2:0] DPWM 0 DPWM 1 DPWM 2 DPWM 3 DPWM 0 Fault Control DPWM 1 Fault Control DPWM 2 Fault Control DPWM 3 Fault Control Analog Comparator Automated Ramp DCM Detection HFO/LFO Fail Detect UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Figure 4-5. Fault Mux Block Diagram 4.15 Communication Ports 4.15.1 SCI (UART) Serial Communication Interface A maximum of two independent Serial Communication Interface (SCI) or Universal Asynchronous Receiver/Transmitter pre-scaler (UART) interfaces are included within the device for asynchronous startstop serial data communication (see the pin out sections for details) Each interface has a 24 bit for supporting programmable baud rates and has programmable data word and stop bit options. Half or full duplex operation is configurable through register bits. A loop back feature can also be setup for firmware verification. Both SCI-TX and SCI-RX pin sets can be used as GPIO pins when the peripheral is not being used. 4.15.2 PMBUS The PMBus Interface supports independent master and slave modes controlled directly by firmware through a processor bus interface. Individual control and status registers enable firmware to send or receive I2C, SMBus or PMBus messages in any of the accepted protocols, in accordance with the I2C Specification, SMBus Specification (Version 2.0) and the PMBUS Power System Management Protocol Specification. The PMBus interface is controlled through a processor bus interface, utilizing a 32-bit data bus and 6-bit address bus. The PMBus interface is connected to the expansion bus, which features 4 byte write enables, a peripheral select dedicated for the PMBus interface, separated 32-bit data buses for reading and writing of data and active-low write and output enable control signals. In addition, the PMBus Interface connects directly to the I2C/SMBus/PMBus Clock, Data, Alert, and Control signals. Example: PMBus Address Decode via ADC12 Reading The user can allocate 2 pins of the 12-bit ADC input channels, AD_00 and AD_01, for PMBus address decoding. At power-up the device applies IBIAS to each address detect pin and the voltage on that pin is captured by the internal 12-bit ADC. Where bin(VAD0x) is the address bin for one of 12 address as shown in Figure 4-6. Copyright © 2012, Texas Instruments Incorporated Functional Overview 51 Submit Documentation Feedback Product Folder Link(s): UCD3138 Vdd IBIAS To ADC Mux On/Off Control AD00, AD01 pin Resistor to set PMBus Address UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com Figure 4-6. PMBus Address Detection Method 4.15.3 General Purpose ADC12 The ADC12 is a 12 bit, high speed analog to digital converter, equipped with the following options: • Typical conversion speed of 267 ksps • Conversions can consist from 1 to 16 ADC channel conversions in any desired sequence • Post conversion averaging capability, ranging from 4X, 8X, 16X or 32X samples • Configurable triggering for ADC conversions from the following sources: firmware, DPWM rising edge, ADC_EXT_TRIG pin or Analog Comparator results • Interrupt capability to embedded processor at completion of ADC conversion • Six digital comparators on the first 6 channels of the conversion sequence using either raw ADC data or averaged ADC data • Two 10 μA current sources for excitation of PMBus addressing resistors • Dual sample and hold for accurate power measurement • Internal temperature sensor for temperature protection and monitoring The control module ( ADC12 Contol Block Diagram) contains the control and conversion logic for autosequencing a series of conversions. The sequencing is fully configurable for any combination of 16 possible ADC channels through an analog multiplexer embedded in the ADC12 block. Once converted, the selected channel value is stored in the result register associated with the sequence number. Input channels can be sampled in any desired order or programmed to repeat conversions on the same channel multiple times during a conversion sequence. Selected channel conversions are also stored in the result registers in order of conversion, where the result 0 register is the first conversion of a 16-channel sequence and result 15 register is the last conversion of a 16-channel sequence. The number of channels converted in a sequence can vary from 1 to 16. Unlike EADC0 through EADC2, which are primarily designed for closing high speed compensation loops, the ADC12 is not usually used for loop compensation purposes. The EADC converters have a substantially faster conversion rate, thus making them more attractive for closed loop control. The ADC12 features make it best suited for monitoring and detection of currents, voltages, temperatures and faults. Please see the Typical Characteristics plots for the temperature variation associated with this function. 52 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 ADC Channels S/H 12-bit SAR ADC ADC12 Block ADC12 Control ADC Channel ADC Averaging Digital Comparators DPWM Modules ADC12 Registers Analog Comparators ADC External Trigger (from pin) UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Figure 4-7. ADC12 Control Block Diagram 4.15.4 Timers External to the Digital Power Peripherals there are 3 different types of timers in UCD3138. They are the 24-bit timer, 16-bit timer and the Watchdog timer 4.15.4.1 24-bit PWM Timer There is one 24 bit counter PWM timer which runs off the Interface Clock and can further be divided down by an 8-bit pre-scalar to generate a slower PWM time period. The timer has two compare registers (Data Registers) for generating the PWM set/unset events. Additionally, the timer has a shadow register (Data Buffer register) which can be used to store CPU updates of the compare events while still using the timer. The selected shadow register update mode happens after the compare event matches. The two capture pins TCMP0 and TCMP1 are inputs for recording a capture event. A capture event can be set either to rising, falling, or both edges of the capture pin. Upon this event, the counter value is stored in the corresponding capture data register. The counter reset can be configured to happen on a counter roll over, a compare equal event, or by software controlled register. Five Interrupts from the PWM timer can be set, which are the counter rollover event (overflow), either capture event 0 or 1, or the two comparison match events. Each interrupt can be disabled or enabled. Upon an event comparison on only the second event, the TCMP pin can be configured to set, clear, toggle or have no action at the output. The value of PWM pin output can be read for status or simply configured as general purpose I/O for reading the value of the input at the pin. The first compare event can only be used as an interrupt. Copyright © 2012, Texas Instruments Incorporated Functional Overview 53 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 4.15.4.2 16-Bit PWM Timers There are four 16 bit counter PWM timers which run off the Interface Clock and can further be divided down by a 8-bit pre-scaler to generate slower PWM time periods. Each timer has two compare registers (Data Registers) for generating the PWM set/unset events. Additionally, each timer has a shadow register (Data Buffer register) which can be used to store CPU updates of compare events while still using the timer. The selected shadow register update mode happens after the compare event matches. The counter reset can be configured to happen on a counter roll over, a compare equal event, or by a software controlled register. Interrupts from the PWM timer can be set due to the counter rollover event (overflow) or by the two comparison match events. Each comparison match and the overflow interrupts can be disabled or enabled. Upon an event comparison, the PWM pin can be configured to set, clear, toggle or have no action at the output. The value of PWM pin output can be read for status or simply configured as General Purpose I/O for reading the value of the input at the pin. 4.15.4.3 Watchdog Timer A watchdog timer is provided on the device for ensuring proper firmware loop execution. The timer is clocked off of a separate low speed oscillator source. If the timer is allowed to expire, a reset condition is issued to the ARM processor. The watchdog is reset by a simple CPU write bit to the watchdog key register by the firmware routine. On device power-up the watchdog is disabled. Yet after it is enabled, the watchdog cannot be disabled by firmware. Only a device reset can put this bit back to the default disabled state. A half timer flag is also provided for status monitoring of the watchdog. 4.16 Miscellaneous Analog The Miscellaneous Analog Control (MAC) Registers are a catch-all of registers that control and monitor a wide variety of functions. These functions include device supervisory features such as Brown-Out and power saving configuration, general purpose input/output configuration and interfacing, internal temperature sensor control and current sharing control. The MAC module also provides trim signals to the oscillator and AFE blocks. These controls are usually used at the time of trimming at manufacturing; therefore this document will not cover these trim controls. The MAC registers and peripherals are all available in the UCD3138 (64 pin version). Other UCD3138 devices may have reduced resources. See the device pin out description for details. 4.17 Package ID Information Package ID register includes information regarding the package type of the device and can be read by firmware for reporting through PMBus or for other package sensitive decisions. BIT NUMBER 1:0 Bit Name PKG_ID Access R/W Default 0 – UCD3138RGC, 1 – UCD3138RHA 4.18 Brownout Brownout function is used to determine if the device supply voltage is lower than a threshold voltage, a condition that may be considered unsafe for proper operation of the device. The brownout threshold is higher than the reset threshold voltage; therefore, when the supply voltage is lower than brownout threshold, it still does not necessarily trigger a device reset. The brownout interrupt flag can be polled or alternatively can trigger an interrupt to service such case by an interrupt service routine. Please see the Power On Reset (POR) / Brown Out Reset (BOR) section. 54 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.19 Global I/O Up to 30 pins in UCD3138 can be configured to serve as a general purpose input or output pin (GPIO). This includes all digital input or output pins except for the RESET pin. The pins that cannot be configured as GPIO pins are the supply pins, ground pins, ADC-12 analog input pins, EADC analog input pins and the RESET pin. There are two ways to configure and use the digital pins as GPIO pins: 1. Through the centralized Global I/O control registers. 2. Through the distributed control registers in the specific peripheral that shares it pins with the standard GPIO functionality. The Global I/O registers offer full control of: 1. Configuring each pin as a GPIO. 2. Setting each pin as input or output. 3. Reading the pin’s logic state, if it is configured as an input pin. 4. Setting the logic state of the pin, if it is configured as an output pin. 5. Connecting pin/pins to high rail through internal pull up resistors. The Global I/O registers include Global I/O EN register, Global I/O OE Register, Global I/O Open Drain Control Register, Global I/O Value Register and Global I/O Read Register. The following is showing the format of Global I/O EN Register (GLBIOEN) as an example: BIT NUMBER 29:0 Bit Name GLOBAL_IO_EN Access R/W Default 00_0000_0000_0000_0000_0000_0000_0000 Bits 29-0: GLOBAL_IO_EN – This register enables the global control of digital I/O pins 0 = Control of IO is done by the functional block assigned to the IO (Default) 1 = Control of IO is done by Global IO registers. PIN NUMBER BIT PIN_NAME UCD3138-64 PIN UCD3138-40 PIN 29 FAULT[3] 43 NA 28 ADC_EXT_TRIG 12, 26 8 27 TCK 37 21 26 TDO 38 20 25 TMS 40 24 24 TDI 39 23 23 SCI_TX[1] 29 NA 22 SCI_TX[0] 14 22 21 SCI_RX[1] 30 NA 20 SCI_RX[0] 13 23 19 TMR_CAP 12, 26, 41 8, 21 18 TMR_PWM[1] 32 NA 17 TMR_PWM[0] 12, 26, 31, 37 21 16 PMBUS-CLK 15 9 15 PMBUS-DATA 16 10 14 CONTROL 30 20 13 ALERT 29 19 12 EXT_INT 26, 34 NA Copyright © 2012, Texas Instruments Incorporated Functional Overview 55 Submit Documentation Feedback Product Folder Link(s): UCD3138 Temperature Sensor Ch14 ADC 12 Temp Cal UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com PIN NUMBER BIT PIN_NAME UCD3138-64 PIN UCD3138-40 PIN 11 FAULT[2] 42 25 10 FAULT[1] 36 23 9 FAULT[0] 35, 39 22 8 SYNC 12, 26,37 8, 21 7 DPWM3B 24 18 6 DPWM3A 23 17 5 DPWM2B 22 16 4 DPWM2A 21 15 3 DPWM1B 20 14 2 DPWM1A 19 13 1 DPWM0B 18 12 0 DPWM0A 17 11 4.20 Temperature Sensor Control Temperature sensor control register provides internal temperature sensor enabling and trimming capabilities. The internal temperature sensor is disabled as default. Figure 4-8. Internal Temp Sensor Temperature sensor is calibrated at room temperature (25 °C) via a calibration register value. The temperature sensor is measured using ADC12 (via Ch14). The temperature is then calculated using a mathematical formula involving the calibration register (this effectively adds a delta to the ADC measurement). The temperature sensor can be enabled or disabled. 4.21 I/O Mux Control In different packages of UCD3138 several I/O functions are multiplexed and routed toward a single physical pin. I/O Mux Control register may be used in order to choose a single specific functionality that is desired to be assigned to a physical device pin for your application. 56 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 EXT CAP AD02 400 Ω Digital RSHARE 250 Ω 3.3 V ISHARE ADC12 and CMP ESD ESD 3.2 kΩ 250 Ω ESD AD13 3.3V SW2 SW1 SW3 3.3 V ADC12 and CMP UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 4.21.1 JTAG Use for I/O and JTAG Security The UCD3138 provides a JTAG interface for debugging and for uploading data and programs. The pins are multiplexed with other pins, and will not be available in certain topologies. For power supplies, other debugging techniques (PMBus, UART, code instrumentation) are often superior to JTAG. Code downloading is much faster via PMBus, or with a user boot program via UART. PMBus support is available from TI. JTAG for debugging has limited support from TI’s Code Composer Studio. JTAG parameter download may be supported by third parties. 4.22 Current Sharing Control UCD3138 provides three separate modes of current sharing operation. • Analog bus current sharing • PWM bus current sharing • Master/Slave current sharing • AD02 has a special ESD protection mechanism that prevents the pin from pulling down the currentshare bus if power is missing from the UCD3138 The simplified current sharing circuitry is shown in the drawing below: Figure 4-9. Simplified Current Sharing Circuitry CURRENT SHARING MODE FOR TEST ONLY, CS_MODE EN_SW1 EN_SW2 DPWM ALWAYS KEEP 00 Off or Slave Mode (3-state) 00 00 (default) 0 0 0 PWM Bus 00 01 1 0 ACTIVE Off or Slave Mode (3-state) 00 10 0 0 0 Analog Bus or Master 00 11 0 1 0 Copyright © 2012, Texas Instruments Incorporated Functional Overview 57 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com The period and the duty of 8-bit PWM current source and the state of the SW1 and SW2 switches can be controlled through the current sharing control register (CSCTRL). 4.23 Temperature Reference The temperature reference register (TEMPREF) provides the ADC12 count when ADC12 measures the internal temperature sensor (channel 14) during the factory trim and calibration. This information can be used by different periodic temperature compensation routines implemented in the firmware. But it should not be overwritten by firmware, otherwise this factory written value will be lost. 58 Functional Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 2 .2 μF 1 .0 μF BPCAP DGND V33D UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 5 IC Grounding and Layout Recommendations • Two grounds are recommended: AGND (analog) and DGND (digital). – AGND plane should be on a different layer than DGND, and right under the UCD3138 device. – UCD3138 power pad should be tied to AGND plane by at least 4 vias – AGND plane should be just large enough to connect to all required components. – Power ground (PGND) can be independent or combined with DGND – The power pad of the driver IC should be tied to DGND • Both 3.3VD and 3.3VA should have a local 4.7μF capacitor placed as close as possible to the device pins • BPCAP decoupling (2.2 μF typically) MUST be connected to DGND • All analog signal filter capacitors should be tied to AGND – If the gate driver device, such as UCD27524 or UCD27511/7 driver is used, the filter capacitor for the current sensing pin can be tied to DGND for easy layout • All digital signals, such as GPIO, PMBus and PWM are referenced to DGND. • The RESET pin capacitor (0.1μF) should be connected to either DGND or AGND locally. A 10kΩ pullup resistor to 3.3V is recommended. • All filter and decoupling capacitors should be placed close to UCD3138 as possible – Resistor placement is less critical and can be moved a little further away • The DGND and AGND net-short resistor MUST be placed right between one UCD3138’s DGND pin and one AGND pin. Ground connections to the net short element should be made by a large via (or multiple paralleled vias) for each terminal of the net-short element. • If a gate driver device such as UCC27524 or UCC27511/7 is on the control card and there is a PGND connection, a net-short resistor should be tied to the DGND plane and PGND plane by multiple vias. In addition the net-short element should be close to the driver IC. Copyright © 2012, Texas Instruments Incorporated IC Grounding and Layout Recommendations 59 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 6 Tools and Documentation The application firmware for UCD3138 is developed on Texas Instruments Code Composer Studio (CCS) integrated development environment (v3.3 recommended). Monitoring and Configuration of key device parameters and real time debug capabilities are offered through Texas Instruments’ FUSION_DIGITAL_POWER_DESIGNER Graphical User Interface (GUI), http://www.ti.com/tool/fusion_digital_power_designer. The FUSION_DIGITAL_POWER_DESIGNER software application uses PMBus protocol to communicate with the device over serial bus by way of a interface adaptor known as USB-TO-GPIO, available as an EVM from Texas Instruments (http://www.ti.com/tool/usb-to-gpio). The software application can also be used to program the devices, with a version of the tool known as FUSION_MFR_GUI optimized for manufacturing environments (http://www.ti.com/tool/fusion_mfr_gui). The FUSION_MFR_GUI tool supports multiple devices on a board, and includes built-in logging and reporting capabilities. In terms of reference documentation, the following 3 programmer’s manuals are available offering detailed information regarding the application and usage of UCD3138 digital controller: 1. UCD3138 Digital Power Peripheral Programmer's Manual Key topics covered in this manual include: – Digital Pulse Width Modulator (DPWM) – Modes of Operation (Normal/Multi/Phase-shift/Resonant etc) – Automatic Mode Switching – DPWMC, Edge Generation & Intra-Mux – Front End – Analog Front End – Error ADC or EADC – Front End DAC – Ramp Module – Successive Approximation Register Module – Filter – Filter Math – Loop Mux – Analog Peak Current Mode – Constant Current/Constant Power (CCCP) – Automatic Cycle Adjustment – Fault Mux – Analog Comparators – Digital Comparators – Fault Pin functions – DPWM Fault Action – Ideal Diode Emulation (IDE), DCM Detection – Oscillator Failure Detection – Register Map for all of the above peripherals in UCD3138 2. UCD3138 Monitoring and Communications Programmer’s Manual Key topics covered in this manual include: – ADC12 – Control, Conversion, Sequencing & Averaging – Digital Comparators – Temperature Sensor – PMBUS Addressing – Dual Sample & Hold – Miscellaneous Analog Controls (Current Sharing, Brown-Out, Clock-Gating) – PMBUS Interface – General Purpose Input Output (GPIO) 60 Tools and Documentation Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 – Timer Modules – PMBus – Register Map for all of the above peripherals in UCD3138 3. UCD3138 ARM and Digital System Programmer’s Manual Key topics covered in this manual include: – Boot ROM & Boot Flash – BootROM Function – Memory Read/Write Functions – Checksum Functions – Flash Functions – Avoiding Program Flash Lock-Up – ARM7 Architecture – Modes of Operation – Hardware/Software Interrupts – Instruction Set – Dual State Inter-working (Thumb 16-bit Mode/ARM 32-bit Mode) – Memory & System Module – Address Decoder, DEC (Memory Mapping) – Memory Controller (MMC) – Central Interrupt Module – Register Map for all of the above peripherals in UCD3138 In addition to the tools and documentation described above, for the most up to date information regarding evaluation modules, reference application firmware and application notes/design tips, please visit http://www.ti.com/product/ucd3138. Copyright © 2012, Texas Instruments Incorporated Tools and Documentation 61 Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 SLUSAP2B –MARCH 2012–REVISED JULY 2012 www.ti.com 7 References 1. UCD3138 Digital Power Peripherals Programmer’s Manual (Literature Number:SLUU995) 2. UCD3138 Monitoring & Communications Programmer’s Manual (Literature Number:SLUU996) 3. UCD3138 ARM and Digital System Programmer’s Manual (Literature Number:SLUU994) 4. Code Composer Studio Development Tools v3.3 – Getting Started Guide, (Literature Number: SPRU509H) 5. ARM7TDMI-S Technical Reference Manual 6. System Management Bus (SMBus) Specification 7. PMBusTM Power System Management Prototcol Specification (1) (1) PMBus is a trademark of SMIF, Inc. 62 References Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): UCD3138 UCD3138 www.ti.com SLUSAP2B –MARCH 2012–REVISED JULY 2012 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (March 2012) to Revision A Page • Added Production Data statement to footnote and removed "Product Preview" banner ........................... 6 Changes from Revision A (March 2012) to Revision B Page • Added Feature bullets ............................................................................................................. 6 • Changed "Dual Edge Modulation" to "Triangular Modulation" in Features section ................................. 6 • Changed "265 ksps" to "267 ksps" in Features section ................................................................... 6 • Clarified number of UARTs in Feature section ............................................................................... 6 • Changed "FDPP" to "DDP" throughout. ....................................................................................... 7 • Changed Total GPIO pin count for the UCD3138 40-pin device from "17" to "18" in the Product Selection Matrix table. .......................................................................................................................... 8 • Changed "VREG" to "BP18" in conditions statement for Electrical Characteristics table. ....................... 16 • Changed EAP – EAN Error voltage digital resolution MIN values for AFE=3, AFE=2, AFE=1, AFE=0 from 0.95, 1.90, 3.72, and 7.3 respectively; to, 0.8, 1.7, 3.55, and 6.90 respectively. ....................................... 16 • Changed "VREG" to "BP18" in conditions statement for Electrical Characteristics table. ....................... 17 • Changed conditions for VOL and VOH specs in the Electrical Characteristics table ................................. 17 • Added TWD spec to Electrical Characteristics table ...................................................................... 17 • Changed "VREG" to "BP18" in conditions statement for Electrical Characteristics table. ....................... 18 • Changed "PWM" to "DPWM" in DPWM Module. ............................................................................ 29 • Changed "PWMA" and "PWMB" to "DPWMA" and "DPWMB" in . ...................................................... 34 • Changed waveforms graphic for "Phase Shifted Full Bridge Example" for clarification .......................... 41 • Added text to section LLC Example .......................................................................................... 42 • Changed typical conversion speed from "268 ksps" to "267 ksps" in the General Purpose ADC12 section. .............................................................................................................................. 52 • Added package ID information for the UCD3138RGC and UCD3138RHA devices. ................................. 54 • Added bullet "AD02 has a special ESD protection mechanism that prevents the pin from pulling down the current-share bus if power is missing from the UCD3138" to Current Sharing Control. ..................... 57 • Added sub-bullet "The power pad of the driver IC should be tied to DGND" and changed capacitor value from "0.1 μF" to "4.7 μF" in IC Grounding and Layout Recommendations ........................................... 59 • Added "Tools and Documentation" section ................................................................................. 60 • Changed " Mechanical Data" section to "References" section ......................................................... 62 Copyright © 2012, Texas Instruments Incorporated References 63 Submit Documentation Feedback Product Folder Link(s): UCD3138 PACKAGE OPTION ADDENDUM www.ti.com 26-Jul-2012 Addendum-Page 1 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) Samples (Requires Login) UCD3138RGCR ACTIVE VQFN RGC 64 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR UCD3138RGCT ACTIVE VQFN RGC 64 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR UCD3138RHAR ACTIVE VQFN RHA 40 2500 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR UCD3138RHAT ACTIVE VQFN RHA 40 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. 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TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Reel Diameter (mm) Reel Width W1 (mm) A0 (mm) B0 (mm) K0 (mm) P1 (mm) W (mm) Pin1 Quadrant UCD3138RGCR VQFN RGC 64 2000 330.0 16.4 9.3 9.3 1.5 12.0 16.0 Q2 UCD3138RGCT VQFN RGC 64 250 180.0 16.4 9.3 9.3 1.5 12.0 16.0 Q2 UCD3138RHAR VQFN RHA 40 2500 330.0 16.4 6.3 6.3 1.5 12.0 16.0 Q2 UCD3138RHAT VQFN RHA 40 250 180.0 16.4 6.3 6.3 1.5 12.0 16.0 Q2 PACKAGE MATERIALS INFORMATION www.ti.com 26-Jul-2012 Pack Materials-Page 1 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) UCD3138RGCR VQFN RGC 64 2000 367.0 367.0 38.0 UCD3138RGCT VQFN RGC 64 250 210.0 185.0 35.0 UCD3138RHAR VQFN RHA 40 2500 367.0 367.0 38.0 UCD3138RHAT VQFN RHA 40 250 210.0 185.0 35.0 PACKAGE MATERIALS INFORMATION www.ti.com 26-Jul-2012 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. 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Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Mobile Processors www.ti.com/omap TI E2E Community e2e.ti.com Wireless Connectivity www.ti.com/wirelessconnectivity Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 1 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 Power Electronics R&D Center Wireless Connectivity Panasonic Industrial Devices Europe GmbH APPROVED CHECKED DESIGNED Specification for Production Panasonic Industrial Devices Europe GmbH Zeppelinstrasse 19 21337 Lüneburg Applicant / Manufacturer Hardware Germany Not applikable Applicant / Manufacturer Software Software Version Not applikable Contents Approval for Mass Production Customer Bluetooth QDL ID Qualified Design Listing (QDL) ID: B019784 As Controller Sub-System Listing for PAN13xx Series. By purchase of any products described in this document the customer accepts the document's validity and declares their agreement and understanding of its contents and recommendations. Panasonic reserves the right to make changes as required without notification. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 2 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de TABLE OF CONTENTS 1 Scope of this Document..................................................................................................5 1.1 New PAN1315A, PAN1325A.................................................................................5 2 Key Features...................................................................................................................6 2.1 Software Block Diagram........................................................................................6 3 Applications for the Module.............................................................................................7 4 Description for the Module..............................................................................................7 5 Detailed Description........................................................................................................8 5.1 Terminal Layout.....................................................................................................8 5.1.1 5.1.1. Terminal Layout PAN131x without antenna...................................8 5.1.2 5.1.2. Terminal Layout PAN132x with antenna........................................9 5.2 Pin Description.....................................................................................................10 5.3 Device Power Supply...........................................................................................11 5.4 Clock Inputs.........................................................................................................12 6 Bluetooth Features........................................................................................................12 7 Block Diagram...............................................................................................................13 8 Test Conditions.............................................................................................................14 9 General Device Requirements and Operation..............................................................14 9.1 Absolute Maximum Ratings.................................................................................14 9.2 Recommended Operating Conditions..................................................................15 9.3 Current Consumption...........................................................................................15 9.4 General Electrical Characteristics........................................................................16 9.5 nSHUTD Requirements.......................................................................................16 9.6 External Digital Slow Clock Requirements (–20°C to +70°C)..............................16 10 Host Controller Interface...............................................................................................17 11 Audio/Voice Codec Interface.........................................................................................18 11.1 PCM Hardware Interface.....................................................................................18 11.2 Data Format.........................................................................................................18 11.3 Frame Idle Period................................................................................................19 11.4 Clock-Edge Operation.........................................................................................20 11.5 Two-Channel PCM Bus Example........................................................................20 11.6 Audio Encoding....................................................................................................20 11.7 Improved Algorithm For Lost Packets..................................................................21 11.8 Bluetooth/PCM Clock Mismatch Handling...........................................................21 11.9 Bluetooth Inter-IC Sound (I2S)............................................................................21 11.10Current Consumption for Different Bluetooth Scenarios......................................22 12 Bluetooth RF Performance............................................................................................22 13 Soldering Temperature-Time Profile (for reflow soldering)...........................................25 13.1 For lead solder.....................................................................................................25 13.2 For leadfree solder...............................................................................................26 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 3 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 14 Module Dimension........................................................................................................27 14.1 Module Dimensions PAN131X without Antenna..................................................27 14.2 Module Dimensions PAN132X with Antenna.......................................................28 15 Footprint of the Module.................................................................................................29 15.1 Footprint PAN131x without antenna....................................................................29 15.2 Footprint PAN132x with antenna.........................................................................30 16 Labeling Drawing..........................................................................................................31 17 Mechanical Requirements.............................................................................................31 18 Recommended Foot Pattern.........................................................................................32 18.1 recommended foot pattern PAN131x without antenna........................................32 18.2 recommended foot pattern PAN132x with antenna.............................................33 19 Layout Recommendations with Antenna (PAN132x)....................................................34 20 Bluetooth LE (LOW ENERGY) PAN1316/26................................................................34 20.1 Network Topology................................................................................................34 20.2 module features...................................................................................................35 20.3 Current consumption for different LE scenarios..................................................36 21 ANT PAN1317/27..........................................................................................................36 21.1 Network topology.................................................................................................36 21.2 module features..................................................................................................37 21.3 ANT Current consumption...................................................................................37 22 Triple mode (BR/EDR + Bluetooth low energy + ANT) PAN1323................................38 22.1 Triple Mode Current consumption.......................................................................38 23 Development of Applications.........................................................................................39 23.1 Tools to be needed..............................................................................................39 24 List of Profiles...............................................................................................................40 25 Reliability Tests.............................................................................................................40 26 Cautions........................................................................................................................41 26.1 Design Notes.......................................................................................................41 26.2 Installation Notes.................................................................................................41 26.3 Usage Conditions Notes......................................................................................42 26.4 Storage Notes......................................................................................................42 26.5 Safety Cautions...................................................................................................43 26.6 Other cautions.....................................................................................................43 27 Packaging.....................................................................................................................44 27.1 Packaging of PAN131x without antenna.............................................................44 27.2 Packaging for PAN132x with antenna.................................................................47 28 Ordering Information.....................................................................................................48 29 RoHS Declaration.........................................................................................................49 30 Data Sheet Status.........................................................................................................49 31 History for this Document..............................................................................................50 32 Related Documents.......................................................................................................50 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 4 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 33 General Information......................................................................................................52 34 Regulatory Information..................................................................................................52 34.1 FCC for US..........................................................................................................52 34.1.1 FCC Notice.............................................................................................52 34.1.2 Caution...................................................................................................53 34.1.3 Labeling Requirements..........................................................................53 34.1.4 Antenna Warning....................................................................................53 34.1.5 Approved Antenna List...........................................................................53 34.1.6 RF Exposure PAN13xx..........................................................................54 34.2 Industry Canada Certification..............................................................................54 34.3 European R&TTE Declaration of Conformity.......................................................54 34.4 NCC for Taiwan...................................................................................................56 34.4.1 Labeling Requirements..........................................................................56 34.4.2 NCC Statement......................................................................................56 34.5 Bluetooth SIG Statement.....................................................................................56 35 Life Support Policy........................................................................................................56 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 5 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 1 SCOPE OF THIS DOCUMENT This product specification describes Panasonic’s HCI, Class 1.5 , TI based, Bluetooth®1 modules, series number 13xx. For detailed family overview that includes part numbers see Chapter 28, Ordering Information. Non-antenna versions will be refered to as PAN131x, versions with antenna will be refered to as PAN132x in this document. Fore information and features on Bluetooth Low Energy 4.0 refer to Chapter 19, for information on ANT refer to Chapter 21. 1.1 NEW PAN1315A, PAN1325A The PAN1315A/1325A Series is based on Texas Instruments’ NEW CC2560A controller. A ROM update from Texas Instruments to the CC2560 IC has allowed Panasonic to improve PAN1315/1325 Series. The NEW PAN1315A/1325A Series Modules has increased power and system efficiency resulting from reduced initialization script size, start-up time and decreased system memory requirements. Compatibility: PAN1315, PAN1315A, PAN1316 and PAN1317 are 100% footprint compatible PAN1325, PAN1325A, PAN1326 and PAN1327 are 100% footprint compatible As an updated initialization script resident on the application microcontroller is required for modules based on the CC2560A, compatibility between the PAN1315/PAN1325 and PAN1315A/PAN1325A is dependant on the Bluetooth stack. Stacks are available that will operate with all PAN1315/1325 variations. BT-Stack solutions provided by software development partners are available for most processors, including linux based host systems.. For detailed family overview that includes part numbers see Chapter 28 Ordering Information. Contact your stack provider or local Panasonic sales company for currently available Bluetooth Profiles. 1 Bluetooth is a registered trademark of the Bluetooth Special Interest Group. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 6 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 2 KEY FEATURES • Bluetooth specification v2.1 + EDR (Enhanced Data Rate) • Surface mount type 6.5(9.5 w. Ant.) x 9.0 x 1.8 mm³ • Up to 10.5dBm Tx power (typical) with transmit power control • High sensitivity (-93 dBm typ.) • Texas Instrument’s CC256X BlueLink 7.0 inside • Fast Connection Setup • Extended SCO Link • Supports convenient direct connection to battery (2.2-4.8 V), or connect to DC/DC (1.7-1.98 V) for improved power efficiency • Internal crystal oscillator (26MHz) • Fully shielded for immunity • Full Bluetooth data rate up to 2,178kbps asymmetric • Support for Bluetooth power saving modes (Sniff, Hold) • Support for very low-power modes (deep sleep and power down) • Optional support for ultra-low-power mode. Standby with Battery-Backup • PCM Interface Master / Slave supporting 13 or 16 bit linear, 8 bit μ-law or A-law Codecs and CVSD transcoders on up to 3 SCO channels • Full 8- to 128-bit encryption • UART, I²C and PCM Interface • IO operating voltage = 1.8 V nominal • 3 Channel ADC and 1 Channel DAC • Bluetooth profiles such as SPP, A2DP and others are available. Refer to Panasonic’s RF module website for a listing of the most current releases. • Manufactured in conformance with RoHS 2.1 SOFTWARE BLOCK DIAGRAM PAN13xxHost ProcessorApplicationBD/EDRBLEANTHCIL2CAPHCIRF BlockPAN13xxHost Block CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 7 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 3 APPLICATIONS FOR THE MODULE All Embedded Wireless Applications • Smart Phones • Cable Replacement • Industrial Control • Automotive • Medical • Access Points • Scanners • Consumer Electronics • Wireless Sensors • Monitoring and Control • Low Power • Access Points 4 DESCRIPTION FOR THE MODULE The PAN1315 and PAN1315A are short-range, Class 1 or 2, HCI modules for implementing Bluetooth functionality into various electronic devices. A block diagram can be found in Chapter 7. Communication between the module and the host controller is carried out via UART. New designs can be completed quickly by mating the PAN13xx series modules with Texas Instruments’ MSP430BT5190 that contains Mindtree’s EtherMind Bluetooth Protocol Stack and serial port profile, additional computing power can be achieved by choosing TI’s Stellaris ARM7 controller that includes StoneStreet One's A2DP profile. Other BT profiles are available on custom development basis. Additional controllers are also supported by the PAN13xx series by using a TI/Panasonic software development partner to port the Bluetooth stack and profiles. Mindtree's Software Development Kit (SDK) is available on TI's website -- www.ti.com/connectivity.com Contact your local sales office for further details on additional options and services, by visiting www.panasonic.com/rfmodules or write an e-mail to wireless@eu.panasonic.com. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 8 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 5 DETAILED DESCRIPTION 5.1 TERMINAL LAYOUT 5.1.1 5.1.1. Terminal Layout PAN131x without antenna No Pin Name Pull at Reset Def. Dir. 2 I/O Type 3 Description of Options (Common) 1 GND Connect to Ground 2 TX_DBG PU O 2 mA Logger output 3 HCI_CTS PU I 8 mA HCI UART clear-to-send. 4 HCI_RTS PU O 8 mA HCI UART request-to-send. 5 HCI_RX PU I 8 mA HCI UART data receive 6 HCI_TX PU O 8 mA HCI UART data transmit 7 AUD_FSYNC PD IO 4 mA PCM frame synch. (NC if not used) Fail safe4 8 SLOW_CLK_IN I 32.768-kHz clock in Fail safe 9 NC IO Not connected 10 MLDO_OUT O Main LDO output (1.8 V nom.) 11 CL1.5_LDO_IN I PA LDO input 12 GND Connect to Ground 13 RF IO Bluetooth RF IO 14 GND Connect to Ground 15 MLDO_IN I Main LDO input 16 nSHUTD PD I Shutdown input (active low). 17 AUD_OUT PD O 4 mA PCM data output. (NC if not used) Fail safe 18 AUD_IN PD I 4 mA PCM data input. (NC if not used) Fail safe 19 AUD_CLK PD IO HY, 4 mA PCM clock. (NC if not used) Fail safe 20 GND Connect to Ground 21 NC EEPROM I²C SDA (Internal) 22 VDD_IO PI I/O power supply 1.8 V Nom 23 NC EEPROM I²C SCL (Internal) 24 NC IO Not connected 2 I = input; O = output; IO = bidirectional; P = power; PU = pulled up; PD = pulled down 3 I/O Type: Digital I/O cells. HY = input hysteresis, current = typ. output current 4 No signals are allowed on the IO pins if no VDD_IO (Pin 22) power supplied, except pin 7, 8, 17-19. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 9 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 5.1.2 5.1.2. Terminal Layout PAN132x with antenna No Pin Name Pull at Reset Def. Dir. 5 I/O Type 6 Description of Options (Common) A GND Connect to Ground B GND Connect to Ground C GND Connect to Ground D GND Connect to Ground No 1-24 see above in Chapter 5.1.1. Except PIN 13 is not connected. For RF conducted measurements, either use the PAN1323ETU or de-solder the antenna and solder an antenna connector to the hot pin. 5 I = input; O = output; IO = bidirectional; P = power; PU = pulled up; PD = pulled down 6 I/O Type: Digital I/O cells. HY = input hysteresis, current = typ. output current CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 10 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 5.2 PIN DESCRIPTION Pin Name No ESD 7 (V) Pull at Reset Def. Dir. 8 I/O Type 9 Description of Options Bluetooth IO SIGNALS HCI_RX 5 750 PU I 8 mA HCI UART data receive HCI_TX 6 750 PU O 8 mA HCI UART data transmit HCI_RTS 4 750 PU O 8 mA HCI UART request-to-send. HCI_CTS 3 750 PU I 8 mA HCI UART clear-to-send. AUD_FYSNC 7 500 PD IO 4 mA PCM frame synch (NC if not used) Fail safe AUD_CLK 19 500 PD IO HY, 4 mS PCM clock (NC if not used) Fail safe AUD_IN 18 500 PD I 4 mA PCM data input (NC if not used) Fail safe AUD_OUT 17 500 PD O 4 mA PCM data output (NC if not used) Fail safe Logger output TX_DBG 2 1000 PU O 2 mA OPTION: nTX_DBG – logger out (low = 1) CLOCK SIGNALS SLOW_CLK_IN 8 1000 I 32.768-kHz clock in Fail safe Bluetooth ANALOG SIGNALS RF 13 1000 IO Bluetooth RF IO (not connected with antenna) nSHUTD 16 1000 PD I Shutdown input (active low). Bluetooth POWER AND GND SIGNALS VDD_IO 22 1000 PI I/O power supply 1.8 V Nom MLDO_IN 15 1000 I Main LDO inputConnect directly to battery or to a pre-regulated 1.8-V supply MLDO_OUT 10 1000 O Main LDO output (1.8 V nom.) Can not be used as 1.8V supply due to internal connection to the RF part. CL1.5_LDO_IN 11 1000 I PA LDO input Connect directly to battery or to a pre-regulated 1.8-V supply GND 1 P Connect to Ground GND 12 P Connect to Ground GND 14 P Connect to Ground GND 20 P Connect to Ground EEPROM IO SIGNALS (EEPROM is optional in PAN13x product line) NC 23 1000 PU/PD I HY, 4mA EEPROM I²C SCL (Internal) NC 21 1000 PU/PD IO HY, 4mA EEPROM I²C IRQ (Internal) Remark: HCI_CTS is an input signal to the CC256X device: - When HCI_CTS is low, then CC256X is allowed to send data to Host device. - When HCI_CTS is high, then CC256X is not allowed to send data to Host device. 7 ESD: Human Body Model (HBM). JEDEC 22-A114 8 I = input; O = output; IO = bidirectional; P = power; PU = pulled up; PD = pulled down 9 I/O Type: Digital I/O cells. HY = input hysteresis, current = typ output current CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 11 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 5.3 DEVICE POWER SUPPLY The PAN13XX Bluetooth radio solution is intended to work in devices with a limited power budget such as cellular phones, headsets, hand-held PC’s and other battery-operated devices. One of the main differentiators of the PAN13XX is its power management – its ability to draw as little current as possible. The PAN13XX device requires two kinds of power sources: • Main power supply for the Bluetooth - VDD_IN = VBAT • Power source for the 1.8 V I/O ring - VDD_IO The PAN13XX includes several on-chip voltage regulators for increased noise immunity. The PAN13XX can be connected either directly to the battery or to an external 1.8-V DC to DC converter. There are three ways to supply power: • Full-VBAT system: Maximum RF output power, but not optimum system power: • Full-DC2DC system: Lower RF output power, but optimum system power: CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 12 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de • Mixed DC2DC-VBAT system: Maximum RF output power and optimum system power, but requires routing of VBAT: 5.4 CLOCK INPUTS The slow clock is always supplied from an external source. It is connected to the SLOW_CLK_IN pin number 8 and can be a digital signal with peak to peak of 0-1.8 V. The slow clock's frequency accuracy must be 32.768 kHz ±250 ppm for Bluetooth usage (according to the Bluetooth specification). The Slow Clock 32.768 kHz is mandatory to start the internal controller, otherwise the module does not start up. 6 BLUETOOTH FEATURES • Support of Bluetooth2.1+EDR (Lisbon Release) up to HCI level. • Very fast AFH algorithm for both ACL and eSCO. • Supports typically 4 dBm Class 2 TX power w/o external PA, improving Bluetooth link robustness. Adjusting the host settings, the TX power can be increased to 10 dBm. However it is important, that the national regulations and Bluetooth specification are met. • Digital Radio Processor (DRP) single-ended 50 ohm. • Internal temperature detection and compensation ensures minimal variation in the RF performance over temperature. • Flexible PCM and I2S digital audio/voice interfaces: Full flexibility of data-format (Linear, a-Law, μ-Law), data-width, data order, sampling and slot positioning, master/slave modes, high clock rates up to 15 MHz for slave mode (or 4.096 MHz for Master Mode). Lost packet concealment for improved audio. • Proprietary low-power scan method for page and inquiry scans, achieves page and inquiry scans at 1/3rd normal power. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 13 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 7 BLOCK DIAGRAM Note: The Slow Clock 32.768 kHz is mandatory, otherwise the module does not start up, refer to Chapter 5.4 for additional information. Note: The IO are 1.8V driven and might need external level shifter and LDO. The MLDO_OUT PIN can not be used as reference due to RF internal connection. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 14 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 8 TEST CONDITIONS Measurements shall be made under room temperature and humidity unless otherwise specified. 9 GENERAL DEVICE REQUIREMENTS AND OPERATION Temperature 25 ± 10°C Humidity 40 to 85%RH SW-Patch V2.30 Supply Voltage 3.3V All specifications are over temperature and process, unless indicated otherwise. 9.1 ABSOLUTE MAXIMUM RATINGS Over operating free-air temperature range (unless otherwise noted). Note All parameters are measured as follows unless stated otherwise: VDD_IN 10 = 3.3 V, VDD_IO = 1.8 V. No See 11 Value Unit Ratings Over Operating Free-Air Temperature Range 1 VDD_IN Supply voltage range –0.5 to 5.5 V 12 2 VDDIO_1.8V –0.5 to 2.145 V 3 Input voltage to RF (Pin 13) –0.5 to 2.1 V 4 Operating ambient temperature range –20 to 70 °C 5 Storage temperature range –40 to 125 °C 6 Bluetooth RF inputs (Pin 13) 10 dBm 7 ESD: Human Body Model (HBM). JEDEC 22-A114 500 V 10 VDD_IN is supplied to MLDO_IN (Pin 15) and CL1.5_LDO_IN (Pin 11), other options are described in Chapter 5.3. 11 Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 12 Maximum allowed depends on accumulated time at that voltage: VDD_IN is defined in Reference schematics. When DC2DC supply is used, maximum voltage into MLDO_OUT and LDO_IN = 2.145 V. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 15 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 9.2 RECOMMENDED OPERATING CONDITIONS No Rating Condition Symbol Min Max Unit 1 Power supply voltage 13 VDD_IN 1.7 4.8 V 2 IO power supply voltage VDD_IO 1.62 1.92 V 3 High-level input voltage Default VIH 0.65 x VDD_IO VDD_IO V 4 Low-level input voltage Default VIL 0 0.35 x VDD_IO V 5 IO Input rise/fall times, 10% to 90% 14 Tr/Tf 1 10 ns 0 to 0.1 MHz 60 0.1 to 0.5 MHz 50 0.5 to 2.5 MHz 30 2.5 to 3.0 MHz 15 6 Maximum ripple on VDD_IN (Sine wave) for 1.8 V (DC2DC) mode > 3.0 MHz 5 mVp-p 7 Voltage dips on VDD_IN (VBAT) (duration = 577 μs to2.31 ms, period = 4.6 ms) 400 mV 8 Maximum ambient operating temperature 15 70 °C 9 Minimum ambient operating temperature 16 -20 C 9.3 CURRENT CONSUMPTION No Characteristics Min 25°C Typ 25°C Max 25°C Min -20°C Typ -20°C Max -20°C Min +70°C Typ +70°C Max +70°C Unit 1 Current consumption in shutdown mode 17 1 3 7 μA 2 Current consumption in deep sleep mode 18 40 105 700 μA 3 Total IO current consumption for active mode 1 1 1 mA 4 Current consumption during transmit DH5 full throughput 40 mA 13 Excluding 1.98 < VDD_IN < 2.2 V range – not allowed. 14 Asynchronous mode. 15 The device can be reliably operated for 7 years at Tambient of 70°C, assuming 25% active mode and 75% sleep mode (15,400 cumulative active power-on hours). 16 The device can be reliably operated for 7 years at Tambient of 70°C, assuming 25% active mode and 75% sleep mode (15,400 cumulative active power-on hours). 17 Vbat + Vio 18 Vbat + Vio + Vsd (shutdown) CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 16 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 9.4 GENERAL ELECTRICAL CHARACTERISTICS No Rating Condition Min Max Value at 2/4/8 mA 0.8 x VDD_IO VDD_IO V 1 High-level output voltage, VOH at 0.1 mA VDD_IO – 0.2 VDD_IO V at 2/4/8 mA 0 0.2 x VDD_IO V 2 Low-level output voltage, VOL at 0.1 mA 0 0.2 V Resistance 1 MΩ 3 IO input impedance Capacitance 5 pF 4 Output rise/fall times,10% to 90% (Digital pins) CL = 20 pF 10 Ns PU typ = 6.5 3.5 9.7 TX_DBG, us PCM b PD typ = 27 9.5 55 μA PU typ = 100 100 300 5 IO pull currents All others PD typ = 100 100 360 μA 9.5 NSHUTD REQUIREMENTS No Parameter Symbol Min Max Unit 1 Operation mode level 19 V IH 1.42 1.98 V 2 Shutdown mode level VIL 0 0.4 V 3 Minimum time for nSHUT_DOWN low to reset the device 5 ms 4 Rise/fall times Tr/Tf 20 μs 9.6 EXTERNAL DIGITAL SLOW CLOCK REQUIREMENTS (–20°C TO +70°C) No Characteristics Condition Symbol Min Typ Max Unit 1 Input slow clock frequency 32768 Hz 2 Input slow clock accuracy (Initial + temp + aging) Bluetooth ±250 Ppm 3 Input transition time Tr/Tf – 10% to 90% Tr/Tf 100 Ns 4 Frequency input duty cycle 15% 50% 85% 5 Phase noise at 1 kHz -125 dBc/Hz 6 Jitter Integrated over 300 to 15000 Hz 1 Hz VIH 0.65 x VDD_IO VDD_IO 7 Slow clock input voltage limits Square wave, DC coupled VIL 0 0.35 x VDD_IO V peak 8 Input impedance 1 MΩ 9 Input capacitance 5 pF 19 Internal pull down retains shut down mode when no external signal is applied to this pin. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 17 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 10 HOST CONTROLLER INTERFACE The CC256X incorporates one UART module dedicated to the host controller interface (HCI) transport layer. The HCI interface transports commands, events, ACL, and synchronous data between the Bluetooth device and its host using HCI data packets. The UART module supports H4 (4-wires) protocol with maximum baud rate of 4 Mbps for all fast clock frequencies. After power up the baud rate is set for 115.2 kbps, irrespective of fast clock frequency. The baud rate can thereafter be changed with a vendor specific command. The CC256X responds with a Command Complete Event (still at 115.2 kbps), after which the baud rate change takes place. HCI hardware includes the following features: • Receiver detection of break, idle, framing, FIFO overflow, and parity error conditions • Transmitter underflow detection • CTS/RTS hardware flow control The interface includes four signals: TXD, RXD, CTS, and RTS. Flow control between the host and the CC256X is byte-wise by hardware. Flow control is obtained by the following: When the UART RX buffer of the CC256X passes the “flow control” threshold, it will set the UART_RTS signal high to stop transmission from the host. When the UART_CTS signal is set high, the CC256X will stop its transmission on the interface. In case HCI_CTS is set high in the middle of transmitting a byte, the CC256X will finish transmitting the byte and stop the transmission. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 18 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 11 AUDIO/VOICE CODEC INTERFACE The codec interface is a fully-dedicated programmable serial port that provides the logic to interface to several kinds of PCM or I2S codec’s. PAN13XX supports all voice coding schemes required by Bluetooth specification – Log PCM (A-Law or μ-Law) and Linear (CVSD). In addition, module also supports transparent scheme: • Two voice channels • Master / slave modes • μ-Law, A-Law, Linear, Transparent coding schemes • Long and short frames • Different data sizes, order, and positions. • High rate PCM interface for EDR • Enlarged interface options to support a wider variety of codecs • PCM bus sharing 11.1 PCM HARDWARE INTERFACE The PCM interface is one implementation of the codec interface. It contains the following four lines: • Clock—configurable direction (input or output) • Frame Sync—configurable direction (input or output) • Data In—Input • Data Out—Output/3-state The Bluetooth device can be either the master of the interface where it generates the clock and the frame-sync signals, or slave where it receives these two signals. The PCM interface is fully configured by a vendor specific command. For slave mode, clock input frequencies of up to 16 MHz are supported. At clock rates above 12 MHz, the maximum data burst size is 32 bits. For master mode, the CC256X can generate any clock frequency between 64 kHz and 6 MHz. Please contact your sales representative if using the I2S bus over PCM. We strongly recommend adding a low pass filter (series resistor and capacitor to GND) to the bus for better noise suppression. It is not recommended to directly contact the host μController/DSP with the PCM interface. 11.2 DATA FORMAT The data format is fully configurable: • The data length can be from 8 to 320 bits, in 1-bit increments, when working with two channels, or up to 640 bits when using 1 channel. The Data length can be set independently for each channel. • The data position within a frame is also configurable in with 1 clock (bit) resolution and can be set independently (relative to the edge of the Frame Sync signal) for each channel. • The Data_In and Data_Out bit order can be configured independently. For example; Data_In can start with the MSB while Data_Out starts with LSB. Each channel is separately configurable. The inverse bit order (that is, LSB first) is supported only for sample sizes up to 24 bits. • It is not necessary for the data in and data out size to be the same length. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 19 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de • The Data_Out line is configured to ‘high-Z’ output between data words. Data_Out can also be set for permanent high-Z, irrespective of data out. This allows the CC256X to be a bus slave in a multi-slave PCM environment. At powerup, Data Out is configured as high-Z. 11.3 FRAME IDLE PERIOD The codec interface has the capability for frame idle periods, where the PCM clock can “take a break” and become ‘0’ at the end of the PCM frame, after all data has been transferred. The CC256X supports frame idle periods both as master and slave of the PCM bus. When CC256X is the master of the interface, the frame idle period is configurable. There are two configurable parameters: • Clk_Idle_Start – Indicates the number of PCM clock cycles from the beginning of the frame until the beginning of the idle period. After Clk_Idle_Start clock cycles, the clock will become ‘0’. • Clk_Idle_End – Indicates the time from the beginning of the frame till the end of the idle period. This time is given in multiples of PCM clock periods. The delta between Clk_Idle_Start and Clk_Idle_End is the clock idle period. For example, for PCM clock rate = 1 MHz, frame sync period = 10 kHz, Clk_Idle_Start = 60, Clk_Idle_End = 90. Between each two frame syncs there are 70 clock cycles (instead of 100). The clock idle period starts 60 clock cycles after the beginning of the frame, and lasts 90 – 60 = 30 clock cycles. This means that the idle period ends 100 – 90 = 10 clock cycles before the end of the frame. The data transmission must end prior to the beginning of the idle period. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 20 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 11.4 CLOCK-EDGE OPERATION The codec interface of the CC256X can work on the rising or the falling edge of the clock. It also has the ability to sample the frame sync and the data at inversed polarity. This is the operation of a falling-edge-clock type of codec. The codec is the master of the PCM bus. The frame sync signal is updated (by the codec) on the falling clock edge and therefore shall be sampled (by the CC256X) on the next rising clock. The data from the codec is sampled (by the CC256X) on the clock falling edge. 11.5 TWO-CHANNEL PCM BUS EXAMPLE In below figure, a 2-channel PCM bus is shown where the two channels have different word sizes and arbitrary positions in the bus frame. (FT stands for Frame Timer) 11.6 AUDIO ENCODING The CC256X codec interface can use one of four audio-coding patterns: • A-Law (8-bit) • μ-Law (8-bit) • Linear (8- or 16-bit) CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 21 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 11.7 IMPROVED ALGORITHM FOR LOST PACKETS The CC256X features an improved algorithm for improving voice quality when received voice data packets are lost. There are two options: • Repeat the last sample – possible only for sample sizes up to 24 bits. For sample sizes >24 bits, the last byte is repeated. • Repeat a configurable sample of 8 to 24 bits (depends on the real sample size), in order to simulate silence (or anything else) in the PCM bus. The configured sample will be written in a specific register for each channel. The choice between those two options is configurable separately for each channel. 11.8 BLUETOOTH/PCM CLOCK MISMATCH HANDLING In Bluetooth RX, the CC256X receives RF voice packets and writes these to the codec I/F. If the CC256X receives data faster than the codec I/F output allows, an overflow will occur. In this case, the Bluetooth has two possible behaviour modes: ‘allow overflow’ and ‘don’t allow overflow’. • If overflow is allowed, the Bluetooth will continue receiving data and will overwrite any data not yet sent to the codec. • If overflow is not allowed, RF voice packets received when buffer is full will be discarded. 11.9 BLUETOOTH INTER-IC SOUND (I2S) The CC256X can be configured as an Inter-IC Sound (I2S) serial interface to an I2S codec device. In this mode, the CC256X audio codec interface is configured as a bi-directional, full-duplex interface, with two time slots per frame: Time slot 0 is used for the left channel audio data and time slot 1 for the right channel audio data. Each time slot is configurable up to 40 serial clock cycles in length and the frame is configurable up to 80 serial clock cycles in length. Do not connect the the microcontroller/DSP directly to the module's PCM interface, a simple RC low pass filter is recommended to improve noise suppression. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 22 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 11.10 CURRENT CONSUMPTION FOR DIFFERENT BLUETOOTH SCENARIOS The following table gives average current consumption for different Bluetooth scenarios. Conditions: VDD_IN = 3.6 V, 25°C, 26-MHz fast clock, nominal unit, 4 dBm output power. 12 BLUETOOTH RF PERFORMANCE No Characteristics Typ BT Spec Max BT Spec Min Class1 Class1 1 Average Power Hopping DH5 [dBm] 21, 22 7.2 20 4 2 Average Power: Ch0 [dBm] 21, 22 7.5 20 4 3 Peak Power: Ch0 [dBm] 21, 22 7.7 23 4 Average Power: Ch39 [dBm] 21, 22 7.0 20 4 5 Peak Power: Ch39 [dBm] 21, 22 7.2 23 6 Average Power: Ch78 [dBm] 21, 22 6.7 20 4 7 Peak Power: Ch78 [dBm] 21, 22 7.0 23 8 Max. Frequency Tolerance: Ch0 [kHz] -2.6 75 -75 9 Max. Frequency Tolerance: Ch39 [kHz] -2.2 75 -75 10 Max. Frequency Tolerance: Ch78 [kHz] -2.1 75 -75 11 Max. Drift: Ch0_DH1 [kHz] 3.6 25 -25 12 Max. Drift: Ch0_DH3 [kHz] 3.7 40 -40 13 Max. Drift: Ch0_DH5 [kHz] 4.0 40 -40 14 Max. Drift Rate: Ch0_DH1 [kHz] -2.6 20 -20 15 Max. Drift Rate: Ch0_DH3 [kHz] -3.2 20 -20 16 Max. Drift Rate: Ch0_DH5 [kHz] -3.3 20 -20 17 Max. Drift: Ch39_DH1 [kHz] 4.0 25 -25 18 Max. Drift: Ch39_DH3 [kHz] 4.3 40 -40 19 Max. Drift: Ch39_DH5 [kHz] 4.3 40 -40 20 Max. Drift Rate: Ch39_DH1 [kHz] -3.1 20 -20 21 Max. Drift Rate: Ch39_DH3 [kHz] -3.6 20 -20 22 Max. Drift Rate: Ch39_DH5 [kHz] -3.7 20 -20 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 23 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de No Characteristics Typ BT Spec Max BT Spec Min Class1 Class1 23 Max. Drift: Ch78_DH1 [kHz] 4.1 25 -25 24 Max. Drift: Ch78_DH3 [kHz] 4.5 40 -40 25 Max. Drift: Ch78_DH5 [kHz] 4.4 40 -40 26 Max. Drift Rate: Ch78_DH1 [kHz] -3.4 20 -20 27 Max. Drift Rate: Ch78_DH3 [kHz] -3.9 20 -20 28 Max. Drift Rate: Ch78_DH5 [kHz] -4.1 20 -20 29 Delta F1 Avg: Ch0 [kHz] 159.5 175 140 30 Delta F2 Max.: Ch0 [%] 100.0 99.9 31 Delta F2 Avg/Delta F1 Avg: Ch0 0.9 0.8 32 Delta F1 Avg: Ch39 [kHz] 159.8 175 140 33 Delta F2 Max.: Ch39 [%] 100.0 99.9 34 Delta F2 Avg/Delta F1 Avg: Ch39 0.9 0.8 35 Delta F1 Avg: Ch78 [kHz] 159.1 175 140 36 Delta F2 Max.: Ch78 [%] 100.0 99.9 37 Delta F2 Avg/Delta F1 Avg: Ch78 0.9 0.8 45 Sensitivity -93.0 -81 46 f(H)-f(L): Ch0 [kHz] 918.4 1000 47 f(H)-f(L): Ch39 [kHz] 918.3 1000 48 f(H)-f(L): Ch78 [kHz] 918.2 1000 49 ACPower -3: Ch3 [dBm] -51.5 -40 50 ACPower -2: Ch3 [dBm] -50.4 -40 51 ACPower -1: Ch3 [dBm] -18.5 52 ACPower Center: Ch3 [dBm] 8.1 20 4 53 ACPower +1: Ch3 [dBm] -19.2 54 ACPower +2: Ch3 [dBm] -50.7 -40 55 ACPower +3: Ch3 [dBm] -53.3 -40 56 ACPower -3: Ch39 [dBm] -51.6 -40 57 ACPower -2: Ch39 [dBm] -50.7 -40 58 ACPower -1: Ch39 [dBm] -19.0 59 ACPower Center: Ch39 [dBm] 7.7 20 4 60 ACPower +1: Ch39 [dBm] -19.7 61 ACPower +2: Ch39 [dBm] -50.9 -40 62 ACPower +3: Ch39 [dBm] -53.2 -40 63 ACPower -3: Ch75 [dBm] -51.7 -40 64 ACPower -2: Ch75 [dBm] -50.7 -40 65 ACPower -1: Ch75 [dBm] -19.2 66 ACPower Center: Ch75 [dBm] 7.5 20 4 67 ACPower +1: Ch75 [dBm] -20.0 68 ACPower +2: Ch75 [dBm] -51.0 -40 69 ACPower +3: Ch75 [dBm] -53.4 -40 70 omega i 2-DH5: Ch0 [kHz] -4.7 75 -75 71 omega o + omega i 2-DH5: Ch0 [kHz] -6.0 75 -75 72 omega o 2-DH5: Ch0 [kHz] -1.5 10 -10 73 DEVM RMS 2-DH5: Ch0 [%] 0.0 0.2 74 DEVM Peak 2-DH5: Ch0 [%] 0.1 0.35 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 24 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de No Characteristics Typ BT Spec Max BT Spec Min Class1 Class1 75 DEVM 99% 2-DH5: Ch0 [%] 100.0 99 76 omega i 3-DH5: Ch0 [kHz] -3.7 75 -75 77 omega o + omega i 3-DH5: Ch0 [kHz] -5.8 75 -75 78 omega o 3-DH5: Ch0 [kHz] -2.6 10 -10 79 DEVM RMS 3-DH5: Ch0 [%] 0.0 0.13 80 DEVM Peak 3-DH5: Ch0 [%] 0.1 0.25 81 DEVM 99% 3-DH5: Ch0 [%] 100.0 99 82 omega i 2-DH5: Ch39 [kHz] -4.8 75 -75 83 omega o + omega i 2-DH5: Ch39 [kHz] -6.1 75 -75 84 omega o 2-DH5: Ch39 [kHz] -1.4 10 -10 85 DEVM RMS 2-DH5: Ch39 [%] 0.0 0.2 86 DEVM Peak 2-DH5: Ch39 [%] 0.1 0.35 87 DEVM 99% 2-DH5: Ch39 [%] 100.0 99 88 omega i 3-DH5: Ch39 [kHz] -3.8 75 -75 89 omega o + omega i 3-DH5: Ch39 [kHz] -5.9 75 -75 90 omega o 3-DH5: Ch39 [kHz] -2.6 10 -10 91 DEVM RMS 3-DH5: Ch39 [%] 0.0 0.13 92 DEVM Peak 3-DH5: Ch39 [%] 0.1 0.25 93 DEVM 99% 3-DH5: Ch39 [%] 100.0 99 94 omega i 2-DH5: Ch78 [kHz] -4.9 75 -75 95 omega o + omega i 2-DH5: Ch78 [kHz] -6.2 75 -75 96 omega o 2-DH5: Ch78 [kHz] -1.4 10 -10 97 DEVM RMS 2-DH5: Ch78 [%] 0.0 0.2 98 DEVM Peak 2-DH5: Ch78 [%] 0.1 0.35 99 DEVM 99% 2-DH5: Ch78 [%] 100.0 99 100 omega i 3-DH5: Ch78 [kHz] -3.8 75 -75 101 omega o + omega i 3-DH5: Ch78 [kHz] -6.0 75 -75 102 omega o 3-DH5: Ch78 [kHz] -2.7 10 -10 103 DEVM RMS 3-DH5: Ch78 [%] 0.0 0.13 104 DEVM Peak 3-DH5: Ch78 [%] 0.1 0.25 105 DEVM 99% 3-DH5: Ch78 [%] 100.0 99 No Characteristics Condition Min Typ Max BT Spec Unit 1 Operation frequency range 2402 2480 MHz 2 Channel spacing 1 MHz 3 Input impedance 50 Ω GFSK, BER = 0.1% -93.0 -70 Pi/4-DQPSK, BER = 0.01% -92.5 -70 4 Sensitivity, Dirty Tx on 8DPSK, BER = 0.01% -85.5 -70 dBm CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 25 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de No Characteristics Condition Typ Max Unit 30 kHz to 1 GHz 20, 21, 22 -30 1 Tx and Rx out-of-band emissions Output signal = 7dBm 1 to 12.75 GHz 20, 21, 22 -30 dBm 2 2nd harmonic at 7dBm output power 20, 21, 22 -30 dBm 3 3rd harmonic at 7dBm output power 20, 21, 22 -30 dBm The values are measured conducted. Better suppression of the spurious emissions with an antenna can be expected as, antenna frequently have band pass filter characteristics. 13 SOLDERING TEMPERATURE-TIME PROFILE (FOR REFLOW SOLDERING) 13.1 FOR LEAD SOLDER Recommended temp. profile for reflow soldering Temp.[°C] Time [s] 235°C max. 220 ±5°C 200°C150 ±10°C 90 ±30s 10 ±1s 30 +20/-10s 20 Includes effects of frequency hopping 21 Average according FCC, IC and ETSI requirements. Above +7dBm output power (refer also to 22) the customer has to verify the final product against national regulations. 22 +7dBm related to power register value 18, according to TI service pack 2.30 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 26 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 13.2 FOR LEADFREE SOLDER Our used temp. profile for reflow soldering Temp.[°C] Time [s] 230°C -250°C max. 220°C150°C – 190°C 90 ±30s 30 +20/-10s Reflow permissible cycle: 2 Opposite side reflow is prohibited due to module weight. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 27 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 14 MODULE DIMENSION 14.1 MODULE DIMENSIONS PAN131X WITHOUT ANTENNA No. Item Dimension Tolerance Remark 1 Width 6.50 ± 0.20 2 Lenght 9.00 ± 0.20 3 Height 1.80 ± 0.20 With case PAN131X Module Drawing CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 28 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 14.2 MODULE DIMENSIONS PAN132X WITH ANTENNA No. Item Dimension Tolerance Remark 1 Width 9.50 ± 0.20 2 Lenght 9.00 ± 0.20 3 Height 1.80 ± 0.20 With case PAN132X Module Drawing CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 29 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 15 FOOTPRINT OF THE MODULE 15.1 FOOTPRINT PAN131X WITHOUT ANTENNA All dimensions are in millimeters. The outer dimensions have a tolerance of ± 0.2mm. The layout is symetric to center. The inner pins (2,4,6,9,11,14,16,18,21,23) are shifted to the center by 1mm. 0.901.706,500.901.809,00171513141211987653212324211819202210416Pad = 24 x 0.60mm x 0.60mmTop View1.802.702.953.95 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 30 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 15.2 FOOTPRINT PAN132X WITH ANTENNA All dimensions are in millimeters. The outer dimensions have a tolerance of ± 0.2mm. The layout is symetric to center. The inner pins (2,4,6,9,11,14,16,18,21,23) are shifted to the center by 1mm. 2.700.901.709.50171513141211987653212324211819202210416Pad = 28 x 0.60mm x 0.60mm1.80ACBD1.800.551.001.80 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 31 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 16 LABELING DRAWING The above pictures show the laser marking on the top case, this is only an example from PAN1315. 17 MECHANICAL REQUIREMENTS No. Item Limit Condition 1 Solderability More than 75% of the soldering area shall be coated by solder Reflow soldering with recommendable temperature profile 2 Resistance to soldering heat It shall be satisfied electrical requirements and not be mechanical damage See Chapter 13.2 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 32 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 18 RECOMMENDED FOOT PATTERN 18.1 RECOMMENDED FOOT PATTERN PAN131X WITHOUT ANTENNA Dimensions in mm. 171513141211987653212324211819202210416Pad = 24 x 0.60mm x 0.60mmTop View9,00 6,008,50 The land pattern dimensions above are meant to serve only as a guide. This information is provided without any legal liability. For the solder paste screen, use as a first guideline the same foot print as shown in the figure above. Solder paste screen cutouts (with slightly different dimensions) might be optimum depending on your soldering process. For example, the solder paste screen thickness chosen might have an effect. The solder screen thickness depends on your production standard 120μm to 150μm is recommended. IMPORTANT: Although the bottom side of PAN131X is fully coated, no copper such as through hole vias, planes or tracks on the board component layer should be located below the PAN131X to avoid creating a short. In cases where a track or through hole via has to be located under the module, it must be kept away from PAN131X bottom pads. The PAN131X multilayer pcb contains an inner RF shielding plane, therefore no pcb shielding plane below the module is needed. When using an onboard ceramic antenna, place the antenna on the edge of your carrier board (if allowable). If you have any questions on these points, contact your local Panasonic representative. Schematics and layouts may be sent to wireless@eu.panasonic.com for final review. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 33 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 18.2 RECOMMENDED FOOT PATTERN PAN132X WITH ANTENNA Dimensions in mm. The land pattern dimensions above are meant to serve only as a guide. For the solder paste screen, use as a first guideline the same foot print as shown in the Figure above. Solder paste screen cutouts (with slightly different dimensions) might be optimum depending on your soldering process. For example, the solder paste screen thickness chosen might have an effect. The solder screen thickness depends on your production standard 120μm to 150μm is recommended. IMPORTANT: In cases where a track or through hole via has to be located under the module, it must be kept away from PAN132X bottom pads. The PAN132X multilayer pcb contains an inner RF shielding plane, therefore no pcb shielding plane below the module is needed. If you have any questions on these points, contact your local Panasonic representative. Schematics and layouts may be sent to wireless@eu.panasonic.com for final review. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 34 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 19 LAYOUT RECOMMENDATIONS WITH ANTENNA (PAN132X) 20 BLUETOOTH LE (LOW ENERGY) PAN1316/26 20.1 NETWORK TOPOLOGY Bluetooth Low Energy is designed to reduce power consumption. It can be put into a sleep mode and is only activated for event activities such as sending files to a gateway, PC or mobile phone. Furthermore the maximum power consumption is set to less than 15 mA and the average power consumption is about 1 uA. The benefit of low energy consumption are short messages and establishing very fast connections (few ms). Using these techniques, energy consumption is reduced to a tenth of a Classic Bluetooth unit. Thus, a small coin cell – such as a CR2032 – is capable of powering a device for up to 10 years of operation. T o be backwards compatible with Classic Bluetooth and to be able to offer an affordable solution for very inexpensive devices, Panasonic Low Energy Bluetooth modules are offered in two versions: CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 35 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de Dual-mode: Bluetooth Low Energy technology combined with Classic Bluetooth functionality on a single module. Dual mode devices act as gateways between these two technologies. Single Mode: Bluetooth Low Energy technology to optimize power consumption, which is particularly useful for products powered by small batteries. These modules have embedded controllers allowing the module to operate autonomously in low cost applications that lack intelligence. This data sheet describes dual-mode Bluetooth Low Energy technology combined with Classic Bluetooth functionality on a single module. Additional information on Panasonic’s single mode products can be found by visiting www.panasonic.com/rfmodules or write an e-mail to wireless@eu.panasonic.com. 20.2 MODULE FEATURES Fully compliant with Bluetooth 4.0: • Optimized for proximity and sports use • Supports up to 10 simultaneous connections • Multiple sniff instances are tightly coupled to minimize power consumption • Independent buffering allows a large number of multiple connections without affecting BR/EDR performance • Includes built-in coexistence and prioritization handling for BR/EDR and LE CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 36 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 20.3 CURRENT CONSUMPTION FOR DIFFERENT LE SCENARIOS Conditions: VDD_IN = 3.6 V, 25°C, 26-MHz fast clock, nominal unit, 10 dBm output power Mode Description Average Current Unit Advertising, non-connectable Advertising in all 3 channels 1.28msec advertising interval 15Bytes advertise Data 104 μA Advertising, discoverable Advertising in all 3 channels 1.28msec advertising interval 15Bytes advertise Data 121 μA Scanning Listening to a single frequency per window 1.28msec scan interval 11.25msec scan window 302 μA Connected (master role) 500msec connection interval 0msec Slave connection latency Empty Tx/Rx LL packets 169 μA 21 ANT PAN1317/27 ANT+ (sometimes ANT + or ANT Plus) is an interoperability function that can be added to the base ANT protocol (a proprietary wireless sensor network technology).[ 21.1 NETWORK TOPOLOGY ANT™ is a wireless sensor network protocol operating in the 2.4 GHz spectrum. Designed for ultra-low power, ease of use, efficiency and scalability, ANT supports peer-to-peer, star, tree and fixed mesh topologies. It provides reliable data communications, flexible and adaptive network operation and cross-talk immunity. The ANT protocol stack is compact, requiring minimal microcontroller resources to reduce system costs, lighten the computational burden and improve efficiency. Low-level security is implemented to allow user-defined network security. PAN1317/1327 provides the first wireless, single-chip solution with dual-mode ANT and Bluetooth connectivity with inclusion of TI’s CC2567 device. This solution wirelessly connects 13 million ANT-based devices to the more than 3 billion Bluetooth endpoint devices used by people every day, creating new market opportunities for companies building ANT products and Bluetooth products alike. CC2567 requires 80% less board area than a design with two single-mode solutions (one ANT+, one Bluetooth) and increases the wireless transmission range up to two times the distance of a single-mode ANT+ solution. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 37 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 21.2 MODULE FEATURES Fully compliant with ANT protocol: • ANT solution optimized for fitness, health and consumers use cases • Supports up to eight simultaneous connections, various network topologies and high-resolution proximity pairing • Includes built-in coexistence and prioritization handling for BR/EDR and ANT Features Benefits Dual-mode ANT+ and Bluetooth (Bluetooth v2.1 + EDR) on a single chip - Requires 80% less board area than any dual module or device design - Reduces costs associated with incorporating two wireless technologies Fully validated optimized single antenna solution - Enables simultaneous operation of ANT+ and Bluetooth without the need for two devices or modules - Includes built-in coexistence Best-in-class Bluetooth and ANT RF performance: - +10 dBm Tx power with transmit power control - -93 dBm sensitivity - Delivers twice the distance between the aggregator and ANT sensor device than competitive single-mode ANT solutions - Enables a robust and high-throughput connection with extended range Support for: - ANT+ ultra low power (master and slave devices) - Bluetooth power saving modes (park, sniff, hold) - Bluetooth ultra low power modes (deep sleep, power down) - Improves battery life and power efficiency of the finished product Turnkey solution: - Fully integrated module - Complete development kit with software and documentation - TI MSP430 hardware and software platform integration (optional) - Ease of integration into system allows quick time to market - Reduces costs and time associated with certification 21.3 ANT CURRENT CONSUMPTION Mode Description Average Current Unit Rx message mode 250msec interval 380 μA Rx message mode 500msec interval 205 μA Rx message mode 1000msec interval 118 μA CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 38 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 22 TRIPLE MODE (BR/EDR + BLUETOOTH LOW ENERGY + ANT) PAN1323 The PAN1323 has been engineered to give designers the flexibility to implement Bluetooth Classic (BR/EDR), Bluetooth Low Energy and ANT into an application using a single module, reducing cost and footprint area. Refer to the paragraphs above for complete descriptions on each of the three protocols. The module is fully hardware compatible with the PAN1315, 15A, 16, 17, 25, 25A, 26 and 27. A highly efficent single RF block serves all three protocols. Protocols access the RF block using time division multiplexing. The application layer determines the priority and timing of the RF block.Customers interested in this unique module are encouraged to contact StoneStreetOne for a Bluetooth SIG certified stack. 22.1 TRIPLE MODE CURRENT CONSUMPTION The current consumption of the PAN1326 is a function of the protocol that the module is running at any point in time. Refer to the paragraphs above for details on current consumption for each of the three protocols or software vendor. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 39 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 23 DEVELOPMENT OF APPLICATIONS Mindtree Ltd. has developed a Bluetooth SPP freeware for TIs MSP430 and Panasonics PAN1315(A) and PAN1325(A). For other software refer to Chapter 24 or visit the following link www.panasonic.com/rfmodules. 23.1 TOOLS TO BE NEEDED PAN1323ETU Tool Source TI - MSP-EXP430F5438 - Experimenter Board MSP-EXP430F5438 TI - MSP-FET430UIF430 - Debugging Interface MSP-FET430UIF430 TI PAN1323EMK PAN1323EMK - Bluetooth Evaluation Module Kit for MSP430 Panasonic PAN1323ETU CC2567-PAN1327ANT-BTKIT For information on Bluetooth + ANT kit for PAN1327 CC2567 + PAN1327 wiki In addition you need the software development environment, e.g. IAR Embedded Workbench, refer to: http://wiki.msp430.com/index.php/MSP430_Bluetooth_Platform Evaluation kits and modules are available through Panasonic’s network of authorized distributors. For any additional information, please visit www.panasonic.com/rfmodules. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 40 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 24 LIST OF PROFILES Profile Software Developer Controller Availability Bluetooth SPP and others MindTree TI, MSP430 Now SPP Seeran STM32, MSP430 Now HDP, SPP Stollmann TI, MSP430 Now A2DP, AVRCP, SPP StoneStreetOne TI, Stellaris Now SPP and others ARS Multiple Now Bluetooth LE All ARS, MindTree, StoneStreetOne, Stollmann TI, MSP430 and others Upon request ANT Protocoll ANT Dynastream MSP430 and others Now Triple Mode Stack SPP StoneStreetOne MSP430 and others Now For all other profiles contact your local sales representative. 25 RELIABILITY TESTS The measurement should be done after being exposed to room temperature and humidity for 1 hour. No. Item Limit Condition 1 Vibration test Electrical parameter should be in specification a) Freq.:10~50Hz,Amplitude:1.5mm a) 20min. / cycle,1hrs. each of XYZ axis b) Freq.:30~100Hz, 6G b) 20min. / cycle,1hrs. each of XYZ axis 2 Shock test the same as above Dropped onto hard wood from height of 50cm for 3 times 3 Heat cycle test the same as above -40°C for 30min. and +85°C for 30min.; each temperature 300 cycles 4 Moisture test the same as above +60°C, 90% RH, 300h 5 Low temp. test the same as above -40°C, 300h 6 High temp. test the same as above +85°C, 300h CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 41 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 26 CAUTIONS Failure to follow the guidelines set forth in this document may result in degrading of the product’s functions and damage to the product. 26.1 DESIGN NOTES (1) Follow the conditions written in this specification, especially the control signals of this module. (2) The supply voltage has to be free of AC ripple voltage (for example from a battery or a low noise regulator output). For noisy supply voltages, provide a decoupling circuit (for example a ferrite in series connection and a bypass capacitor to ground of at least 47uF directly at the module). (3) This product should not be mechanically stressed when installed. (4) Keep this product away from heat. Heat is the major cause of decreasing the life of these products. (5) Avoid assembly and use of the target equipment in conditions where the products' temperature may exceed the maximum tolerance. (6) The supply voltage should not be exceedingly high or reversed. It should not carry noise and/or spikes. (7) Keep this product away from other high frequency circuits. 26.2 INSTALLATION NOTES (1) Reflow soldering is possible twice based on the conditions in Chapter 15. Set up the temperature at the soldering portion of this product according to this reflow profile. (2) Carefully position the products so that their heat will not burn into printed circuit boards or affect the other components that are susceptible to heat. (3) Carefully locate these products so that their temperatures will not increase due to the effects of heat generated by neighboring components. (4) If a vinyl-covered wire comes into contact with the products, then the cover will melt and generate toxic gas, damaging the insulation. Never allow contact between the cover and these products to occur. (5) This product should not be mechanically stressed or vibrated when reflowed. (6) To repair a board by hand soldering, keep the conditions of this chapter. (7) Do not wash this product. (8) Refer to the recommended pattern when designing a board. (9) Pressing on parts of the metal cover or fastening objects to the metal will cause damage to the unit. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 42 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 26. 3 USAGE CONDITIONS NOTES (1) T ake measures to protect the unit against static electricity. If pulses or other transient loads (a large load applied in a short time) are applied to the products, check and evaluate their operation befor assembly on the final products. (2) Do not use dropped products. (3) Do not touch, damage or soil the pins. (4) Follow the recommended condition ratings about the power supply applied to this product. (5) Electrode peeling strength: Do not add pressure of more than 4.9N when soldered on PCB. (6) Pressing on parts of the metal cover or fastening objects to the metal cover will cause damage. (7) These products are intended for general purpose and standard use in general electronic equipment, such as home appliances, office equipment, information and communication equipment. 26. 4 STORAGE NOTES (1) T he module should not be stressed mechanically during storage. (2) Do not store these products in the following conditions or the performance characteristics of the product, such as RF performance will be adversely affected: • St orage in salty air or in an environment with a high concentration of corrosive gas, such as Cl2, H2S, NH3, SO2, or NOX • Storage in direct sunlight • Storage in an environment where the temperature may be outside the range of 5°C to 35°C range, or where the humidity may be outside the 45 to 85% range. • Storage of the products for more than one year after the date of delivery Storage period: check the adhesive strength of the embossed tape and soldering after 6 months of storage. ( 3) Keep this product away from water, poisonous gas and corrosive gas. (4) This product should not be stressed or shocked when transported. (5) Follow the specification when stacking packed crates (max. 10). CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 43 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 26. 5 SAFETY CAUTIONS These specifications are intended to preserve the quality assurance of products and individual components. Before use, check and evaluate the operation when mounted on your products. Abide by these specifications, without deviation when using the products. These products may short-circuit. If electrical shocks, smoke, fire, and/or accidents involving human life are anticipated when a short circuit occurs, then provide the following failsafe functions, as a minimum. (1) Ensure the safety of the whole system by installing a protection circuit and a protection device. (2) Ensure the safety of the whole system by installing a redundant circuit or another system to prevent a single fault causing an unsafe status. 26. 6 OTHER CAUTIONS (1) T his specification sheet is copyrighted. (2) Do not use the products for other purposes than those listed. (3) Be sure to provide an appropriate fail-safe function on your product to prevent an additional damage that may be caused by the abnormal function or the failure of the product. (4) This product has been manufactured without any ozone chemical controlled under the Montreal Protocol. (5) These products are not intended for other uses, other than under the special conditions shown below. Before using these products under such special conditions, check their performance and reliability under the said special conditions carefully to determine whether or not they can be used in such a manner. • In liquid, such as water, salt water, oil, alkali, or organic solvent, or in places where liquid may splash. • In direct sunlight, outdoors, or in a dusty environment • In an environment where condensation occurs. • In an environment with a high concentration of harmful gas (e.g. salty air, HCl, Cl2, SO2, H2S, NH3, and NOX) ( 6) If an abnormal voltage is applied due to a problem occurring in other components or circuits, replace these products with new products because they may not be able to provide normal performance even if their electronic characteristics and appearances appear satisfactory. (7) When you have any question or uncertainty, contact Panasonic. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 44 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 27 PACKAGING 27 .1 PACKAGING OF PAN131X WITHOUT ANTENNA Tape Dimension Packing in Tape trailer (empty)1 x circumference /hub(min 160mm)component packed areastandard 1500pcsleader (empty)minimum 10 pitchTop cover tape more than 1 x circumference plus 100mm to avoid fixing of tape end on sealed modules.Direction of unreeling (for customer)PAN1315 01/01ENW89809M5AYYWWDLLFCC ID: T7V1315Machine readable 2D-BarcodePAN1315 01/01ENW89809M5AYYWWDLLFCC ID: T7V1315Machine readable 2D-Barcode Empty spaces in component packed area shall be less than two per reel and those spaces shall not be consecutive. Top cover tape shall not be found on reel holes and shall not stick out from reel. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 45 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de Component direction PAN1315 01/01ENW89809M5AYYWWDLLFCC ID: T7V1315Machine readable 2D-Barcode Reel dimension A BD NW2MAXMINMIN±1.0MAX13 +0.525.0 +2.024.4 +3.0 -0.2 -0.0 -0.5*Latch (2PC)All dimensions in millimeters unless otherwise stated Assembly Method24mm330.01.520.2100.030.4*LatchTAPE SIZECW1W3 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 46 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de Label for Package PAN1315Customer CodeENW89818C2JF105 mm (1T) Lotcode [YYWWDLL] Example from above: YY year printed 08 WW normal calendar week printed 01 D day printed 5 (Friday) L line identifier, if more as one printed 1 L lot identifier per day printed 1 (1P) Customer Order Code, if any, otherwise company name will be printed (2P) Panasonic Order Code fix as ENW89818C2JF (9D) Datecode as [YYWW] (Q) Quantity [XXXX], variable max. 1500 (HW/SW) Hardware /Software Release Total Package CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 47 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 27.2 PACKAGING FOR PAN132X WITH ANTENNA Tape Dimension Measured from centreline of sprocket holeMeasured holeCumulative tolerance of 10 sprocketMeasured from centreline of sprocketto centreline of pocket.holes is ± 0.20 .hole to centreline of pocket.(I)(II)(III)(IV)Other material available.ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE STATED.WFP1+/-0.10+/-0.10+/-0.307.5012.0016.00K12.00+/-0.102.80+/-0.10+/-0.109.40BoKo9.90Ao+/-0.10 Tooling code: Flatbed -9 Estimated Max Length: 72m per 22B3 YYXXSECTION Y-Y SCALE 3.5 : 1SECTION X-X SCALE 3.5 : 1 Packing in Tape All other packaging information is similar to Chapter 27.1 Pin1 Marking CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 48 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 28 O RDERING INFORMATION Version Function Controller Part number Antenna on board Notes MOQ (1) PAN1315(2) CC2560 ENW89818C2JF NO PAN1315A Bluetooth v2.1 + EDR CC2560A ENW89829C2JF NO CC2560A offers reductions in init script size over CC2560 and is recommended for all new designs 1500 PAN1325(2) CC2560 ENW89818A2JF YES PAN1325A Bluetooth v2.1 + EDR CC2560A ENW89829A2JF YES CC2560A offers reductions in init script size over CC2560 and is recommended for all new designs. 1500 PAN1316 Bluetooth v2.1 + EDR BLE 4.0 CC2564 ENW89823C2JF NO 1500 PAN1326 Bluetooth v2.1 + EDR BLE 4.0 CC2564 ENW89823C2JF YES 1500 PAN1317 Bluetooth v2.1 + EDR ANT CC2567 ENW89827C2JF NO 1500 PAN1327 Bluetooth v2.1 + EDR ANT CC2567 ENW89827A2JF YES 1500 PAN1323 Bluetooth v2.1 + EDR BLE 4.0 ANT CC2569 ENW89842A2JF YES Check with your software developer for details on triple mode functionality. 1500 PAN1323ETU Bluetooth v2.1 + EDR BLE 4.0 ANT CC25xx ENW89825A2JF YES Evaluation kit for the whole series. PAN1315-PAN1327. 1 Notes: (1 ) Abbreviation for Minimum Order Quantity (MOQ). The standard MOQ for mass production are 1500 pieces, fewer only on customer demand. Samples for evaluation can be delivered at any quantity. (2) Not recommended for new designs, please refer to Chapter 1.1 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 49 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 29 ROHS DECLARATION Declaration of environmental compatibility for supplied products: Hereby we declare to our best present knowledge based on declaration of our suppliers that this product do not contain by now the following substances which are banned by Directive 2002/95/EC (RoHS) or if contain a maximum concentration of 0,1% by weight in homogeneous materials for • Le ad and lead compounds • M ercury and mercury compounds • Chromium (VI) • PBB (polybrominated biphenyl) category • PBDE (polybrominated biphenyl ether) category And a maximum concentration of 0,01% by weight in homogeneous materials for • Cadmium and cadmium compounds 3 0 DATA SHEET STATUS This data sheet contains the final specification (RELEASE). Panasonic reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Supplementary data will be published at a later date. Consult the most recently issued data sheet before initiating or completing a design. Use this URL to search for the most recent version of this data sheet: PAN13xx Latest Data Sheet! CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 50 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 3 1 HISTORY FOR THIS DOCUMENT Revision Date Modification / Remarks 0.90 18.12.2009 1st preliminary version 0.95 01.03.2010 Updated Chapter 14.2 and 28. 0.96 Not released Change ESD Information on foot note 7 in chapter Pin Description 0.97 25.03.2010 Various updates. Deleted links to TI Datasheet. 0.98 21.04.2010 Updated Links Some minor changes in Chapter 8 and 9.1 and change the base for the values in Chapter 9. 0.99 22.10.2010 Adopted changes according to CC2560 Datasheet. Included Interface Description, performance values. Not released. 1.00 04.11.2010 1st internal Release. 1.01 03.12.2010 Included reference to PAN1325 Application Note. AN-1325-2420-111.pdf 1.02 10.01.2011 Changed wording in Chapter 34.2 ” Industry Canada Certification ”. 1.03 23.05.2011 Included DOC for PAN1315 series. Included PAN13xx ANT and BLE Addendum Rev1.x.pdf reference. Included Note for IO voltage and MLD_OUT pin. 1.04 02.07.2011 Corrected wording in Chapter 34.3 Europ ean R&TTE Declaration of Conformity . 1.05 28.10.2011 Including CC2560A silicon PAN1315A HW40 at Chapter 1.1, Chapter and Chapter 0. Deleted ES label in Chapter 1.06 15.11.2011 Added overview for the core specification and their addendums. Updated front page. Updated Related Documents. 3.00 11.01.2012 Merging PAN13xx documents into this specification and correct some format 3.10 16.01.2012 Minor mistakes fixed 3.20 29.05.2012 DoC replaced with revised version 3.30 11.06.2012 Added triple mode stack Module PAN1323, add PAN1323 to ordering and software information overview, Software Block Diagram added, Bluetooth Inter IC-Sound chapter information added Layout Recommandations with Antenna added, Application Note LGA added 3.31 27.06.2012 Added design information to use low pass filter (chapter 11.1 / 11.9) for better noise surpression when using PCM interface 3.40 18.07.2012 Re-organize chapter Re gulatory Information and added 2 chapters 1. NCC St atement (only valid for PAN1325) 2. Blu etooth SIG Statement 3. Chapter 11.9, Second Paragraph was updated 4. Link in Chapter 34.1.1. was fixed 32 RELATED DOCUMENTS For an update, search in the suitable homepage. [1 ] PAN1323ETU Design-Guide: http://www.panasonic.com/industrial/includes/pdf/PAN1323ETUDesignGuide.pdf [2 ] CC2560 Product Bulletin: http://focus.ti.com/pdfs/wtbu/cc2560_slyt377.pdf [3] Bluetooth SW for MSP430 is supported by IAR IDE service pack 5.10.6 and later. Use full IAR version edition (not the kick-start version). You can find info on IAR at http://www.iar.com/website1/1.0.1.0/3/1/ and www.MSP430.com . Note, that there is an option for a 30-day free version of IAR evaluation edition. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 51 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de [4] PAN13xx CAD data: http://www.pedeu.panasonic.de/pdf/174ext.zip [5] Application Note Land Grid Array: http://www.pedeu.panasonic.de/pdf/184ext.pdf CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 52 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 33 GENERAL INFORMATION © Panasonic Industrial Devices Europe GmbH. All rights reserved. This document may contain errors. Panasonic reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its literature at any time. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to Panasonic’s terms and conditions of sale supplied at the time of order acknowledgment. If we deliver ES samples to the customer, these samples have the status Engineering Samples. This means, the design of this product is not yet concluded. Engineering Samples may be partially or fully functional, and there may be differences to be published Data Sheet. Engineering Samples are not qualified and are not to be used for reliability testing or series production. Disclaimer: Customer acknowledges that samples may deviate from the Data Sheet and may bear defects due to their status of development and the lack of qualification mentioned above. Panasonic rejects any liability or product warranty for Engineering Samples. In particular, Panasonic disclaims liability for damages caused by • th e use of the Engineering Sample other than for Evaluation Purposes, particularly the installation or integration in an other product to be sold by Customer, • de viation or lapse in function of Engineering Sample, • im proper use of Engineering Samples. Panasonic disclaimes any liability for consequential and incidental damages. Panasonic assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using Panasonic components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. In case of any questions, contact your local sales representative. 34 REGULATORY INFORMATION 34 .1 FCC FOR US 3 4.1.1 FCC Notice The devices PAN13xx, for details refer to Chapter 28 in this document, including the antennas, which are listed in Chapter 34.5 of this data sheet, complies with Part 15 of the FCC Rules. The device meets the requirements for modular transmitter approval as detailed in FCC public Notice DA00-1407.transmitter. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 53 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 3 4.1.2 Caution The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Panasonic Industrial Devices Europe GmbH may void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • I ncrease the separation between the equipment and receiver. • Con nect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consu lt the dealer or an experienced radio/TV technician for help 34.1.3 Labeling Requirements The Original Equipment Manufacturer (OEM) must ensure that FCC labeling requirements are met. This includes a clearly visible label on the outside of the OEM enclosure specifying the appropriate Panasonic FCC identifier for this product as well as the FCC Notice above. The FCC identifier are FCC ID: T7V1315. This FCC identifier is valid for all PAN13xx modules, for details, see the Chapter 28. Ordering Information. In any case the end product must be labelled exterior with "Contains FCC ID: T7V1315" 3 4.1.4 Antenna Warning For the related part number of PAN13xx refer to Chapter 28. Ordering Information. This devices are tested with a standard SMA connector and with the antennas listed below. When integrated in the OEMs product, these fixed antennas require installation preventing end-users from replacing them with non-approved antennas. Any antenna not in the following table must be tested to comply with FCC Section 15.203 for unique antenna connectors and Section 15.247 for emissions. The FCC identifier for this device with the antenna listed in item 1 are the same (FCC ID: T7V1315). 3 4.1.5 Approved Antenna List Note: We are able to qualify your antenna and will add to this list as that process is completed. Item Part Number Manufacturer Frequency Band Type Gain (dBi) 1 2450AT43B100 Johanson Technologies 2.4GHz Chip-Antenna +1.3 2 LDA212G3110K Murata 2.4GHz Chip-Antenna +0.9 3 4788930245 Würth Elektronik 2.4GHz Chip-Antenna +0.5 CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 54 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 3 4.1.6 RF Exposure PAN13xx To comply with FCC RF Exposure requirements, the Original Equipment Manufacturer (OEM) must ensure that the approved antenna in the previous table must be installed. The preceding statement must be included as a CAUTION statement in manuals for products operating with the approved antennas in the previous table to alert users on FCC RF Exposure compliance. Any notification to the end user of installation or removal instructions about the integrated radio module is not allowed. The radiated output power of PAN13xx with mounted ceramic antenna (FCC ID: T7V1315) is far below the FCC radio frequency exposure limits. Nevertheless, the PAN13xx shall be used in such a manner that the potential for human contact during normal operation is minimized. End users may not be provided with the module installation instructions. OEM integrators and end users must be provided with transmitter operating conditions for satisfying RF exposure compliance. 34.2 INDUSTRY CANADA CERTIFICATION PAN1315 is licensed to meet the regulatory requirements of Industry Canada (IC), license: IC: 216Q-1315 Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any regulatory questions and ensure compliance for SAR and/or RF exposure limits. Users can obtain Canadian information on RF exposure and compliance from www.ic.gc.ca. This device has been designed to operate with the antennas listed in Table 20 above, having a maximum gain of 1.3 dBi. Antennas not included in this list or having a gain greater than 1.3 dBi are strictly prohibited for use with this device. The required antenna impedance is 50 ohms. The antenna used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. due to the model size the IC identifier is displayed in the installation instruction. 34.3 EUROPEAN R&TTE DECLARATION OF CONFORMITY Hereby, Panasonic Industrial Devices Europe GmbH, declares that the Bluetooth module PAN1315 and their versions is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC. As a result of the conformity assessment procedure described in Annex III of the Directive 1999/5/EC, the end-customer equipment should be labelled as follows: PAN13xx and their versions in the specified reference design can be used in the following countries: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, The Netherlands, the United Kingdom, Switzerland, and Norway. CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 55 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 56 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de 34.4 N CC FOR TAIWAN 34.4.1 Labeling Requirements Due to the limited size on the module, the NCC ID is not visible on the module. When the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains Transmitter Module NCC ID:” or “Contains NCC ID:” CCAJ11LPxxxxTx Any similar wording that expresses the same meaning may be used. Panasonic is able to provide the above content from the label as a vector graphic, please ask at wireless@eu.panasonic.com. 34.4.2 NCC Statement Due to the national rule from Taiwan we have to print the below statement in Chinese language. 􀀒􀀏􀀒􀭋􀉤􀉚􀫢􀀒􀀏􀀔􀭋􀉤􀌬􀫢􀀒􀀏􀀓􀺾􀛨􀏌􁂩􁗇􀎥􀣸􀊘􀐭􀌌􀬟􀢛􁎖􀽥􁋚􀁤􀚢􀺾􀮢􀌙􀁤􀊮􀌡􀁥􀨠􀻮􀗐􀔴􀍜􀙫􀑩􀊔􀩻􁊸􀐆􁜊􀒻􁎖􀬟􀁥􀌋􀉽􀌌􀬟􀗐􁜊􀒻􀡡􀮣􀠇􀊘􀤤􀗌􀊿􀌌􀦐􀁦􀀒􀀏􀀕􀐭􀌌􀬟􀢛􁎖􀽥􁋚􀊘􀔴􀍜􀊔􀩻􁅂􁚤􀠭􀦘􀏄􀎌􀊿􀊍􁓔􀎥􀘬􀮷􀚦􀁩􀺾􀳯􀬤􀏞􀊍􁓔􀬤􀵥􀣛􀁤􁏐􀍭􀑃􀧾􀍜􀁤􀔨􀒷􀴛􀐇􀳌􀊍􁓔􀣛􀋙􀩻􁘱􁚃􀔴􀍜􀁦􀛃􀶰􀎥􀘬􀮷􀚦􀁤􀜸􀔱􀽥􀚦􀘬􀮝􀖛􀐪􀸸􀊘􀳌􁇞􀽥􀮷􀚦􀁦􀐭􀌌􀬟􀢛􁎖􀽥􁋚􀶲􀒜􀕡􀎥􀘬􀮷􀚦􀗐􀊈􀸸􀁥􀟅􁊪􀊿􁔼􁐕􀍜􀽥􀘪􁍧􀢛􀗌􀽥􁋚􀮣􀯪􀊘􀊍􁓔􀁦􀣬􁊽􀀯􀀤􀀤􀐭􀌌􀬟􀽥􀘪􁍧􀢛􀗌􀽥􁋚􁁍􀬣􁍬􀘬􀀁􀮝􀖛􀀛 34.5 BLUETOOTH SIG STATEMENT 35 L IFE SUPPORT POLICY This Panasonic product is not designed for use in life support appliances, devices, or systems where malfunction can reasonably be expected to result in a significant personal injury to the user, or as a critical component in any life support device or system whose failure to perform can be reasonably expected to cause the failure of the CLASSIFICATION PRODUCT SPECIFICATION No. DS-13xx-2400-102 REV. 3.40 SUBJECT CLASS 1 or 2 BLUETOOTH MODULE PAGE 57 of 57 CUSTOMER’S CODE PAN13XX Core Specification PANASONIC’S CODE See Chapter 28. Ordering Information DATE 18.07.2012 PANASONIC INDUSTRIAL DEVICES EUROPE GMBH www.pedeu.pansonic.de life support device or system, or to affect its safety or effectiveness. Panasonic customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Panasonic for any damages resulting. LM3S8933 Microcontroller DATA SHEET DS-LM3S8933-2550 Copyright © 2007-2008 Luminary Micro, Inc. PRELIMINARY Legal Disclaimers and Trademark Information INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH LUMINARY MICRO PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN LUMINARY MICRO'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, LUMINARY MICRO ASSUMES NO LIABILITY WHATSOEVER, AND LUMINARY MICRO DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF LUMINARY MICRO'S PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. LUMINARY MICRO'S PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL, LIFE SAVING, OR LIFE-SUSTAINING APPLICATIONS. Luminary Micro may make changes to specifications and product descriptions at any time, without notice. Contact your local Luminary Micro sales office or your distributor to obtain the latest specifications before placing your product order. Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Luminary Micro reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. Copyright © 2007-2008 Luminary Micro, Inc. All rights reserved. Stellaris, Luminary Micro, and the Luminary Micro logo are registered trademarks of Luminary Micro, Inc. or its subsidiaries in the United States and other countries. ARM and Thumb are registered trademarks and Cortex is a trademark of ARM Limited. Other names and brands may be claimed as the property of others. Luminary Micro, Inc. 108 Wild Basin, Suite 350 ® Austin, TX 78746 Main: +1-512-279-8800 Fax: +1-512-279-8879 http://www.luminarymicro.com 2 March 17, 2008 Preliminary Table of Contents About This Document .................................................................................................................... 20 Audience .............................................................................................................................................. 20 About This Manual ................................................................................................................................ 20 Related Documents ............................................................................................................................... 20 Documentation Conventions .................................................................................................................. 20 1 Architectural Overview ...................................................................................................... 22 1.1 Product Features ...................................................................................................................... 22 1.2 Target Applications .................................................................................................................... 27 1.3 High-Level Block Diagram ......................................................................................................... 28 1.4 Functional Overview .................................................................................................................. 28 1.4.1 ARM Cortex™-M3 ..................................................................................................................... 29 1.4.2 Motor Control Peripherals .......................................................................................................... 29 1.4.3 Analog Peripherals .................................................................................................................... 30 1.4.4 Serial Communications Peripherals ............................................................................................ 30 1.4.5 System Peripherals ................................................................................................................... 32 1.4.6 Memory Peripherals .................................................................................................................. 33 1.4.7 Additional Features ................................................................................................................... 33 1.4.8 Hardware Details ...................................................................................................................... 34 2 ARM Cortex-M3 Processor Core ...................................................................................... 35 2.1 Block Diagram .......................................................................................................................... 36 2.2 Functional Description ............................................................................................................... 36 2.2.1 Serial Wire and JTAG Debug ..................................................................................................... 36 2.2.2 Embedded Trace Macrocell (ETM) ............................................................................................. 37 2.2.3 Trace Port Interface Unit (TPIU) ................................................................................................. 37 2.2.4 ROM Table ............................................................................................................................... 37 2.2.5 Memory Protection Unit (MPU) ................................................................................................... 37 2.2.6 Nested Vectored Interrupt Controller (NVIC) ................................................................................ 37 3 Memory Map ....................................................................................................................... 41 4 Interrupts ............................................................................................................................ 43 5 JTAG Interface .................................................................................................................... 46 5.1 Block Diagram .......................................................................................................................... 47 5.2 Functional Description ............................................................................................................... 47 5.2.1 JTAG Interface Pins .................................................................................................................. 48 5.2.2 JTAG TAP Controller ................................................................................................................. 49 5.2.3 Shift Registers .......................................................................................................................... 50 5.2.4 Operational Considerations ........................................................................................................ 50 5.3 Initialization and Configuration ................................................................................................... 53 5.4 Register Descriptions ................................................................................................................ 53 5.4.1 Instruction Register (IR) ............................................................................................................. 53 5.4.2 Data Registers .......................................................................................................................... 55 6 System Control ................................................................................................................... 57 6.1 Functional Description ............................................................................................................... 57 6.1.1 Device Identification .................................................................................................................. 57 6.1.2 Reset Control ............................................................................................................................ 57 March 17, 2008 3 Preliminary LM3S8933 Microcontroller 6.1.3 Power Control ........................................................................................................................... 60 6.1.4 Clock Control ............................................................................................................................ 60 6.1.5 System Control ......................................................................................................................... 62 6.2 Initialization and Configuration ................................................................................................... 63 6.3 Register Map ............................................................................................................................ 64 6.4 Register Descriptions ................................................................................................................ 65 7 Hibernation Module .......................................................................................................... 119 7.1 Block Diagram ........................................................................................................................ 120 7.2 Functional Description ............................................................................................................. 120 7.2.1 Register Access Timing ........................................................................................................... 120 7.2.2 Clock Source .......................................................................................................................... 121 7.2.3 Battery Management ............................................................................................................... 121 7.2.4 Real-Time Clock ...................................................................................................................... 121 7.2.5 Non-Volatile Memory ............................................................................................................... 122 7.2.6 Power Control ......................................................................................................................... 122 7.2.7 Interrupts and Status ............................................................................................................... 122 7.3 Initialization and Configuration ................................................................................................. 123 7.3.1 Initialization ............................................................................................................................. 123 7.3.2 RTC Match Functionality (No Hibernation) ................................................................................ 123 7.3.3 RTC Match/Wake-Up from Hibernation ..................................................................................... 123 7.3.4 External Wake-Up from Hibernation .......................................................................................... 124 7.3.5 RTC/External Wake-Up from Hibernation .................................................................................. 124 7.4 Register Map .......................................................................................................................... 124 7.5 Register Descriptions .............................................................................................................. 125 8 Internal Memory ............................................................................................................... 138 8.1 Block Diagram ........................................................................................................................ 138 8.2 Functional Description ............................................................................................................. 138 8.2.1 SRAM Memory ........................................................................................................................ 138 8.2.2 Flash Memory ......................................................................................................................... 139 8.3 Flash Memory Initialization and Configuration ........................................................................... 140 8.3.1 Flash Programming ................................................................................................................. 140 8.3.2 Nonvolatile Register Programming ........................................................................................... 141 8.4 Register Map .......................................................................................................................... 141 8.5 Flash Register Descriptions (Flash Control Offset) ..................................................................... 142 8.6 Flash Register Descriptions (System Control Offset) .................................................................. 149 9 General-Purpose Input/Outputs (GPIOs) ....................................................................... 162 9.1 Functional Description ............................................................................................................. 162 9.1.1 Data Control ........................................................................................................................... 163 9.1.2 Interrupt Control ...................................................................................................................... 164 9.1.3 Mode Control .......................................................................................................................... 165 9.1.4 Commit Control ....................................................................................................................... 165 9.1.5 Pad Control ............................................................................................................................. 165 9.1.6 Identification ........................................................................................................................... 165 9.2 Initialization and Configuration ................................................................................................. 165 9.3 Register Map .......................................................................................................................... 167 9.4 Register Descriptions .............................................................................................................. 169 4 March 17, 2008 Preliminary Table of Contents 10 General-Purpose Timers ................................................................................................. 204 10.1 Block Diagram ........................................................................................................................ 204 10.2 Functional Description ............................................................................................................. 205 10.2.1 GPTM Reset Conditions .......................................................................................................... 206 10.2.2 32-Bit Timer Operating Modes .................................................................................................. 206 10.2.3 16-Bit Timer Operating Modes .................................................................................................. 207 10.3 Initialization and Configuration ................................................................................................. 211 10.3.1 32-Bit One-Shot/Periodic Timer Mode ....................................................................................... 211 10.3.2 32-Bit Real-Time Clock (RTC) Mode ......................................................................................... 212 10.3.3 16-Bit One-Shot/Periodic Timer Mode ....................................................................................... 212 10.3.4 16-Bit Input Edge Count Mode ................................................................................................. 213 10.3.5 16-Bit Input Edge Timing Mode ................................................................................................ 213 10.3.6 16-Bit PWM Mode ................................................................................................................... 214 10.4 Register Map .......................................................................................................................... 214 10.5 Register Descriptions .............................................................................................................. 215 11 Watchdog Timer ............................................................................................................... 240 11.1 Block Diagram ........................................................................................................................ 240 11.2 Functional Description ............................................................................................................. 240 11.3 Initialization and Configuration ................................................................................................. 241 11.4 Register Map .......................................................................................................................... 241 11.5 Register Descriptions .............................................................................................................. 242 12 Analog-to-Digital Converter (ADC) ................................................................................. 263 12.1 Block Diagram ........................................................................................................................ 264 12.2 Functional Description ............................................................................................................. 264 12.2.1 Sample Sequencers ................................................................................................................ 264 12.2.2 Module Control ........................................................................................................................ 265 12.2.3 Hardware Sample Averaging Circuit ......................................................................................... 266 12.2.4 Analog-to-Digital Converter ...................................................................................................... 266 12.2.5 Differential Sampling ............................................................................................................... 266 12.2.6 Test Modes ............................................................................................................................. 268 12.2.7 Internal Temperature Sensor .................................................................................................... 268 12.3 Initialization and Configuration ................................................................................................. 269 12.3.1 Module Initialization ................................................................................................................. 269 12.3.2 Sample Sequencer Configuration ............................................................................................. 269 12.4 Register Map .......................................................................................................................... 269 12.5 Register Descriptions .............................................................................................................. 270 13 Universal Asynchronous Receivers/Transmitters (UARTs) ......................................... 296 13.1 Block Diagram ........................................................................................................................ 297 13.2 Functional Description ............................................................................................................. 297 13.2.1 Transmit/Receive Logic ........................................................................................................... 297 13.2.2 Baud-Rate Generation ............................................................................................................. 298 13.2.3 Data Transmission .................................................................................................................. 299 13.2.4 Serial IR (SIR) ......................................................................................................................... 299 13.2.5 FIFO Operation ....................................................................................................................... 300 13.2.6 Interrupts ................................................................................................................................ 300 13.2.7 Loopback Operation ................................................................................................................ 301 13.2.8 IrDA SIR block ........................................................................................................................ 301 13.3 Initialization and Configuration ................................................................................................. 301 March 17, 2008 5 Preliminary LM3S8933 Microcontroller 13.4 Register Map .......................................................................................................................... 302 13.5 Register Descriptions .............................................................................................................. 303 14 Synchronous Serial Interface (SSI) ................................................................................ 337 14.1 Block Diagram ........................................................................................................................ 337 14.2 Functional Description ............................................................................................................. 337 14.2.1 Bit Rate Generation ................................................................................................................. 338 14.2.2 FIFO Operation ....................................................................................................................... 338 14.2.3 Interrupts ................................................................................................................................ 338 14.2.4 Frame Formats ....................................................................................................................... 339 14.3 Initialization and Configuration ................................................................................................. 346 14.4 Register Map .......................................................................................................................... 347 14.5 Register Descriptions .............................................................................................................. 348 15 Inter-Integrated Circuit (I2C) Interface ............................................................................ 374 15.1 Block Diagram ........................................................................................................................ 374 15.2 Functional Description ............................................................................................................. 374 15.2.1 I2C Bus Functional Overview .................................................................................................... 375 15.2.2 Available Speed Modes ........................................................................................................... 377 15.2.3 Interrupts ................................................................................................................................ 378 15.2.4 Loopback Operation ................................................................................................................ 378 15.2.5 Command Sequence Flow Charts ............................................................................................ 379 15.3 Initialization and Configuration ................................................................................................. 385 15.4 I2C Register Map ..................................................................................................................... 386 15.5 Register Descriptions (I2C Master) ........................................................................................... 387 15.6 Register Descriptions (I2C Slave) ............................................................................................. 400 16 Controller Area Network (CAN) Module ......................................................................... 409 16.1 Controller Area Network Overview ............................................................................................ 409 16.2 Controller Area Network Features ............................................................................................ 409 16.3 Controller Area Network Block Diagram .................................................................................... 410 16.4 Controller Area Network Functional Description ......................................................................... 410 16.4.1 Initialization ............................................................................................................................. 411 16.4.2 Operation ............................................................................................................................... 411 16.4.3 Transmitting Message Objects ................................................................................................. 412 16.4.4 Configuring a Transmit Message Object .................................................................................... 412 16.4.5 Updating a Transmit Message Object ....................................................................................... 413 16.4.6 Accepting Received Message Objects ...................................................................................... 413 16.4.7 Receiving a Data Frame .......................................................................................................... 413 16.4.8 Receiving a Remote Frame ...................................................................................................... 413 16.4.9 Receive/Transmit Priority ......................................................................................................... 414 16.4.10 Configuring a Receive Message Object .................................................................................... 414 16.4.11 Handling of Received Message Objects .................................................................................... 415 16.4.12 Handling of Interrupts .............................................................................................................. 415 16.4.13 Bit Timing Configuration Error Considerations ........................................................................... 416 16.4.14 Bit Time and Bit Rate ............................................................................................................... 416 16.4.15 Calculating the Bit Timing Parameters ...................................................................................... 418 16.5 Controller Area Network Register Map ...................................................................................... 420 16.6 Register Descriptions .............................................................................................................. 421 6 March 17, 2008 Preliminary Table of Contents 17 Ethernet Controller .......................................................................................................... 449 17.1 Block Diagram ........................................................................................................................ 450 17.2 Functional Description ............................................................................................................. 450 17.2.1 Internal MII Operation .............................................................................................................. 450 17.2.2 PHY Configuration/Operation ................................................................................................... 451 17.2.3 MAC Configuration/Operation .................................................................................................. 452 17.2.4 Interrupts ................................................................................................................................ 455 17.3 Initialization and Configuration ................................................................................................. 455 17.4 Ethernet Register Map ............................................................................................................. 456 17.5 Ethernet MAC Register Descriptions ......................................................................................... 457 17.6 MII Management Register Descriptions ..................................................................................... 475 18 Analog Comparators ....................................................................................................... 494 18.1 Block Diagram ........................................................................................................................ 495 18.2 Functional Description ............................................................................................................. 495 18.2.1 Internal Reference Programming .............................................................................................. 497 18.3 Initialization and Configuration ................................................................................................. 498 18.4 Register Map .......................................................................................................................... 498 18.5 Register Descriptions .............................................................................................................. 499 19 Pin Diagram ...................................................................................................................... 507 20 Signal Tables .................................................................................................................... 509 20.1 100-Pin LQFP Package Pin Tables ........................................................................................... 509 20.2 108-Pin BGA Package Pin Tables ............................................................................................ 520 21 Operating Characteristics ............................................................................................... 534 22 Electrical Characteristics ................................................................................................ 535 22.1 DC Characteristics .................................................................................................................. 535 22.1.1 Maximum Ratings ................................................................................................................... 535 22.1.2 Recommended DC Operating Conditions .................................................................................. 535 22.1.3 On-Chip Low Drop-Out (LDO) Regulator Characteristics ............................................................ 536 22.1.4 Power Specifications ............................................................................................................... 536 22.1.5 Flash Memory Characteristics .................................................................................................. 538 22.2 AC Characteristics ................................................................................................................... 538 22.2.1 Load Conditions ...................................................................................................................... 538 22.2.2 Clocks .................................................................................................................................... 538 22.2.3 Analog-to-Digital Converter ...................................................................................................... 539 22.2.4 Analog Comparator ................................................................................................................. 540 22.2.5 I2C ......................................................................................................................................... 540 22.2.6 Ethernet Controller .................................................................................................................. 541 22.2.7 Hibernation Module ................................................................................................................. 544 22.2.8 Synchronous Serial Interface (SSI) ........................................................................................... 544 22.2.9 JTAG and Boundary Scan ........................................................................................................ 546 22.2.10 General-Purpose I/O ............................................................................................................... 547 22.2.11 Reset ..................................................................................................................................... 548 23 Package Information ........................................................................................................ 550 A Serial Flash Loader .......................................................................................................... 554 A.1 Serial Flash Loader ................................................................................................................. 554 A.2 Interfaces ............................................................................................................................... 554 March 17, 2008 7 Preliminary LM3S8933 Microcontroller A.2.1 UART ..................................................................................................................................... 554 A.2.2 SSI ......................................................................................................................................... 554 A.3 Packet Handling ...................................................................................................................... 555 A.3.1 Packet Format ........................................................................................................................ 555 A.3.2 Sending Packets ..................................................................................................................... 555 A.3.3 Receiving Packets ................................................................................................................... 555 A.4 Commands ............................................................................................................................. 556 A.4.1 COMMAND_PING (0X20) ........................................................................................................ 556 A.4.2 COMMAND_GET_STATUS (0x23) ........................................................................................... 556 A.4.3 COMMAND_DOWNLOAD (0x21) ............................................................................................. 556 A.4.4 COMMAND_SEND_DATA (0x24) ............................................................................................. 557 A.4.5 COMMAND_RUN (0x22) ......................................................................................................... 557 A.4.6 COMMAND_RESET (0x25) ..................................................................................................... 557 B Register Quick Reference ............................................................................................... 559 C Ordering and Contact Information ................................................................................. 578 C.1 Ordering Information ................................................................................................................ 578 C.2 Kits ......................................................................................................................................... 578 C.3 Company Information .............................................................................................................. 579 C.4 Support Information ................................................................................................................. 579 8 March 17, 2008 Preliminary Table of Contents List of Figures Figure 1-1. Stellaris® 8000 Series High-Level Block Diagram ............................................................... 28 Figure 2-1. CPU Block Diagram ......................................................................................................... 36 Figure 2-2. TPIU Block Diagram ........................................................................................................ 37 Figure 5-1. JTAG Module Block Diagram ............................................................................................ 47 Figure 5-2. Test Access Port State Machine ....................................................................................... 50 Figure 5-3. IDCODE Register Format ................................................................................................. 55 Figure 5-4. BYPASS Register Format ................................................................................................ 56 Figure 5-5. Boundary Scan Register Format ....................................................................................... 56 Figure 6-1. External Circuitry to Extend Reset .................................................................................... 58 Figure 6-2. Main Clock Tree .............................................................................................................. 61 Figure 7-1. Hibernation Module Block Diagram ................................................................................. 120 Figure 8-1. Flash Block Diagram ...................................................................................................... 138 Figure 9-1. GPIO Port Block Diagram ............................................................................................... 163 Figure 9-2. GPIODATA Write Example ............................................................................................. 164 Figure 9-3. GPIODATA Read Example ............................................................................................. 164 Figure 10-1. GPTM Module Block Diagram ........................................................................................ 205 Figure 10-2. 16-Bit Input Edge Count Mode Example .......................................................................... 209 Figure 10-3. 16-Bit Input Edge Time Mode Example ........................................................................... 210 Figure 10-4. 16-Bit PWM Mode Example ............................................................................................ 211 Figure 11-1. WDT Module Block Diagram .......................................................................................... 240 Figure 12-1. ADC Module Block Diagram ........................................................................................... 264 Figure 12-2. Differential Sampling Range, Vin(-) = 1.5 V ...................................................................... 267 Figure 12-3. Differential Sampling Range, Vin(-) = 0.75 V .................................................................... 267 Figure 12-4. Differential Sampling Range, Vin(-) = 2.25 V .................................................................... 268 Figure 12-5. Internal Temperature Sensor Characteristic ..................................................................... 268 Figure 13-1. UART Module Block Diagram ......................................................................................... 297 Figure 13-2. UART Character Frame ................................................................................................. 298 Figure 13-3. IrDA Data Modulation ..................................................................................................... 300 Figure 14-1. SSI Module Block Diagram ............................................................................................. 337 Figure 14-2. TI Synchronous Serial Frame Format (Single Transfer) .................................................... 340 Figure 14-3. TI Synchronous Serial Frame Format (Continuous Transfer) ............................................ 340 Figure 14-4. Freescale SPI Format (Single Transfer) with SPO=0 and SPH=0 ...................................... 341 Figure 14-5. Freescale SPI Format (Continuous Transfer) with SPO=0 and SPH=0 .............................. 341 Figure 14-6. Freescale SPI Frame Format with SPO=0 and SPH=1 ..................................................... 342 Figure 14-7. Freescale SPI Frame Format (Single Transfer) with SPO=1 and SPH=0 ........................... 343 Figure 14-8. Freescale SPI Frame Format (Continuous Transfer) with SPO=1 and SPH=0 .................... 343 Figure 14-9. Freescale SPI Frame Format with SPO=1 and SPH=1 ..................................................... 344 Figure 14-10. MICROWIRE Frame Format (Single Frame) .................................................................... 345 Figure 14-11. MICROWIRE Frame Format (Continuous Transfer) ......................................................... 346 Figure 14-12. MICROWIRE Frame Format, SSIFss Input Setup and Hold Requirements ........................ 346 Figure 15-1. I2C Block Diagram ......................................................................................................... 374 Figure 15-2. I2C Bus Configuration .................................................................................................... 375 Figure 15-3. START and STOP Conditions ......................................................................................... 375 Figure 15-4. Complete Data Transfer with a 7-Bit Address ................................................................... 376 Figure 15-5. R/S Bit in First Byte ........................................................................................................ 376 March 17, 2008 9 Preliminary LM3S8933 Microcontroller Figure 15-6. Data Validity During Bit Transfer on the I2C Bus ............................................................... 376 Figure 15-7. Master Single SEND ...................................................................................................... 379 Figure 15-8. Master Single RECEIVE ................................................................................................. 380 Figure 15-9. Master Burst SEND ....................................................................................................... 381 Figure 15-10. Master Burst RECEIVE .................................................................................................. 382 Figure 15-11. Master Burst RECEIVE after Burst SEND ........................................................................ 383 Figure 15-12. Master Burst SEND after Burst RECEIVE ........................................................................ 384 Figure 15-13. Slave Command Sequence ............................................................................................ 385 Figure 16-1. CAN Module Block Diagram ........................................................................................... 410 Figure 16-2. CAN Bit Time ................................................................................................................ 417 Figure 17-1. Ethernet Controller Block Diagram .................................................................................. 450 Figure 17-2. Ethernet Controller ......................................................................................................... 450 Figure 17-3. Ethernet Frame ............................................................................................................. 452 Figure 18-1. Analog Comparator Module Block Diagram ..................................................................... 495 Figure 18-2. Structure of Comparator Unit .......................................................................................... 496 Figure 18-3. Comparator Internal Reference Structure ........................................................................ 497 Figure 19-1. 100-Pin LQFP Package Pin Diagram .............................................................................. 507 Figure 19-2. 108-Ball BGA Package Pin Diagram (Top View) ............................................................... 508 Figure 22-1. Load Conditions ............................................................................................................ 538 Figure 22-2. I2C Timing ..................................................................................................................... 541 Figure 22-3. External XTLP Oscillator Characteristics ......................................................................... 543 Figure 22-4. Hibernation Module Timing ............................................................................................. 544 Figure 22-5. SSI Timing for TI Frame Format (FRF=01), Single Transfer Timing Measurement .............. 545 Figure 22-6. SSI Timing for MICROWIRE Frame Format (FRF=10), Single Transfer ............................. 545 Figure 22-7. SSI Timing for SPI Frame Format (FRF=00), with SPH=1 ................................................. 546 Figure 22-8. JTAG Test Clock Input Timing ......................................................................................... 547 Figure 22-9. JTAG Test Access Port (TAP) Timing .............................................................................. 547 Figure 22-10. JTAG TRST Timing ........................................................................................................ 547 Figure 22-11. External Reset Timing (RST) .......................................................................................... 548 Figure 22-12. Power-On Reset Timing ................................................................................................. 549 Figure 22-13. Brown-Out Reset Timing ................................................................................................ 549 Figure 22-14. Software Reset Timing ................................................................................................... 549 Figure 22-15. Watchdog Reset Timing ................................................................................................. 549 Figure 23-1. 100-Pin LQFP Package .................................................................................................. 550 Figure 23-2. 100-Ball BGA Package .................................................................................................. 552 10 March 17, 2008 Preliminary Table of Contents List of Tables Table 1. Documentation Conventions ............................................................................................ 20 Table 3-1. Memory Map ................................................................................................................... 41 Table 4-1. Exception Types .............................................................................................................. 43 Table 4-2. Interrupts ........................................................................................................................ 44 Table 5-1. JTAG Port Pins Reset State ............................................................................................. 48 Table 5-2. JTAG Instruction Register Commands ............................................................................... 53 Table 6-1. System Control Register Map ........................................................................................... 64 Table 7-1. Hibernation Module Register Map ................................................................................... 124 Table 8-1. Flash Protection Policy Combinations ............................................................................. 140 Table 8-2. Flash Resident Registers ............................................................................................... 141 Table 8-3. Flash Register Map ........................................................................................................ 141 Table 9-1. GPIO Pad Configuration Examples ................................................................................. 166 Table 9-2. GPIO Interrupt Configuration Example ............................................................................ 166 Table 9-3. GPIO Register Map ....................................................................................................... 168 Table 10-1. Available CCP Pins ........................................................................................................ 205 Table 10-2. 16-Bit Timer With Prescaler Configurations ..................................................................... 208 Table 10-3. Timers Register Map ...................................................................................................... 214 Table 11-1. Watchdog Timer Register Map ........................................................................................ 241 Table 12-1. Samples and FIFO Depth of Sequencers ........................................................................ 264 Table 12-2. Differential Sampling Pairs ............................................................................................. 266 Table 12-3. ADC Register Map ......................................................................................................... 269 Table 13-1. UART Register Map ....................................................................................................... 302 Table 14-1. SSI Register Map .......................................................................................................... 347 Table 15-1. Examples of I2C Master Timer Period versus Speed Mode ............................................... 377 Table 15-2. Inter-Integrated Circuit (I2C) Interface Register Map ......................................................... 386 Table 15-3. Write Field Decoding for I2CMCS[3:0] Field (Sheet 1 of 3) ................................................ 391 Table 16-1. Transmit Message Object Bit Settings ............................................................................. 412 Table 16-2. Receive Message Object Bit Settings .............................................................................. 414 Table 16-3. CAN Protocol Ranges .................................................................................................... 417 Table 16-4. CAN Register Map ......................................................................................................... 420 Table 17-1. TX & RX FIFO Organization ........................................................................................... 453 Table 17-2. Ethernet Register Map ................................................................................................... 456 Table 18-1. Comparator 0 Operating Modes ..................................................................................... 496 Table 18-2. Comparator 1 Operating Modes ..................................................................................... 496 Table 18-3. Comparator 2 Operating Modes ...................................................................................... 497 Table 18-4. Internal Reference Voltage and ACREFCTL Field Values ................................................. 497 Table 18-5. Analog Comparators Register Map ................................................................................. 499 Table 20-1. Signals by Pin Number ................................................................................................... 509 Table 20-2. Signals by Signal Name ................................................................................................. 513 Table 20-3. Signals by Function, Except for GPIO ............................................................................. 517 Table 20-4. GPIO Pins and Alternate Functions ................................................................................. 519 Table 20-5. Signals by Pin Number ................................................................................................... 520 Table 20-6. Signals by Signal Name ................................................................................................. 525 Table 20-7. Signals by Function, Except for GPIO ............................................................................. 529 Table 20-8. GPIO Pins and Alternate Functions ................................................................................. 532 Table 21-1. Temperature Characteristics ........................................................................................... 534 March 17, 2008 11 Preliminary LM3S8933 Microcontroller Table 21-2. Thermal Characteristics ................................................................................................. 534 Table 22-1. Maximum Ratings .......................................................................................................... 535 Table 22-2. Recommended DC Operating Conditions ........................................................................ 535 Table 22-3. LDO Regulator Characteristics ....................................................................................... 536 Table 22-4. Detailed Power Specifications ........................................................................................ 537 Table 22-5. Flash Memory Characteristics ........................................................................................ 538 Table 22-6. Phase Locked Loop (PLL) Characteristics ....................................................................... 538 Table 22-7. Clock Characteristics ..................................................................................................... 538 Table 22-8. Crystal Characteristics ................................................................................................... 539 Table 22-9. ADC Characteristics ....................................................................................................... 539 Table 22-10. Analog Comparator Characteristics ................................................................................. 540 Table 22-11. Analog Comparator Voltage Reference Characteristics .................................................... 540 Table 22-12. I2C Characteristics ......................................................................................................... 540 Table 22-13. 100BASE-TX Transmitter Characteristics ........................................................................ 541 Table 22-14. 100BASE-TX Transmitter Characteristics (informative) ..................................................... 541 Table 22-15. 100BASE-TX Receiver Characteristics ............................................................................ 541 Table 22-16. 10BASE-T Transmitter Characteristics ............................................................................ 541 Table 22-17. 10BASE-T Transmitter Characteristics (informative) ......................................................... 542 Table 22-18. 10BASE-T Receiver Characteristics ................................................................................ 542 Table 22-19. Isolation Transformers ................................................................................................... 542 Table 22-20. Ethernet Reference Crystal ............................................................................................ 543 Table 22-21. External XTLP Oscillator Characteristics ......................................................................... 543 Table 22-22. Hibernation Module Characteristics ................................................................................. 544 Table 22-23. SSI Characteristics ........................................................................................................ 544 Table 22-24. JTAG Characteristics ..................................................................................................... 546 Table 22-25. GPIO Characteristics ..................................................................................................... 548 Table 22-26. Reset Characteristics ..................................................................................................... 548 Table C-1. Part Ordering Information ............................................................................................... 578 12 March 17, 2008 Preliminary Table of Contents List of Registers System Control .............................................................................................................................. 57 Register 1: Device Identification 0 (DID0), offset 0x000 ....................................................................... 66 Register 2: Brown-Out Reset Control (PBORCTL), offset 0x030 .......................................................... 68 Register 3: LDO Power Control (LDOPCTL), offset 0x034 ................................................................... 69 Register 4: Raw Interrupt Status (RIS), offset 0x050 ........................................................................... 70 Register 5: Interrupt Mask Control (IMC), offset 0x054 ........................................................................ 71 Register 6: Masked Interrupt Status and Clear (MISC), offset 0x058 .................................................... 72 Register 7: Reset Cause (RESC), offset 0x05C .................................................................................. 73 Register 8: Run-Mode Clock Configuration (RCC), offset 0x060 .......................................................... 74 Register 9: XTAL to PLL Translation (PLLCFG), offset 0x064 .............................................................. 78 Register 10: Run-Mode Clock Configuration 2 (RCC2), offset 0x070 ...................................................... 79 Register 11: Deep Sleep Clock Configuration (DSLPCLKCFG), offset 0x144 .......................................... 81 Register 12: Device Identification 1 (DID1), offset 0x004 ....................................................................... 82 Register 13: Device Capabilities 0 (DC0), offset 0x008 ......................................................................... 84 Register 14: Device Capabilities 1 (DC1), offset 0x010 ......................................................................... 85 Register 15: Device Capabilities 2 (DC2), offset 0x014 ......................................................................... 87 Register 16: Device Capabilities 3 (DC3), offset 0x018 ......................................................................... 89 Register 17: Device Capabilities 4 (DC4), offset 0x01C ......................................................................... 91 Register 18: Run Mode Clock Gating Control Register 0 (RCGC0), offset 0x100 .................................... 93 Register 19: Sleep Mode Clock Gating Control Register 0 (SCGC0), offset 0x110 .................................. 95 Register 20: Deep Sleep Mode Clock Gating Control Register 0 (DCGC0), offset 0x120 ......................... 97 Register 21: Run Mode Clock Gating Control Register 1 (RCGC1), offset 0x104 .................................... 99 Register 22: Sleep Mode Clock Gating Control Register 1 (SCGC1), offset 0x114 ................................. 102 Register 23: Deep Sleep Mode Clock Gating Control Register 1 (DCGC1), offset 0x124 ....................... 105 Register 24: Run Mode Clock Gating Control Register 2 (RCGC2), offset 0x108 ................................... 108 Register 25: Sleep Mode Clock Gating Control Register 2 (SCGC2), offset 0x118 ................................. 110 Register 26: Deep Sleep Mode Clock Gating Control Register 2 (DCGC2), offset 0x128 ....................... 112 Register 27: Software Reset Control 0 (SRCR0), offset 0x040 ............................................................. 114 Register 28: Software Reset Control 1 (SRCR1), offset 0x044 ............................................................. 115 Register 29: Software Reset Control 2 (SRCR2), offset 0x048 ............................................................. 117 Hibernation Module ..................................................................................................................... 119 Register 1: Hibernation RTC Counter (HIBRTCC), offset 0x000 ......................................................... 126 Register 2: Hibernation RTC Match 0 (HIBRTCM0), offset 0x004 ....................................................... 127 Register 3: Hibernation RTC Match 1 (HIBRTCM1), offset 0x008 ....................................................... 128 Register 4: Hibernation RTC Load (HIBRTCLD), offset 0x00C ........................................................... 129 Register 5: Hibernation Control (HIBCTL), offset 0x010 ..................................................................... 130 Register 6: Hibernation Interrupt Mask (HIBIM), offset 0x014 ............................................................. 132 Register 7: Hibernation Raw Interrupt Status (HIBRIS), offset 0x018 .................................................. 133 Register 8: Hibernation Masked Interrupt Status (HIBMIS), offset 0x01C ............................................ 134 Register 9: Hibernation Interrupt Clear (HIBIC), offset 0x020 ............................................................. 135 Register 10: Hibernation RTC Trim (HIBRTCT), offset 0x024 ............................................................... 136 Register 11: Hibernation Data (HIBDATA), offset 0x030-0x12C ............................................................ 137 Internal Memory ........................................................................................................................... 138 Register 1: Flash Memory Address (FMA), offset 0x000 .................................................................... 143 Register 2: Flash Memory Data (FMD), offset 0x004 ......................................................................... 144 March 17, 2008 13 Preliminary LM3S8933 Microcontroller Register 3: Flash Memory Control (FMC), offset 0x008 ..................................................................... 145 Register 4: Flash Controller Raw Interrupt Status (FCRIS), offset 0x00C ............................................ 147 Register 5: Flash Controller Interrupt Mask (FCIM), offset 0x010 ........................................................ 148 Register 6: Flash Controller Masked Interrupt Status and Clear (FCMISC), offset 0x014 ..................... 149 Register 7: USec Reload (USECRL), offset 0x140 ............................................................................ 150 Register 8: Flash Memory Protection Read Enable 0 (FMPRE0), offset 0x130 and 0x200 ................... 151 Register 9: Flash Memory Protection Program Enable 0 (FMPPE0), offset 0x134 and 0x400 ............... 152 Register 10: User Debug (USER_DBG), offset 0x1D0 ......................................................................... 153 Register 11: User Register 0 (USER_REG0), offset 0x1E0 .................................................................. 154 Register 12: User Register 1 (USER_REG1), offset 0x1E4 .................................................................. 155 Register 13: Flash Memory Protection Read Enable 1 (FMPRE1), offset 0x204 .................................... 156 Register 14: Flash Memory Protection Read Enable 2 (FMPRE2), offset 0x208 .................................... 157 Register 15: Flash Memory Protection Read Enable 3 (FMPRE3), offset 0x20C ................................... 158 Register 16: Flash Memory Protection Program Enable 1 (FMPPE1), offset 0x404 ............................... 159 Register 17: Flash Memory Protection Program Enable 2 (FMPPE2), offset 0x408 ............................... 160 Register 18: Flash Memory Protection Program Enable 3 (FMPPE3), offset 0x40C ............................... 161 General-Purpose Input/Outputs (GPIOs) ................................................................................... 162 Register 1: GPIO Data (GPIODATA), offset 0x000 ............................................................................ 170 Register 2: GPIO Direction (GPIODIR), offset 0x400 ......................................................................... 171 Register 3: GPIO Interrupt Sense (GPIOIS), offset 0x404 .................................................................. 172 Register 4: GPIO Interrupt Both Edges (GPIOIBE), offset 0x408 ........................................................ 173 Register 5: GPIO Interrupt Event (GPIOIEV), offset 0x40C ................................................................ 174 Register 6: GPIO Interrupt Mask (GPIOIM), offset 0x410 ................................................................... 175 Register 7: GPIO Raw Interrupt Status (GPIORIS), offset 0x414 ........................................................ 176 Register 8: GPIO Masked Interrupt Status (GPIOMIS), offset 0x418 ................................................... 177 Register 9: GPIO Interrupt Clear (GPIOICR), offset 0x41C ................................................................ 178 Register 10: GPIO Alternate Function Select (GPIOAFSEL), offset 0x420 ............................................ 179 Register 11: GPIO 2-mA Drive Select (GPIODR2R), offset 0x500 ........................................................ 181 Register 12: GPIO 4-mA Drive Select (GPIODR4R), offset 0x504 ........................................................ 182 Register 13: GPIO 8-mA Drive Select (GPIODR8R), offset 0x508 ........................................................ 183 Register 14: GPIO Open Drain Select (GPIOODR), offset 0x50C ......................................................... 184 Register 15: GPIO Pull-Up Select (GPIOPUR), offset 0x510 ................................................................ 185 Register 16: GPIO Pull-Down Select (GPIOPDR), offset 0x514 ........................................................... 186 Register 17: GPIO Slew Rate Control Select (GPIOSLR), offset 0x518 ................................................ 187 Register 18: GPIO Digital Enable (GPIODEN), offset 0x51C ................................................................ 188 Register 19: GPIO Lock (GPIOLOCK), offset 0x520 ............................................................................ 189 Register 20: GPIO Commit (GPIOCR), offset 0x524 ............................................................................ 190 Register 21: GPIO Peripheral Identification 4 (GPIOPeriphID4), offset 0xFD0 ....................................... 192 Register 22: GPIO Peripheral Identification 5 (GPIOPeriphID5), offset 0xFD4 ....................................... 193 Register 23: GPIO Peripheral Identification 6 (GPIOPeriphID6), offset 0xFD8 ....................................... 194 Register 24: GPIO Peripheral Identification 7 (GPIOPeriphID7), offset 0xFDC ...................................... 195 Register 25: GPIO Peripheral Identification 0 (GPIOPeriphID0), offset 0xFE0 ....................................... 196 Register 26: GPIO Peripheral Identification 1 (GPIOPeriphID1), offset 0xFE4 ....................................... 197 Register 27: GPIO Peripheral Identification 2 (GPIOPeriphID2), offset 0xFE8 ....................................... 198 Register 28: GPIO Peripheral Identification 3 (GPIOPeriphID3), offset 0xFEC ...................................... 199 Register 29: GPIO PrimeCell Identification 0 (GPIOPCellID0), offset 0xFF0 .......................................... 200 Register 30: GPIO PrimeCell Identification 1 (GPIOPCellID1), offset 0xFF4 .......................................... 201 Register 31: GPIO PrimeCell Identification 2 (GPIOPCellID2), offset 0xFF8 .......................................... 202 14 March 17, 2008 Preliminary Table of Contents Register 32: GPIO PrimeCell Identification 3 (GPIOPCellID3), offset 0xFFC ......................................... 203 General-Purpose Timers ............................................................................................................. 204 Register 1: GPTM Configuration (GPTMCFG), offset 0x000 .............................................................. 216 Register 2: GPTM TimerA Mode (GPTMTAMR), offset 0x004 ............................................................ 217 Register 3: GPTM TimerB Mode (GPTMTBMR), offset 0x008 ............................................................ 219 Register 4: GPTM Control (GPTMCTL), offset 0x00C ........................................................................ 221 Register 5: GPTM Interrupt Mask (GPTMIMR), offset 0x018 .............................................................. 224 Register 6: GPTM Raw Interrupt Status (GPTMRIS), offset 0x01C ..................................................... 226 Register 7: GPTM Masked Interrupt Status (GPTMMIS), offset 0x020 ................................................ 227 Register 8: GPTM Interrupt Clear (GPTMICR), offset 0x024 .............................................................. 228 Register 9: GPTM TimerA Interval Load (GPTMTAILR), offset 0x028 ................................................. 230 Register 10: GPTM TimerB Interval Load (GPTMTBILR), offset 0x02C ................................................ 231 Register 11: GPTM TimerA Match (GPTMTAMATCHR), offset 0x030 ................................................... 232 Register 12: GPTM TimerB Match (GPTMTBMATCHR), offset 0x034 .................................................. 233 Register 13: GPTM TimerA Prescale (GPTMTAPR), offset 0x038 ........................................................ 234 Register 14: GPTM TimerB Prescale (GPTMTBPR), offset 0x03C ....................................................... 235 Register 15: GPTM TimerA Prescale Match (GPTMTAPMR), offset 0x040 ........................................... 236 Register 16: GPTM TimerB Prescale Match (GPTMTBPMR), offset 0x044 ........................................... 237 Register 17: GPTM TimerA (GPTMTAR), offset 0x048 ........................................................................ 238 Register 18: GPTM TimerB (GPTMTBR), offset 0x04C ....................................................................... 239 Watchdog Timer ........................................................................................................................... 240 Register 1: Watchdog Load (WDTLOAD), offset 0x000 ...................................................................... 243 Register 2: Watchdog Value (WDTVALUE), offset 0x004 ................................................................... 244 Register 3: Watchdog Control (WDTCTL), offset 0x008 ..................................................................... 245 Register 4: Watchdog Interrupt Clear (WDTICR), offset 0x00C .......................................................... 246 Register 5: Watchdog Raw Interrupt Status (WDTRIS), offset 0x010 .................................................. 247 Register 6: Watchdog Masked Interrupt Status (WDTMIS), offset 0x014 ............................................. 248 Register 7: Watchdog Test (WDTTEST), offset 0x418 ....................................................................... 249 Register 8: Watchdog Lock (WDTLOCK), offset 0xC00 ..................................................................... 250 Register 9: Watchdog Peripheral Identification 4 (WDTPeriphID4), offset 0xFD0 ................................. 251 Register 10: Watchdog Peripheral Identification 5 (WDTPeriphID5), offset 0xFD4 ................................. 252 Register 11: Watchdog Peripheral Identification 6 (WDTPeriphID6), offset 0xFD8 ................................. 253 Register 12: Watchdog Peripheral Identification 7 (WDTPeriphID7), offset 0xFDC ................................ 254 Register 13: Watchdog Peripheral Identification 0 (WDTPeriphID0), offset 0xFE0 ................................. 255 Register 14: Watchdog Peripheral Identification 1 (WDTPeriphID1), offset 0xFE4 ................................. 256 Register 15: Watchdog Peripheral Identification 2 (WDTPeriphID2), offset 0xFE8 ................................. 257 Register 16: Watchdog Peripheral Identification 3 (WDTPeriphID3), offset 0xFEC ................................. 258 Register 17: Watchdog PrimeCell Identification 0 (WDTPCellID0), offset 0xFF0 .................................... 259 Register 18: Watchdog PrimeCell Identification 1 (WDTPCellID1), offset 0xFF4 .................................... 260 Register 19: Watchdog PrimeCell Identification 2 (WDTPCellID2), offset 0xFF8 .................................... 261 Register 20: Watchdog PrimeCell Identification 3 (WDTPCellID3 ), offset 0xFFC .................................. 262 Analog-to-Digital Converter (ADC) ............................................................................................. 263 Register 1: ADC Active Sample Sequencer (ADCACTSS), offset 0x000 ............................................. 271 Register 2: ADC Raw Interrupt Status (ADCRIS), offset 0x004 ........................................................... 272 Register 3: ADC Interrupt Mask (ADCIM), offset 0x008 ..................................................................... 273 Register 4: ADC Interrupt Status and Clear (ADCISC), offset 0x00C .................................................. 274 Register 5: ADC Overflow Status (ADCOSTAT), offset 0x010 ............................................................ 275 Register 6: ADC Event Multiplexer Select (ADCEMUX), offset 0x014 ................................................. 276 March 17, 2008 15 Preliminary LM3S8933 Microcontroller Register 7: ADC Underflow Status (ADCUSTAT), offset 0x018 ........................................................... 279 Register 8: ADC Sample Sequencer Priority (ADCSSPRI), offset 0x020 ............................................. 280 Register 9: ADC Processor Sample Sequence Initiate (ADCPSSI), offset 0x028 ................................. 281 Register 10: ADC Sample Averaging Control (ADCSAC), offset 0x030 ................................................. 282 Register 11: ADC Sample Sequence Input Multiplexer Select 0 (ADCSSMUX0), offset 0x040 ............... 283 Register 12: ADC Sample Sequence Control 0 (ADCSSCTL0), offset 0x044 ........................................ 285 Register 13: ADC Sample Sequence Result FIFO 0 (ADCSSFIFO0), offset 0x048 ................................ 288 Register 14: ADC Sample Sequence Result FIFO 1 (ADCSSFIFO1), offset 0x068 ................................ 288 Register 15: ADC Sample Sequence Result FIFO 2 (ADCSSFIFO2), offset 0x088 ................................ 288 Register 16: ADC Sample Sequence Result FIFO 3 (ADCSSFIFO3), offset 0x0A8 ............................... 288 Register 17: ADC Sample Sequence FIFO 0 Status (ADCSSFSTAT0), offset 0x04C ............................. 289 Register 18: ADC Sample Sequence FIFO 1 Status (ADCSSFSTAT1), offset 0x06C ............................. 289 Register 19: ADC Sample Sequence FIFO 2 Status (ADCSSFSTAT2), offset 0x08C ............................ 289 Register 20: ADC Sample Sequence FIFO 3 Status (ADCSSFSTAT3), offset 0x0AC ............................ 289 Register 21: ADC Sample Sequence Input Multiplexer Select 1 (ADCSSMUX1), offset 0x060 ............... 290 Register 22: ADC Sample Sequence Input Multiplexer Select 2 (ADCSSMUX2), offset 0x080 ............... 290 Register 23: ADC Sample Sequence Control 1 (ADCSSCTL1), offset 0x064 ........................................ 291 Register 24: ADC Sample Sequence Control 2 (ADCSSCTL2), offset 0x084 ........................................ 291 Register 25: ADC Sample Sequence Input Multiplexer Select 3 (ADCSSMUX3), offset 0x0A0 ............... 293 Register 26: ADC Sample Sequence Control 3 (ADCSSCTL3), offset 0x0A4 ........................................ 294 Register 27: ADC Test Mode Loopback (ADCTMLB), offset 0x100 ....................................................... 295 Universal Asynchronous Receivers/Transmitters (UARTs) ..................................................... 296 Register 1: UART Data (UARTDR), offset 0x000 ............................................................................... 304 Register 2: UART Receive Status/Error Clear (UARTRSR/UARTECR), offset 0x004 ........................... 306 Register 3: UART Flag (UARTFR), offset 0x018 ................................................................................ 308 Register 4: UART IrDA Low-Power Register (UARTILPR), offset 0x020 ............................................. 310 Register 5: UART Integer Baud-Rate Divisor (UARTIBRD), offset 0x024 ............................................ 311 Register 6: UART Fractional Baud-Rate Divisor (UARTFBRD), offset 0x028 ....................................... 312 Register 7: UART Line Control (UARTLCRH), offset 0x02C ............................................................... 313 Register 8: UART Control (UARTCTL), offset 0x030 ......................................................................... 315 Register 9: UART Interrupt FIFO Level Select (UARTIFLS), offset 0x034 ........................................... 317 Register 10: UART Interrupt Mask (UARTIM), offset 0x038 ................................................................. 319 Register 11: UART Raw Interrupt Status (UARTRIS), offset 0x03C ...................................................... 321 Register 12: UART Masked Interrupt Status (UARTMIS), offset 0x040 ................................................. 322 Register 13: UART Interrupt Clear (UARTICR), offset 0x044 ............................................................... 323 Register 14: UART Peripheral Identification 4 (UARTPeriphID4), offset 0xFD0 ..................................... 325 Register 15: UART Peripheral Identification 5 (UARTPeriphID5), offset 0xFD4 ..................................... 326 Register 16: UART Peripheral Identification 6 (UARTPeriphID6), offset 0xFD8 ..................................... 327 Register 17: UART Peripheral Identification 7 (UARTPeriphID7), offset 0xFDC ..................................... 328 Register 18: UART Peripheral Identification 0 (UARTPeriphID0), offset 0xFE0 ...................................... 329 Register 19: UART Peripheral Identification 1 (UARTPeriphID1), offset 0xFE4 ...................................... 330 Register 20: UART Peripheral Identification 2 (UARTPeriphID2), offset 0xFE8 ...................................... 331 Register 21: UART Peripheral Identification 3 (UARTPeriphID3), offset 0xFEC ..................................... 332 Register 22: UART PrimeCell Identification 0 (UARTPCellID0), offset 0xFF0 ........................................ 333 Register 23: UART PrimeCell Identification 1 (UARTPCellID1), offset 0xFF4 ........................................ 334 Register 24: UART PrimeCell Identification 2 (UARTPCellID2), offset 0xFF8 ........................................ 335 Register 25: UART PrimeCell Identification 3 (UARTPCellID3), offset 0xFFC ........................................ 336 16 March 17, 2008 Preliminary Table of Contents Synchronous Serial Interface (SSI) ............................................................................................ 337 Register 1: SSI Control 0 (SSICR0), offset 0x000 .............................................................................. 349 Register 2: SSI Control 1 (SSICR1), offset 0x004 .............................................................................. 351 Register 3: SSI Data (SSIDR), offset 0x008 ...................................................................................... 353 Register 4: SSI Status (SSISR), offset 0x00C ................................................................................... 354 Register 5: SSI Clock Prescale (SSICPSR), offset 0x010 .................................................................. 356 Register 6: SSI Interrupt Mask (SSIIM), offset 0x014 ......................................................................... 357 Register 7: SSI Raw Interrupt Status (SSIRIS), offset 0x018 .............................................................. 359 Register 8: SSI Masked Interrupt Status (SSIMIS), offset 0x01C ........................................................ 360 Register 9: SSI Interrupt Clear (SSIICR), offset 0x020 ....................................................................... 361 Register 10: SSI Peripheral Identification 4 (SSIPeriphID4), offset 0xFD0 ............................................. 362 Register 11: SSI Peripheral Identification 5 (SSIPeriphID5), offset 0xFD4 ............................................. 363 Register 12: SSI Peripheral Identification 6 (SSIPeriphID6), offset 0xFD8 ............................................. 364 Register 13: SSI Peripheral Identification 7 (SSIPeriphID7), offset 0xFDC ............................................ 365 Register 14: SSI Peripheral Identification 0 (SSIPeriphID0), offset 0xFE0 ............................................. 366 Register 15: SSI Peripheral Identification 1 (SSIPeriphID1), offset 0xFE4 ............................................. 367 Register 16: SSI Peripheral Identification 2 (SSIPeriphID2), offset 0xFE8 ............................................. 368 Register 17: SSI Peripheral Identification 3 (SSIPeriphID3), offset 0xFEC ............................................ 369 Register 18: SSI PrimeCell Identification 0 (SSIPCellID0), offset 0xFF0 ............................................... 370 Register 19: SSI PrimeCell Identification 1 (SSIPCellID1), offset 0xFF4 ............................................... 371 Register 20: SSI PrimeCell Identification 2 (SSIPCellID2), offset 0xFF8 ............................................... 372 Register 21: SSI PrimeCell Identification 3 (SSIPCellID3), offset 0xFFC ............................................... 373 Inter-Integrated Circuit (I2C) Interface ........................................................................................ 374 Register 1: I2C Master Slave Address (I2CMSA), offset 0x000 ........................................................... 388 Register 2: I2C Master Control/Status (I2CMCS), offset 0x004 ........................................................... 389 Register 3: I2C Master Data (I2CMDR), offset 0x008 ......................................................................... 393 Register 4: I2C Master Timer Period (I2CMTPR), offset 0x00C ........................................................... 394 Register 5: I2C Master Interrupt Mask (I2CMIMR), offset 0x010 ......................................................... 395 Register 6: I2C Master Raw Interrupt Status (I2CMRIS), offset 0x014 ................................................. 396 Register 7: I2C Master Masked Interrupt Status (I2CMMIS), offset 0x018 ........................................... 397 Register 8: I2C Master Interrupt Clear (I2CMICR), offset 0x01C ......................................................... 398 Register 9: I2C Master Configuration (I2CMCR), offset 0x020 ............................................................ 399 Register 10: I2C Slave Own Address (I2CSOAR), offset 0x000 ............................................................ 401 Register 11: I2C Slave Control/Status (I2CSCSR), offset 0x004 ........................................................... 402 Register 12: I2C Slave Data (I2CSDR), offset 0x008 ........................................................................... 404 Register 13: I2C Slave Interrupt Mask (I2CSIMR), offset 0x00C ........................................................... 405 Register 14: I2C Slave Raw Interrupt Status (I2CSRIS), offset 0x010 ................................................... 406 Register 15: I2C Slave Masked Interrupt Status (I2CSMIS), offset 0x014 .............................................. 407 Register 16: I2C Slave Interrupt Clear (I2CSICR), offset 0x018 ............................................................ 408 Controller Area Network (CAN) Module ..................................................................................... 409 Register 1: CAN Control (CANCTL), offset 0x000 ............................................................................. 422 Register 2: CAN Status (CANSTS), offset 0x004 ............................................................................... 424 Register 3: CAN Error Counter (CANERR), offset 0x008 ................................................................... 427 Register 4: CAN Bit Timing (CANBIT), offset 0x00C .......................................................................... 428 Register 5: CAN Interrupt (CANINT), offset 0x010 ............................................................................. 430 Register 6: CAN Test (CANTST), offset 0x014 .................................................................................. 431 Register 7: CAN Baud Rate Prescalar Extension (CANBRPE), offset 0x018 ....................................... 433 March 17, 2008 17 Preliminary LM3S8933 Microcontroller Register 8: CAN IF1 Command Request (CANIF1CRQ), offset 0x020 ................................................ 434 Register 9: CAN IF2 Command Request (CANIF2CRQ), offset 0x080 ................................................ 434 Register 10: CAN IF1 Command Mask (CANIF1CMSK), offset 0x024 .................................................. 435 Register 11: CAN IF2 Command Mask (CANIF2CMSK), offset 0x084 .................................................. 435 Register 12: CAN IF1 Mask 1 (CANIF1MSK1), offset 0x028 ................................................................ 438 Register 13: CAN IF2 Mask 1 (CANIF2MSK1), offset 0x088 ................................................................ 438 Register 14: CAN IF1 Mask 2 (CANIF1MSK2), offset 0x02C ................................................................ 439 Register 15: CAN IF2 Mask 2 (CANIF2MSK2), offset 0x08C ................................................................ 439 Register 16: CAN IF1 Arbitration 1 (CANIF1ARB1), offset 0x030 ......................................................... 440 Register 17: CAN IF2 Arbitration 1 (CANIF2ARB1), offset 0x090 ......................................................... 440 Register 18: CAN IF1 Arbitration 2 (CANIF1ARB2), offset 0x034 ......................................................... 441 Register 19: CAN IF2 Arbitration 2 (CANIF2ARB2), offset 0x094 ......................................................... 441 Register 20: CAN IF1 Message Control (CANIF1MCTL), offset 0x038 .................................................. 442 Register 21: CAN IF2 Message Control (CANIF2MCTL), offset 0x098 .................................................. 442 Register 22: CAN IF1 Data A1 (CANIF1DA1), offset 0x03C ................................................................. 444 Register 23: CAN IF1 Data A2 (CANIF1DA2), offset 0x040 ................................................................. 444 Register 24: CAN IF1 Data B1 (CANIF1DB1), offset 0x044 ................................................................. 444 Register 25: CAN IF1 Data B2 (CANIF1DB2), offset 0x048 ................................................................. 444 Register 26: CAN IF2 Data A1 (CANIF2DA1), offset 0x09C ................................................................. 444 Register 27: CAN IF2 Data A2 (CANIF2DA2), offset 0x0A0 ................................................................. 444 Register 28: CAN IF2 Data B1 (CANIF2DB1), offset 0x0A4 ................................................................. 444 Register 29: CAN IF2 Data B2 (CANIF2DB2), offset 0x0A8 ................................................................. 444 Register 30: CAN Transmission Request 1 (CANTXRQ1), offset 0x100 ................................................ 445 Register 31: CAN Transmission Request 2 (CANTXRQ2), offset 0x104 ................................................ 445 Register 32: CAN New Data 1 (CANNWDA1), offset 0x120 ................................................................. 446 Register 33: CAN New Data 2 (CANNWDA2), offset 0x124 ................................................................. 446 Register 34: CAN Message 1 Interrupt Pending (CANMSG1INT), offset 0x140 ..................................... 447 Register 35: CAN Message 2 Interrupt Pending (CANMSG2INT), offset 0x144 ..................................... 447 Register 36: CAN Message 1 Valid (CANMSG1VAL), offset 0x160 ....................................................... 448 Register 37: CAN Message 2 Valid (CANMSG2VAL), offset 0x164 ....................................................... 448 Ethernet Controller ...................................................................................................................... 449 Register 1: Ethernet MAC Raw Interrupt Status (MACRIS), offset 0x000 ............................................ 458 Register 2: Ethernet MAC Interrupt Acknowledge (MACIACK), offset 0x000 ....................................... 460 Register 3: Ethernet MAC Interrupt Mask (MACIM), offset 0x004 ....................................................... 461 Register 4: Ethernet MAC Receive Control (MACRCTL), offset 0x008 ................................................ 462 Register 5: Ethernet MAC Transmit Control (MACTCTL), offset 0x00C ............................................... 463 Register 6: Ethernet MAC Data (MACDATA), offset 0x010 ................................................................. 464 Register 7: Ethernet MAC Individual Address 0 (MACIA0), offset 0x014 ............................................. 466 Register 8: Ethernet MAC Individual Address 1 (MACIA1), offset 0x018 ............................................. 467 Register 9: Ethernet MAC Threshold (MACTHR), offset 0x01C .......................................................... 468 Register 10: Ethernet MAC Management Control (MACMCTL), offset 0x020 ........................................ 469 Register 11: Ethernet MAC Management Divider (MACMDV), offset 0x024 .......................................... 470 Register 12: Ethernet MAC Management Transmit Data (MACMTXD), offset 0x02C ............................. 471 Register 13: Ethernet MAC Management Receive Data (MACMRXD), offset 0x030 .............................. 472 Register 14: Ethernet MAC Number of Packets (MACNP), offset 0x034 ............................................... 473 Register 15: Ethernet MAC Transmission Request (MACTR), offset 0x038 ........................................... 474 Register 16: Ethernet MAC Timer Support (MACTS), offset 0x03C ...................................................... 475 Register 17: Ethernet PHY Management Register 0 – Control (MR0), address 0x00 ............................. 476 18 March 17, 2008 Preliminary Table of Contents Register 18: Ethernet PHY Management Register 1 – Status (MR1), address 0x01 .............................. 478 Register 19: Ethernet PHY Management Register 2 – PHY Identifier 1 (MR2), address 0x02 ................. 480 Register 20: Ethernet PHY Management Register 3 – PHY Identifier 2 (MR3), address 0x03 ................. 481 Register 21: Ethernet PHY Management Register 4 – Auto-Negotiation Advertisement (MR4), address 0x04 ............................................................................................................................. 482 Register 22: Ethernet PHY Management Register 5 – Auto-Negotiation Link Partner Base Page Ability (MR5), address 0x05 ..................................................................................................... 484 Register 23: Ethernet PHY Management Register 6 – Auto-Negotiation Expansion (MR6), address 0x06 ............................................................................................................................. 485 Register 24: Ethernet PHY Management Register 16 – Vendor-Specific (MR16), address 0x10 ............. 486 Register 25: Ethernet PHY Management Register 17 – Interrupt Control/Status (MR17), address 0x11 .............................................................................................................................. 488 Register 26: Ethernet PHY Management Register 18 – Diagnostic (MR18), address 0x12 ..................... 490 Register 27: Ethernet PHY Management Register 19 – Transceiver Control (MR19), address 0x13 ....... 491 Register 28: Ethernet PHY Management Register 23 – LED Configuration (MR23), address 0x17 ......... 492 Register 29: Ethernet PHY Management Register 24 –MDI/MDIX Control (MR24), address 0x18 .......... 493 Analog Comparators ................................................................................................................... 494 Register 1: Analog Comparator Masked Interrupt Status (ACMIS), offset 0x00 .................................... 500 Register 2: Analog Comparator Raw Interrupt Status (ACRIS), offset 0x04 ......................................... 501 Register 3: Analog Comparator Interrupt Enable (ACINTEN), offset 0x08 ........................................... 502 Register 4: Analog Comparator Reference Voltage Control (ACREFCTL), offset 0x10 ......................... 503 Register 5: Analog Comparator Status 0 (ACSTAT0), offset 0x20 ....................................................... 504 Register 6: Analog Comparator Status 1 (ACSTAT1), offset 0x40 ....................................................... 504 Register 7: Analog Comparator Status 2 (ACSTAT2), offset 0x60 ....................................................... 504 Register 8: Analog Comparator Control 0 (ACCTL0), offset 0x24 ....................................................... 505 Register 9: Analog Comparator Control 1 (ACCTL1), offset 0x44 ....................................................... 505 Register 10: Analog Comparator Control 2 (ACCTL2), offset 0x64 ...................................................... 505 March 17, 2008 19 Preliminary LM3S8933 Microcontroller About This Document This data sheet provides reference information for the LM3S8933 microcontroller, describing the functional blocks of the system-on-chip (SoC) device designed around the ARM® Cortex™-M3 core. Audience This manual is intended for system software developers, hardware designers, and application developers. About This Manual This document is organized into sections that correspond to each major feature. Related Documents The following documents are referenced by the data sheet, and available on the documentation CD or from the Luminary Micro web site at www.luminarymicro.com: ■ ARM® Cortex™-M3 Technical Reference Manual ■ ARM® CoreSight Technical Reference Manual ■ ARM® v7-M Architecture Application Level Reference Manual The following related documents are also referenced: ■ IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture This documentation list was current as of publication date. Please check the Luminary Micro web site for additional documentation, including application notes and white papers. Documentation Conventions This document uses the conventions shown in Table 1 on page 20. Table 1. Documentation Conventions Notation Meaning General Register Notation APB registers are indicated in uppercase bold. For example, PBORCTL is the Power-On and Brown-Out Reset Control register. If a register name contains a lowercase n, it represents more than one register. For example, SRCRn represents any (or all) of the three Software Reset Control registers: SRCR0, SRCR1 , and SRCR2. REGISTER bit A single bit in a register. bit field Two or more consecutive and related bits. A hexadecimal increment to a register's address, relative to that module's base address as specified in “Memory Map” on page 41. offset 0xnnn Registers are numbered consecutively throughout the document to aid in referencing them. The register number has no meaning to software. Register N 20 March 17, 2008 Preliminary About This Document Notation Meaning Register bits marked reserved are reserved for future use. In most cases, reserved bits are set to 0; however, user software should not rely on the value of a reserved bit. To provide software compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. reserved The range of register bits inclusive from xx to yy. For example, 31:15 means bits 15 through 31 in that register. yy:xx This value in the register bit diagram indicates whether software running on the controller can change the value of the bit field. Register Bit/Field Types RC Software can read this field. The bit or field is cleared by hardware after reading the bit/field. RO Software can read this field. Always write the chip reset value. R/W Software can read or write this field. Software can read or write this field. A write of a 0 to a W1C bit does not affect the bit value in the register. A write of a 1 clears the value of the bit in the register; the remaining bits remain unchanged. This register type is primarily used for clearing interrupt status bits where the read operation provides the interrupt status and the write of the read value clears only the interrupts being reported at the time the register was read. R/W1C Software can read or write a 1 to this field. A write of a 0 to a R/W1S bit does not affect the bit value in the register. R/W1S Software can write this field. A write of a 0 to a W1C bit does not affect the bit value in the register. A write of a 1 clears the value of the bit in the register; the remaining bits remain unchanged. A read of the register returns no meaningful data. This register is typically used to clear the corresponding bit in an interrupt register. W1C WO Only a write by software is valid; a read of the register returns no meaningful data. Register Bit/Field This value in the register bit diagram shows the bit/field value after any reset, unless noted. Reset Value 0 Bit cleared to 0 on chip reset. 1 Bit set to 1 on chip reset. - Nondeterministic. Pin/Signal Notation [ ] Pin alternate function; a pin defaults to the signal without the brackets. pin Refers to the physical connection on the package. signal Refers to the electrical signal encoding of a pin. Change the value of the signal from the logically False state to the logically True state. For active High signals, the asserted signal value is 1 (High); for active Low signals, the asserted signal value is 0 (Low). The active polarity (High or Low) is defined by the signal name (see SIGNAL and SIGNAL below). assert a signal deassert a signal Change the value of the signal from the logically True state to the logically False state. Signal names are in uppercase and in the Courier font. An overbar on a signal name indicates that it is active Low. To assert SIGNAL is to drive it Low; to deassert SIGNAL is to drive it High. SIGNAL Signal names are in uppercase and in the Courier font. An active High signal has no overbar. To assert SIGNAL is to drive it High; to deassert SIGNAL is to drive it Low. SIGNAL Numbers An uppercase X indicates any of several values is allowed, where X can be any legal pattern. For example, a binary value of 0X00 can be either 0100 or 0000, a hex value of 0xX is 0x0 or 0x1, and so on. X Hexadecimal numbers have a prefix of 0x. For example, 0x00FF is the hexadecimal number FF. All other numbers within register tables are assumed to be binary. Within conceptual information, binary numbers are indicated with a b suffix, for example, 1011b, and decimal numbers are written without a prefix or suffix. 0x March 17, 2008 21 Preliminary LM3S8933 Microcontroller 1 Architectural Overview The Luminary Micro Stellaris® family of microcontrollers—the first ARM® Cortex™-M3 based controllers—brings high-performance 32-bit computing to cost-sensitive embedded microcontroller applications. These pioneering parts deliver customers 32-bit performance at a cost equivalent to legacy 8- and 16-bit devices, all in a package with a small footprint. The Stellaris® family offers efficient performance and extensive integration, favorably positioning the device into cost-conscious applications requiring significant control-processing and connectivity capabilities. The Stellaris® LM3S8000 series combines Bosch Controller Area Network technology with both a 10/100 Ethernet Media Access Control (MAC) and Physical (PHY) layer. The LM3S8933 microcontroller is targeted for industrial applications, including remote monitoring, electronic point-of-sale machines, test and measurement equipment, network appliances and switches, factory automation, HVAC and building control, gaming equipment, motion control, medical instrumentation, and fire and security. For applications requiring extreme conservation of power, the LM3S8933 microcontroller features a Battery-backed Hibernation module to efficiently power down the LM3S8933 to a low-power state during extended periods of inactivity. With a power-up/power-down sequencer, a continuous time counter (RTC), a pair of match registers, an APB interface to the system bus, and dedicated non-volatile memory, the Hibernation module positions the LM3S8933 microcontroller perfectly for battery applications. In addition, the LM3S8933 microcontroller offers the advantages of ARM's widely available development tools, System-on-Chip (SoC) infrastructure IP applications, and a large user community. Additionally, the microcontroller uses ARM's Thumb®-compatible Thumb-2 instruction set to reduce memory requirements and, thereby, cost. Finally, the LM3S8933 microcontroller is code-compatible to all members of the extensive Stellaris® family; providing flexibility to fit our customers' precise needs. Luminary Micro offers a complete solution to get to market quickly, with evaluation and development boards, white papers and application notes, an easy-to-use peripheral driver library, and a strong support, sales, and distributor network. See “Ordering and Contact Information” on page 578 for ordering information for Stellaris® family devices. 1.1 Product Features The LM3S8933 microcontroller includes the following product features: ■ 32-Bit RISC Performance – 32-bit ARM® Cortex™-M3 v7M architecture optimized for small-footprint embedded applications – System timer (SysTick), providing a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism – Thumb®-compatible Thumb-2-only instruction set processor core for high code density – 50-MHz operation – Hardware-division and single-cycle-multiplication 22 March 17, 2008 Preliminary Architectural Overview – Integrated Nested Vectored Interrupt Controller (NVIC) providing deterministic interrupt handling – 32 interrupts with eight priority levels – Memory protection unit (MPU), providing a privileged mode for protected operating system functionality – Unaligned data access, enabling data to be efficiently packed into memory – Atomic bit manipulation (bit-banding), delivering maximum memory utilization and streamlined peripheral control ■ Internal Memory – 256 KB single-cycle flash • User-managed flash block protection on a 2-KB block basis • User-managed flash data programming • User-defined and managed flash-protection block – 64 KB single-cycle SRAM ■ General-Purpose Timers – Four General-Purpose Timer Modules (GPTM), each of which provides two 16-bit timers. Each GPTM can be configured to operate independently: • As a single 32-bit timer • As one 32-bit Real-Time Clock (RTC) to event capture • For Pulse Width Modulation (PWM) • To trigger analog-to-digital conversions – 32-bit Timer modes • Programmable one-shot timer • Programmable periodic timer • Real-Time Clock when using an external 32.768-KHz clock as the input • User-enabled stalling in periodic and one-shot mode when the controller asserts the CPU Halt flag during debug • ADC event trigger – 16-bit Timer modes • General-purpose timer function with an 8-bit prescaler • Programmable one-shot timer March 17, 2008 23 Preliminary LM3S8933 Microcontroller • Programmable periodic timer • User-enabled stalling when the controller asserts CPU Halt flag during debug • ADC event trigger – 16-bit Input Capture modes • Input edge count capture • Input edge time capture – 16-bit PWM mode • Simple PWM mode with software-programmable output inversion of the PWM signal ■ ARM FiRM-compliant Watchdog Timer – 32-bit down counter with a programmable load register – Separate watchdog clock with an enable – Programmable interrupt generation logic with interrupt masking – Lock register protection from runaway software – Reset generation logic with an enable/disable – User-enabled stalling when the controller asserts the CPU Halt flag during debug ■ Controller Area Network (CAN) – Supports CAN protocol version 2.0 part A/B – Bit rates up to 1Mb/s – 32 message objects, each with its own identifier mask – Maskable interrupt – Disable automatic retransmission mode for TTCAN – Programmable loop-back mode for self-test operation ■ 10/100 Ethernet Controller – Conforms to the IEEE 802.3-2002 Specification – Hardware assistance for IEEE 1588-2002 Precision Time Protocol (PTP) – Full- and half-duplex for both 100 Mbps and 10 Mbps operation – Integrated 10/100 Mbps Transceiver (PHY) – Automatic MDI/MDI-X cross-over correction – Programmable MAC address 24 March 17, 2008 Preliminary Architectural Overview – Power-saving and power-down modes ■ Synchronous Serial Interface (SSI) – Master or slave operation – Programmable clock bit rate and prescale – Separate transmit and receive FIFOs, 16 bits wide, 8 locations deep – Programmable interface operation for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces – Programmable data frame size from 4 to 16 bits – Internal loopback test mode for diagnostic/debug testing ■ UART – Two fully programmable 16C550-type UARTs with IrDA support – Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs to reduce CPU interrupt service loading – Programmable baud-rate generator allowing speeds up to 3.125 Mbps – Programmable FIFO length, including 1-byte deep operation providing conventional double-buffered interface – FIFO trigger levels of 1/8, 1/4, 1/2, 3/4, and 7/8 – Standard asynchronous communication bits for start, stop, and parity – False-start-bit detection – Line-break generation and detection ■ ADC – Single- and differential-input configurations – Four 10-bit channels (inputs) when used as single-ended inputs – Sample rate of one million samples/second – Flexible, configurable analog-to-digital conversion – Four programmable sample conversion sequences from one to eight entries long, with corresponding conversion result FIFOs – Each sequence triggered by software or internal event (timers, analog comparators, or GPIO) – On-chip temperature sensor ■ Analog Comparators – Three independent integrated analog comparators March 17, 2008 25 Preliminary LM3S8933 Microcontroller – Configurable for output to: drive an output pin, generate an interrupt, or initiate an ADC sample sequence – Compare external pin input to external pin input or to internal programmable voltage reference ■ I2C – Master and slave receive and transmit operation with transmission speed up to 100 Kbps in Standard mode and 400 Kbps in Fast mode – Interrupt generation – Master with arbitration and clock synchronization, multimaster support, and 7-bit addressing mode ■ GPIOs – 6-36 GPIOs, depending on configuration – 5-V-tolerant input/outputs – Programmable interrupt generation as either edge-triggered or level-sensitive – Bit masking in both read and write operations through address lines – Can initiate an ADC sample sequence – Programmable control for GPIO pad configuration: • Weak pull-up or pull-down resistors • 2-mA, 4-mA, and 8-mA pad drive • Slew rate control for the 8-mA drive • Open drain enables • Digital input enables ■ Power – On-chip Low Drop-Out (LDO) voltage regulator, with programmable output user-adjustable from 2.25 V to 2.75 V – Hibernation module handles the power-up/down 3.3 V sequencing and control for the core digital logic and analog circuits – Low-power options on controller: Sleep and Deep-sleep modes – Low-power options for peripherals: software controls shutdown of individual peripherals – User-enabled LDO unregulated voltage detection and automatic reset – 3.3-V supply brown-out detection and reporting via interrupt or reset ■ Flexible Reset Sources 26 March 17, 2008 Preliminary Architectural Overview – Power-on reset (POR) – Reset pin assertion – Brown-out (BOR) detector alerts to system power drops – Software reset – Watchdog timer reset – Internal low drop-out (LDO) regulator output goes unregulated ■ Additional Features – Six reset sources – Programmable clock source control – Clock gating to individual peripherals for power savings – IEEE 1149.1-1990 compliant Test Access Port (TAP) controller – Debug access via JTAG and Serial Wire interfaces – Full JTAG boundary scan ■ Industrial and extended temperature 100-pin RoHS-compliant LQFP package ■ Industrial-range 108-ball RoHS-compliant BGA package 1.2 Target Applications ■ Remote monitoring ■ Electronic point-of-sale (POS) machines ■ Test and measurement equipment ■ Network appliances and switches ■ Factory automation ■ HVAC and building control ■ Gaming equipment ■ Motion control ■ Medical instrumentation ■ Fire and security ■ Power and energy ■ Transportation March 17, 2008 27 Preliminary LM3S8933 Microcontroller 1.3 High-Level Block Diagram Figure 1-1 on page 28 represents the full set of features in the Stellaris® 8000 series of devices; not all features may be available on the LM3S8933 microcontroller. Figure 1-1. Stellaris® 8000 Series High-Level Block Diagram 1.4 Functional Overview The following sections provide an overview of the features of the LM3S8933 microcontroller. The page number in parenthesis indicates where that feature is discussed in detail. Ordering and support information can be found in “Ordering and Contact Information” on page 578. 28 March 17, 2008 Preliminary Architectural Overview 1.4.1 ARM Cortex™-M3 1.4.1.1 Processor Core (see page 35) All members of the Stellaris® product family, including the LM3S8933 microcontroller, are designed around an ARM Cortex™-M3 processor core. The ARM Cortex-M3 processor provides the core for a high-performance, low-cost platform that meets the needs of minimal memory implementation, reduced pin count, and low-power consumption, while delivering outstanding computational performance and exceptional system response to interrupts. “ARM Cortex-M3 Processor Core” on page 35 provides an overview of the ARM core; the core is detailed in the ARM® Cortex™-M3 Technical Reference Manual. 1.4.1.2 System Timer (SysTick) Cortex-M3 includes an integrated system timer, SysTick. SysTick provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism. The counter can be used in several different ways, for example: ■ An RTOS tick timer which fires at a programmable rate (for example, 100 Hz) and invokes a SysTick routine. ■ A high-speed alarm timer using the system clock. ■ A variable rate alarm or signal timer—the duration is range-dependent on the reference clock used and the dynamic range of the counter. ■ A simple counter. Software can use this to measure time to completion and time used. ■ An internal clock source control based on missing/meeting durations. The COUNTFLAG bit-field in the control and status register can be used to determine if an action completed within a set duration, as part of a dynamic clock management control loop. 1.4.1.3 Nested Vectored Interrupt Controller (NVIC) The LM3S8933 controller includes the ARM Nested Vectored Interrupt Controller (NVIC) on the ARM Cortex-M3 core. The NVIC and Cortex-M3 prioritize and handle all exceptions. All exceptions are handled in Handler Mode. The processor state is automatically stored to the stack on an exception, and automatically restored from the stack at the end of the Interrupt Service Routine (ISR). The vector is fetched in parallel to the state saving, which enables efficient interrupt entry. The processor supports tail-chaining, which enables back-to-back interrupts to be performed without the overhead of state saving and restoration. Software can set eight priority levels on 7 exceptions (system handlers) and 32 interrupts. “Interrupts” on page 43 provides an overview of the NVIC controller and the interrupt map. Exceptions and interrupts are detailed in the ARM® Cortex™-M3 Technical Reference Manual. 1.4.2 Motor Control Peripherals To enhance motor control, the LM3S8933 controller features Pulse Width Modulation (PWM) outputs. 1.4.2.1 PWM Pulse width modulation (PWM) is a powerful technique for digitally encoding analog signal levels. High-resolution counters are used to generate a square wave, and the duty cycle of the square wave is modulated to encode an analog signal. Typical applications include switching power supplies and motor control. March 17, 2008 29 Preliminary LM3S8933 Microcontroller On the LM3S8933, PWM motion control functionality can be achieved through: ■ The motion control features of the general-purpose timers using the CCP pins CCP Pins (see page 210) The General-Purpose Timer Module's CCP (Capture Compare PWM) pins are software programmable to support a simple PWM mode with a software-programmable output inversion of the PWM signal. 1.4.3 Analog Peripherals To handle analog signals, the LM3S8933 microcontroller offers an Analog-to-Digital Converter (ADC). For support of analog signals, the LM3S8933 microcontroller offers three analog comparators. 1.4.3.1 ADC (see page 263) An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a discrete digital number. The LM3S8933 ADC module features 10-bit conversion resolution and supports four input channels, plus an internal temperature sensor. Four buffered sample sequences allow rapid sampling of up to eight analog input sources without controller intervention. Each sample sequence provides flexible programming with fully configurable input source, trigger events, interrupt generation, and sequence priority. 1.4.3.2 Analog Comparators (see page 494) An analog comparator is a peripheral that compares two analog voltages, and provides a logical output that signals the comparison result. The LM3S8933 microcontroller provides three independent integrated analog comparators that can be configured to drive an output or generate an interrupt or ADC event. A comparator can compare a test voltage against any one of these voltages: ■ An individual external reference voltage ■ A shared single external reference voltage ■ A shared internal reference voltage The comparator can provide its output to a device pin, acting as a replacement for an analog comparator on the board, or it can be used to signal the application via interrupts or triggers to the ADC to cause it to start capturing a sample sequence. The interrupt generation and ADC triggering logic is separate. This means, for example, that an interrupt can be generated on a rising edge and the ADC triggered on a falling edge. 1.4.4 Serial Communications Peripherals The LM3S8933 controller supports both asynchronous and synchronous serial communications with: ■ Two fully programmable 16C550-type UARTs ■ One SSI module ■ One I2C module 30 March 17, 2008 Preliminary Architectural Overview ■ One CAN unit ■ Ethernet controller 1.4.4.1 UART (see page 296) A Universal Asynchronous Receiver/Transmitter (UART) is an integrated circuit used for RS-232C serial communications, containing a transmitter (parallel-to-serial converter) and a receiver (serial-to-parallel converter), each clocked separately. The LM3S8933 controller includes two fully programmable 16C550-type UARTs that support data transfer speeds up to 3.125 Mbps. (Although similar in functionality to a 16C550 UART, it is not register-compatible.) In addition, each UART is capable of supporting IrDA. Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs reduce CPU interrupt service loading. The UART can generate individually masked interrupts from the RX, TX, modem status, and error conditions. The module provides a single combined interrupt when any of the interrupts are asserted and are unmasked. 1.4.4.2 SSI (see page 337) Synchronous Serial Interface (SSI) is a four-wire bi-directional communications interface. The LM3S8933 controller includes one SSI module that provides the functionality for synchronous serial communications with peripheral devices, and can be configured to use the Freescale SPI, MICROWIRE, or TI synchronous serial interface frame formats. The size of the data frame is also configurable, and can be set between 4 and 16 bits, inclusive. The SSI module performs serial-to-parallel conversion on data received from a peripheral device, and parallel-to-serial conversion on data transmitted to a peripheral device. The TX and RX paths are buffered with internal FIFOs, allowing up to eight 16-bit values to be stored independently. The SSI module can be configured as either a master or slave device. As a slave device, the SSI module can also be configured to disable its output, which allows a master device to be coupled with multiple slave devices. The SSI module also includes a programmable bit rate clock divider and prescaler to generate the output serial clock derived from the SSI module's input clock. Bit rates are generated based on the input clock and the maximum bit rate is determined by the connected peripheral. 1.4.4.3 I2C (see page 374) The Inter-Integrated Circuit (I2C) bus provides bi-directional data transfer through a two-wire design (a serial data line SDA and a serial clock line SCL). The I2C bus interfaces to external I2C devices such as serial memory (RAMs and ROMs), networking devices, LCDs, tone generators, and so on. The I2C bus may also be used for system testing and diagnostic purposes in product development and manufacture. The LM3S8933 controller includes one I2C module that provides the ability to communicate to other IC devices over an I2C bus. The I2C bus supports devices that can both transmit and receive (write and read) data. Devices on the I2C bus can be designated as either a master or a slave. The I2C module supports both sending and receiving data as either a master or a slave, and also supports the simultaneous operation as both a master and a slave. The four I2C modes are: Master Transmit, Master Receive, Slave Transmit, and Slave Receive. A Stellaris® I2C module can operate at two speeds: Standard (100 Kbps) and Fast (400 Kbps). March 17, 2008 31 Preliminary LM3S8933 Microcontroller Both the I2C master and slave can generate interrupts. The I2C master generates interrupts when a transmit or receive operation completes (or aborts due to an error). The I2C slave generates interrupts when data has been sent or requested by a master. 1.4.4.4 Controller Area Network (see page 409) Controller Area Network (CAN) is a multicast shared serial-bus standard for connecting electronic control units (ECUs). CAN was specifically designed to be robust in electromagnetically noisy environments and can utilize a differential balanced line like RS-485 or a more robust twisted-pair wire. Originally created for automotive purposes, now it is used in many embedded control applications (for example, industrial or medical). Bit rates up to 1Mb/s are possible at network lengths below 40 meters. Decreased bit rates allow longer network distances (for example, 125 Kb/s at 500m). A transmitter sends a message to all CAN nodes (broadcasting). Each node decides on the basis of the identifier received whether it should process the message. The identifier also determines the priority that the message enjoys in competition for bus access. Each CAN message can transmit from 0 to 8 bytes of user information. The LM3S8933 includes one CAN units. 1.4.4.5 Ethernet Controller (see page 449) Ethernet is a frame-based computer networking technology for local area networks (LANs). Ethernet has been standardized as IEEE 802.3. It defines a number of wiring and signaling standards for the physical layer, two means of network access at the Media Access Control (MAC)/Data Link Layer, and a common addressing format. The Stellaris® Ethernet Controller consists of a fully integrated media access controller (MAC) and network physical (PHY) interface device. The Ethernet Controller conforms to IEEE 802.3 specifications and fully supports 10BASE-T and 100BASE-TX standards. In addition, the Ethernet Controller supports automatic MDI/MDI-X cross-over correction. 1.4.5 System Peripherals 1.4.5.1 Programmable GPIOs (see page 162) General-purpose input/output (GPIO) pins offer flexibility for a variety of connections. The Stellaris® GPIO module is comprised of seven physical GPIO blocks, each corresponding to an individual GPIO port. The GPIO module is FiRM-compliant (compliant to the ARM Foundation IP for Real-Time Microcontrollers specification) and supports 6-36 programmable input/output pins. The number of GPIOs available depends on the peripherals being used (see “Signal Tables” on page 509 for the signals available to each GPIO pin). The GPIO module features programmable interrupt generation as either edge-triggered or level-sensitive on all pins, programmable control for GPIO pad configuration, and bit masking in both read and write operations through address lines. 1.4.5.2 Four Programmable Timers (see page 204) Programmable timers can be used to count or time external events that drive the Timer input pins. The Stellaris® General-Purpose Timer Module (GPTM) contains four GPTM blocks. Each GPTM block provides two 16-bit timers/counters that can be configured to operate independently as timers or event counters, or configured to operate as one 32-bit timer or one 32-bit Real-Time Clock (RTC). Timers can also be used to trigger analog-to-digital (ADC) conversions. When configured in 32-bit mode, a timer can run as a Real-Time Clock (RTC), one-shot timer or periodic timer. When in 16-bit mode, a timer can run as a one-shot timer or periodic timer, and can 32 March 17, 2008 Preliminary Architectural Overview extend its precision by using an 8-bit prescaler. A 16-bit timer can also be configured for event capture or Pulse Width Modulation (PWM) generation. 1.4.5.3 Watchdog Timer (see page 240) A watchdog timer can generate nonmaskable interrupts (NMIs) or a reset when a time-out value is reached. The watchdog timer is used to regain control when a system has failed due to a software error or to the failure of an external device to respond in the expected way. The Stellaris® Watchdog Timer module consists of a 32-bit down counter, a programmable load register, interrupt generation logic, and a locking register. The Watchdog Timer can be configured to generate an interrupt to the controller on its first time-out, and to generate a reset signal on its second time-out. Once the Watchdog Timer has been configured, the lock register can be written to prevent the timer configuration from being inadvertently altered. 1.4.6 Memory Peripherals The LM3S8933 controller offers both single-cycle SRAM and single-cycle Flash memory. 1.4.6.1 SRAM (see page 138) The LM3S8933 static random access memory (SRAM) controller supports 64 KB SRAM. The internal SRAM of the Stellaris® devices is located at offset 0x0000.0000 of the device memory map. To reduce the number of time-consuming read-modify-write (RMW) operations, ARM has introduced bit-banding technology in the new Cortex-M3 processor. With a bit-band-enabled processor, certain regions in the memory map (SRAM and peripheral space) can use address aliases to access individual bits in a single, atomic operation. 1.4.6.2 Flash (see page 139) The LM3S8933 Flash controller supports 256 KB of flash memory. The flash is organized as a set of 1-KB blocks that can be individually erased. Erasing a block causes the entire contents of the block to be reset to all 1s. These blocks are paired into a set of 2-KB blocks that can be individually protected. The blocks can be marked as read-only or execute-only, providing different levels of code protection. Read-only blocks cannot be erased or programmed, protecting the contents of those blocks from being modified. Execute-only blocks cannot be erased or programmed, and can only be read by the controller instruction fetch mechanism, protecting the contents of those blocks from being read by either the controller or by a debugger. 1.4.7 Additional Features 1.4.7.1 Memory Map (see page 41) A memory map lists the location of instructions and data in memory. The memory map for the LM3S8933 controller can be found in “Memory Map” on page 41. Register addresses are given as a hexadecimal increment, relative to the module's base address as shown in the memory map. The ARM® Cortex™-M3 Technical Reference Manual provides further information on the memory map. 1.4.7.2 JTAG TAP Controller (see page 46) The Joint Test Action Group (JTAG) port is an IEEE standard that defines a Test Access Port and Boundary Scan Architecture for digital integrated circuits and provides a standardized serial interface for controlling the associated test logic. The TAP, Instruction Register (IR), and Data Registers (DR) can be used to test the interconnections of assembled printed circuit boards and obtain manufacturing March 17, 2008 33 Preliminary LM3S8933 Microcontroller information on the components. The JTAG Port also provides a means of accessing and controlling design-for-test features such as I/O pin observation and control, scan testing, and debugging. The JTAG port is composed of the standard five pins: TRST, TCK, TMS, TDI, and TDO. Data is transmitted serially into the controller on TDI and out of the controller on TDO. The interpretation of this data is dependent on the current state of the TAP controller. For detailed information on the operation of the JTAG port and TAP controller, please refer to the IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture. The Luminary Micro JTAG controller works with the ARM JTAG controller built into the Cortex-M3 core. This is implemented by multiplexing the TDO outputs from both JTAG controllers. ARM JTAG instructions select the ARM TDO output while Luminary Micro JTAG instructions select the Luminary Micro TDO outputs. The multiplexer is controlled by the Luminary Micro JTAG controller, which has comprehensive programming for the ARM, Luminary Micro, and unimplemented JTAG instructions. 1.4.7.3 System Control and Clocks (see page 57) System control determines the overall operation of the device. It provides information about the device, controls the clocking of the device and individual peripherals, and handles reset detection and reporting. 1.4.7.4 Hibernation Module (see page 119) The Hibernation module provides logic to switch power off to the main processor and peripherals, and to wake on external or time-based events. The Hibernation module includes power-sequencing logic, a real-time clock with a pair of match registers, low-battery detection circuitry, and interrupt signalling to the processor. It also includes 64 32-bit words of non-volatile memory that can be used for saving state during hibernation. 1.4.8 Hardware Details Details on the pins and package can be found in the following sections: ■ “Pin Diagram” on page 507 ■ “Signal Tables” on page 509 ■ “Operating Characteristics” on page 534 ■ “Electrical Characteristics” on page 535 ■ “Package Information” on page 550 34 March 17, 2008 Preliminary Architectural Overview 2 ARM Cortex-M3 Processor Core The ARM Cortex-M3 processor provides the core for a high-performance, low-cost platform that meets the needs of minimal memory implementation, reduced pin count, and low power consumption, while delivering outstanding computational performance and exceptional system response to interrupts. Features include: ■ Compact core. ■ Thumb-2 instruction set, delivering the high-performance expected of an ARM core in the memory size usually associated with 8- and 16-bit devices; typically in the range of a few kilobytes of memory for microcontroller class applications. ■ Rapid application execution through Harvard architecture characterized by separate buses for instruction and data. ■ Exceptional interrupt handling, by implementing the register manipulations required for handling an interrupt in hardware. ■ Deterministic, fast interrupt processing: always 12 cycles, or just 6 cycles with tail-chaining ■ Memory protection unit (MPU) to provide a privileged mode of operation for complex applications. ■ Migration from the ARM7™ processor family for better performance and power efficiency. ■ Full-featured debug solution with a: – Serial Wire JTAG Debug Port (SWJ-DP) – Flash Patch and Breakpoint (FPB) unit for implementing breakpoints – Data Watchpoint and Trigger (DWT) unit for implementing watchpoints, trigger resources, and system profiling – Instrumentation Trace Macrocell (ITM) for support of printf style debugging – Trace Port Interface Unit (TPIU) for bridging to a Trace Port Analyzer ■ Optimized for single-cycle flash usage ■ Three sleep modes with clock gating for low power ■ Single-cycle multiply instruction and hardware divide ■ Atomic operations ■ ARM Thumb2 mixed 16-/32-bit instruction set ■ 1.25 DMIPS/MHz The Stellaris® family of microcontrollers builds on this core to bring high-performance 32-bit computing to cost-sensitive embedded microcontroller applications, such as factory automation and control, industrial control power devices, building and home automation, and stepper motors. March 17, 2008 35 Preliminary LM3S8933 Microcontroller For more information on the ARM Cortex-M3 processor core, see the ARM® Cortex™-M3 Technical Reference Manual. For information on SWJ-DP, see the ARM® CoreSight Technical Reference Manual. 2.1 Block Diagram Figure 2-1. CPU Block Diagram Private Peripheral Bus (internal) Data Watchpoint and Trace Interrupts Debug Sleep Instrumentation Trace Macrocell Trace Port Interface Unit CM3 Core Instructions Data Flash Patch and Breakpoint Memory Protection Unit Adv. High- Perf. Bus Access Port Nested Vectored Interrupt Controller Serial Wire JTAG Debug Port Bus Matrix Adv. Peripheral Bus I-code bus D-code bus System bus ROM Table Private Peripheral Bus (external) Serial Wire Output Trace Port (SWO) ARM Cortex-M3 2.2 Functional Description Important: The ARM® Cortex™-M3 Technical Reference Manual describes all the features of an ARM Cortex-M3 in detail. However, these features differ based on the implementation. This section describes the Stellaris® implementation. Luminary Micro has implemented the ARM Cortex-M3 core as shown in Figure 2-1 on page 36. As noted in the ARM® Cortex™-M3 Technical Reference Manual, several Cortex-M3 components are flexible in their implementation: SW/JTAG-DP, ETM, TPIU, the ROM table, the MPU, and the Nested Vectored Interrupt Controller (NVIC). Each of these is addressed in the sections that follow. 2.2.1 Serial Wire and JTAG Debug Luminary Micro has replaced the ARM SW-DP and JTAG-DP with the ARM CoreSight™-compliant Serial Wire JTAG Debug Port (SWJ-DP) interface. This means Chapter 12, “Debug Port,” of the ARM® Cortex™-M3 Technical Reference Manual does not apply to Stellaris® devices. 36 March 17, 2008 Preliminary ARM Cortex-M3 Processor Core The SWJ-DP interface combines the SWD and JTAG debug ports into one module. See the CoreSight™ Design Kit Technical Reference Manual for details on SWJ-DP. 2.2.2 Embedded Trace Macrocell (ETM) ETM was not implemented in the Stellaris® devices. This means Chapters 15 and 16 of the ARM® Cortex™-M3 Technical Reference Manual can be ignored. 2.2.3 Trace Port Interface Unit (TPIU) The TPIU acts as a bridge between the Cortex-M3 trace data from the ITM, and an off-chip Trace Port Analyzer. The Stellaris® devices have implemented TPIU as shown in Figure 2-2 on page 37. This is similar to the non-ETM version described in the ARM® Cortex™-M3 Technical Reference Manual, however, SWJ-DP only provides SWV output for the TPIU. Figure 2-2. TPIU Block Diagram ATB Interface Asynchronous FIFO APB Interface Trace Out (serializer) Debug ATB Slave Port APB Slave Port Serial Wire Trace Port (SWO) 2.2.4 ROM Table The default ROM table was implemented as described in the ARM® Cortex™-M3 Technical Reference Manual. 2.2.5 Memory Protection Unit (MPU) The Memory Protection Unit (MPU) is included on the LM3S8933 controller and supports the standard ARMv7 Protected Memory System Architecture (PMSA) model. The MPU provides full support for protection regions, overlapping protection regions, access permissions, and exporting memory attributes to the system. 2.2.6 Nested Vectored Interrupt Controller (NVIC) The Nested Vectored Interrupt Controller (NVIC): ■ Facilitates low-latency exception and interrupt handling March 17, 2008 37 Preliminary LM3S8933 Microcontroller ■ Controls power management ■ Implements system control registers The NVIC supports up to 240 dynamically reprioritizable interrupts each with up to 256 levels of priority. The NVIC and the processor core interface are closely coupled, which enables low latency interrupt processing and efficient processing of late arriving interrupts. The NVIC maintains knowledge of the stacked (nested) interrupts to enable tail-chaining of interrupts. You can only fully access the NVIC from privileged mode, but you can pend interrupts in user-mode if you enable the Configuration Control Register (see the ARM® Cortex™-M3 Technical Reference Manual). Any other user-mode access causes a bus fault. All NVIC registers are accessible using byte, halfword, and word unless otherwise stated. 2.2.6.1 Interrupts The ARM® Cortex™-M3 Technical Reference Manual describes the maximum number of interrupts and interrupt priorities. The LM3S8933 microcontroller supports 32 interrupts with eight priority levels. 2.2.6.2 System Timer (SysTick) Cortex-M3 includes an integrated system timer, SysTick. SysTick provides a simple, 24-bit clear-on-write, decrementing, wrap-on-zero counter with a flexible control mechanism. The counter can be used in several different ways, for example: ■ An RTOS tick timer which fires at a programmable rate (for example, 100 Hz) and invokes a SysTick routine. ■ A high-speed alarm timer using the system clock. ■ A variable rate alarm or signal timer—the duration is range-dependent on the reference clock used and the dynamic range of the counter. ■ A simple counter. Software can use this to measure time to completion and time used. ■ An internal clock source control based on missing/meeting durations. The COUNTFLAG bit-field in the control and status register can be used to determine if an action completed within a set duration, as part of a dynamic clock management control loop. Functional Description The timer consists of three registers: ■ A control and status counter to configure its clock, enable the counter, enable the SysTick interrupt, and determine counter status. ■ The reload value for the counter, used to provide the counter's wrap value. ■ The current value of the counter. A fourth register, the SysTick Calibration Value Register, is not implemented in the Stellaris® devices. When enabled, the timer counts down from the reload value to zero, reloads (wraps) to the value in the SysTick Reload Value register on the next clock edge, then decrements on subsequent clocks. Writing a value of zero to the Reload Value register disables the counter on the next wrap. When the counter reaches zero, the COUNTFLAG status bit is set. The COUNTFLAG bit clears on reads. 38 March 17, 2008 Preliminary ARM Cortex-M3 Processor Core Writing to the Current Value register clears the register and the COUNTFLAG status bit. The write does not trigger the SysTick exception logic. On a read, the current value is the value of the register at the time the register is accessed. If the core is in debug state (halted), the counter will not decrement. The timer is clocked with respect to a reference clock. The reference clock can be the core clock or an external clock source. SysTick Control and Status Register Use the SysTick Control and Status Register to enable the SysTick features. The reset is 0x0000.0000. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:17 reserved RO 0 Count Flag Returns 1 if timer counted to 0 since last time this was read. Clears on read by application. If read by the debugger using the DAP, this bit is cleared on read-only if the MasterType bit in the AHB-AP Control Register is set to 0. Otherwise, the COUNTFLAG bit is not changed by the debugger read. 16 COUNTFLAG R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:3 reserved RO 0 Clock Source Value Description 0 External reference clock. (Not implemented for Stellaris microcontrollers.) 1 Core clock If no reference clock is provided, it is held at 1 and so gives the same time as the core clock. The core clock must be at least 2.5 times faster than the reference clock. If it is not, the count values are unpredictable. 2 CLKSOURCE R/W 0 Tick Int Value Description Counting down to 0 does not pend the SysTick handler. Software can use the COUNTFLAG to determine if ever counted to 0. 0 1 Counting down to 0 pends the SysTick handler. 1 TICKINT R/W 0 Enable Value Description 0 Counter disabled. Counter operates in a multi-shot way. That is, counter loads with the Reload value and then begins counting down. On reaching 0, it sets the COUNTFLAG to 1 and optionally pends the SysTick handler, based on TICKINT. It then loads the Reload value again, and begins counting. 1 0 ENABLE R/W 0 SysTick Reload Value Register Use the SysTick Reload Value Register to specify the start value to load into the current value register when the counter reaches 0. It can be any value between 1 and 0x00FF.FFFF. A start value March 17, 2008 39 Preliminary LM3S8933 Microcontroller of 0 is possible, but has no effect because the SysTick interrupt and COUNTFLAG are activated when counting from 1 to 0. Therefore, as a multi-shot timer, repeated over and over, it fires every N+1 clock pulse, where N is any value from 1 to 0x00FF.FFFF. So, if the tick interrupt is required every 100 clock pulses, 99 must be written into the RELOAD. If a new value is written on each tick interrupt, so treated as single shot, then the actual count down must be written. For example, if a tick is next required after 400 clock pulses, 400 must be written into the RELOAD. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:24 reserved RO 0 Reload Value to load into the SysTick Current Value Register when the counter reaches 0. 23:0 RELOAD W1C - SysTick Current Value Register Use the SysTick Current Value Register to find the current value in the register. Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:24 reserved RO 0 Current Value Current value at the time the register is accessed. No read-modify-write protection is provided, so change with care. This register is write-clear. Writing to it with any value clears the register to 0. Clearing this register also clears the COUNTFLAG bit of the SysTick Control and Status Register. 23:0 CURRENT W1C - SysTick Calibration Value Register The SysTick Calibration Value register is not implemented. 40 March 17, 2008 Preliminary ARM Cortex-M3 Processor Core 3 Memory Map The memory map for the LM3S8933 controller is provided in Table 3-1 on page 41. In this manual, register addresses are given as a hexadecimal increment, relative to the module’s base address as shown in the memory map. See also Chapter 4, “Memory Map” in the ARM® Cortex™-M3 Technical Reference Manual. Important: In Table 3-1 on page 41, addresses not listed are reserved. Table 3-1. Memory Mapa For details on registers, see page ... Start End Description Memory 0x0000.0000 0x0003.FFFF On-chip flash b 142 0x0004.0000 0x00FF.FFFF Reserved - 0x0100.0000 0x1FFF.FFFF Reserved - 0x2000.0000 0x2000.FFFF Bit-banded on-chip SRAMc 142 0x2001.0000 0x200F.FFFF Reserved - 0x2010.0000 0x21FF.FFFF Reserved - 0x2200.0000 0x221F.FFFF Bit-band alias of 0x2000.0000 through 0x200F.FFFF 138 0x2220.0000 0x3FFF.FFFF Reserved - FiRM Peripherals 0x4000.0000 0x4000.0FFF Watchdog timer 242 0x4000.1000 0x4000.3FFF Reserved - 0x4000.4000 0x4000.4FFF GPIO Port A 169 0x4000.5000 0x4000.5FFF GPIO Port B 169 0x4000.6000 0x4000.6FFF GPIO Port C 169 0x4000.7000 0x4000.7FFF GPIO Port D 169 0x4000.8000 0x4000.8FFF SSI0 348 0x4000.A000 0x4000.BFFF Reserved - 0x4000.C000 0x4000.CFFF UART0 303 0x4000.D000 0x4000.DFFF UART1 303 0x4000.F000 0x4000.FFFF Reserved - 0x4001.0000 0x4001.FFFF Reserved - Peripherals 0x4002.0000 0x4002.07FF I2C Master 0 387 0x4002.0800 0x4002.0FFF I2C Slave 0 400 0x4002.2000 0x4002.3FFF Reserved - 0x4002.4000 0x4002.4FFF GPIO Port E 169 0x4002.5000 0x4002.5FFF GPIO Port F 169 0x4002.6000 0x4002.6FFF GPIO Port G 169 0x4002.9000 0x4002.BFFF Reserved - 0x4002.E000 0x4002.FFFF Reserved - March 17, 2008 41 Preliminary LM3S8933 Microcontroller For details on registers, see page ... Start End Description 0x4003.0000 0x4003.0FFF Timer0 215 0x4003.1000 0x4003.1FFF Timer1 215 0x4003.2000 0x4003.2FFF Timer2 215 0x4003.3000 0x4003.3FFF Timer3 215 0x4003.4000 0x4003.7FFF Reserved - 0x4003.8000 0x4003.8FFF ADC 270 0x4003.9000 0x4003.BFFF Reserved - 0x4003.C000 0x4003.CFFF Analog Comparators 494 0x4003.D000 0x4003.FFFF Reserved - 0x4004.0000 0x4004.0FFF CAN0 Controller 421 0x4004.3000 0x4004.7FFF Reserved - 0x4004.8000 0x4004.8FFF Ethernet Controller 457 0x4004.9000 0x4004.BFFF Reserved - 0x4004.C000 0x4004.FFFF Reserved - 0x4005.1000 0x4005.3FFF Reserved - 0x4005.4000 0x4005.7FFF Reserved - 0x4006.0000 0x400F.BFFF Reserved - 0x400F.C000 0x400F.CFFF Hibernation Module 125 0x400F.D000 0x400F.DFFF Flash control 142 0x400F.E000 0x400F.EFFF System control 65 0x4010.0000 0x41FF.FFFF Reserved - 0x4200.0000 0x43FF.FFFF Bit-banded alias of 0x4000.0000 through 0x400F.FFFF - 0x4400.0000 0x5FFF.FFFF Reserved - 0x6000.0000 0xDFFF.FFFF Reserved - Private Peripheral Bus ARM® Cortex™-M3 Technical Reference Manual 0xE000.0000 0xE000.0FFF Instrumentation Trace Macrocell (ITM) 0xE000.1000 0xE000.1FFF Data Watchpoint and Trace (DWT) 0xE000.2000 0xE000.2FFF Flash Patch and Breakpoint (FPB) 0xE000.3000 0xE000.DFFF Reserved 0xE000.E000 0xE000.EFFF Nested Vectored Interrupt Controller (NVIC) 0xE000.F000 0xE003.FFFF Reserved 0xE004.0000 0xE004.0FFF Trace Port Interface Unit (TPIU) 0xE004.1000 0xFFFF.FFFF Reserved - a. All reserved space returns a bus fault when read or written. b. The unavailable flash will bus fault throughout this range. c. The unavailable SRAM will bus fault throughout this range. 42 March 17, 2008 Preliminary Memory Map 4 Interrupts The ARM Cortex-M3 processor and the Nested Vectored Interrupt Controller (NVIC) prioritize and handle all exceptions. All exceptions are handled in Handler Mode. The processor state is automatically stored to the stack on an exception, and automatically restored from the stack at the end of the Interrupt Service Routine (ISR). The vector is fetched in parallel to the state saving, which enables efficient interrupt entry. The processor supports tail-chaining, which enables back-to-back interrupts to be performed without the overhead of state saving and restoration. Table 4-1 on page 43 lists all exception types. Software can set eight priority levels on seven of these exceptions (system handlers) as well as on 32 interrupts (listed in Table 4-2 on page 44). Priorities on the system handlers are set with the NVIC System Handler Priority registers. Interrupts are enabled through the NVIC Interrupt Set Enable register and prioritized with the NVIC Interrupt Priority registers. You also can group priorities by splitting priority levels into pre-emption priorities and subpriorities. All of the interrupt registers are described in Chapter 8, “Nested Vectored Interrupt Controller” in the ARM® Cortex™-M3 Technical Reference Manual. Internally, the highest user-settable priority (0) is treated as fourth priority, after a Reset, NMI, and a Hard Fault. Note that 0 is the default priority for all the settable priorities. If you assign the same priority level to two or more interrupts, their hardware priority (the lower position number) determines the order in which the processor activates them. For example, if both GPIO Port A and GPIO Port B are priority level 1, then GPIO Port A has higher priority. See Chapter 5, “Exceptions” and Chapter 8, “Nested Vectored Interrupt Controller” in the ARM® Cortex™-M3 Technical Reference Manual for more information on exceptions and interrupts. Note: In Table 4-2 on page 44 interrupts not listed are reserved. Table 4-1. Exception Types Exception Type Position Prioritya Description - 0 - Stack top is loaded from first entry of vector table on reset. Invoked on power up and warm reset. On first instruction, drops to lowest priority (and then is called the base level of activation). This is asynchronous. Reset 1 -3 (highest) Cannot be stopped or preempted by any exception but reset. This is asynchronous. An NMI is only producible by software, using the NVIC Interrupt Control State register. Non-Maskable 2 -2 Interrupt (NMI) All classes of Fault, when the fault cannot activate due to priority or the configurable fault handler has been disabled. This is synchronous. Hard Fault 3 -1 MPU mismatch, including access violation and no match. This is synchronous. The priority of this exception can be changed. Memory Management 4 settable Pre-fetch fault, memory access fault, and other address/memory related faults. This is synchronous when precise and asynchronous when imprecise. You can enable or disable this fault. Bus Fault 5 settable Usage fault, such as undefined instruction executed or illegal state transition attempt. This is synchronous. Usage Fault 6 settable - 7-10 - Reserved. SVCall 11 settable System service call with SVC instruction. This is synchronous. March 17, 2008 43 Preliminary LM3S8933 Microcontroller Exception Type Position Prioritya Description Debug monitor (when not halting). This is synchronous, but only active when enabled. It does not activate if lower priority than the current activation. Debug Monitor 12 settable - 13 - Reserved. Pendable request for system service. This is asynchronous and only pended by software. PendSV 14 settable SysTick 15 settable System tick timer has fired. This is asynchronous. Asserted from outside the ARM Cortex-M3 core and fed through the NVIC (prioritized). These are all asynchronous. Table 4-2 on page 44 lists the interrupts on the LM3S8933 controller. 16 and settable above Interrupts a. 0 is the default priority for all the settable priorities. Table 4-2. Interrupts Interrupt (Bit in Interrupt Registers) Description 0 GPIO Port A 1 GPIO Port B 2 GPIO Port C 3 GPIO Port D 4 GPIO Port E 5 UART0 6 UART1 7 SSI0 8 I2C0 14 ADC Sequence 0 15 ADC Sequence 1 16 ADC Sequence 2 17 ADC Sequence 3 18 Watchdog timer 19 Timer0 A 20 Timer0 B 21 Timer1 A 22 Timer1 B 23 Timer2 A 24 Timer2 B 25 Analog Comparator 0 26 Analog Comparator 1 27 Analog Comparator 2 28 System Control 29 Flash Control 30 GPIO Port F 31 GPIO Port G 35 Timer3 A 36 Timer3 B 39 CAN0 44 March 17, 2008 Preliminary Interrupts Interrupt (Bit in Interrupt Registers) Description 42 Ethernet Controller 43 Hibernation Module March 17, 2008 45 Preliminary LM3S8933 Microcontroller 5 JTAG Interface The Joint Test Action Group (JTAG) port is an IEEE standard that defines a Test Access Port and Boundary Scan Architecture for digital integrated circuits and provides a standardized serial interface for controlling the associated test logic. The TAP, Instruction Register (IR), and Data Registers (DR) can be used to test the interconnections of assembled printed circuit boards and obtain manufacturing information on the components. The JTAG Port also provides a means of accessing and controlling design-for-test features such as I/O pin observation and control, scan testing, and debugging. The JTAG port is comprised of five pins: TRST, TCK, TMS, TDI, and TDO. Data is transmitted serially into the controller on TDI and out of the controller on TDO. The interpretation of this data is dependent on the current state of the TAP controller. For detailed information on the operation of the JTAG port and TAP controller, please refer to the IEEE Standard 1149.1-Test Access Port and Boundary-Scan Architecture. The Luminary Micro JTAG controller works with the ARM JTAG controller built into the Cortex-M3 core. This is implemented by multiplexing the TDO outputs from both JTAG controllers. ARM JTAG instructions select the ARM TDO output while Luminary Micro JTAG instructions select the Luminary Micro TDO outputs. The multiplexer is controlled by the Luminary Micro JTAG controller, which has comprehensive programming for the ARM, Luminary Micro, and unimplemented JTAG instructions. The JTAG module has the following features: ■ IEEE 1149.1-1990 compatible Test Access Port (TAP) controller ■ Four-bit Instruction Register (IR) chain for storing JTAG instructions ■ IEEE standard instructions: – BYPASS instruction – IDCODE instruction – SAMPLE/PRELOAD instruction – EXTEST instruction – INTEST instruction ■ ARM additional instructions: – APACC instruction – DPACC instruction – ABORT instruction ■ Integrated ARM Serial Wire Debug (SWD) See the ARM® Cortex™-M3 Technical Reference Manual for more information on the ARM JTAG controller. 46 March 17, 2008 Preliminary JTAG Interface 5.1 Block Diagram Figure 5-1. JTAG Module Block Diagram Instruction Register (IR) TAP Controller BYPASS Data Register Boundary Scan Data Register IDCODE Data Register ABORT Data Register DPACC Data Register APACC Data Register TCK TMS TDI TDO Cortex-M3 Debug Port TRST 5.2 Functional Description A high-level conceptual drawing of the JTAG module is shown in Figure 5-1 on page 47. The JTAG module is composed of the Test Access Port (TAP) controller and serial shift chains with parallel update registers. The TAP controller is a simple state machine controlled by the TRST, TCK and TMS inputs. The current state of the TAP controller depends on the current value of TRST and the sequence of values captured on TMS at the rising edge of TCK. The TAP controller determines when the serial shift chains capture new data, shift data from TDI towards TDO, and update the parallel load registers. The current state of the TAP controller also determines whether the Instruction Register (IR) chain or one of the Data Register (DR) chains is being accessed. The serial shift chains with parallel load registers are comprised of a single Instruction Register (IR) chain and multiple Data Register (DR) chains. The current instruction loaded in the parallel load register determines which DR chain is captured, shifted, or updated during the sequencing of the TAP controller. Some instructions, like EXTEST and INTEST, operate on data currently in a DR chain and do not capture, shift, or update any of the chains. Instructions that are not implemented decode to the BYPASS instruction to ensure that the serial path between TDI and TDO is always connected (see Table 5-2 on page 53 for a list of implemented instructions). See “JTAG and Boundary Scan” on page 546 for JTAG timing diagrams. March 17, 2008 47 Preliminary LM3S8933 Microcontroller 5.2.1 JTAG Interface Pins The JTAG interface consists of five standard pins: TRST,TCK, TMS, TDI, and TDO. These pins and their associated reset state are given in Table 5-1 on page 48. Detailed information on each pin follows. Table 5-1. JTAG Port Pins Reset State Pin Name Data Direction Internal Pull-Up Internal Pull-Down Drive Strength Drive Value TRST Input Enabled Disabled N/A N/A TCK Input Enabled Disabled N/A N/A TMS Input Enabled Disabled N/A N/A TDI Input Enabled Disabled N/A N/A TDO Output Enabled Disabled 2-mA driver High-Z 5.2.1.1 Test Reset Input (TRST) The TRST pin is an asynchronous active Low input signal for initializing and resetting the JTAG TAP controller and associated JTAG circuitry. When TRST is asserted, the TAP controller resets to the Test-Logic-Reset state and remains there while TRST is asserted. When the TAP controller enters the Test-Logic-Reset state, the JTAG Instruction Register (IR) resets to the default instruction, IDCODE. By default, the internal pull-up resistor on the TRST pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port B should ensure that the internal pull-up resistor remains enabled on PB7/TRST; otherwise JTAG communication could be lost. 5.2.1.2 Test Clock Input (TCK) The TCK pin is the clock for the JTAG module. This clock is provided so the test logic can operate independently of any other system clocks. In addition, it ensures that multiple JTAG TAP controllers that are daisy-chained together can synchronously communicate serial test data between components. During normal operation, TCK is driven by a free-running clock with a nominal 50% duty cycle. When necessary, TCK can be stopped at 0 or 1 for extended periods of time. While TCK is stopped at 0 or 1, the state of the TAP controller does not change and data in the JTAG Instruction and Data Registers is not lost. By default, the internal pull-up resistor on the TCK pin is enabled after reset. This assures that no clocking occurs if the pin is not driven from an external source. The internal pull-up and pull-down resistors can be turned off to save internal power as long as the TCK pin is constantly being driven by an external source. 5.2.1.3 Test Mode Select (TMS) The TMS pin selects the next state of the JTAG TAP controller. TMS is sampled on the rising edge of TCK. Depending on the current TAP state and the sampled value of TMS, the next state is entered. Because the TMS pin is sampled on the rising edge of TCK, the IEEE Standard 1149.1 expects the value on TMS to change on the falling edge of TCK. Holding TMS high for five consecutive TCK cycles drives the TAP controller state machine to the Test-Logic-Reset state. When the TAP controller enters the Test-Logic-Reset state, the JTAG Instruction Register (IR) resets to the default instruction, IDCODE. Therefore, this sequence can be used as a reset mechanism, similar to asserting TRST. The JTAG Test Access Port state machine can be seen in its entirety in Figure 5-2 on page 50. 48 March 17, 2008 Preliminary JTAG Interface By default, the internal pull-up resistor on the TMS pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port C should ensure that the internal pull-up resistor remains enabled on PC1/TMS; otherwise JTAG communication could be lost. 5.2.1.4 Test Data Input (TDI) The TDI pin provides a stream of serial information to the IR chain and the DR chains. TDI is sampled on the rising edge of TCK and, depending on the current TAP state and the current instruction, presents this data to the proper shift register chain. Because the TDI pin is sampled on the rising edge of TCK, the IEEE Standard 1149.1 expects the value on TDI to change on the falling edge of TCK. By default, the internal pull-up resistor on the TDI pin is enabled after reset. Changes to the pull-up resistor settings on GPIO Port C should ensure that the internal pull-up resistor remains enabled on PC2/TDI; otherwise JTAG communication could be lost. 5.2.1.5 Test Data Output (TDO) The TDO pin provides an output stream of serial information from the IR chain or the DR chains. The value of TDO depends on the current TAP state, the current instruction, and the data in the chain being accessed. In order to save power when the JTAG port is not being used, the TDO pin is placed in an inactive drive state when not actively shifting out data. Because TDO can be connected to the TDI of another controller in a daisy-chain configuration, the IEEE Standard 1149.1 expects the value on TDO to change on the falling edge of TCK. By default, the internal pull-up resistor on the TDO pin is enabled after reset. This assures that the pin remains at a constant logic level when the JTAG port is not being used. The internal pull-up and pull-down resistors can be turned off to save internal power if a High-Z output value is acceptable during certain TAP controller states. 5.2.2 JTAG TAP Controller The JTAG TAP controller state machine is shown in Figure 5-2 on page 50. The TAP controller state machine is reset to the Test-Logic-Reset state on the assertion of a Power-On-Reset (POR) or the assertion of TRST. Asserting the correct sequence on the TMS pin allows the JTAG module to shift in new instructions, shift in data, or idle during extended testing sequences. For detailed information on the function of the TAP controller and the operations that occur in each state, please refer to IEEE Standard 1149.1. March 17, 2008 49 Preliminary LM3S8933 Microcontroller Figure 5-2. Test Access Port State Machine Test Logic Reset Run Test Idle Select DR Scan Select IR Scan Capture DR Capture IR Shift DR Shift IR Exit 1 DR Exit 1 IR Exit 2 DR Exit 2 IR Pause DR Pause IR Update DR Update IR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5.2.3 Shift Registers The Shift Registers consist of a serial shift register chain and a parallel load register. The serial shift register chain samples specific information during the TAP controller’s CAPTURE states and allows this information to be shifted out of TDO during the TAP controller’s SHIFT states. While the sampled data is being shifted out of the chain on TDO, new data is being shifted into the serial shift register on TDI. This new data is stored in the parallel load register during the TAP controller’s UPDATE states. Each of the shift registers is discussed in detail in “Register Descriptions” on page 53. 5.2.4 Operational Considerations There are certain operational considerations when using the JTAG module. Because the JTAG pins can be programmed to be GPIOs, board configuration and reset conditions on these pins must be considered. In addition, because the JTAG module has integrated ARM Serial Wire Debug, the method for switching between these two operational modes is described below. 50 March 17, 2008 Preliminary JTAG Interface 5.2.4.1 GPIO Functionality When the controller is reset with either a POR or RST, the JTAG/SWD port pins default to their JTAG/SWD configurations. The default configuration includes enabling digital functionality (setting GPIODEN to 1), enabling the pull-up resistors (setting GPIOPUR to 1), and enabling the alternate hardware function (setting GPIOAFSEL to 1) for the PB7 and PC[3:0] JTAG/SWD pins. It is possible for software to configure these pins as GPIOs after reset by writing 0s to PB7 and PC[3:0] in the GPIOAFSEL register. If the user does not require the JTAG/SWD port for debugging or board-level testing, this provides five more GPIOs for use in the design. Caution – If the JTAG pins are used as GPIOs in a design, PB7 and PC2 cannot have external pull-down resistors connected to both of them at the same time. If both pins are pulled Low during reset, the controller has unpredictable behavior. If this happens, remove one or both of the pull-down resistors, and apply RST or power-cycle the part. In addition, it is possible to create a software sequence that prevents the debugger from connecting to the Stellaris® microcontroller. If the program code loaded into flash immediately changes the JTAG pins to their GPIO functionality, the debugger may not have enough time to connect and halt the controller before the JTAG pin functionality switches. This may lock the debugger out of the part. This can be avoided with a software routine that restores JTAG functionality based on an external or software trigger. The commit control registers provide a layer of protection against accidental programming of critical hardware peripherals. Writes to protected bits of the GPIO Alternate Function Select (GPIOAFSEL) register (see page 179) are not committed to storage unless the GPIO Lock (GPIOLOCK) register (see page 189) has been unlocked and the appropriate bits of the GPIO Commit (GPIOCR) register (see page 190) have been set to 1. Recovering a "Locked" Device If software configures any of the JTAG/SWD pins as GPIO and loses the ability to communicate with the debugger, there is a debug sequence that can be used to recover the device. Performing a total of ten JTAG-to-SWD and SWD-to-JTAG switch sequences while holding the device in reset mass erases the flash memory. The sequence to recover the device is: 1. Assert and hold the RST signal. 2. Perform the JTAG-to-SWD switch sequence. 3. Perform the SWD-to-JTAG switch sequence. 4. Perform the JTAG-to-SWD switch sequence. 5. Perform the SWD-to-JTAG switch sequence. 6. Perform the JTAG-to-SWD switch sequence. 7. Perform the SWD-to-JTAG switch sequence. 8. Perform the JTAG-to-SWD switch sequence. 9. Perform the SWD-to-JTAG switch sequence. 10. Perform the JTAG-to-SWD switch sequence. 11. Perform the SWD-to-JTAG switch sequence. March 17, 2008 51 Preliminary LM3S8933 Microcontroller 12. Release the RST signal. The JTAG-to-SWD and SWD-to-JTAG switch sequences are described in “ARM Serial Wire Debug (SWD)” on page 52. When performing switch sequences for the purpose of recovering the debug capabilities of the device, only steps 1 and 2 of the switch sequence need to be performed. 5.2.4.2 ARM Serial Wire Debug (SWD) In order to seamlessly integrate the ARM Serial Wire Debug (SWD) functionality, a serial-wire debugger must be able to connect to the Cortex-M3 core without having to perform, or have any knowledge of, JTAG cycles. This is accomplished with a SWD preamble that is issued before the SWD session begins. The preamble used to enable the SWD interface of the SWJ-DP module starts with the TAP controller in the Test-Logic-Reset state. From here, the preamble sequences the TAP controller through the following states: Run Test Idle, Select DR, Select IR, Test Logic Reset, Test Logic Reset, Run Test Idle, Run Test Idle, Select DR, Select IR, Test Logic Reset, Test Logic Reset, Run Test Idle, Run Test Idle, Select DR, Select IR, and Test Logic Reset states. Stepping through this sequences of the TAP state machine enables the SWD interface and disables the JTAG interface. For more information on this operation and the SWD interface, see the ARM® Cortex™-M3 Technical Reference Manual and the ARM® CoreSight Technical Reference Manual. Because this sequence is a valid series of JTAG operations that could be issued, the ARM JTAG TAP controller is not fully compliant to the IEEE Standard 1149.1. This is the only instance where the ARM JTAG TAP controller does not meet full compliance with the specification. Due to the low probability of this sequence occurring during normal operation of the TAP controller, it should not affect normal performance of the JTAG interface. JTAG-to-SWD Switching To switch the operating mode of the Debug Access Port (DAP) from JTAG to SWD mode, the external debug hardware must send a switch sequence to the device. The 16-bit switch sequence for switching to SWD mode is defined as b1110011110011110, transmitted LSB first. This can also be represented as 16'hE79E when transmitted LSB first. The complete switch sequence should consist of the following transactions on the TCK/SWCLK and TMS/SWDIO signals: 1. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that both JTAG and SWD are in their reset/idle states. 2. Send the 16-bit JTAG-to-SWD switch sequence, 16'hE79E. 3. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that if SWJ-DP was already in SWD mode, before sending the switch sequence, the SWD goes into the line reset state. SWD-to-JTAG Switching To switch the operating mode of the Debug Access Port (DAP) from SWD to JTAG mode, the external debug hardware must send a switch sequence to the device. The 16-bit switch sequence for switching to JTAG mode is defined as b1110011110011110, transmitted LSB first. This can also be represented as 16'hE73C when transmitted LSB first. The complete switch sequence should consist of the following transactions on the TCK/SWCLK and TMS/SWDIO signals: 1. Send at least 50 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that both JTAG and SWD are in their reset/idle states. 52 March 17, 2008 Preliminary JTAG Interface 2. Send the 16-bit SWD-to-JTAG switch sequence, 16'hE73C. 3. Send at least 5 TCK/SWCLK cycles with TMS/SWDIO set to 1. This ensures that if SWJ-DP was already in JTAG mode, before sending the switch sequence, the JTAG goes into the Test Logic Reset state. 5.3 Initialization and Configuration After a Power-On-Reset or an external reset (RST), the JTAG pins are automatically configured for JTAG communication. No user-defined initialization or configuration is needed. However, if the user application changes these pins to their GPIO function, they must be configured back to their JTAG functionality before JTAG communication can be restored. This is done by enabling the five JTAG pins (PB7 and PC[3:0]) for their alternate function using the GPIOAFSEL register. 5.4 Register Descriptions There are no APB-accessible registers in the JTAG TAP Controller or Shift Register chains. The registers within the JTAG controller are all accessed serially through the TAP Controller. The registers can be broken down into two main categories: Instruction Registers and Data Registers. 5.4.1 Instruction Register (IR) The JTAG TAP Instruction Register (IR) is a four-bit serial scan chain with a parallel load register connected between the JTAG TDI and TDO pins. When the TAP Controller is placed in the correct states, bits can be shifted into the Instruction Register. Once these bits have been shifted into the chain and updated, they are interpreted as the current instruction. The decode of the Instruction Register bits is shown in Table 5-2 on page 53. A detailed explanation of each instruction, along with its associated Data Register, follows. Table 5-2. JTAG Instruction Register Commands IR[3:0] Instruction Description Drives the values preloaded into the Boundary Scan Chain by the SAMPLE/PRELOAD instruction onto the pads. 0000 EXTEST Drives the values preloaded into the Boundary Scan Chain by the SAMPLE/PRELOAD instruction into the controller. 0001 INTEST Captures the current I/O values and shifts the sampled values out of the Boundary Scan Chain while new preload data is shifted in. 0010 SAMPLE / PRELOAD 1000 ABORT Shifts data into the ARM Debug Port Abort Register. 1010 DPACC Shifts data into and out of the ARM DP Access Register. 1011 APACC Shifts data into and out of the ARM AC Access Register. Loads manufacturing information defined by the IEEE Standard 1149.1 into the IDCODE chain and shifts it out. 1110 IDCODE 1111 BYPASS Connects TDI to TDO through a single Shift Register chain. All Others Reserved Defaults to the BYPASS instruction to ensure that TDI is always connected to TDO. 5.4.1.1 EXTEST Instruction The EXTEST instruction does not have an associated Data Register chain. The EXTEST instruction uses the data that has been preloaded into the Boundary Scan Data Register using the SAMPLE/PRELOAD instruction. When the EXTEST instruction is present in the Instruction Register, the preloaded data in the Boundary Scan Data Register associated with the outputs and output enables are used to drive the GPIO pads rather than the signals coming from the core. This allows March 17, 2008 53 Preliminary LM3S8933 Microcontroller tests to be developed that drive known values out of the controller, which can be used to verify connectivity. 5.4.1.2 INTEST Instruction The INTEST instruction does not have an associated Data Register chain. The INTEST instruction uses the data that has been preloaded into the Boundary Scan Data Register using the SAMPLE/PRELOAD instruction. When the INTEST instruction is present in the Instruction Register, the preloaded data in the Boundary Scan Data Register associated with the inputs are used to drive the signals going into the core rather than the signals coming from the GPIO pads. This allows tests to be developed that drive known values into the controller, which can be used for testing. It is important to note that although the RST input pin is on the Boundary Scan Data Register chain, it is only observable. 5.4.1.3 SAMPLE/PRELOAD Instruction The SAMPLE/PRELOAD instruction connects the Boundary Scan Data Register chain between TDI and TDO. This instruction samples the current state of the pad pins for observation and preloads new test data. Each GPIO pad has an associated input, output, and output enable signal. When the TAP controller enters the Capture DR state during this instruction, the input, output, and output-enable signals to each of the GPIO pads are captured. These samples are serially shifted out of TDO while the TAP controller is in the Shift DR state and can be used for observation or comparison in various tests. While these samples of the inputs, outputs, and output enables are being shifted out of the Boundary Scan Data Register, new data is being shifted into the Boundary Scan Data Register from TDI. Once the new data has been shifted into the Boundary Scan Data Register, the data is saved in the parallel load registers when the TAP controller enters the Update DR state. This update of the parallel load register preloads data into the Boundary Scan Data Register that is associated with each input, output, and output enable. This preloaded data can be used with the EXTEST and INTEST instructions to drive data into or out of the controller. Please see “Boundary Scan Data Register” on page 56 for more information. 5.4.1.4 ABORT Instruction The ABORT instruction connects the associated ABORT Data Register chain between TDI and TDO. This instruction provides read and write access to the ABORT Register of the ARM Debug Access Port (DAP). Shifting the proper data into this Data Register clears various error bits or initiates a DAP abort of a previous request. Please see the “ABORT Data Register” on page 56 for more information. 5.4.1.5 DPACC Instruction The DPACC instruction connects the associated DPACC Data Register chain between TDI and TDO. This instruction provides read and write access to the DPACC Register of the ARM Debug Access Port (DAP). Shifting the proper data into this register and reading the data output from this register allows read and write access to the ARM debug and status registers. Please see “DPACC Data Register” on page 56 for more information. 5.4.1.6 APACC Instruction The APACC instruction connects the associated APACC Data Register chain between TDI and TDO. This instruction provides read and write access to the APACC Register of the ARM Debug Access Port (DAP). Shifting the proper data into this register and reading the data output from this register allows read and write access to internal components and buses through the Debug Port. Please see “APACC Data Register” on page 56 for more information. 54 March 17, 2008 Preliminary JTAG Interface 5.4.1.7 IDCODE Instruction The IDCODE instruction connects the associated IDCODE Data Register chain between TDI and TDO. This instruction provides information on the manufacturer, part number, and version of the ARM core. This information can be used by testing equipment and debuggers to automatically configure their input and output data streams. IDCODE is the default instruction that is loaded into the JTAG Instruction Register when a power-on-reset (POR) is asserted, TRST is asserted, or the Test-Logic-Reset state is entered. Please see “IDCODE Data Register” on page 55 for more information. 5.4.1.8 BYPASS Instruction The BYPASS instruction connects the associated BYPASS Data Register chain between TDI and TDO. This instruction is used to create a minimum length serial path between the TDI and TDO ports. The BYPASS Data Register is a single-bit shift register. This instruction improves test efficiency by allowing components that are not needed for a specific test to be bypassed in the JTAG scan chain by loading them with the BYPASS instruction. Please see “BYPASS Data Register” on page 55 for more information. 5.4.2 Data Registers The JTAG module contains six Data Registers. These include: IDCODE, BYPASS, Boundary Scan, APACC, DPACC, and ABORT serial Data Register chains. Each of these Data Registers is discussed in the following sections. 5.4.2.1 IDCODE Data Register The format for the 32-bit IDCODE Data Register defined by the IEEE Standard 1149.1 is shown in Figure 5-3 on page 55. The standard requires that every JTAG-compliant device implement either the IDCODE instruction or the BYPASS instruction as the default instruction. The LSB of the IDCODE Data Register is defined to be a 1 to distinguish it from the BYPASS instruction, which has an LSB of 0. This allows auto configuration test tools to determine which instruction is the default instruction. The major uses of the JTAG port are for manufacturer testing of component assembly, and program development and debug. To facilitate the use of auto-configuration debug tools, the IDCODE instruction outputs a value of 0x3BA00477. This value indicates an ARM Cortex-M3, Version 1 processor. This allows the debuggers to automatically configure themselves to work correctly with the Cortex-M3 during debug. Figure 5-3. IDCODE Register Format Version Part Number Manufacturer ID 1 31 28 27 12 11 1 0 TDI TDO 5.4.2.2 BYPASS Data Register The format for the 1-bit BYPASS Data Register defined by the IEEE Standard 1149.1 is shown in Figure 5-4 on page 56. The standard requires that every JTAG-compliant device implement either the BYPASS instruction or the IDCODE instruction as the default instruction. The LSB of the BYPASS Data Register is defined to be a 0 to distinguish it from the IDCODE instruction, which has an LSB of 1. This allows auto configuration test tools to determine which instruction is the default instruction. March 17, 2008 55 Preliminary LM3S8933 Microcontroller Figure 5-4. BYPASS Register Format TDI 0 TDO 0 5.4.2.3 Boundary Scan Data Register The format of the Boundary Scan Data Register is shown in Figure 5-5 on page 56. Each GPIO pin, in a counter-clockwise direction from the JTAG port pins, is included in the Boundary Scan Data Register. Each GPIO pin has three associated digital signals that are included in the chain. These signals are input, output, and output enable, and are arranged in that order as can be seen in the figure. In addition to the GPIO pins, the controller reset pin, RST, is included in the chain. Because the reset pin is always an input, only the input signal is included in the Data Register chain. When the Boundary Scan Data Register is accessed with the SAMPLE/PRELOAD instruction, the input, output, and output enable from each digital pad are sampled and then shifted out of the chain to be verified. The sampling of these values occurs on the rising edge of TCK in the Capture DR state of the TAP controller. While the sampled data is being shifted out of the Boundary Scan chain in the Shift DR state of the TAP controller, new data can be preloaded into the chain for use with the EXTEST and INTEST instructions. These instructions either force data out of the controller, with the EXTEST instruction, or into the controller, with the INTEST instruction. Figure 5-5. Boundary Scan Register Format O TDO TDI O IN E UT O O IN U E T O O IN E UT O O IN U E T I N ... ... GPIO PB6 GPIO m RST GPIO m+1 GPIO n For detailed information on the order of the input, output, and output enable bits for each of the GPIO ports, please refer to the Stellaris® Family Boundary Scan Description Language (BSDL) files, downloadable from www.luminarymicro.com. 5.4.2.4 APACC Data Register The format for the 35-bit APACC Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 5.4.2.5 DPACC Data Register The format for the 35-bit DPACC Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 5.4.2.6 ABORT Data Register The format for the 35-bit ABORT Data Register defined by ARM is described in the ARM® Cortex™-M3 Technical Reference Manual. 56 March 17, 2008 Preliminary JTAG Interface 6 System Control System control determines the overall operation of the device. It provides information about the device, controls the clocking to the core and individual peripherals, and handles reset detection and reporting. 6.1 Functional Description The System Control module provides the following capabilities: ■ Device identification, see “Device Identification” on page 57 ■ Local control, such as reset (see “Reset Control” on page 57), power (see “Power Control” on page 60) and clock control (see “Clock Control” on page 60) ■ System control (Run, Sleep, and Deep-Sleep modes), see “System Control” on page 62 6.1.1 Device Identification Seven read-only registers provide software with information on the microcontroller, such as version, part number, SRAM size, flash size, and other features. See the DID0, DID1, and DC0-DC4 registers. 6.1.2 Reset Control This section discusses aspects of hardware functions during reset as well as system software requirements following the reset sequence. 6.1.2.1 CMOD0 and CMOD1 Test-Mode Control Pins Two pins, CMOD0 and CMOD1, are defined for use by Luminary Micro for testing the devices during manufacture. They have no end-user function and should not be used. The CMOD pins should be connected to ground. 6.1.2.2 Reset Sources The controller has five sources of reset: 1. External reset input pin (RST) assertion, see “RST Pin Assertion” on page 57. 2. Power-on reset (POR), see “Power-On Reset (POR)” on page 58. 3. Internal brown-out (BOR) detector, see “Brown-Out Reset (BOR)” on page 58. 4. Software-initiated reset (with the software reset registers), see “Software Reset” on page 59. 5. A watchdog timer reset condition violation, see “Watchdog Timer Reset” on page 59. After a reset, the Reset Cause (RESC) register is set with the reset cause. The bits in this register are sticky and maintain their state across multiple reset sequences, except when an internal POR is the cause, and then all the other bits in the RESC register are cleared except for the POR indicator. 6.1.2.3 RST Pin Assertion The external reset pin (RST) resets the controller. This resets the core and all the peripherals except the JTAG TAP controller (see “JTAG Interface” on page 46). The external reset sequence is as follows: March 17, 2008 57 Preliminary LM3S8933 Microcontroller 1. The external reset pin (RST) is asserted and then de-asserted. 2. The internal reset is released and the core loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. A few clocks cycles from RST de-assertion to the start of the reset sequence is necessary for synchronization. The external reset timing is shown in Figure 22-11 on page 548. 6.1.2.4 Power-On Reset (POR) The Power-On Reset (POR) circuit monitors the power supply voltage (VDD). The POR circuit generates a reset signal to the internal logic when the power supply ramp reaches a threshold value (VTH). If the application only uses the POR circuit, the RST input needs to be connected to the power supply (VDD) through a pull-up resistor (1K to 10K Ω). The device must be operating within the specified operating parameters at the point when the on-chip power-on reset pulse is complete. The 3.3-V power supply to the device must reach 3.0 V within 10 msec of it crossing 2.0 V to guarantee proper operation. For applications that require the use of an external reset to hold the device in reset longer than the internal POR, the RST input may be used with the circuit as shown in Figure 6-1 on page 58. Figure 6-1. External Circuitry to Extend Reset R1 C1 R2 RST Stellaris D1 The R1 and C1 components define the power-on delay. The R2 resistor mitigates any leakage from the RST input. The diode (D1) discharges C1 rapidly when the power supply is turned off. The Power-On Reset sequence is as follows: 1. The controller waits for the later of external reset (RST) or internal POR to go inactive. 2. The internal reset is released and the core loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. The internal POR is only active on the initial power-up of the controller. The Power-On Reset timing is shown in Figure 22-12 on page 549. Note: The power-on reset also resets the JTAG controller. An external reset does not. 6.1.2.5 Brown-Out Reset (BOR) A drop in the input voltage resulting in the assertion of the internal brown-out detector can be used to reset the controller. This is initially disabled and may be enabled by software. The system provides a brown-out detection circuit that triggers if the power supply (VDD) drops below a brown-out threshold voltage (VBTH). If a brown-out condition is detected, the system may generate a controller interrupt or a system reset. 58 March 17, 2008 Preliminary System Control Brown-out resets are controlled with the Power-On and Brown-Out Reset Control (PBORCTL) register. The BORIOR bit in the PBORCTL register must be set for a brown-out condition to trigger a reset. The brown-out reset is equivelent to an assertion of the external RST input and the reset is held active until the proper VDD level is restored. The RESC register can be examined in the reset interrupt handler to determine if a Brown-Out condition was the cause of the reset, thus allowing software to determine what actions are required to recover. The internal Brown-Out Reset timing is shown in Figure 22-13 on page 549. 6.1.2.6 Software Reset Software can reset a specific peripheral or generate a reset to the entire system . Peripherals can be individually reset by software via three registers that control reset signals to each peripheral (see the SRCRn registers). If the bit position corresponding to a peripheral is set and subsequently cleared, the peripheral is reset. The encoding of the reset registers is consistent with the encoding of the clock gating control for peripherals and on-chip functions (see “System Control” on page 62). Note that all reset signals for all clocks of the specified unit are asserted as a result of a software-initiated reset. The entire system can be reset by software by setting the SYSRESETREQ bit in the Cortex-M3 Application Interrupt and Reset Control register resets the entire system including the core. The software-initiated system reset sequence is as follows: 1. A software system reset is initiated by writing the SYSRESETREQ bit in the ARM Cortex-M3 Application Interrupt and Reset Control register. 2. An internal reset is asserted. 3. The internal reset is deasserted and the controller loads from memory the initial stack pointer, the initial program counter, and the first instruction designated by the program counter, and then begins execution. The software-initiated system reset timing is shown in Figure 22-14 on page 549. 6.1.2.7 Watchdog Timer Reset The watchdog timer module's function is to prevent system hangs. The watchdog timer can be configured to generate an interrupt to the controller on its first time-out, and to generate a reset signal on its second time-out. After the first time-out event, the 32-bit counter is reloaded with the value of the Watchdog Timer Load (WDTLOAD) register, and the timer resumes counting down from that value. If the timer counts down to its zero state again before the first time-out interrupt is cleared, and the reset signal has been enabled, the watchdog timer asserts its reset signal to the system. The watchdog timer reset sequence is as follows: 1. The watchdog timer times out for the second time without being serviced. 2. An internal reset is asserted. 3. The internal reset is released and the controller loads from memory the initial stack pointer, the initial program counter, the first instruction designated by the program counter, and begins execution. March 17, 2008 59 Preliminary LM3S8933 Microcontroller The watchdog reset timing is shown in Figure 22-15 on page 549. 6.1.3 Power Control The Stellaris® microcontroller provides an integrated LDO regulator that may be used to provide power to the majority of the controller's internal logic. The LDO regulator provides software a mechanism to adjust the regulated value, in small increments (VSTEP), over the range of 2.25 V to 2.75 V (inclusive)—or 2.5 V ± 10%. The adjustment is made by changing the value of the VADJ field in the LDO Power Control (LDOPCTL) register. Note: The use of the LDO is optional. The internal logic may be supplied by the on-chip LDO or by an external regulator. If the LDO is used, the LDO output pin is connected to the VDD25 pins on the printed circuit board. The LDO requires decoupling capacitors on the printed circuit board. If an external regulator is used, it is strongly recommended that the external regulator supply the controller only and not be shared with other devices on the printed circuit board. 6.1.4 Clock Control System control determines the control of clocks in this part. 6.1.4.1 Fundamental Clock Sources There are four clock sources for use in the device: ■ Internal Oscillator (IOSC): The internal oscillator is an on-chip clock source. It does not require the use of any external components. The frequency of the internal oscillator is 12 MHz ± 30%. Applications that do not depend on accurate clock sources may use this clock source to reduce system cost. The internal oscillator is the clock source the device uses during and following POR. If the main oscillator is required, software must enable the main oscillator following reset and allow the main oscillator to stabilize before changing the clock reference. ■ Main Oscillator (MOSC): The main oscillator provides a frequency-accurate clock source by one of two means: an external single-ended clock source is connected to the OSC0 input pin, or an external crystal is connected across the OSC0 input and OSC1 output pins. The crystal value allowed depends on whether the main oscillator is used as the clock reference source to the PLL. If so, the crystal must be one of the supported frequencies between 3.579545 MHz through 8.192 MHz (inclusive). If the PLL is not being used, the crystal may be any one of the supported frequencies between 1 MHz and 8.192 MHz. The single-ended clock source range is from DC through the specified speed of the device. The supported crystals are listed in the XTAL bit field in the RCC register (see page 74). ■ Internal 30-kHz Oscillator: The internal 30-kHz oscillator is similar to the internal oscillator, except that it provides an operational frequency of 30 kHz ± 30%. It is intended for use during Deep-Sleep power-saving modes. This power-savings mode benefits from reduced internal switching and also allows the main oscillator to be powered down. ■ External Real-Time Oscillator: The external real-time oscillator provides a low-frequency, accurate clock reference. It is intended to provide the system with a real-time clock source. The real-time oscillator is part of the Hibernation Module (“Hibernation Module” on page 119) and may also provide an accurate source of Deep-Sleep or Hibernate mode power savings. The internal system clock (SysClk), is derived from any of the four sources plus two others: the output of the main internal PLL, and the internal oscillator divided by four (3 MHz ± 30%). The frequency of the PLL clock reference must be in the range of 3.579545 MHz to 8.192 MHz (inclusive). 60 March 17, 2008 Preliminary System Control The Run-Mode Clock Configuration (RCC) and Run-Mode Clock Configuration 2 (RCC2) registers provide control for the system clock. The RCC2 register is provided to extend fields that offer additional encodings over the RCC register. When used, the RCC2 register field values are used by the logic over the corresponding field in the RCC register. In particular, RCC2 provides for a larger assortment of clock configuration options. Figure 6-2 on page 61 shows the logic for the main clock tree. The peripheral blocks are driven by the system clock signal and can be programmatically enabled/disabled. The ADC clock signal is automatically divided down to 16 MHz for proper ADC operation. Figure 6-2. Main Clock Tree PLL (240 MHz) ÷ 4 PLL Main OSC (400 MHz) Internal OSC (12 MHz) Internal OSC (30 kHz) ÷ 4 Hibernation Module (32.768 kHz) ÷ 25 PWRDN ADC Clock System Clock USB Clock XTALa USBPWRDNc XTALa PWRDN b MOSCDIS a IOSCDISa OSCSRCb,d BYPASS b,d SYSDIVb,d USESYSDIV a,d PWMDW a USEPWMDIVa PWM Clock a. Control provided by RCC register bit/field. b. Control provided by RCC register bit/field or RCC2 register bit/field, if overridden with RCC2 register bit USERCC2. c. Control provided by RCC2 register bit/field. d. Also may be controlled by DSLPCLKCFG when in deep sleep mode. 6.1.4.2 Crystal Configuration for the Main Oscillator (MOSC) The main oscillator supports the use of a select number of crystals. If the main oscillator is used by the PLL as a reference clock, the supported range of crystals is 3.579545 to 8.192 MHz, otherwise, the range of supported crystals is 1 to 8.192 MHz. The XTAL bit in the RCC register (see page 74) describes the available crystal choices and default programming values. Software configures the RCC register XTAL field with the crystal number. If the PLL is used in the design, the XTAL field value is internally translated to the PLL settings. March 17, 2008 61 Preliminary LM3S8933 Microcontroller 6.1.4.3 Main PLL Frequency Configuration The main PLL is disabled by default during power-on reset and is enabled later by software if required. Software configures the main PLL input reference clock source, specifies the output divisor to set the system clock frequency, and enables the main PLL to drive the output. If the main oscillator provides the clock reference to the main PLL, the translation provided by hardware and used to program the PLL is available for software in the XTAL to PLL Translation (PLLCFG) register (see page 78). The internal translation provides a translation within ± 1% of the targeted PLL VCO frequency. The Crystal Value field (XTAL) on page 74 describes the available crystal choices and default programming of the PLLCFG register. The crystal number is written into the XTAL field of the Run-Mode Clock Configuration (RCC) register. Any time the XTAL field changes, the new settings are translated and the internal PLL settings are updated. 6.1.4.4 PLL Modes The PLL has two modes of operation: Normal and Power-Down ■ Normal: The PLL multiplies the input clock reference and drives the output. ■ Power-Down: Most of the PLL internal circuitry is disabled and the PLL does not drive the output. The modes are programmed using the RCC/RCC2 register fields (see page 74 and page 79). 6.1.4.5 PLL Operation If a PLL configuration is changed, the PLL output frequency is unstable until it reconverges (relocks) to the new setting. The time between the configuration change and relock is TREADY (see Table 22-6 on page 538). During the relock time, the affected PLL is not usable as a clock reference. The PLL is changed by one of the following: ■ Change to the XTAL value in the RCC register—writes of the same value do not cause a relock. ■ Change in the PLL from Power-Down to Normal mode. A counter is defined to measure the TREADY requirement. The counter is clocked by the main oscillator. The range of the main oscillator has been taken into account and the down counter is set to 0x1200 (that is, ~600 μs at an 8.192 MHz external oscillator clock). . Hardware is provided to keep the PLL from being used as a system clock until the TREADY condition is met after one of the two changes above. It is the user's responsibility to have a stable clock source (like the main oscillator) before the RCC/RCC2 register is switched to use the PLL. If the main PLL is enabled and the system clock is switched to use the PLL in one step, the system control hardware continues to clock the controller from the source to the PLL until the main PLL is stable (TREADY time met), after which it changes to the PLL. Software can use many methods to ensure that the system is clocked from the main PLL, including periodically polling the PLLLRIS bit in the Raw Interrupt Status (RIS) register, and enabling the PLL Lock interrupt. 6.1.5 System Control For power-savings purposes, the RCGCn , SCGCn , and DCGCn registers control the clock gating logic for each peripheral or block in the system while the controller is in Run, Sleep, and Deep-Sleep mode, respectively. 62 March 17, 2008 Preliminary System Control In Run mode, the processor executes code. In Sleep mode, the clock frequency of the active peripherals is unchanged, but the processor is not clocked and therefore no longer executes code. In Deep-Sleep mode, the clock frequency of the active peripherals may change (depending on the Run mode clock configuration) in addition to the processor clock being stopped. An interrupt returns the device to Run mode from one of the sleep modes; the sleep modes are entered on request from the code. Each mode is described in more detail below. There are four levels of operation for the device defined as: ■ Run Mode. Run mode provides normal operation of the processor and all of the peripherals that are currently enabled by the RCGCn registers. The system clock can be any of the available clock sources including the PLL. ■ Sleep Mode. Sleep mode is entered by the Cortex-M3 core executing a WFI (Wait for Interrupt) instruction. Any properly configured interrupt event in the system will bring the processor back into Run mode. See the system control NVIC section of the ARM® Cortex™-M3 Technical Reference Manual for more details. In Sleep mode, the Cortex-M3 processor core and the memory subsystem are not clocked. Peripherals are clocked that are enabled in the SCGCn register when auto-clock gating is enabled (see the RCC register) or the RCGCn register when the auto-clock gating is disabled. The system clock has the same source and frequency as that during Run mode. ■ Deep-Sleep Mode. Deep-Sleep mode is entered by first writing the Deep Sleep Enable bit in the ARM Cortex-M3 NVIC system control register and then executing a WFI instruction. Any properly configured interrupt event in the system will bring the processor back into Run mode. See the system control NVIC section of the ARM® Cortex™-M3 Technical Reference Manual for more details. The Cortex-M3 processor core and the memory subsystem are not clocked. Peripherals are clocked that are enabled in the DCGCn register when auto-clock gating is enabled (see the RCC register) or the RCGCn register when auto-clock gating is disabled. The system clock source is the main oscillator by default or the internal oscillator specified in the DSLPCLKCFG register if one is enabled. When the DSLPCLKCFG register is used, the internal oscillator is powered up, if necessary, and the main oscillator is powered down. If the PLL is running at the time of the WFI instruction, hardware will power the PLL down and override the SYSDIV field of the active RCC/RCC2 register to be /16 or /64, respectively. When the Deep-Sleep exit event occurs, hardware brings the system clock back to the source and frequency it had at the onset of Deep-Sleep mode before enabling the clocks that had been stopped during the Deep-Sleep duration. ■ Hibernate Mode. In this mode, the power supplies are turned off to the main part of the device and only the Hibernation module's circuitry is active. An external wake event or RTC event is required to bring the device back to Run mode. The Cortex-M3 processor and peripherals outside of the Hibernation module see a normal "power on" sequence and the processor starts running code. It can determine that it has been restarted from Hibernate mode by inspecting the Hibernation module registers. 6.2 Initialization and Configuration The PLL is configured using direct register writes to the RCC/RCC2 register. If the RCC2 register is being used, the USERCC2 bit must be set and the appropriate RCC2 bit/field is used. The steps required to successfully change the PLL-based system clock are: March 17, 2008 63 Preliminary LM3S8933 Microcontroller 1. Bypass the PLL and system clock divider by setting the BYPASS bit and clearing the USESYS bit in the RCC register. This configures the system to run off a “raw” clock source (using the main oscillator or internal oscillator) and allows for the new PLL configuration to be validated before switching the system clock to the PLL. 2. Select the crystal value (XTAL) and oscillator source (OSCSRC), and clear the PWRDN bit in RCC/RCC2. Setting the XTAL field automatically pulls valid PLL configuration data for the appropriate crystal, and clearing the PWRDN bit powers and enables the PLL and its output. 3. Select the desired system divider (SYSDIV) in RCC/RCC2 and set the USESYS bit in RCC. The SYSDIV field determines the system frequency for the microcontroller. 4. Wait for the PLL to lock by polling the PLLLRIS bit in the Raw Interrupt Status (RIS) register. 5. Enable use of the PLL by clearing the BYPASS bit in RCC/RCC2. 6.3 Register Map Table 6-1 on page 64 lists the System Control registers, grouped by function. The offset listed is a hexadecimal increment to the register’s address, relative to the System Control base address of 0x400F.E000. Note: Spaces in the System Control register space that are not used are reserved for future or internal use by Luminary Micro, Inc. Software should not modify any reserved memory address. Table 6-1. System Control Register Map See Offset Name Type Reset Description page 0x000 DID0 RO - Device Identification 0 66 0x004 DID1 RO - Device Identification 1 82 0x008 DC0 RO 0x00FF.007F Device Capabilities 0 84 0x010 DC1 RO 0x0101.33FF Device Capabilities 1 85 0x014 DC2 RO 0x070F.1013 Device Capabilities 2 87 0x018 DC3 RO 0x0F0F.3FC0 Device Capabilities 3 89 0x01C DC4 RO 0x5100.007F Device Capabilities 4 91 0x030 PBORCTL R/W 0x0000.7FFD Brown-Out Reset Control 68 0x034 LDOPCTL R/W 0x0000.0000 LDO Power Control 69 0x040 SRCR0 R/W 0x00000000 Software Reset Control 0 114 0x044 SRCR1 R/W 0x00000000 Software Reset Control 1 115 0x048 SRCR2 R/W 0x00000000 Software Reset Control 2 117 0x050 RIS RO 0x0000.0000 Raw Interrupt Status 70 0x054 IMC R/W 0x0000.0000 Interrupt Mask Control 71 0x058 MISC R/W1C 0x0000.0000 Masked Interrupt Status and Clear 72 0x05C RESC R/W - Reset Cause 73 64 March 17, 2008 Preliminary System Control See Offset Name Type Reset Description page 0x060 RCC R/W 0x0780.3AD1 Run-Mode Clock Configuration 74 0x064 PLLCFG RO - XTAL to PLL Translation 78 0x070 RCC2 R/W 0x0780.2800 Run-Mode Clock Configuration 2 79 0x100 RCGC0 R/W 0x00000040 Run Mode Clock Gating Control Register 0 93 0x104 RCGC1 R/W 0x00000000 Run Mode Clock Gating Control Register 1 99 0x108 RCGC2 R/W 0x00000000 Run Mode Clock Gating Control Register 2 108 0x110 SCGC0 R/W 0x00000040 Sleep Mode Clock Gating Control Register 0 95 0x114 SCGC1 R/W 0x00000000 Sleep Mode Clock Gating Control Register 1 102 0x118 SCGC2 R/W 0x00000000 Sleep Mode Clock Gating Control Register 2 110 0x120 DCGC0 R/W 0x00000040 Deep Sleep Mode Clock Gating Control Register 0 97 0x124 DCGC1 R/W 0x00000000 Deep Sleep Mode Clock Gating Control Register 1 105 0x128 DCGC2 R/W 0x00000000 Deep Sleep Mode Clock Gating Control Register 2 112 0x144 DSLPCLKCFG R/W 0x0780.0000 Deep Sleep Clock Configuration 81 6.4 Register Descriptions All addresses given are relative to the System Control base address of 0x400F.E000. March 17, 2008 65 Preliminary LM3S8933 Microcontroller Register 1: Device Identification 0 (DID0), offset 0x000 This register identifies the version of the device. Device Identification 0 (DID0) Base 0x400F.E000 Offset 0x000 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved VER reserved CLASS Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MAJOR MINOR Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset - - - - - - - - - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 DID0 Version This field defines the DID0 register format version. The version number is numeric. The value of the VER field is encoded as follows: Value Description 0x1 Second version of the DID0 register format. 30:28 VER RO 0x1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:24 reserved RO 0x0 Device Class The CLASS field value identifies the internal design from which all mask sets are generated for all devices in a particular product line. The CLASS field value is changed for new product lines, for changes in fab process (for example, a remap or shrink), or any case where the MAJOR or MINOR fields require differentiation from prior devices. The value of the CLASS field is encoded as follows (all other encodings are reserved): Value Description 0x1 Stellaris® Fury-class devices. 23:16 CLASS RO 0x1 66 March 17, 2008 Preliminary System Control Bit/Field Name Type Reset Description Major Revision This field specifies the major revision number of the device. The major revision reflects changes to base layers of the design. The major revision number is indicated in the part number as a letter (A for first revision, B for second, and so on). This field is encoded as follows: Value Description 0x0 Revision A (initial device) 0x1 Revision B (first base layer revision) 0x2 Revision C (second base layer revision) and so on. 15:8 MAJOR RO - Minor Revision This field specifies the minor revision number of the device. The minor revision reflects changes to the metal layers of the design. The MINOR field value is reset when the MAJOR field is changed. This field is numeric and is encoded as follows: Value Description 0x0 Initial device, or a major revision update. 0x1 First metal layer change. 0x2 Second metal layer change. and so on. 7:0 MINOR RO - March 17, 2008 67 Preliminary LM3S8933 Microcontroller Register 2: Brown-Out Reset Control (PBORCTL), offset 0x030 This register is responsible for controlling reset conditions after initial power-on reset. Brown-Out Reset Control (PBORCTL) Base 0x400F.E000 Offset 0x030 Type R/W, reset 0x0000.7FFD 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved BORIOR reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO R/W RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:2 reserved RO 0x0 BOR Interrupt or Reset This bit controls how a BOR event is signaled to the controller. If set, a reset is signaled. Otherwise, an interrupt is signaled. 1 BORIOR R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 68 March 17, 2008 Preliminary System Control Register 3: LDO Power Control (LDOPCTL), offset 0x034 The VADJ field in this register adjusts the on-chip output voltage (VOUT). LDO Power Control (LDOPCTL) Base 0x400F.E000 Offset 0x034 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved VADJ Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0 LDO Output Voltage This field sets the on-chip output voltage. The programming values for the VADJ field are provided below. Value VOUT (V) 0x00 2.50 0x01 2.45 0x02 2.40 0x03 2.35 0x04 2.30 0x05 2.25 0x06-0x3F Reserved 0x1B 2.75 0x1C 2.70 0x1D 2.65 0x1E 2.60 0x1F 2.55 5:0 VADJ R/W 0x0 March 17, 2008 69 Preliminary LM3S8933 Microcontroller Register 4: Raw Interrupt Status (RIS), offset 0x050 Central location for system control raw interrupts. These are set and cleared by hardware. Raw Interrupt Status (RIS) Base 0x400F.E000 Offset 0x050 Type RO, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLRIS reserved BORRIS reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Raw Interrupt Status This bit is set when the PLL TREADY Timer asserts. 6 PLLLRIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 Brown-Out Reset Raw Interrupt Status This bit is the raw interrupt status for any brown-out conditions. If set, a brown-out condition is currently active. This is an unregistered signal from the brown-out detection circuit. An interrupt is reported if the BORIM bit in the IMC register is set and the BORIOR bit in the PBORCTL register is cleared. 1 BORRIS RO 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 70 March 17, 2008 Preliminary System Control Register 5: Interrupt Mask Control (IMC), offset 0x054 Central location for system control interrupt masks. Interrupt Mask Control (IMC) Base 0x400F.E000 Offset 0x054 Type R/W, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLIM reserved BORIM reserved Type RO RO RO RO RO RO RO RO RO R/W RO RO RO RO R/W RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Interrupt Mask This bit specifies whether a current limit detection is promoted to a controller interrupt. If set, an interrupt is generated if PLLLRIS in RIS is set; otherwise, an interrupt is not generated. 6 PLLLIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 Brown-Out Reset Interrupt Mask This bit specifies whether a brown-out condition is promoted to a controller interrupt. If set, an interrupt is generated if BORRIS is set; otherwise, an interrupt is not generated. 1 BORIM R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 March 17, 2008 71 Preliminary LM3S8933 Microcontroller Register 6: Masked Interrupt Status and Clear (MISC), offset 0x058 Central location for system control result of RIS AND IMC to generate an interrupt to the controller. All of the bits are R/W1C and this action also clears the corresponding raw interrupt bit in the RIS register (see page 70). Masked Interrupt Status and Clear (MISC) Base 0x400F.E000 Offset 0x058 Type R/W1C, reset 0x0000.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PLLLMIS reserved BORMIS reserved Type RO RO RO RO RO RO RO RO RO R/W1C RO RO RO RO R/W1C RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:7 reserved RO 0 PLL Lock Masked Interrupt Status This bit is set when the PLL TREADY timer asserts. The interrupt is cleared by writing a 1 to this bit. 6 PLLLMIS R/W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:2 reserved RO 0 BOR Masked Interrupt Status The BORMIS is simply the BORRIS ANDed with the mask value, BORIM. 1 BORMIS R/W1C 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 0 reserved RO 0 72 March 17, 2008 Preliminary System Control Register 7: Reset Cause (RESC), offset 0x05C This register is set with the reset cause after reset. The bits in this register are sticky and maintain their state across multiple reset sequences, except when an external reset is the cause, and then all the other bits in the RESC register are cleared. Reset Cause (RESC) Base 0x400F.E000 Offset 0x05C Type R/W, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved LDO SW WDT BOR POR EXT Type RO RO RO RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W Reset 0 0 0 0 0 0 0 0 0 0 - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:6 reserved RO 0 LDO Reset When set, indicates the LDO circuit has lost regulation and has generated a reset event. 5 LDO R/W - Software Reset When set, indicates a software reset is the cause of the reset event. 4 SW R/W - Watchdog Timer Reset When set, indicates a watchdog reset is the cause of the reset event. 3 WDT R/W - Brown-Out Reset When set, indicates a brown-out reset is the cause of the reset event. 2 BOR R/W - Power-On Reset When set, indicates a power-on reset is the cause of the reset event. 1 POR R/W - External Reset When set, indicates an external reset (RST assertion) is the cause of the reset event. 0 EXT R/W - March 17, 2008 73 Preliminary LM3S8933 Microcontroller Register 8: Run-Mode Clock Configuration (RCC), offset 0x060 This register is defined to provide source control and frequency speed. Run-Mode Clock Configuration (RCC) Base 0x400F.E000 Offset 0x060 Type R/W, reset 0x0780.3AD1 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved ACG SYSDIV USESYSDIV reserved Type RO RO RO RO R/W R/W R/W R/W R/W R/W RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWRDN reserved BYPASS reserved XTAL OSCSRC reserved IOSCDIS MOSCDIS Type RO RO R/W RO R/W RO R/W R/W R/W R/W R/W R/W RO RO R/W R/W Reset 0 0 1 1 1 0 1 0 1 1 0 1 0 0 0 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:28 reserved RO 0x0 Auto Clock Gating This bit specifies whether the system uses the Sleep-Mode Clock Gating Control (SCGCn) registers and Deep-Sleep-Mode Clock Gating Control (DCGCn) registers if the controller enters a Sleep or Deep-Sleep mode (respectively). If set, the SCGCn or DCGCn registers are used to control the clocks distributed to the peripherals when the controller is in a sleep mode. Otherwise, the Run-Mode Clock Gating Control (RCGCn) registers are used when the controller enters a sleep mode. The RCGCn registers are always used to control the clocks in Run mode. This allows peripherals to consume less power when the controller is in a sleep mode and the peripheral is unused. 27 ACG R/W 0 74 March 17, 2008 Preliminary System Control Bit/Field Name Type Reset Description System Clock Divisor Specifies which divisor is used to generate the system clock from the PLL output. The PLL VCO frequency is 400 MHz. Value Divisor (BYPASS=1) Frequency (BYPASS=0) 0x0 reserved reserved 0x1 /2 reserved 0x2 /3 reserved 0x3 /4 50 MHz 0x4 /5 40 MHz 0x5 /6 33.33 MHz 0x6 /7 28.57 MHz 0x7 /8 25 MHz 0x8 /9 22.22 MHz 0x9 /10 20 MHz 0xA /11 18.18 MHz 0xB /12 16.67 MHz 0xC /13 15.38 MHz 0xD /14 14.29 MHz 0xE /15 13.33 MHz 0xF /16 12.5 MHz (default) When reading the Run-Mode Clock Configuration (RCC) register (see page 74), the SYSDIV value is MINSYSDIV if a lower divider was requested and the PLL is being used. This lower value is allowed to divide a non-PLL source. 26:23 SYSDIV R/W 0xF Enable System Clock Divider Use the system clock divider as the source for the system clock. The system clock divider is forced to be used when the PLL is selected as the source. 22 USESYSDIV R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 21:14 reserved RO 0 PLL Power Down This bit connects to the PLL PWRDN input. The reset value of 1 powers down the PLL. 13 PWRDN R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12 reserved RO 1 March 17, 2008 75 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description PLL Bypass Chooses whether the system clock is derived from the PLL output or the OSC source. If set, the clock that drives the system is the OSC source. Otherwise, the clock that drives the system is the PLL output clock divided by the system divider. Note: The ADC must be clocked from the PLL or directly from a 14-MHz to 18-MHz clock source to operate properly. While the ADC works in a 14-18 MHz range, to maintain a 1 M sample/second rate, the ADC must be provided a 16-MHz clock source. 11 BYPASS R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 10 reserved RO 0 Crystal Value This field specifies the crystal value attached to the main oscillator. The encoding for this field is provided below. Crystal Frequency (MHz) Using the PLL Crystal Frequency (MHz) Not Using the PLL Value 0x0 1.000 reserved 0x1 1.8432 reserved 0x2 2.000 reserved 0x3 2.4576 reserved 0x4 3.579545 MHz 0x5 3.6864 MHz 0x6 4 MHz 0x7 4.096 MHz 0x8 4.9152 MHz 0x9 5 MHz 0xA 5.12 MHz 0xB 6 MHz (reset value) 0xC 6.144 MHz 0xD 7.3728 MHz 0xE 8 MHz 0xF 8.192 MHz 9:6 XTAL R/W 0xB Oscillator Source Picks among the four input sources for the OSC. The values are: Value Input Source 0x0 Main oscillator 0x1 Internal oscillator (default) 0x2 Internal oscillator / 4 (this is necessary if used as input to PLL) 0x3 reserved 5:4 OSCSRC R/W 0x1 76 March 17, 2008 Preliminary System Control Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0x0 Internal Oscillator Disable 0: Internal oscillator (IOSC) is enabled. 1: Internal oscillator is disabled. 1 IOSCDIS R/W 0 Main Oscillator Disable 0: Main oscillator is enabled . 1: Main oscillator is disabled (default). 0 MOSCDIS R/W 1 March 17, 2008 77 Preliminary LM3S8933 Microcontroller Register 9: XTAL to PLL Translation (PLLCFG), offset 0x064 This register provides a means of translating external crystal frequencies into the appropriate PLL settings. This register is initialized during the reset sequence and updated anytime that the XTAL field changes in the Run-Mode Clock Configuration (RCC) register (see page 74). The PLL frequency is calculated using the PLLCFG field values, as follows: PLLFreq = OSCFreq * F / (R + 1) XTAL to PLL Translation (PLLCFG) Base 0x400F.E000 Offset 0x064 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved F R Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 - - - - - - - - - - - - - - Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:14 reserved RO 0x0 PLL F Value This field specifies the value supplied to the PLL’s F input. 13:5 F RO - PLL R Value This field specifies the value supplied to the PLL’s R input. 4:0 R RO - 78 March 17, 2008 Preliminary System Control Register 10: Run-Mode Clock Configuration 2 (RCC2), offset 0x070 This register overrides the RCC equivalent register fields when the USERCC2 bit is set. This allows RCC2 to be used to extend the capabilities, while also providing a means to be backward-compatible to previous parts. The fields within the RCC2 register occupy the same bit positions as they do within the RCC register as LSB-justified. The SYSDIV2 field is wider so that additional larger divisors are possible. This allows a lower system clock frequency for improved Deep Sleep power consumption. Run-Mode Clock Configuration 2 (RCC2) Base 0x400F.E000 Offset 0x070 Type R/W, reset 0x0780.2800 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 USERCC2 reserved SYSDIV2 reserved Type R/W RO RO R/W R/W R/W R/W R/W R/W RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved PWRDN2 reserved BYPASS2 reserved OSCSRC2 reserved Type RO RO R/W RO R/W RO RO RO RO R/W R/W R/W RO RO RO RO Reset 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Use RCC2 When set, overrides the RCC register fields. 31 USERCC2 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 30:29 reserved RO 0x0 System Clock Divisor Specifies which divisor is used to generate the system clock from the PLL output. The PLL VCO frequency is 400 MHz. This field is wider than the RCC register SYSDIV field in order to provide additional divisor values. This permits the system clock to be run at much lower frequencies during Deep Sleep mode. For example, where the RCC register SYSDIV encoding of 1111 provides /16, the RCC2 register SYSDIV2 encoding of 111111 provides /64. 28:23 SYSDIV2 R/W 0x0F Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 22:14 reserved RO 0x0 Power-Down PLL When set, powers down the PLL. 13 PWRDN2 R/W 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12 reserved RO 0 Bypass PLL When set, bypasses the PLL for the clock source. 11 BYPASS2 R/W 1 March 17, 2008 79 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 10:7 reserved RO 0x0 System Clock Source Value Description 0x0 Main oscillator (MOSC) 0x1 Internal oscillator (IOSC) 0x2 Internal oscillator / 4 0x3 30 kHz internal oscillator 0x7 32 kHz external oscillator 6:4 OSCSRC2 R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0 80 March 17, 2008 Preliminary System Control Register 11: Deep Sleep Clock Configuration (DSLPCLKCFG), offset 0x144 This register provides configuration information for the hardware control of Deep Sleep Mode. Deep Sleep Clock Configuration (DSLPCLKCFG) Base 0x400F.E000 Offset 0x144 Type R/W, reset 0x0780.0000 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved DSDIVORIDE reserved Type RO RO RO R/W R/W R/W R/W R/W R/W RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved DSOSCSRC reserved Type RO RO RO RO RO RO RO RO RO R/W R/W R/W RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:29 reserved RO 0x0 Divider Field Override 6-bit system divider field to override when Deep-Sleep occurs with PLL running. 28:23 DSDIVORIDE R/W 0x0F Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 22:7 reserved RO 0x0 Clock Source When set, forces IOSC to be clock source during Deep Sleep mode. Value Name Description 0x0 NOORIDE No override to the oscillator clock source is done 0x1 IOSC Use internal 12 MHz oscillator as source 0x3 30kHz Use 30 kHz internal oscillator 0x7 32kHz Use 32 kHz external oscillator 6:4 DSOSCSRC R/W 0x0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:0 reserved RO 0x0 March 17, 2008 81 Preliminary LM3S8933 Microcontroller Register 12: Device Identification 1 (DID1), offset 0x004 This register identifies the device family, part number, temperature range, pin count, and package type. Device Identification 1 (DID1) Base 0x400F.E000 Offset 0x004 Type RO, reset - 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 VER FAM PARTNO Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 0 1 0 0 0 1 1 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 PINCOUNT reserved TEMP PKG ROHS QUAL Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 0 0 0 0 0 0 - - - - - 1 - - Bit/Field Name Type Reset Description DID1 Version This field defines the DID1 register format version. The version number is numeric. The value of the VER field is encoded as follows (all other encodings are reserved): Value Description 0x1 Second version of the DID1 register format. 31:28 VER RO 0x1 Family This field provides the family identification of the device within the Luminary Micro product portfolio. The value is encoded as follows (all other encodings are reserved): Value Description Stellaris family of microcontollers, that is, all devices with external part numbers starting with LM3S. 0x0 27:24 FAM RO 0x0 Part Number This field provides the part number of the device within the family. The value is encoded as follows (all other encodings are reserved): Value Description 0x8C LM3S8933 23:16 PARTNO RO 0x8C Package Pin Count This field specifies the number of pins on the device package. The value is encoded as follows (all other encodings are reserved): Value Description 0x2 100-pin or 108-ball package 15:13 PINCOUNT RO 0x2 82 March 17, 2008 Preliminary System Control Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 12:8 reserved RO 0 Temperature Range This field specifies the temperature rating of the device. The value is encoded as follows (all other encodings are reserved): Value Description 0x0 Commercial temperature range (0°C to 70°C) 0x1 Industrial temperature range (-40°C to 85°C) 0x2 Extended temperature range (-40°C to 105°C) 7:5 TEMP RO - Package Type This field specifies the package type. The value is encoded as follows (all other encodings are reserved): Value Description 0x0 SOIC package 0x1 LQFP package 0x2 BGA package 4:3 PKG RO - RoHS-Compliance This bit specifies whether the device is RoHS-compliant. A 1 indicates the part is RoHS-compliant. 2 ROHS RO 1 Qualification Status This field specifies the qualification status of the device. The value is encoded as follows (all other encodings are reserved): Value Description 0x0 Engineering Sample (unqualified) 0x1 Pilot Production (unqualified) 0x2 Fully Qualified 1:0 QUAL RO - March 17, 2008 83 Preliminary LM3S8933 Microcontroller Register 13: Device Capabilities 0 (DC0), offset 0x008 This register is predefined by the part and can be used to verify features. Device Capabilities 0 (DC0) Base 0x400F.E000 Offset 0x008 Type RO, reset 0x00FF.007F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 SRAMSZ Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 FLASHSZ Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description SRAM Size Indicates the size of the on-chip SRAM memory. Value Description 0x00FF 64 KB of SRAM 31:16 SRAMSZ RO 0x00FF Flash Size Indicates the size of the on-chip flash memory. Value Description 0x007F 256 KB of Flash 15:0 FLASHSZ RO 0x007F 84 March 17, 2008 Preliminary System Control Register 14: Device Capabilities 1 (DC1), offset 0x010 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: CANs, PWM, ADC, Watchdog timer, Hibernation module, and debug capabilities. This register also indicates the maximum clock frequency and maximum ADC sample rate. The format of this register is consistent with the RCGC0, SCGC0, and DCGC0 clock control registers and the SRCR0 software reset control register. Device Capabilities 1 (DC1) Base 0x400F.E000 Offset 0x010 Type RO, reset 0x0101.33FF 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CAN0 reserved ADC Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MINSYSDIV MAXADCSPD MPU HIB TEMPSNS PLL WDT SWO SWD JTAG Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 1 1 0 0 1 1 1 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:25 reserved RO 0 CAN Module 0 Present When set, indicates that CAN unit 0 is present. 24 CAN0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:17 reserved RO 0 ADC Module Present When set, indicates that the ADC module is present. 16 ADC RO 1 System Clock Divider Minimum 4-bit divider value for system clock. The reset value is hardware-dependent. See the RCC register for how to change the system clock divisor using the SYSDIV bit. Value Description 0x3 Specifies a 50-MHz CPU clock with a PLL divider of 4. 15:12 MINSYSDIV RO 0x3 Max ADC Speed Indicates the maximum rate at which the ADC samples data. Value Description 0x3 1M samples/second 11:8 MAXADCSPD RO 0x3 March 17, 2008 85 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description MPU Present When set, indicates that the Cortex-M3 Memory Protection Unit (MPU) module is present. See the ARM Cortex-M3 Technical Reference Manual for details on the MPU. 7 MPU RO 1 Hibernation Module Present When set, indicates that the Hibernation module is present. 6 HIB RO 1 Temp Sensor Present When set, indicates that the on-chip temperature sensor is present. 5 TEMPSNS RO 1 PLL Present When set, indicates that the on-chip Phase Locked Loop (PLL) is present. 4 PLL RO 1 Watchdog Timer Present When set, indicates that a watchdog timer is present. 3 WDT RO 1 SWO Trace Port Present When set, indicates that the Serial Wire Output (SWO) trace port is present. 2 SWO RO 1 SWD Present When set, indicates that the Serial Wire Debugger (SWD) is present. 1 SWD RO 1 JTAG Present When set, indicates that the JTAG debugger interface is present. 0 JTAG RO 1 86 March 17, 2008 Preliminary System Control Register 15: Device Capabilities 2 (DC2), offset 0x014 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Analog Comparators, General-Purpose Timers, I2Cs, QEIs, SSIs, and UARTs. The format of this register is consistent with the RCGC1, SCGC1, and DCGC1 clock control registers and the SRCR1 software reset control register. Device Capabilities 2 (DC2) Base 0x400F.E000 Offset 0x014 Type RO, reset 0x070F.1013 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved COMP2 COMP1 COMP0 reserved TIMER3 TIMER2 TIMER1 TIMER0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved I2C0 reserved SSI0 reserved UART1 UART0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 1 0 0 0 0 0 0 0 1 0 0 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:27 reserved RO 0 Analog Comparator 2 Present When set, indicates that analog comparator 2 is present. 26 COMP2 RO 1 Analog Comparator 1 Present When set, indicates that analog comparator 1 is present. 25 COMP1 RO 1 Analog Comparator 0 Present When set, indicates that analog comparator 0 is present. 24 COMP0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:20 reserved RO 0 Timer 3 Present When set, indicates that General-Purpose Timer module 3 is present. 19 TIMER3 RO 1 Timer 2 Present When set, indicates that General-Purpose Timer module 2 is present. 18 TIMER2 RO 1 Timer 1 Present When set, indicates that General-Purpose Timer module 1 is present. 17 TIMER1 RO 1 Timer 0 Present When set, indicates that General-Purpose Timer module 0 is present. 16 TIMER0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:13 reserved RO 0 March 17, 2008 87 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description I2C Module 0 Present When set, indicates that I2C module 0 is present. 12 I2C0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 11:5 reserved RO 0 SSI0 Present When set, indicates that SSI module 0 is present. 4 SSI0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 3:2 reserved RO 0 UART1 Present When set, indicates that UART module 1 is present. 1 UART1 RO 1 UART0 Present When set, indicates that UART module 0 is present. 0 UART0 RO 1 88 March 17, 2008 Preliminary System Control Register 16: Device Capabilities 3 (DC3), offset 0x018 This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Analog Comparator I/Os, CCP I/Os, ADC I/Os, and PWM I/Os. Device Capabilities 3 (DC3) Base 0x400F.E000 Offset 0x018 Type RO, reset 0x0F0F.3FC0 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CCP3 CCP2 CCP1 CCP0 reserved ADC3 ADC2 ADC1 ADC0 Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved C2PLUS C2MINUS C1O C1PLUS C1MINUS C0O C0PLUS C0MINUS reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:28 reserved RO 0 CCP3 Pin Present When set, indicates that Capture/Compare/PWM pin 3 is present. 27 CCP3 RO 1 CCP2 Pin Present When set, indicates that Capture/Compare/PWM pin 2 is present. 26 CCP2 RO 1 CCP1 Pin Present When set, indicates that Capture/Compare/PWM pin 1 is present. 25 CCP1 RO 1 CCP0 Pin Present When set, indicates that Capture/Compare/PWM pin 0 is present. 24 CCP0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:20 reserved RO 0 ADC3 Pin Present When set, indicates that ADC pin 3 is present. 19 ADC3 RO 1 ADC2 Pin Present When set, indicates that ADC pin 2 is present. 18 ADC2 RO 1 ADC1 Pin Present When set, indicates that ADC pin 1 is present. 17 ADC1 RO 1 ADC0 Pin Present When set, indicates that ADC pin 0 is present. 16 ADC0 RO 1 March 17, 2008 89 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:14 reserved RO 0 C2+ Pin Present When set, indicates that the analog comparator 2 (+) input pin is present. 13 C2PLUS RO 1 C2- Pin Present When set, indicates that the analog comparator 2 (-) input pin is present. 12 C2MINUS RO 1 C1o Pin Present When set, indicates that the analog comparator 1 output pin is present. 11 C1O RO 1 C1+ Pin Present When set, indicates that the analog comparator 1 (+) input pin is present. 10 C1PLUS RO 1 C1- Pin Present When set, indicates that the analog comparator 1 (-) input pin is present. 9 C1MINUS RO 1 C0o Pin Present When set, indicates that the analog comparator 0 output pin is present. 8 C0O RO 1 C0+ Pin Present When set, indicates that the analog comparator 0 (+) input pin is present. 7 C0PLUS RO 1 C0- Pin Present When set, indicates that the analog comparator 0 (-) input pin is present. 6 C0MINUS RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:0 reserved RO 0 90 March 17, 2008 Preliminary System Control Register 17: Device Capabilities 4 (DC4), offset 0x01C This register provides a list of features available in the system. The Stellaris family uses this register format to indicate the availability of the following family features in the specific device: Ethernet MAC and PHY, GPIOs, and CCP I/Os. The format of this register is consistent with the RCGC2, SCGC2, and DCGC2 clock control registers and the SRCR2 software reset control register. Device Capabilities 4 (DC4) Base 0x400F.E000 Offset 0x01C Type RO, reset 0x5100.007F 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved EPHY0 reserved EMAC0 reserved E1588 reserved Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved GPIOG GPIOF GPIOE GPIOD GPIOC GPIOB GPIOA Type RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO Reset 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31 reserved RO 0 Ethernet PHY0 Present When set, indicates that Ethernet PHY module 0 is present. 30 EPHY0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 29 reserved RO 0 Ethernet MAC0 Present When set, indicates that Ethernet MAC module 0 is present. 28 EMAC0 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 27:25 reserved RO 0 1588 Capable When set, indicates that that EMAC0 is 1588-capable. 24 E1588 RO 1 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:7 reserved RO 0 GPIO Port G Present When set, indicates that GPIO Port G is present. 6 GPIOG RO 1 GPIO Port F Present When set, indicates that GPIO Port F is present. 5 GPIOF RO 1 GPIO Port E Present When set, indicates that GPIO Port E is present. 4 GPIOE RO 1 March 17, 2008 91 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description GPIO Port D Present When set, indicates that GPIO Port D is present. 3 GPIOD RO 1 GPIO Port C Present When set, indicates that GPIO Port C is present. 2 GPIOC RO 1 GPIO Port B Present When set, indicates that GPIO Port B is present. 1 GPIOB RO 1 GPIO Port A Present When set, indicates that GPIO Port A is present. 0 GPIOA RO 1 92 March 17, 2008 Preliminary System Control Register 18: Run Mode Clock Gating Control Register 0 (RCGC0), offset 0x100 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Run Mode Clock Gating Control Register 0 (RCGC0) Base 0x400F.E000 Offset 0x100 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CAN0 reserved ADC Type RO RO RO RO RO RO RO R/W RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:25 reserved RO 0 CAN0 Clock Gating Control This bit controls the clock gating for CAN unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 24 CAN0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 March 17, 2008 93 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description ADC Sample Speed This field sets the rate at which the ADC samples data. You cannot set the rate higher than the maximum rate. You can set the sample rate by setting the MAXADCSPD bit as follows: Value Description 0x3 1M samples/second 0x2 500K samples/second 0x1 250K samples/second 0x0 125K samples/second 11:8 MAXADCSPD R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 HIB Clock Gating Control This bit controls the clock gating for the Hibernation module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Clock Gating Control This bit controls the clock gating for the WDT module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 94 March 17, 2008 Preliminary System Control Register 19: Sleep Mode Clock Gating Control Register 0 (SCGC0), offset 0x110 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Sleep Mode Clock Gating Control Register 0 (SCGC0) Base 0x400F.E000 Offset 0x110 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CAN0 reserved ADC Type RO RO RO RO RO RO RO R/W RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:25 reserved RO 0 CAN0 Clock Gating Control This bit controls the clock gating for CAN unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 24 CAN0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 March 17, 2008 95 Preliminary LM3S8933 Microcontroller Bit/Field Name Type Reset Description ADC Sample Speed This field sets the rate at which the ADC samples data. You cannot set the rate higher than the maximum rate. You can set the sample rate by setting the MAXADCSPD bit as follows: Value Description 0x3 1M samples/second 0x2 500K samples/second 0x1 250K samples/second 0x0 125K samples/second 11:8 MAXADCSPD R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 7 reserved RO 0 HIB Clock Gating Control This bit controls the clock gating for the Hibernation module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 6 HIB R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 5:4 reserved RO 0 WDT Clock Gating Control This bit controls the clock gating for the WDT module. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 3 WDT R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 2:0 reserved RO 0 96 March 17, 2008 Preliminary System Control Register 20: Deep Sleep Mode Clock Gating Control Register 0 (DCGC0), offset 0x120 This register controls the clock gating logic. Each bit controls a clock enable for a given interface, function, or unit. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled (saving power). If the unit is unclocked, reads or writes to the unit will generate a bus fault. The reset state of these bits is 0 (unclocked) unless otherwise noted, so that all functional units are disabled. It is the responsibility of software to enable the ports necessary for the application. Note that these registers may contain more bits than there are interfaces, functions, or units to control. This is to assure reasonable code compatibility with other family and future parts. RCGC0 is the clock configuration register for running operation, SCGC0 for Sleep operation, and DCGC0 for Deep-Sleep operation. Setting the ACG bit in the Run-Mode Clock Configuration (RCC) register specifies that the system uses sleep modes. Deep Sleep Mode Clock Gating Control Register 0 (DCGC0) Base 0x400F.E000 Offset 0x120 Type R/W, reset 0x00000040 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 reserved CAN0 reserved ADC Type RO RO RO RO RO RO RO R/W RO RO RO RO RO RO RO R/W Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 reserved MAXADCSPD reserved HIB reserved WDT reserved Type RO RO RO RO R/W R/W R/W R/W RO R/W RO RO R/W RO RO RO Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit/Field Name Type Reset Description Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 31:25 reserved RO 0 CAN0 Clock Gating Control This bit controls the clock gating for CAN unit 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. 24 CAN0 R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 23:17 reserved RO 0 ADC0 Clock Gating Control This bit controls the clock gating for SAR ADC module 0. If set, the unit receives a clock and functions. Otherwise, the unit is unclocked and disabled. If the unit is unclocked, a read or write to the unit generates a bus fault. 16 ADC R/W 0 Software should not rely on the value of a reserved bit. To provide compatibility with future products, the value of a reserved bit should be preserved across a read-modify-write operation. 15:12 reserved RO 0 March 17, 2008 97 Preliminary