基于SPEAr320的工厂自动化嵌入式开发方案详解

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

图5.SPEAr320 CPU评估板电报路互连图

图6.SPEAr320 CPU评估板电路图:DDR接口

图7.SPEAr320 CPU评估板电路图:USB接口

图8.SPEAr320 CPU评估板电路图:USB电源和可选部件

图9.SPEAr320 CPU评估板电路图:各种接口

图10.SPEAr320 CPU评估板电路图:电源

图11.SPEAr320 CPU评估板电路图:个性化接口

图12.SPEAr320 CPU评估板电路图:子板接口

SPEAr320 CPU评估板元件清单(BOM):