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IMB520R / 521R LGA1151 ATX Motherboard
Board and Pin Assignments
13
2.5.3
GPIO Header (CN25)
This header (5x2-pin p=2.00mm) is for digital I/O interface.
Note
The default value of DIO1 to DIO8 is set as GPI with high level.
2.5.4
COM1 Connector (COM1)
This is a high rise 9-pin D-Sub connector for COM1 serial port interface. The pin
assignments of RS-232/422/485 are listed in the table below.
Note
[*]
: Signals of COM1 can be RS-232/422/485 by selecting JP4, JP5 and JP6
(see section 2.4.3).
Pin Signal
Pin
Signal
1
DIO1
2
DIO8
3
DIO2
4
DIO7
5
DIO3
6
DIO6
7
DIO4
8
DIO5
9
NC
10
GND
Pin RS-232
[*]
RS-422
[*]
RS-485
[*]
1
DCD#
TX-
485-
2
RXD
TX+
485+
3
TXD
RX+
N/C
4
DTR#
RX-
N/C
5
GND
GND
GND
6
DSR#
N/C
N/C
7
RTS#
N/C
N/C
8
CTS#
N/C
N/C
9
RI#
N/C
N/C
2 4 6 8 10
1 3 5 7 9
註解
[t1]:
去除底線與顏色