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本文通过在开发螺旋钢箍机的过程中，对多种键盘／显示器接口电路进行的分析，为读者推荐了一种用 8279扩展的较实用的键盘／显示器接口电路的设计方案。它具有结构简单、稳定性强、可靠性高、编程容易等优点 .
In this paper, the analysis of multiple keyboard / display interface circuits during the development of a spiral hoop machine is recommended for readers to use a more practical 8279 keyboard / display interface circuit design. It has the advantages of simple structure, strong stability, high reliability, easy programming.