User`s manual

CT-XBT0x Mini-ITX Motherboard
19
2.4.5 COM1 Serial Port: COM1
Connector Type: 2x5-pin pitch 2.0mm wafer connector
RS-232
Pin Signal Pin Signal
1 DCD, Data Carrier Detect 2 DSR, Data Set Ready
3 RXD, Receive Data 4 RTS, Request To Send
5 TXD, Transmit Data 6 CTS, Clear To Send
7 DTR, Data Terminal Ready 8 RI, Ring Indicator
9 GND 10 NC
RS-422
Pin Signal Pin Signal
1 TXD-, Transmit Data 2 NA
3 TXD+, Transmit Data 4 NA
5 RXD+, Receive Data 6 NA
7 RXD-, Receive Data 8 NA
9 NA 10 NC
RS-485
Pin Signal Pin Signal
1 Data-, Transmit Data 2 NA
3 Data+, Transmit Data 4 NA
5 NA 6 NA
7 NA 8 NA
9 NA 10 NC
2.4.6 COM2~6 Serial Ports: COM2~6
Connector Type: 2x5-pin pitch 2.0mm wafer connector
RS-232
Pin Signal Pin Signal
1 DCD, Data Carrier Detect 2 DSR, Data Set Ready
3 RXD, Receive Data 4 RTS, Request To Send
5 TXD, Transmit Data 6 CTS, Clear To Send
7 DTR, Data Terminal Ready 8 RI, Ring Indicator
9 GND 10 NC