原标题：ST SPEAr320 MPU工厂自动化嵌入式开发方案

　　ST公司的SPEAr320 是具有ARM926内核的嵌入MPU,最适合用于工厂自动化和消费类电子产品.功能强大的ARM926EJ-S处理器工作频率高达333MHz,具有高性能的8路DMA,32KB ROM和8KB SRAM,LPDDR-333/DDR2-666 外接存储器接口,SDIO/MMC 卡接口以及串行闪存接口(SMI),外设支持TFT/STN LCD控制器,各种功能的触摸屏,支持1Msps的8路10位ADC和4xPWM定时器.主要用在可编程逻辑控制器,工厂自动化和打印机.本文介绍了SPEAr320主要特性, 功能方框图, 系统典型架构图和EVALSPEAr320CPU SPEAr320 CPU评估板主要特性,方框图,电路图和材料清单.

　　The SPEAr320 is a member of the SPEAr family of embedded MPUs, optimized for industrial automation and consumer applications. It is based on the powerful ARM926EJ-S processor (up to 333 MHz), widely used in applications where high computation performance is required.

　　In addition, SPEAr320 has an MMU that allows virtual memory management -- making the system compliant with Linux operating system. It also offers 16 KB of data cache, 16 KB of instruction cache, JTAG and ETM (Embedded Trace Macrocell) for debug operations.

　　A full set of peripherals allows the system to be used in many applications, some typical applications being factory automation, printer and consumer applications.

　　SPEAr320主要特性:

　　■ ARM926EJ-S 333 MHz core

　　■ High-performance 8-channel DMA

　　■ Dynamic power-saving features

　　■ Configurable peripheral functions on 102 shared I/Os.

　　■ Memory:

　　– 32 KB ROM and 8 KB internal SRAM

　　– LPDDR-333/DDR2-666 external memory interface

　　– SDIO/MMC card interface

　　– Serial Flash memory interface (SMI)

　　– Flexible static memory controller (FSMC) up to 16-bit data bus width, supporting NAND Flash

　　– External memory interface (EMI) up to 16- bit data bus width, supporting NOR Flash and FPGAs

　　■ Security

　　– Cryptographic accelerator

　　■ Connectivity

　　– 2 x USB 2.0 Host

　　– 1 x USB 2.0 Device

　　– 2 x fast Ethernet MII/SMII ports

　　– 2 x CAN interface

　　– 3 x SSP Synchronous serial port (SPI, Microwire or TI protocol)

　　– 2 x I2C

　　– 1 x fast IrDA interface

　　– 3 x UART interface

　　– 1 x standard parallel device port

　　■ Peripherals supported

　　– TFT/STN LCD controller (resolution up to 1024 x 768 and up to 24 bpp)

　　– Touchscreen support Miscellaneous functions

　　– Integrated real time clock, watchdog, and system controller

　　– 8-channel 10-bit ADC, 1 Msps

　　– 4 x PWM timers

　　– JPEG CODEC accelerator

　　– 6x 16-bit general purpose timers with programmable prescaler, 4 capture inputs

　　– Up to 102 GPIOs with interrupt capability

　　SPEAr320应用:

　　The SPEAr320 embedded MPU is configurable for a range of industrial and consumer applications such as:

　　■ Programmable logic controllers

　　■ Factory automation

　　■ Printers

　　图1.SPEAr320功能方框图

　　图2.SPEAr320系统典型架构图

　　EVALSPEAr320CPU SPEAr320 CPU评估板

　　This document applies to revision 2.0 SPEAr320 CPU evaluation boards.

　　This board can be used to evaluate SPEAr320 microprocessors; the evaluation board kit comprises one board, one serial cable interface, and one power supply.

　　SPEAr320 CPU评估板主要特性:

　　■ SPEAr320 embedded MPU

　　■ Up to 2 Gbit DDR2 333 MHz (standard 128 Mbytes)

　　■ Up to 16 Mbyte Serial Flash memory (standard 8 Mbytes)

　　■ Two USB 2.0 full host port channels

　　■ One USB 2.0 host device port

　　■ One serial port (up to 115 baud)

　　■ JTAG Debug ports

　　图3.SPEAr320 CPU评估板外形图

　　图4.SPEAr320 CPU评估板方框图

　　SPEAr320 CPU评估板元件清单(BOM):