Gigabyte GA-H110TN - Page 20

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20) SPEAKER (Buzzer Header)
Connects to the buzzer on the chassis front panel. The system reports system startup status by issuing a
beep code. One single short beep will be heard if no problem is detected at system startup.
Pin No. Denition
1 VCC
2 NC
3 NC
4 SPK-
DEBUG PORT
G.QBOFM
1
21) 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 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.
22) COMA/COMB (Serial Port Headers)
Each 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 NDSR-
3 NSIN
4 NRTS-
5 NSOUT
6 NCTS-
7 NDTR-
8 12V_5V
9 GND
10 NC
1
2
9
10
1
2
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