Serial; Universal Serial Bus - HP ProBook 6545b Maintenance And Service Manual

Connector pin assignments

Serial

Pin
1
2
3
4
5
6
7
8
9

Universal Serial Bus

Pin
1
2
3
4
9–4
Signal
1 Data carrier detect
Received data
Transmitted data
Data terminal ready
Signal ground
Data set ready
Request to send
Clear to send
Ring indicator
Signal
+5 VDC
Data
Data +
Ground
Maintenance and Service Guide