Gigabyte GA-B75M-HD3 Manual - Page 20

F_USB1/F_USB2 USB 2.0/1.1 Headers, COM Serial Port Header, COM port cable

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11) 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 Pin No. 1 2 3 4 5 6 7 8 9 10 Definition Power (5V) Power (5V) USB DXUSB DYUSB DX+ USB DY+ GND GND No Pin NC •• Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB 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. 12) 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. 9 1 10 2 Pin No. 1 2 3 4 5 6 7 8 9 10 Definition NDCDNSIN NSOUT NDTRGND NDSRNRTSNCTSNRINo Pin - 20 -

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11) 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.
•
Do not plug the IEEE 1394 bracket (2x5-pin) cable into the USB 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.
10
9
2
1
Pin No.
Definition
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
12) 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.
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