LM3S9B96设计的32位Cortex-M3 MCU开发设计

本文介绍了LM3S9B96 MCU Cortex-M3处理器方框图以及Stellaris® LM3S9B96开发板主要特性,方框图,电路图和扩展板电路图.

LM3S9B96是TI 公司的基于ARM Cortex-M3 的32位MCU,具有先前8位和16位MCU的价格成本, CPU工作频率80MHz,100DMIPS性能, ARM Cortex SysTick定时器,片内具有高达50MHz的256KB单周期闪存和96KB单周期SRAM,内部的ROM加载了StellarisWare软件, 具有扩展的外设接口和串行接口,目标应用在遥控监视,POS销售机,测试测量设备,网络设备和交换,工厂自动化,HVAC和建筑物控制,游戏设备,运动控制,医疗设备,电源和交通运输,防火和安全等.

LM3S9B96目标应用:

The Stellaris family is positioned for cost-conscious applications requiring significant control processing and connectivity capabilities such as:

■ Remote monitoring

■ Electronic point-of-sale (POS) machines

■ Test and measurement equipment

■ Network appliances and switches

■ Factory automation

■ HVAC and building control

■ Gaming equipment

■ Motion control

■ Medical instrumentation

■ Fire and security

■ Power and energy

■ Transportation

图1.Stellaris LM3S9B96方框图

图2.Stellaris LM3S9B96 Cortex-M3处理器方框图

Stellaris® LM3S9B96开发板

The Stellaris® LM3S9B96 Development Board provides a platform for developing systems around the advanced capabilities of the LM3S9B96 ARM® Cortex™-M3-based microcontroller.

The LM3S9B96 is a member of the Stellaris Tempest-class microcontroller family. Tempest-class devices include capabilities such as 80 MHz clock speeds, an External Peripheral Interface (EPI) and Audio I2S interfaces. In addition to new hardware to support these features, the DK-LM3S9B96 board includes a rich set of peripherals found on other Stellaris boards.

The development board includes an on-board in-circuit debug interface (ICDI) that supports both JTAG and SWD debugging. A standard ARM 20-pin debug header supports an array of debugging solutions.

The Stellaris® LM3S9B96 Development Kit accelerates development of Tempest-class microcontrollers. The kit also includes extensive example applications and complete source code.

LM3S9B96开发板主要特性:

The Stellaris® LM3S9B96 Development Board includes the following features.

Simple set-up—USB cable provides debugging, communication, and power

Flexible development platform with a wide range of peripherals

Color LCD graphics display

– TFT LCD module with 320 x 240 resolution

– Resistive touch interface

80 MHz LM3S9B96 microcontroller with 256 K Flash, 96 K SRAM, and integrated Ethernet MAC+PHY, USB OTG, and CAN communications

– – 8 MB SDRAM (plug-in EPI option board)

– – EPI break-out board (plug-in option board)

1 MB serial Flash memory

Precision 3.00 V voltage reference

SAFERTOS™ operating system in microcontroller ROM

I2S stereo audio codec

– Line In/Out

– Headphone Out

– Microphone In

Controller Area Network (CAN) Interface

10/100 BaseT Ethernet

USB On-The-Go (OTG) Connector

– Device, Host, and OTG modes

User LED and push button

Thumbwheel potentiometer (can be used for menu navigation)

MicroSD card slot

Supports a range of debugging options

– Integrated In-circuit Debug Interface (ICDI)

– JTAG, SWD, and SWO all supported

– Standard ARM® 20-pin JTAG debug connector

USB Virtual COM Port

Jumper shunts to conveniently reallocate I/O resources

Develop using tools supporting Keil™ RealView® Microcontroller Development Kit (MDK-ARM), IAR Embedded Workbench, Code Sourcery GCC development tools, Code Red Technologies development tools, or Texas Instruments’ Code Composer Studio™ IDE

Supported by StellarisWare® software including the graphics library, the USB library, and the peripheral driver library

An optional Flash and SRAM memory expansion board (DK-LM3S9B96-EXP-FS8) is also available for use with the DK-LM3S9B96 development board

– Works with the External Peripheral Interface (EPI) of the Stellaris microcontroller

– Provides Flash memory, SRAM, and an improved performance LCD interface

LM3S9B96开发板包括:

The Stellaris® LM3S9B96 Development Kit contains everything needed to develop and run a range of applications using Stellaris microcontrollers:

LM3S9B96 development board

8 MB SDRAM expansion board

EPI signal breakout board

Retractable Ethernet cable

USB Mini-B cable for debugger use

USB Micro-B cable for OTG-to-PC connection

USB Micro-A to USB A adapter for USB Host

USB Flash memory stick

microSD Card

20-position ribbon cable

CD containing:

– A supported version of one of the following (including a toolchain-specific Quickstart
guide):

• Keil™ RealView® Microcontroller Development Kit (MDK-ARM)

• IAR Embedded Workbench

• Code Sourcery GCC development tools

• Code Red Technologies development tools

• Texas Instruments’ Code Composer Studio™ IDE

– Complete documentation

– Quickstart application source code

– Stellaris® Firmware Development Package with example source code

图3.LM3S9B96开发板外形图

图4.DK-LM3S9B96开发板方框图

图5.DK-LM3S9B96开发板电路图(1)

图6.DK-LM3S9B96开发板电路图(2)

图7.DK-LM3S9B96开发板电路图(3)

图8.DK-LM3S9B96开发板电路图(4)

图9.DK-LM3S9B96开发板电路图(5)

图10.DK-LM3S9B96开发板电路图(6)

图11.用于DK-LM3S9B96的FLASH/SRAM/LCD IF扩展板电路图(1)

图12.用于DK-LM3S9B96的FLASH/SRAM/LCD IF扩展板电路图(2)