IEI Integration IMB-G41A - Manual (Page 49)

IMB-G41A Micro-ATX Motherboard
Page 37
3.2.18 Serial Port Connectors, RS-232
CN Label: COM3-6, COM7-10
CN Type: 40-pin header (2x20)
CN Location: See Figure 3-19
CN Pinouts: See Table 3-18
Each of these connectors provides RS-232 connections for four serial ports.
Figure 3-19: Serial Port Connector Location
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 DATA CARRIER DETECT (DCD1) 2 DATA SET READY (DSR1)
3 RECEIVE DATA (RXD1) 4 REQUEST TO SEND (RTS1)
5 TRANSMIT DATA (TXD1) 6 CLEAR TO SEND (CTS1)
7 DATA TERMINAL READY (DTR1) 8 RING INDICATOR (RI1)
9 GND 10 GND
11 DATA CARRIER DETECT (DCD2) 12 DATA SET READY (DSR2)
13 RECEIVE DATA (RXD2) 14 REQUEST TO SEND (RTS2)
15 TRANSMIT DATA (TXD2) 16 CLEAR TO SEND (CTS2)
17 DATA TERMINAL READY (DTR2) 18 RING INDICATOR (RI2)
19 GND 20 GND