LM3S6965-EQC50-A2T Datasheet PDF - TI

Architectural Overview

●The 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.

●The Stellaris family offers efficient performance and extensive integration, favorably positioning the device into cost-conscious applications requiring significant control-processing and connectivity

●capabilities. The Stellaris LM3S6000 series combines both a 10/100 Ethernet Media Access Control (MAC) and Physical (PHY) layer, marking the first time that integrated connectivity is available with an ARM Cortex-M3 MCU and the only integrated 10/100 Ethernet MAC and PHY available in an ARM architecture MCU.

●Product Features

●The LM3S6965 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

●– 38 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

●■ JTAG

●– IEEE 1149.1-1990 compatible Test Access Port (TAP) controller

●– Four-bit Instruction Register (IR) chain for storing JTAG instructions

●– IEEE standard instructions: BYPASS, IDCODE, SAMPLE/PRELOAD, EXTEST and INTEST

●– ARM additional instructions: APACC, DPACC and ABORT

●– Integrated ARM Serial Wire Debug (SWD)

●■ Hibernation

●– System power control using discrete external regulator

●– Dedicated pin for waking from an external signal

●– Low-battery detection, signaling, and interrupt generation

●– 32-bit real-time clock (RTC)

●– Two 32-bit RTC match registers for timed wake-up and interrupt generation

●– Clock source from a 32.768-kHz external oscillator or a 4.194304-MHz crystal

●– RTC predivider trim for making fine adjustments to the clock rate

●– 64 32-bit words of non-volatile memory

●– Programmable interrupts for RTC match, external wake, and low battery events

●■ Internal Memory

●– 256 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

●– 64 KB single-cycle SRAM

●■ GPIOs

●– 0-42 GPIOs, depending on configuration

●– 5-V-tolerant in input configuration

●– Fast toggle capable of a change every two clock cycles

●– Programmable control for GPIO interrupts

●• Interrupt generation masking

●• Edge-triggered on rising, falling, or both

●• Level-sensitive on High or Low values

●– Bit masking in both read and write operations through address lines

●– Can initiate an ADC sample sequence

●– Pins configured as digital inputs are Schmitt-triggered.

●– Programmable control for GPIO pad configuration

●• Weak pull-up or pull-down resistors

●• 2-mA, 4-mA, and 8-mA pad drive for digital communication; up to four pads can be

●configured with an 18-mA pad drive for high-current applications

●• Slew rate control for the 8-mA drive

●• Open drain enables

●• Digital input enables

●■ General-Purpose Timers

●– Four General-Purpose Timer Modules (GPTM), each of which provides two 16-bit

●timers/counters. Each GPTM can be configured to operate independently:

●• As a single 32-bit timer

●• As one 32-bit Real-Time Clock (RTC) to event capture

●• For Pulse Width Modulation (PWM)

●• To trigger analog-to-digital conversions

●– 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 when the controller asserts CPU Halt flag during debug

●• ADC event trigger

●– 16-bit Timer modes

●• General-purpose timer function with an 8-bit prescaler (for one-shot and periodic modes only)

●• Programmable one-shot timer

●• Programmable periodic timer

●• User-enabled stalling when the 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