2. Installation
2.5.10.2 SMI Suspend Switch & ATX Power Switch (J22, pins 10-12)
Marked as ”PS-ON” on the motherboard, this switch supports
different modes of operation, in conjunction with a standard ATX-
type power supply.
A push-button switch connected to this lead controls the system
power. Pushing the button once will turn on the system and pushing
another time will turn it off. The system power LED shows the
system's on/off power status. If Power Management is enabled under
BIOS setup, this allows the user to manually place the system into a
suspend mode (often called “green mode”) where system activity will
be instantly decreased to save electricity and prolong the life of
certain components when the system is not in use. In this case, the
user must press and hold the Power Switch for a preset
delay period
to turn the system power off completely. The
delay
and other Power
Management parameters are determined in BIOS Setup.
This connection does not have a function when a standard power
supply is used
NOTE:
If the power to the ATX power supply is interrupted while
the motherboard is on, standby power will remember that the
motherboard should be on and boot the computer when power is
reapplied to the ATX power supply.
EP-PT21 User’s Manual
i
J22
PS ON
(pins 10-12)
