LM3S812 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
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TM4C123GH6PM ACTIVE 32-bit Arm Cortex-M4F based MCU with 80 -MHz, 256 -KB Flash, 32 -KB RAM, 2 CAN, RTC, USB, 64-Pin LQF The product is an ARM® Cortex™-M4 with comparable peripherals and higher performance.
TM4C1294NCPDT ACTIVE 32-bit Arm Cortex-M4F based MCU with 120-MHZ, 1-MB flash, 256-KB RAM, USB, ENET MAC+PHY ; The product is an ARM® Cortex™-M4 with broader peripherals and higher performance.

Product details

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  • 32-bit ARM® Cortex™-M3 50-MHz processor core with System Timer (SysTick), integrated Nested Vectored Interrupt Controller (NVIC), Memory Protection Unit (MPU), and Thumb-2 instruction set

  • Full-featured debug solution with debug access via JTAG and Serial Wire interfaces, and IEEE 1149.1-1990 compliant Test Access Port (TAP) controller

  • 64 KB single-cycle flash and 8 KB single-cycle SRAM

  • 7-34 GPIOs (depending on configuration) with programmable control for GPIO interrupts and pad configuration

  • ARM FiRM-compliant Watchdog Timer ; plus three General-Purpose Timer Modules (GPTM), each of which provides two 16-bit timers/counters and can be configured to operate independently

  • 10-bit Analog-to-Digital Converter (ADC) with two analog input channels and a sample rate of 250 thousand samples/second

  • Two fully programmable 16C550-type UARTs

  • Synchronous Serial Interface (SSI), supporting operation for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces

  • Inter-Integrated Circuit (I2C) Interface, providing Standard (100 Kbps) and Fast (400 Kbps) transmission and support for sending and receiving data as either a master or a slave

  • One integrated analog comparator configurable for output to initiate an ADC sample sequence, drive an output pin or generate an interrupt

  • One PWM generator blocks, each with one 16-bit counter, two PWM comparators, a PWM signal generator, a dead-band generator, and an interrupt/ADC-trigger selector

  • Industrial and extended temperature RoHS-compliant 48-pin LQFP and 48-pin QFN package

  • 32-bit ARM® Cortex™-M3 50-MHz processor core with System Timer (SysTick), integrated Nested Vectored Interrupt Controller (NVIC), Memory Protection Unit (MPU), and Thumb-2 instruction set

  • Full-featured debug solution with debug access via JTAG and Serial Wire interfaces, and IEEE 1149.1-1990 compliant Test Access Port (TAP) controller

  • 64 KB single-cycle flash and 8 KB single-cycle SRAM

  • 7-34 GPIOs (depending on configuration) with programmable control for GPIO interrupts and pad configuration

  • ARM FiRM-compliant Watchdog Timer ; plus three General-Purpose Timer Modules (GPTM), each of which provides two 16-bit timers/counters and can be configured to operate independently

  • 10-bit Analog-to-Digital Converter (ADC) with two analog input channels and a sample rate of 250 thousand samples/second

  • Two fully programmable 16C550-type UARTs

  • Synchronous Serial Interface (SSI), supporting operation for Freescale SPI, MICROWIRE, or Texas Instruments synchronous serial interfaces

  • Inter-Integrated Circuit (I2C) Interface, providing Standard (100 Kbps) and Fast (400 Kbps) transmission and support for sending and receiving data as either a master or a slave

  • One integrated analog comparator configurable for output to initiate an ADC sample sequence, drive an output pin or generate an interrupt

  • One PWM generator blocks, each with one 16-bit counter, two PWM comparators, a PWM signal generator, a dead-band generator, and an interrupt/ADC-trigger selector

  • Industrial and extended temperature RoHS-compliant 48-pin LQFP and 48-pin QFN package

The Stellaris® LM3S812 microcontroller is based on the ARM® Cortex™-M3 controller core operating at up to 50 MHz, with 64 kB flash and 8 kB SRAM. The LM3S812 also features real-time industrial connectivity, with an SSI / SPI controller, an I2C interface, and 2 UARTs. The LM3S812 microcontroller also features advanced motion control features, including 2 motion-control PWM outputs with dead-band and 1 fault protection inputs for low-latency shutdown. The microcontroller also features intelligent analog capability, including 1 analog comparators and 2 channels of highly accurate 10-bit analog-to-digital conversion - with the ability to sample at speeds of 250K samples per second. Finally, the LM3S812 microcontroller provides a 24-bit systick timer, 3 32-bit or 6 16-bit general-purpose timers, a watchdog timer, a low drop-out voltage regulator so that only one supply voltage is required, brown-out reset, power-on reset controller, and up to 34 GPIOs.

The Stellaris® LM3S812 microcontroller is based on the ARM® Cortex™-M3 controller core operating at up to 50 MHz, with 64 kB flash and 8 kB SRAM. The LM3S812 also features real-time industrial connectivity, with an SSI / SPI controller, an I2C interface, and 2 UARTs. The LM3S812 microcontroller also features advanced motion control features, including 2 motion-control PWM outputs with dead-band and 1 fault protection inputs for low-latency shutdown. The microcontroller also features intelligent analog capability, including 1 analog comparators and 2 channels of highly accurate 10-bit analog-to-digital conversion - with the ability to sample at speeds of 250K samples per second. Finally, the LM3S812 microcontroller provides a 24-bit systick timer, 3 32-bit or 6 16-bit general-purpose timers, a watchdog timer, a low drop-out voltage regulator so that only one supply voltage is required, brown-out reset, power-on reset controller, and up to 34 GPIOs.

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Technical documentation

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Type Title Date
* Data sheet Stellaris LM3S812 Microcontroller Data Sheet datasheet (Rev. I) 15 Jul 2014
* Errata Stellaris LM3S Sandstorm-, Fury-, and DustDevil-Class Microcontrollers Errata 26 Jun 2014
* Errata ARM Cortex-M3 Errata (r1p0) 24 Oct 2008
Technical article 5 ways high-performance MCUs are reshaping the industry 12 Jul 2021
User guide SYS/BIOS (TI-RTOS Kernel) User's Guide (Rev. V) 01 Jun 2020
User guide TI-RTOS 2.20 User's Guide (Rev. M) 17 Jun 2016
User guide TI-RTOS 2.16 User's Guide (Rev. L) 22 Feb 2016
Application note Differences Among Stellaris® LM3S and Tiva™ C Series TM4C123x MCUs (Rev. E) 24 Sep 2013
User guide Stellaris Boot Loader User's Guide (SW-BOOTLDR-UG) (Rev. P) 19 Apr 2013
User guide Stellaris Graphics Library User's Guide (SW-GRL-UG) (Rev. P) 19 Apr 2013
User guide Stellaris Peripheral Driver Library User's Guide (SW-DRL-UG) (Rev. P) 19 Apr 2013
User guide StellarisWare Release Notes (SW-RLN) (Rev. Q) 19 Apr 2013
Application note System Design Guidelines for Stellaris® Microcontrollers   (Rev. B) 04 Feb 2013
Application note ADC Oversampling Techniques for Stellaris Microcontrollers (AN01239) (Rev. A) 08 Jan 2013
Application note Stellaris® LM3S ADC Calibration (AN01282) (Rev. C) 01 Nov 2012
Application note Using Execute, Write/Erase Flash Protection on Stellaris MCUs Using CCS (Rev. A) 15 Aug 2012
User guide StellarisWare Release Notes (SW-RLN) (Rev. N) 11 Dec 2011
User guide Cortex-M3/M4F Instruction Set Technical User's Manual (Rev. A) 23 Nov 2011
More literature Stellaris Sandstorm-Class Product Change Notice 26 Jan 2011
White paper Serial Wire Debug—Ideal for Microcontrollers 09 Sep 2010
More literature Stellaris Product Change Notice (PCN), Sept 2009 07 Sep 2009
Application note Clock Fail Detection for Stellaris LM3SX00 MCUs (AN01278) 07 Jul 2009
Application note Implementing RS-232 Flow Control on a Stellaris Microcontroller (AN01255) 07 Jul 2009
Application note Optimizing Code Performance and Size for Stellaris Microcontrollers (AN01265) 07 Jul 2009
Application note Programming the On-Chip Flash Memory in a Stellaris Microcontroller (AN01237) 07 Jul 2009
Application note Software UART for Stellaris Microcontrollers (AN01270) 07 Jul 2009
Application note Using Stellaris MCUs Internal Flash Memory to Emulate EEPROM (AN01267) 07 Jul 2009
Application note Using a 9-bit Software UART with Stellaris (AN01280) 07 Jul 2009
Application note Using the Stellaris Microcontroller Analog-to-Digital Converter (AN01247) 07 Jul 2009
Application note Using the Stellaris Serial Flash Loader (AN01242) 07 Jul 2009
User guide Stellaris Peripheral Driver Library User's Guide (Deprecated Version) 29 Sep 2008
More literature LM3S812 RevC Product Change Notice (PCN), Dec 2007 20 Dec 2007
More literature LM3S812 RevC2 Product Change Notice (PCN), May 2007 04 May 2007
More literature LM3S812 RevC0 Product Change Notice (PCN), Oct 2006 06 Oct 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

Stellaris LM3S812 48LQFP BSDL Model (Rev. A)

SPMM042A.ZIP (2 KB) - BSDL Model
Simulation model

Stellaris LM3S812 48LQFP IBIS Model (Rev. A)

SPMM043A.ZIP (251 KB) - IBIS Model
Simulation model

Stellaris LM3S812 48QFN BSDL Model

SPMM489.ZIP (2 KB) - BSDL Model
Simulation model

Stellaris LM3S812 48QFN IBIS Model

SPMM572.ZIP (253 KB) - IBIS Model
Package Pins Download
LQFP (PT) 48 View options

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