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ST的SPEAr600应用于MPU嵌入式VoIP解决方案

2010/04/22

　　SPEAr600 是具有双ARM926EJ-S核的嵌入式MPU, 性能高达733 DMIPS,支持灵活的存储器,有功能强大的连接特性和可编程的LCD接口. ARM926EJ-S内核的工作频率高达333MHz,其中的MMU支持虚拟的存储器管理,是系统能和Linux操作系统兼容.主要用在需要大量计算的应用中如企业VoIP设备,可编逻辑控制器(PLC),医疗实验室/诊断设备,无线接入设备,家用电器等.本文介绍SPEAr600主要特性,方框图, 典型系统架构图以及EVALSPEAR600评估板主要特性,电路图和材料清单(BOM).

　　The SPEAr600 is a member of the SPEAr family of embedded MPUs for networked devices, it is based on dual ARM926EJ-S processors (up to 333 MHz), widely used in applications where high computation performance is required.

　　Both processors have an MMU supporting virtual memory management and making the system compliant with the Linux operating system. They also offer 16 KBytes of data cache, 16 KBytes of instruction cache, JTAG and ETM (embedded trace macro-cell) for debug operations.

　　To expand its range of target applications, SPEAr600 can be extended by adding additional peripherals through the external local bus (EXPI interface).

　　SPEAr600主要特性:

　　Dual ARM926EJ-S core up to 333 MHz:

　　Each with 16 Kbytes instruction cache + 16 Kbytes data cache

　　High performance 8-channel DMA

　　Dynamic power saving features

　　Up to 733 DMIPS

　　Memory:

　　External DRAM interface: 8/16-bit DDR1-333 / DDR2 – 666

　　32 Kbytes BootROM / 8 Kbytes internal SRAM

　　Flexible static memory controller (FSMC) supporting parallel NAND Flash memory
Interface

　　Serial NOR Flash Memory interface

　　Connectivity:
　　2 x USB 2.0 Host

　　USB 2.0 Device

　　Giga Ethernet (GMII port)

　　I2C and fast IrDA interfaces

　　3 x SSP Synchronous serial peripheral (SPI, Microwire or TI protocol) ports

　　2 x UART interfaces

　　Peripherals supported:

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

　　Touchscreen support

　　Miscellaneous functions

　　Integrated real-time clock, watchdog, and system controller

　　8-channel 10-bit ADC, 1 Msps

　　JPEG codec accelerator

　　10 GPIO bidirectional signals with interrupt capability

　　10 independent 16-bit timers with programmable prescaler

　　32-bit width External local bus (EXPI interface).

　　3 x I2S interfaces for audio features:

　　One stereo input and two stereo outputs (audio 3.1 configuration capable)

　　Software:

　　System compliant with all operating systems (including Linux)

　　SPEAr600应用:

　　The SPEAr® embedded MPU family targets networked devices used for communication, display and control. This includes diverse consumer, business, industrial and life science applications such as:

　　IP phones, thin client computers, printers, programmable logic controllers, PC docking stations,

　　Medical lab/diagnostics equipment, wireless access devices, home appliances, residential control and security systems, digital picture frames, and bar-code scanners/readers.


图1.SPEAr600功能方框图

图2.SPEAr600典型系统架构图

　　EVALSPEAR600评估板

　　The EVALSPEAR600 evaluation board is a complete development platform for SPEAr600. It offers an easy and flexible solution for demonstrating device capabilities and quickly evaluating features and peripherals. It integrates a SPEAr600 embedded MPU with a high-performance dual ARM 926EJ-S core, two USB 2.0 hosts, one USB 2.0 device port and a Giga-Ethernet MAC. The evaluation boards include a complete range of hardware features for evaluating SPEAr600 performance and for starting development of a wide range of applications. Features include serial and parallel Flash, DDR2 memory, USB 2.0, Giga-Ethernet, SPI, Fast IrDA, I2C, UARTs and LCD expansion board connector. The board features an industry-standard JTAG and ETM connectors allowing developers to choose from a wide choice of development tools.

　　EVALSPEAR600评估板包括:

　　SPEAr Plus600

　　5 x 2 box header connector (COM2)

　　8 Mbytes serial Flash

　　10 GPIOs

　　64 Mbytes NAND Flash

　　8 pins for ADC channels

　　128 Mbytes DDR2 @ 333 MHz

　　3 SPI I/F

　　4 Kbytes serial I2C

　　Fast IrDA connector

　　2 USB 2.0 host ports

　　LCD expansion board connector

　　1 USB 2.0 device port

　　Debug I/F:

　　RJ45 Ethernet connector 10/100/1000

　　2 JTAGs

　　UART Connectors

　　2 ETM I/F

　　DB9 connector (COM1)

图3.EVALSPEAR600评估板外形图

图4.EVALSPEAR600评估板电路图(1)
图5.EVALSPEAR600评估板电路图(2)
图6.EVALSPEAR600评估板电路图(3)


图7.EVALSPEAR600评估板电路图(4)


图8.EVALSPEAR600评估板电路图(5)


图9.EVALSPEAR600评估板电路图(6)



图10.EVALSPEAR600评估板电路图(7)

图11.EVALSPEAR600评估板电路图(8)

图12.EVALSPEAR600评估板电路图(9)

图13.EVALSPEAR600评估板电路图(10)

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新浪科技(tech.sina.com.cn)


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