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一种只利用单片机1根通信线就可实现对标准微机键盘扩展，并可实现单片机与标准微机键盘之间进行异步通信的方法。
A method which can realize the expansion of the standard microcomputer keyboard by using only one communication line of the single chip and realize the asynchronous communication between the single chip and the standard microcomputer keyboard can be realized.