Gigabyte GA-Z77X-UP4 TH User Manual page 30

14) F_USB30 (USB 3.0/2.0 Header)
The header conforms to USB 3.0/2.0 specification and can provide two USB ports. For purchasing the
optional 3.5" front panel that provides two USB 3.0/2.0 ports, please contact the local dealer.
Prior to installing the USB front panel, be sure to turn off your computer and unplug the power cord
from the power outlet to prevent damage to the USB front panel.
15) COMA (Serial Port Header)
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.
Hardware Installation
Pin No. Definition
1 VBUS
2 SSRX1-
1
20
3 SSRX1+
4 GND
5 SSTX1-
6 SSTX1+
7 GND
8 D1-
11 10
9 D1+
10 NC
9 1
10 2
- 30 -
Pin No. Definition
11 D2+
12 D2-
13 GND
14 SSTX2+
15 SSTX2-
16 GND
17 SSRX2+
18 SSRX2-
19 VBUS
20 No Pin
Pin No. Definition
1 NDCD-
2 NSIN
3 NSOUT
4 NDTR-
5 GND
6 NDSR-
7 NRTS-
8 NCTS-
9 NRI-
10 No Pin