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PIN No. Name Description
C3 GND Ground
C4 MICPWR Micro phone
C5 GND Ground
KB/MS 6 pin MINI-DIN female (CN3)
PIN No. Name Description
1 KB DATA Keyboard data
2 MS DATA Mouse data
3 GND Ground
4 VCC +5V
5 KB CLK Keyboard clock
6 MS CLK Mouse clock
COM2 Pin Definition (CN4)
RS-232
PIN No. Signal Description PIN No.
Signal Description
1 Data Carrier Detect 2 Received Data
3 Transmit Data 4 Data Terminal Ready
5 Ground 6 Data Set Ready
7 Request To Send 8 Clear To Send
9 Ring Indicator
RS-422
PIN No. Signal Description PIN No.
Signal Description
1 Transmit Data (-) 2 Transmit Data (+)
3 Receive Data (+) 4 Receive Data (-)
5 Ground 6 Data Set Ready
7 Request To Send 8 Clear To Send
9 Ring Indicator
RS-485
PIN No. Signal Description PIN No.
Signal Description
1 Transmit Data (-) 2 Transmit Data (+)
3 N/A 4 N/A
5 Ground 6 Data Set Ready
7 Request To Send 8 Clear To Send
9 Ring Indicator
COM3/4 Pin Definition (CN5/6)