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ST的SPEAr600應用于MPU嵌入式VoIP解決方案

2010/04/22

　　SPEAr600 是具有雙ARM926EJ-S核的嵌入式MPU, 性能高達733 DMIPS,支持靈活的存儲器,有功能強大的連接特性和可編程的LCD接口. ARM926EJ-S內(nèi)核的工作頻率高達333MHz,其中的MMU支持虛擬的存儲器管理,是系統(tǒng)能和Linux操作系統(tǒng)兼容.主要用在需要大量計算的應用中如企業(yè)VoIP設備,可編邏輯控制器(PLC),醫(yī)療實驗室/診斷設備,無線接入設備,家用電器等.本文介紹SPEAr600主要特性,方框圖, 典型系統(tǒng)架構(gòu)圖以及EVALSPEAR600評估板主要特性,電路圖和材料清單(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應用:

　　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.


圖1.SPEAr600功能方框圖

圖2.SPEAr600典型系統(tǒng)架構(gòu)圖

　　EVALSPEAR600評估板

　　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評估板包括:

　　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)

圖3.EVALSPEAR600評估板外形圖

圖4.EVALSPEAR600評估板電路圖(1)
圖5.EVALSPEAR600評估板電路圖(2)
圖6.EVALSPEAR600評估板電路圖(3)


圖7.EVALSPEAR600評估板電路圖(4)


圖8.EVALSPEAR600評估板電路圖(5)


圖9.EVALSPEAR600評估板電路圖(6)



圖10.EVALSPEAR600評估板電路圖(7)

圖11.EVALSPEAR600評估板電路圖(8)

圖12.EVALSPEAR600評估板電路圖(9)

圖13.EVALSPEAR600評估板電路圖(10)

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新浪科技(tech.sina.com.cn)


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