Chapter
1
Motherboard
Description
10
POW-LED (Power LED Connector)
This connector can be attached to an LED on the front panel of a
computer case. The LED will illuminate while the computer is powered
on.
HLED (Hard Drive LED Connector)
This connector can be attached to an LED on the front panel of a
computer case. The LED will flicker during disk activity. This disk
activity only applies to those IDE drives directly attached to the system
board.
IR (Infrared Connector)
This connector is used to attach to an infrared sensing device. After the
IrDA interface is configured, connectionless data transfer to and from
portable devices such as laptops, PDAs is possible.
SLP (Sleep/Green Button)
This connector is used to conserve energy by powering down the
monitor and the hard disk when not in use. To configure this option,
you need to connect a button from the front panel to this connector.
Depressing the button will power down the monitor and hard drives
until the system is invoked by any keyboard activity, mouse activity,
modem activity or when the sleep button is depressed again. APM
(Advanced Power Management) must be enabled in the system BIOS
and the APM driver must be loaded.
ON/OFF (Power Button)
This connector can be attached to a front panel power switch. The
switch must pull the Power Button pin to ground for at least 50 ms to
signal the power supply to switch on or off. (The time required is due to
internal debounce circuitry on the system board). At least two seconds
must pass before the power supply will recognize another on/off signal.
