PPC-6101
All-in-One CPU Board Series User’s Manual
Jumpers and Connectors
34
3.4.17 Serial Port Interface
3.4.17.1 COM Port Connector: COM1
The connector, COM 1, is a DB-9 connector,
and the following table
shows the pin assignments of this connector.
Pin Signal
Name
1
DCD, Data carrier detect
2
RXD, Receive data
3
TXD, Transmit data
4
DTR, Data terminal ready
5
GND, ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
COM1
3.4.17.2 COM Port Connectors: COM2, COM3, COM4
The RS-232 pin assignments are listed on the following table.
Pin Description Pin Description
1
Data Carrier Detect (DCD)
2
Data Set Ready (DSR)
3
Receive Data (RXD)
4
Request to Send (RTS)
5
Transmit Data (TXD)
6
Clear to Send (CTS)
7
Data Terminal Ready (DTR)
8
Ring Indicator (RI)
9
Ground (GND)
10
NC
2
4
6
1
3
5
7
8
9
10
