Front Panel Header; Power/Sleep/Message Waiting Led; Hard Drive Activity Led - ECS B75H2-AM2 User Manual

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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 informa-
tion:
Pin
1
3
5
7
9
11
13
* MSG LED (dual color or single color)

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-
contact 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.
This concludes Chapter 2. The next chapter covers the BIOS.
Signal Function
VCC
HDD_LED Hard disk LED
GND Ground
HWRST_L Reset
FRONT PANEL
F_PANEL_DET
DETECT
NC Reserved
NC Reserved
Installing the Motherboard
Pin Signal
5V 2 GLED0
4 GLED1
6 PWRSW
8 GND
10 KEY
12 VCC
14 F_PANEL_LED
Function
MSG LED
MSG LED
POWER SWITCH
GROUND
NO PIN
5V
FRONT PANEL
LED