22 serial port connector, rs-422/485 – IEI Integration IMBA-Q870-i2 User Manual
Page 58
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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.
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