User manual

I771 Motherboard User Manual
15
2.5.5 D-SUB Dual Output
The serial port COM1, which is option for RS232 / RS422 / RS485, is the Winbond
I/O serial port.
Up: 9(Male)
Down: 15(Female)
2.5.6 CN14: Serial port COM2
The serial port COM2, which is Winbond I/O support, is RS232 only.
Pin No. SYMBOL Pin No. SYMBOL
C1 DCD4/485TXRX- V1 R
C2 SRD4/485TXRX+ V2 G
C3 STD4/422RX+ V3 B
C4 DTR4/422RX- V4 NA
C5 GND V5 GND
C6 NDSRA V6 GND
C7 NRTSA V7 GND
C8 NCTSA V8 GND
C9 NRIA V9 VCC
V10 GND
V11 NA
V12 DDC_DATA
V13 CRT_HS
V14 CRT_VS
V15 DDC_CLK
Pin SYMBOL Pin SYMBOL
10 GND 9 GND
8 NRI1A 7 NDTR1A
6 NCTS1A 5 NTXD1A
4 NRTS1A 3 NRXD1A
2 NDSR1A 1 NDCD1A
C1
C6
V1
V6
V11
9
7
5
3
1
10
8
6
4
2
COM1
VGA