Gigabyte Z790 D DDR4 [30/42] F_usb1 f_usb2 usb 2 1 headers

- 30 -

16) F_USB1/F_USB2 (USB 2.0/1.1 Headers)

The headers conform to USB 2.0/1.1 specication. Each USB header can provide two USB ports via an

optional USB bracket. For purchasing the optional USB bracket, please contact the local dealer.

Pin No. Denition

1 Power (5V)

2 Power (5V)

3 USB DX-

4 USB DY-

5 USB DX+

6 USB DY+

7 GND

8 GND

9 No Pin

10 NC

DEBUG

PORT

G.QBOFM

Prior to installing the USB bracket, be sure to turn off your computer and unplug the power cord

from the power outlet to prevent damage to the USB bracket.

17) COM (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.

Pin No. Denition

1 NDCD-

2 NSIN

3 NSOUT

4 NDTR-

5 GND

6 NDSR-

7 NRTS-

8 NCTS-

9 NRI-

10 No Pin