3个IO口4*4键盘

上传者: gao312824518 | 上传时间: 2022-07-18 13:08:53 | 文件大小: 387KB | 文件类型: RAR
专为IO口较少的单片机打造,运用巧妙的算法,使仅仅用三个IO口就能够控制十六个键盘,附有程序及完整的电路图!!!

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