【摘要】 介绍了几种实用的微机与单片机联网的通讯接口电路，提出了一种采用ＲＳ－４２２的通讯接口电路，其结构简单，可以方便、可靠、长距离实现多点通信更多还原

【Abstract】 After introducing several practical communication interface circuits for microcomputer and single chip microcomputer networking, the author put forward a communication interface circuit utiliazing RS-422 which is simple in structure and can implement long-distance multi-point communication conveniently and reliably.更多还原