Product Features

The LM3S615 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

– Integrated Nested Vectored Interrupt Controller (NVIC) providing deterministic interrupt

handling

– 28 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

■ ARM® Cortex™-M3 Processor Core

– 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

• 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