微机控制系统总线中的实际问题及对策

THE PRACTICAL PROBLEMS AND CONTERMEASURES IN MICROCOMPUTER CONTROL SYSTEM BUS

本文分析了采用标准总线构成微机应用系统时,必须考虑的一些实际干扰问题,例如,信号在总线上传输造成的延迟,总线上由于负载不匹配造成的反射,由于分布参数造成的串扰,总线驱动以及进行总线扩展时可能出现的问题,给出了解决问题的方法。综合运用这些方法,可设计出高可靠性的微机实时控制系统。

Some practical disturbance problems are anelysed in this pa- per. For example, the delay caused by signal transmission on BUS, the reflec- tion caused because of dis-matching of load on BUS, the cross disturbance caused by distributed parameter, problems caused by BUS driving and ex- panding. This paper presents the methods for sloving the problems. The high reliable microcomputer real-time control systems can be designed by using the methods synthetically.