Serial port
Pin | Signal |
|
|
1 | Data carrier detect |
|
|
2 | Received data |
|
|
3 | Transmitted data |
|
|
4 | Data terminal ready |
|
|
5 | Signal ground |
|
|
6 | Data set ready |
|
|
7 | Request to send |
|
|
8 | Clear to send |
|
|
9 | Ring indicator |
|
|
Universal Serial Bus
Pin | Signal |
|
|
1 | +5 VDC |
|
|
2 | Data - |
|
|
3 | Data + |
|
|
4 | Ground |
|
|
152 Chapter 9 Connector pin assignments