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文章介绍一种基于８０３１单片机的智能多机串行通信接口，能够可靠地实现微机与多个打卡机之间双向串行数据通信。
This article introduces a kind of intelligent multi-machine serial communication interface based on 8031 single-chip microcomputer, which can realize two-way serial data communication between microcomputer and multiple punch card machines reliably.