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Power Switch
Connect to a 2-pin push button switch. Pressing this button will turn the sys-
tem power on or off.
Reset Switch
The Reset Switch is used to reboot the system rather than turning the power
ON/OFF. Avoid rebooting while the HDD is working. You can connect the
Reset Switch from the system case to this pin.
Power LED
The LED is lit when the system is power on. If the system is in S1 (POS -
Power On Suspend) or S3 (STR - Suspend To RAM) state, the LED will
blink.
HDD LED
HDD LED shows the activity of a hard disk drive. Avoid turning the power off
while HDD LED is lit. Connect the HDD LED from the system case to this
pin.
SLED
The SLED is lit when the system is in the S1 (POS - Power On Suspend) state.
Speaker
The speaker from the system case is connected to this pin.
Socket 478
266E
2-15
Pin Definition
PIN
SIGNAL
1
PWR_LED+
3
PWR_LED+
5
PWR_LED-
7
SPEAKER+
9
NC
11
NC
13
SPEAKER-
15
NC
16
15
2
1
Installation
PIN
SIGNAL
2
HD_LED+
4
HD_LED-
6
PW+
8
PW-
10
RESET+
12
RESET-
14
SLED+
16
SLED-
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