ArrowARM Guide - Embedded Developer

38 |Stellaris ® FamilyCore: Cortex-M3Luminary Micro, Inc. designs, markets, and sells ARM ® Cortex-M3-based microcontrollers(MCUs). As ARM’s lead partner for Cortex-M3 technology, Luminary Micro has deliveredthe world’s first silicon implementation of the Cortex-M3 processor, providing 32-bitperformance at 8-/16-bit cost. Luminary Micro’s Stellaris family of microcontrollersincorporates the ARM Cortex-M3 core running up to 50 MHz, single-cycle embeddedFlash and SRAM, a low-dropout voltage regulator, integrated brown-out reset andpower-on reset functions, analog comparators, 10-bit ADC, SSI, GPIOs, watchdog andgeneral purpose timers, UARTs, I 2 C, motion control PWMs, and quadrature encoderinputs. With peripherals provided directly to the pins without feature multiplexing, thisrich feature set is ideal for applications such as building and home automation; factoryautomation and control; industrial control power devices; stepper motors; brushedand brushless DC motors; and AC induction motors.Features • Single-cycle flash and single-cycle SRAM accesses formaximum performance• Deterministic, fast interrupt processing: always 12 cycles,or just 6 cycles with tail-chaining• Single-cycle multiply instruction and hardware divide for fastcontrol algorithm performance• All GPIOs can generate interrupts, are 5V-tolerant, and haveprogrammable drive strength and slew rate control• Advanced motion control support in hardware and softwarespeeds time to market• ARM Thumb-2 mixed 16-/32-bit instruction set for compact,powerful code• Extra on-chip debug support including data watchpointsand flash patching• Integrated low-dropout voltage regulator, brown-out reset,and power-on reset functions for easy system design• An instruction-set-compatible family with prices from $1 andspeeds up to 1 GHz, the Cortex processor family can grow withyour application needs• Cost-effective: utilize 32-bit performance for the same priceas current 8- and 16-bit microcontroller designs• Program only in C; no assembly code ever requiredStellaris Family Block DiagramBenefits • Requires half the flash (code space) of ARM7 applications• 2-4 times faster than ARM7 and 8-10 times faster than othercompeting architectures in typical MCU control applications• Both analog comparators and ADC functionality provide on-chipsystem options to balance hardware and software performance• No functional pin muxing-choose your part by the functions youneed for easy design-inArrow Electronics ARM Solutions1-866-910-3650