Gpio Header (Cn25); Com1 Connector (Com1) - AXIOMTEK IMB520R User Manual

2.5.3

GPIO Header (CN25)

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