Gigabyte GA-B85M-HD3 R4 - Page 16

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10) F_USB1/2 (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 Pin No. Denition
1 Power (5V) 6 USB DY+
2 Power (5V) 7 GND
3 USB DX- 8 GND
4 USB DY- 9 No Pin
5 USB DX+ 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.
10
9
2
1
11) COMA/COMB (Serial Port Headers)
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 Pin No. Denition
1 NDCD- 6 NDSR-
2 NSIN 7 NRTS-
3 NSOUT 8 NCTS-
4 NDTR- 9 NRI-
5 GND 10 No Pin
12) LPT (Parallel Port Header)
The LPT header can provide one parallel port via an optional LPT port cable. For purchasing the optional
LPT port cable, please contact the local dealer.
Pin No. Denition Pin No. Denition
1 STB- 14 GND
2 AFD- 15 PD6
3 PD0 16 GND
4 ERR- 17 PD7
5 PD1 18 GND
6 INIT- 19 ACK-
7 PD2 20 GND
8 SLIN- 21 BUSY
9 PD3 22 GND
10 GND 23 PE
11 PD4 24 No Pin
12 GND 25 SLCT
13 PD5 26 GND
26
25
2
1
DEBUG
PORT
G.QBOFM
10
9
2
1
9
1
10
2