Power/Sleep Led; Hard Drive Activity Led; Infrared Port; Power Switch - Intel MS440GX Product Manual

MS440GX Motherboard Product Guide

Power/Sleep LED

These pins can be connected to a multicolor LED that lights when the computer is powered on or
in sleep mode. The possible states for this LED are:
If state = OFF, then Power is OFF.
If state = GREEN, then Power is ON.
If state = YELLOW, then in Sleep Mode.

Hard Drive Activity LED

These pins can be connected to an LED to provide a visual indicator that data is being read from or
written to an IDE or SCSI hard drive, as well as add-in cards that provide an activity signal. For
the LED to function properly, the IDE drive must be connected to the onboard IDE controller.
This LED will also show activity for devices connected the the hard drive LED header.

Infrared Port

Serial Port 2 can be configured to support an IrDA module connected to the front panel infrared
connector. After the IrDA interface is configured, files can be transferred to or from portable
devices such as laptop computers, PDAs, and printers using application software.

Power Switch

Pins 26 and 27 can be connected to a front panel power switch. Because of debounce circuitry on
the motherboard, the switch must pull the SW_ON# pin to ground for at least 50 ms to signal the
power supply to switch on or off. At least two seconds must pass before the power supply will
recognize another on/off signal.
NOTE
When BIOS is active, the power switch is recognized immediately. When BIOS is not active
(POST, system lock-up) then the power switch is only recognized if held in for four seconds.
CAUTION
If you need to turn off the computer during POST, then hold the power switch in for four seconds;
otherwise the computer will not switch off.
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