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\textbf{关键词: }键盘扫描方案\space 多路复用器 \space 模拟开关
\indent 该键盘扫描方案具有高速、高精度、占用IO口少等优点,\\\\ \indent 本文将分别提出两种键盘扫描方案:被动扫描方案和主动扫描方案。\\\\ \indent 采用CD4067B\space 16进1模拟开关,将每16个按键的输出通过轮询集中到一个IO口上,用MCU的GPIO操作模拟开关的地址输入 ...
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