Pin Definition

Motherboard Pin Denition
1-11
• SystempowerLED(4-pin+PWR_LED-)
This 2-pin connector is for the system power LED.
Connect the chassis power LED cable to this
connector. The system power LED lights up when
you turn on the system power, and blinks when the
system is in sleep mode.
• HarddiskdriveactivityLED(2-pin+HDD_LED-)
This 2-pin connector is for the HDD Activity LED.
Connect the HDD Activity LED cable to this
connector.TheHDDLEDlightsuporasheswhen
data is read from or written to the HDD.
• Systemwarningspeaker(4-pinSPEAKER)
This 4-pin connector is for the chassis-mounted system warning speaker. The
speaker allows you to hear system beeps and warnings.
• ATXpowerbutton/soft-offbutton(2-pinPWR_SW)
This connector is for the system power button. Pressing the power button turns
the system on or puts the system in sleep or soft-off mode depending on the
operating system settings. Pressing the power switch for more than four seconds
while the system is ON turns the system OFF.
• Resetbutton(2-pinRESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot
without turning off the system power.
System panel connector (20-5 pin PANEL)
This connector supports several chassis-mounted
functions.
PLED+ PLED- PWR Ground +5V_SPKO Ground Ground Speaker
HDD_LED+
HDD_LED-
Ground
RESET
NC
PLED+
PLED-
PIN 1
+PWR_LED-
+PWR_LED-
SPEAKER
PANEL
+HDD_LED-
PWR_SW
RESET
* Requires an ATX power supply