Norco MITX-6922 - Page 18

MITX-6922 Mini-ITX Motherboard Based on Intel QM67/QM77 Chipset
11
SIN
3
4
RTS
SOUT
5
6
CTS
DTR
7
8
RI
GND
9
10
GND
When COM2 is set to RS232/RS422/RS485，the pins are defined as follows：
Pin
RS232
（default）
RS422
RS485
1
DCD
TX-
DATA-
2
DSR
NC
NC
3
RXD
TX+
DATA+
4
RTS
NC
NC
5
TXD
RX+
NC
6
CTS
NC
NC
7
DTR
RX-
NC
8
RI
NC
NC
9
GND
GND
GND
10
GND
GND
GND
COM_3456：
Signal Name
Pin
Signal Name
DCD3
1
2
DSR3
RXD3
3
4
RTS3
TXD3
5
6
CTS3
DTR3
7
8
RI3
GND
9
10
GND
DCD4
11
12
DSR4
RXD4
13
14
RTS4
TXD4
15
16
CTS4
DTR4
17
18
RI4
GND
19
20
GND
DCD5
21
22
DSR5