Gigabyte GA-Q57M-S2H Manual - Page 29
F_USB1/F_USB2/F_USB3 USB Headers, COMA/COMB Serial Port Header, tional COM port cable
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13) F_USB1/F_USB2/F_USB3 (USB 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. Pin No. Definition 1 Power (5V) 9 1 10 2 2 Power (5V) 3 USB DX4 USB DY- 5 USB DX+ 6 USB DY+ 7 GND 8 GND 9 No Pin 10 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. 14) COMA/COMB (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 9 1 10 2 3 NSOUT 4 NDTR- 5 GND 6 NDSR- 7 NRTS- 8 NCTS- 9 NRI- 10 No Pin - 29 - Hardware Installation