蘋果機鍵盤接口

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蘋果機鍵盤接口爲  4 針母插座(RJ11):

引腳定義

 

Pin Name Dir Description
1 CGND --- Chassis ground
2 KBD1 ? Keyboard clock
3 KBD2 ? Keyboard data
4 +5V --> +5 VDC