Gigabyte GA-H97M-HD3 User Manual page 16

10) 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
DEBUG
10
PORT
11) 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.
25
26
12) BAT (Battery)
The battery provides power to keep the values (such as BIOS configurations, date, and time information)
in the CMOS when the computer is turned off. Replace the battery when the battery voltage drops to a low
level, or the CMOS values may not be accurate or may be lost.
• Always turn off your computer and unplug the power cord before replacing the battery.
• Replace the battery with an equivalent one. Danger of explosion if the battery is replaced with
an incorrect model.
• Contact the place of purchase or local dealer if you are not able to replace the battery by yourself
or uncertain about the battery model.
• When installing the battery, note the orientation of the positive side (+) and the negative side (-) of
the battery (the positive side should face up).
• Used batteries must be handled in accordance with local environmental regulations.
Pin No. Definition
1
1 NDCD-
2
2 NSIN
3 NSOUT
4 NDTR-
5 GND
Pin No. Definition
1 STB-
2 AFD-
1
3 PD0
4 ERR-
2
5 PD1
6 INIT-
7 PD2
8 SLIN-
9 PD3
You may clear the CMOS values by removing the battery:
1. Turn off your computer and unplug the power cord.
2. Gently remove the battery from the battery holder and wait for one minute. (Or use
a metal object like a screwdriver to touch the positive and negative terminals of the
battery holder, making them short for 5 seconds.)
3. Replace the battery.
4. Plug in the power cord and restart your computer.
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Pin No. Definition
6 NDSR-
7 NRTS-
8 NCTS-
9 NRI-
10 No Pin
Pin No. Definition Pin No. Definition
10 GND 19
11 PD4 20
12 GND 21
13 PD5 22
14 GND 23
15 PD6 24
16 GND 25
17 PD7 26
18 GND
ACK-
GND
BUSY
GND
PE
No Pin
SLCT
GND