IEI Integration IMBA-Q870-i2 - Manual (Page 58)

IMBA-Q870-i2 ATX Motherboard
Page 40
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
13 RXD 14 RTS
COM3 15 TXD 16 CTS
17 DTR 18 RI
19 GND 20 GND
21 DCD 22 DSR
23 RXD 24 RTS
COM5 25 TXD 26 CTS
27 DTR 28 RI
29 GND 30 GND
31 DCD 32 DSR
33 RXD 34 RTS
COM6 35 TXD 36 CTS
37 DTR 38 RI
39 GND 40 GND
Table 3-21: COM3~6 Serial Port Connector Pinouts
3.2.22 Serial Port Connector, RS-422/485
CN Label: COM4
CN Type: 4-pin wafer
CN Location: See Figure 3-23
CN Pinouts: See Table 3-22
Used for RS-422/485 communications.