[LUMINARY MICRO]
●Architectural Overview
●The Luminary Micro Stellaris® family of microcontrollers—the first ARM® Cortex™-M3 based controllers—brings high-performance 32-bit computing to cost-sensitive embedded microcontroller
●applications. These pioneering parts deliver customers 32-bit performance at a cost equivalent to legacy 8- and 16-bit devices, all in a package with a small footprint.
●Product Features
●The LM3S817 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) provides 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
●– 26 interrupts with eight priority levels
●– Memory protection unit (MPU) provides a privileged mode for protected operating system functionality
●– Unaligned data access, enabling data to be efficiently packed into memory
●– Atomic bit manipulation (bit-banding) delivers maximum memory utilization and streamlined peripheral control Internal Memory
●– 64-KB single-cycle flash
●• User-managed flash block protection on a 2-KB block basis
●• User-managed flash data programming
●• User-defined and managed flash-protection block
●– 8-KB single-cycle SRAM
● General-Purpose Timers
●– Three timers, each of which can be configured: as a single 32-bit timer, as two 16-bit timers, or to initiate an ADC event
●– 32-bit Timer modes:
●• Programmable one-shot timer
●• Programmable periodic timer
●• Real-Time Clock when using an external 32.768-KHz clock as the input
●• User-enabled stalling in periodic and one-shot mode when the controller asserts the CPU Halt flag during debug
●• ADC event trigger
●– 16-bit Timer modes:
●• General-purpose timer function with an 8-bit prescaler
●• Programmable one-shot timer
●• Programmable periodic timer
●• User-enabled stalling whenthe controller asserts CPU Halt flag during debug
●• ADC event trigger
●– 16-bit Input Capture modes:
●• Input edge count capture
●• Input edge time capture
●– 16-bit PWM mode:
●• Simple PWM mode with software-programmable output inversion of the PWM signal
