一种新的单片机和AT机通用键盘的接口

A new interface between single-chip microcomputer and general keyboard of AT computer

介绍一种 C5 0 5 CA单片机与 AT机通用键盘的新的接口电路 .该接口电路既能接收 AT机键盘的接通码 ,也能接收断开码 ,又不占用单片机的串行口 .

A new interface between C505CA and general keyboard of AT computer is introduced.The interface circuit can receive not only the on scan codes from AT computer′s keyboard but also the off scan codes, and it doesn′t occupy the microcomputer′s serial port.