LM3S5D91 Datasheet, PDF (47/1340 Pages) Texas Instruments – Stellaris® LM3S5D91 Microcontroller

Stellaris^® LM3S5D91 Microcontroller
1.2
1.3
1.3.1
1.3.1.1
In addition, the LM3S5D91 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 LM3S5D91 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 LM3S5D91 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 LM3S5D91 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 67)
■ 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
■ Thumb-2 mixed 16-/32-bit instruction set delivers the high performance expected of a 32-bit
ARM core in a compact memory size usually associated with 8- and 16-bit devices, typically in
the range of a few kilobytes of memory for microcontroller-class applications
– Single-cycle multiply instruction and hardware divide
– Atomic bit manipulation (bit-banding), delivering maximum memory utilization and streamlined
peripheral control
January 22, 2012
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