Gigabyte GA-990FXA-UD3 User Manual page 30

15) 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 your-
self 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.
16) TPM (Trusted Platform Module Header)
You may connect a TPM (Trusted Platform Module) to this header.
Hardware Installation
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
F_USB30
seconds.)
3. Replace the battery.
4. Plug in the power cord and restart your computer.
19
TPM
w/housing
20
Pin No. Definition Pin No. Definition
1 LCLK 11
2 GND 12
3 LFRAME 13
4 No Pin 14
5 LRESET 15
6 NC 16
7 LAD3 17
8 LAD2 18
9 VCC3 19
10 LAD1 20
- 30 -
F_AUDIO(H)
DB_PORT
1
Voltage measurement module(X58A-OC)
2
LAD0
PCIe power connector (SATA)(X58A-OC)
GND
NC
ID
SB3V
SERIRQ
GND
NC
NC
SUSCLK
BIOS Switc
1
1
PWM Swi
DIP
1 2 3