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文章介绍了一种可实现任意编码的键盘接口电路的设计，该接口电路可在按键动作后，直接输出键值或键码，而无需做任何转换或处理，且当按键的位置或键值需要更改时特别方便，无需对系统软件做任何修改。
This paper introduces a design of the keyboard interface circuit which can realize arbitrary coding. The interface circuit can directly output the key or key code after the key action without any conversion or processing, and when the key position or key value is needed It is especially convenient to change, do not need to make any modification to the systematic software.