基于CPCI总线CPU主控模块的设计与实现

Design and realization of CPU module based on CPCI

在一些恶劣环境和军事应用环境条件下，所应用的计算机比普通商用计算机具有更高、更严的要求，提出基于CPCI总线的CPU主控模块设计方案。该方案严格遵守CPCI规范，利用高性能、低功耗、集成度高的ETXPM模块实现通用计算机的主板功能，采用TI公司的PCI2050B桥电路作为CPCI的接口模块，实现了多级总线扩展结构。该设计方案简化了设计，节省了30％的研制费用，缩短了1／2的研制周期。该模块已经通过舰载的应用测试，在-40．85℃的环境下，系统工作稳定，各接口应用正常，达到了该项目的技术指标要求。

In harsh environment and military application environment, military computer has higher and stricter request than general computer. On this basis,the design scheme of CPCI bus main control module was proposed. The scheme complied with the CPCI specification and used high capacity,low energy consumption and high integration ETX PM module to complete the main board function of general computer. The scheme used the PCI-to-PCI bridge as CPCI interface module to realize multi-level bus expansion structure.The scheme simplifies design,30% reduction in the cost and shortens 1/2 research period.The CPU module passed through the application test on the ship,at -40-85℃ environment,the system works steady and meets the request of project for technical indicators.