LM3S1627 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

  • 128 KB single-cycle flash and 32 KB single-cycle SRAM

  • Internal ROM loaded with StellarisWare® software

  • ARM PrimeCell® 32-channel configurable μDMA controller

  • 0-33 GPIOs (depending on configuration) with programmable control for GPIO interrupts and pad configuration

  • ARM FiRM-compliant Watchdog Timer ; plus four 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 four analog input channels and a sample rate of 500 thousand samples/second

  • Two fully programmable 16C550-type UARTs with IrDA support

  • 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

  • Three 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; one PWM fault inputs to promote low-latency shutdown

  • Quadrature Encoder Interface (QEI) featuring position integrator to track encoder position and velocity capture using built-in timer

  • Industrial-range 64-pin RoHS-compliant LQFP package

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The Stellaris® LM3S1627 microcontroller is based on the ARM® Cortex™-M3 controller core operating at up to 50 MHz, with 128 kB flash, 32 kB SRAM, a 32-ch DMA, and ROM preloaded with the StellarisWare Driver Library and BootLoader. The LM3S1627 also features real-time industrial connectivity, with an SSI / SPI controller, an I2C interface, and 2 UARTs. The LM3S1627 microcontroller also features advanced motion control features, including 6 motion-control PWM outputs with dead-band, a quadrature encoder input for precise position monitoring, and a fault protection input for low-latency shutdown. The microcontroller also features intelligent analog capability, including .4 channels of highly accurate 10-bit analog-to-digital conversion - with the ability to sample at speeds of 500K samples per second. Finally, the LM3S1627 microcontroller provides a 24-bit systick timer, 4 32-bit or 8 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 33 GPIOs.

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Technical documentation

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Type Title Date
* Data sheet Stellaris LM3S1627 Microcontroller Data Sheet datasheet (Rev. H) Jul. 18, 2014
* Errata Stellaris LM3S Sandstorm-, Fury-, and DustDevil-Class Microcontrollers Errata Jun. 26, 2014
Technical article 5 ways high-performance MCUs are reshaping the industry Jul. 12, 2021
User guide SYS/BIOS (TI-RTOS Kernel) User's Guide (Rev. V) Jun. 01, 2020
User guide TI-RTOS 2.20 User's Guide (Rev. M) Jun. 17, 2016
User guide TI-RTOS 2.16 User's Guide (Rev. L) Feb. 22, 2016
Application note Differences Among Stellaris® LM3S and Tiva™ C Series TM4C123x MCUs (Rev. E) Sep. 24, 2013
User guide Stellaris Boot Loader User's Guide (SW-BOOTLDR-UG) (Rev. P) Apr. 19, 2013
User guide Stellaris Graphics Library User's Guide (SW-GRL-UG) (Rev. P) Apr. 19, 2013
User guide Stellaris Peripheral Driver Library User's Guide (SW-DRL-UG) (Rev. P) Apr. 19, 2013
User guide StellarisWare Release Notes (SW-RLN) (Rev. Q) Apr. 19, 2013
Application note System Design Guidelines for Stellaris® Microcontrollers   (Rev. B) Feb. 04, 2013
Application note ADC Oversampling Techniques for Stellaris Microcontrollers (AN01239) (Rev. A) Jan. 08, 2013
Application note Stellaris® LM3S ADC Calibration (AN01282) (Rev. C) Nov. 01, 2012
Application note Using Execute, Write/Erase Flash Protection on Stellaris MCUs Using CCS (Rev. A) Aug. 15, 2012
User guide StellarisWare Release Notes (SW-RLN) (Rev. N) Dec. 11, 2011
User guide Cortex-M3/M4F Instruction Set Technical User's Manual (Rev. A) Nov. 23, 2011
User guide Stellaris LM3S1627 ROM User's Guide (Rev. C) Sep. 16, 2011
More literature Stellaris DustDevil-Class Product Change Notice Jan. 26, 2011
White paper Serial Wire Debug—Ideal for Microcontrollers Sep. 09, 2010
More literature Stellaris Product Change Notice (PCN), Sept 2009 Sep. 07, 2009
Application note Implementing RS-232 Flow Control on a Stellaris Microcontroller (AN01255) Jul. 07, 2009
Application note Optimizing Code Performance and Size for Stellaris Microcontrollers (AN01265) Jul. 07, 2009
Application note Programming the On-Chip Flash Memory in a Stellaris Microcontroller (AN01237) Jul. 07, 2009
Application note Software UART for Stellaris Microcontrollers (AN01270) Jul. 07, 2009
Application note Using Stellaris MCUs Internal Flash Memory to Emulate EEPROM (AN01267) Jul. 07, 2009
Application note Using a 9-bit Software UART with Stellaris (AN01280) Jul. 07, 2009
Application note Using the Stellaris Microcontroller Analog-to-Digital Converter (AN01247) Jul. 07, 2009
Application note Using the Stellaris Serial Flash Loader (AN01242) Jul. 07, 2009
More literature ARM Cortex-M3 Errata (r1p1 and r2p0) Nov. 12, 2008
User guide Stellaris Peripheral Driver Library User's Guide (Deprecated Version) Sep. 29, 2008
More literature LM3S1627 RevA Product Change Notice (PCN), May 2008 May 13, 2008

Design & development

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Design tools & simulation

SPMM129.ZIP (2 KB) - BSDL Model
SPMM192.ZIP (249 KB) - IBIS Model
SPMR052.ZIP (1 KB)

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