ECS Elitegroup A55F-M4 (V2.0) [27/76] A55f m4 user manual

Chapter 2

A55F-M4 USER MANUAL

This concludes Chapter 2. The next chapter covers the BIOS.

Hard Drive Activity LED

Connecting pins 1 and 3 to a front panel mounted LED provides visual indication that

data is being read from or written to the hard drive. For the LED to function properly,

an IDE drive should be connected to the onboard IDE interface. The LED will also

show activity for devices connected to the SCSI (hard drive activity LED) connector.

Power/Sleep/Message waiting LED

Connecting pins 2 and 4 to a single or dual-color, front panel mounted LED provides

power on/off, sleep, and message waiting indication.

Reset Switch

Supporting the reset function requires connecting pin 5 and 7 to a momentary-con-

tact switch that is normally open. When the switch is closed, the board resets and

runs POST.

Power Switch

Supporting the power on/off function requires connecting pins 6 and 8 to a momen-

tary-contact switch that is normally open. The switch should maintain contact for at

least 50 ms to signal the power supply to switch on or off. The time requirement is

due to internal de-bounce circuitry. After receiving a power on/off signal, at least

two seconds elapses before the power supply recognizes another on/off signal.

5. Front Panel Header

The front panel header (F_PANEL) provides a standard set of switch and LED headers

commonly found on ATX or Micro ATX cases. Refer to the table below for information: