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Hard Drive
Activity LED
2.7.2.4.1
Hard Drive Activity LED Connector [Orange]
Pins 1 and 3 [Orange] can be connected to an LED to provide a visual indicator that data is being
read from or written to a hard drive. Proper LED function requires one of the following:
•
A Serial ATA hard drive connected to an onboard Serial ATA connector
•
An IDE hard drive connected to an onboard IDE connector
2.7.2.4.2
Reset Switch Connector [Blue]
Pins 5 and 7 [Blue] can be connected to a momentary single pole, single throw (SPST) type switch
that is normally open. When the switch is closed, the board resets and runs the POST.
2.7.2.4.3
Power/Sleep LED Connector [Green]
Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 26 shows the possible
states for a one-color LED. Table 27 shows the possible states for a two-color LED.
Table 26.
States for a One-Color Power LED
LED State
Off
Steady Green
Table 27.
States for a Two-Color Power LED
LED State
Off
Steady Green
Steady Yellow
+
1
−
3
5
Reset
Switch
7
9
+5 V DC
Figure 8. Connection Diagram for Front Panel Connector
Description
Power off/sleeping
Running
Description
Power off
Running
Sleeping
Single-colored
Power LED
+
2
−
4
6
Power
Switch
8
N/C
Technical Reference
Dual-colored
Power LED
−
+
OM18249
49
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