This type of bus interface can be accessed by memory mode and be applied to the exchange of data between two hosts, which can overcome the lack of communication interface in some types of CPU.
本接口采用存储器访问模式，克服了某些CPU外围通信接口少的缺点，易于实现双CPU间的总线对接，且无需考虑复杂的总线仲裁机制。
This paper describes a multiplexer which can multiplex two channels of data. It adopts asynchronous serial communication mode, USES Single chip CPU-89C51 and other IC chips to realize the function.
本文探讨的是一个两路的数据复用器，该数据复用器采用异步串行通信方式，主要用89c5 1单片机来实现。
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