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文章分析了单片机外部扩展的总线时序,提出了当系统通过总线方式连接时,地址、数据总线的分时复用的问题,通过举例说明系统扩展中数据地址总线电路部分以及相应程序的设计方法。
This paper analyzes the bus sequence of external expansion of single chip microcomputer, and proposes the problem of time division multiplexing of address and data bus when the system is connected by bus. By means of an example, the part of data bus circuit in the system expansion and the design method of the corresponding program are illustrated.