Gigabyte H81M-H M.2 User Manual page 15

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10) F_AUDIO (Front Panel Audio Header)
The front panel audio header supports High Definition audio (HD). You may connect your chassis front
panel audio module to this header. Make sure the wire assignments of the module connector match the
pin assignments of the motherboard header. Incorrect connection between the module connector and the
motherboard header will make the device unable to work or even damage it.
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Some chassis provide a front panel audio module that has separated connectors on each wire
instead of a single plug. For information about connecting the front panel audio module that has
different wire assignments, please contact the chassis manufacturer.
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.
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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 headers can provide one serial port via an optional COM port cable. For purchasing the optional
COM port cable, please contact the local dealer.
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2
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Pin No. Definition
1
MIC L
2
GND
3
MIC R
4
NC
5
Head Phone R
Pin No. Definition
1
Power (5V)
2
Power (5V)
3
USB DX-
4
USB DY-
5
USB DX+
Pin No. Definition
1
NDCD-
2
NSIN
3
NSOUT
4
NDTR-
5
GND
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Pin No. Definition
6
MIC Detection
7
SENSE_SEND
8
No Pin
9
Head Phone L
10
Head Phone Detection
Pin No. Definition
6
USB DY+
7
GND
8
GND
9
No Pin
10
NC
Pin No. Definition
6
NDSR-
7
NRTS-
8
NCTS-
9
NRI-
10
No Pin

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