苹果机串行口定义

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苹果机在型号 512KE 及以前的机上用 9 针串行口

接口的外观

计算机侧为 9 针母插：

9 PIN D-SUB FEMALE

设备侧为 9 针公插：

9 PIN D-SUB MALE

引脚定义

　

Pin Name Dir Description
1 GND --- Ground
2 +5V --> +5 VDC. Don't use this one, it may be converted into output handshake in later equipment.
3 GND --- Ground
4 Tx+ --> Transmit Data, positive going component
5 Tx- --> Transmit Data, negative going component
6 +12V --> +12 VDC
7 DSR/HSK <-- Handshake input. Signal name depends on mode: Used for Flow Control or Clock In.
8 Rx+ <-- Receive Data, positive going component
9 Rx- <-- Receive Data, negative going component