PS/2键盘接口在单片机中的应用研究

Research of PS/2 Keyboard Interface Applied into SCM

PS/2键盘接口由于采用标准PS/2协议通信,易于控制,在嵌入式系统中有良好的应用前景.针对如何使用这种接口,介绍了其物理接口及通信协议,重点对工作时序和部分命令字进行了说明.在应用中,给出了PS/2键盘与单片机的接口电路及通信方案,并提供相应的接口通信程序.

As communication through standard PS/2 protocol can be controlled easily, PS/2 Keyboard Interface has a promising application. In order to explain its usage, this paper has introduced PS/2 Keyboard physical Interface and its communication protocol, especially illuminated its work timing and some commands in detail. In application, the circuit of interface and communication scheme between PS/2 interface and SCM are provided, along with some procedure about communication.