Gigabyte B550 VISION D User Manual page 22

17) F_U32 (USB 3.2 Gen 1 Header)
The header conforms to USB 3.2 Gen 1 and USB 2.0 specification and can provide two USB ports. For
purchasing the optional 3.5" front panel that provides two USB 3.2 Gen 1 ports, please contact the local
dealer.
1 10
20 11
18) F_USB1/F_USB2 (USB 2.0/1.1 Headers)
The headers conform to USB 2.0/1.1 specification. Each USB header can provide two USB ports via an
optional USB bracket. For purchasing the optional USB bracket, please contact the local dealer.
9 1
10 2
• Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB 2.0/1.1 header.
• 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.
19) 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.
1 2
9 10
Pin No. Definition Pin No. Definition
1 VBUS 8
2 SSRX1- 9
3 SSRX1+ 10
4 GND 11
5 SSTX1- 12
6 SSTX1+ 13
7 GND 14
Pin No. Definition Pin No. Definition
1 Power (5V) 6
2 Power (5V) 7
3 USB DX- 8
4 USB DY- 9
5 USB DX+ 10
Pin No. Definition Pin No. Definition
1 NDCD- 6
2 NSIN 7
3 NSOUT 8
4 NDTR- 9
5 GND 10
- 22 -
Pin No. Definition
D1- 15 SSTX2-
D1+ 16 GND
NC 17 SSRX2+
D2+ 18 SSRX2-
D2- 19 VBUS
GND 20 No Pin
SSTX2+
USB DY+
GND
GND
No Pin
NC
NDSR-
NRTS-
NCTS-
NRI-
No Pin