GIGA-BYTE TECHNOLOGY GA-Z270X-UD5, Руководство пользователя, Страница: 37 / 136

- 37 - Hardware Installation
18) USB20_OB (USB 2.0/1.1 Port)
The USB port makes it easier to save data, flash the BIOS or install software in open bench testing platforms
for simply pretesting the PC before final component installation inside a case scenarios where accessing
the rear panel IO can be an inconvenience.
19) COMA/COMB (Serial Port Headers)
The COM header can provide one serial port via an optional COM port cable. For purchasing the optional
COM port cable, please contact the local dealer.
Pin No. Definition
1 NDCD-
2 NSIN
3 NSOUT
4 NDTR-
5 GND
6 NDSR-
7 NRTS-
8 NCTS-
9 NRI-
10 No Pin
10
9
2
1
F_USB30
F_ U
B_
F_ F_
_
B
B S_
B
S B_
B
_ S
S_
_
B
_ U
_
B
S
12
3
12 3
12
3
1 2 3
1
1
1
1
B S S
S
_S
S S U
1 2 3 4 5
S 3
B S S S
U
_ _ 3
F_USB3 F
S _
S _
S _
S F
B_
B_
F
_ 0
S
S
_ 0 F
_ F
_
_
_ _B
U
S _S
_
USB 0_ B
B_