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- ? 键盘在单片机应用系统中,实现输入数据、传送命令的功能,是人工干预的主要手段。键盘分两大类:编码键盘和非编码键盘。(In the application system of single chip microcomputer, keyboard is the main means of manual intervention, which can realize the function of input data and command. The keyboard is divided in