基于龙芯2F的车载和便携设备系统设计  

A Design of Car-Loading and Portable devices System Based on Loongson-2F

作　　者：张军[1] 蔡晔[2] 

机构地区：[1]井冈山大学工学院,江西吉安343009 [2]中国科学院研究生院,北京100080

出　　处：《微计算机信息》2009年第14期59-60,39,共3页Control & Automation

基　　金：国家自然基金项目<资源有效的单片机多处理器结构研究>;基金颁发部门:国家自然基金委员会(60673146);国家863计划重点课题<低成本先进计算机单机>;基金颁发部门:国家科技部(2006AA01D201)

摘　　要：设计了一款基于国产处理器龙芯2F的嵌入式应用系统,该系统主要面向车载和便携设备。针对车载和便携设备的特点,在芯片选择上主要突出低功耗和稳定性;对直流电源部分进行了优化,提高了整个系统的效率;在系统的调试过程中,采用替代手段消除SM502芯片I2C逻辑上的bug,使系统支持市场上所有类型的内存条;为使系统的信号完整性达到高频电路的要求,提出了相应的设计方法和流程。An Embedded Application System is Designed based on China-made CPU LOONGSON-2F ,The system is mainly for automotive and portable devices, for the characteristics of automotive and portable devices,ln the choice of the chip mainly to highlight the low power consumption and stability.Some of the DC power supply has been optimized,Improve the efficiency of the entire system. this papers adopt way of replace to eliminate logic Bug on I2C of SM502 chip, so as to make the system applied to all kinds of memory bank on market sell.Furthermore. To enable the system to perform signal integrity,During the debugging of this system, relevant design ways and flow program have been put forth according to requirements of high-frequency circuit for signal completion.

关 键 词：龙芯2F 便携设备 DDR2 信号完整性 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]