Gigabyte A520M S2H User Manual - Page 18

COM Serial Port Header, SPEAKER Speaker Header, CI Chassis Intrusion Header

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14) 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 Definition NDCDNSIN NSOUT NDTRGND Pin No. 6 7 8 9 10 Definition NDSRNRTSNCTSNRINo Pin 15) SPEAKER (Speaker Header) Connects to the speaker 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. Definition 1 1 VCC 2 NC 3 NC 4 SPK- 16) CI (Chassis Intrusion Header) This motherboard provides a chassis detection feature that detects if the chassis cover has been removed. This function requires a chassis with chassis intrusion detection design. Pin No. Definition 1 1 Signal 2 GND - 18 -

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14) 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
Pin No.
Definition
1
NDCD-
6
NDSR-
2
NSIN
7
NRTS-
3
NSOUT
8
NCTS-
4
NDTR-
9
NRI-
5
GND
10
No Pin
10
9
2
1
15) SPEAKER (Speaker Header)
Connects to the speaker 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.
Definition
1
VCC
2
NC
3
NC
4
SPK-
1
16) CI (Chassis Intrusion Header)
This motherboard provides a chassis detection feature that detects if the chassis cover has been removed.
This function requires a chassis with chassis intrusion detection design.
1
Pin No.
Definition
1
Signal
2
GND
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