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)