LM3S1G21 Datasheet, PDF (36/955 Pages) Texas Instruments – Stellaris® LM3S1G21 Microcontroller

Architectural Overview
1.2
1.3
1.3.1
1.3.1.1
For applications requiring extreme conservation of power, the LM3S1G21 microcontroller features
a battery-backed Hibernation module to efficiently power down the LM3S1G21 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
battery-backed memory, the Hibernation module positions the LM3S1G21 microcontroller perfectly
for battery applications.
In addition, the LM3S1G21 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 LM3S1G21 microcontroller is code-compatible
to all members of the extensive Stellaris family; providing flexibility to fit precise needs.
Texas Instruments 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.
Target Applications
The Stellaris family is positioned for cost-conscious applications requiring significant control
processing and connectivity capabilities such as:
■ Gaming equipment
■ Home and commercial site monitoring and control
■ Motion control
■ Medical instrumentation
■ Test and measurement equipment
■ Factory automation
■ Fire and security
■ Lighting control
■ Transportation
Features
The LM3S1G21 microcontroller component features and general function are discussed in more
detail in the following section.
ARM Cortex-M3 Processor Core
All members of the Stellaris product family, including the LM3S1G21 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.
Processor Core (see page 53)
■ 32-bit ARM Cortex-M3 architecture optimized for small-footprint embedded applications
■ 80-MHz operation; 100 DMIPS performance
■ Outstanding processing performance combined with fast interrupt handling
36
January 22, 2012
Texas Instruments-Production Data