Datasheet

Technical Reference
57
2.6.2.4 Front Panel Connector
This section describes the functions of the front panel connector. Table 24 lists the signal names of
the front panel connector. Figure 17 is a connection diagram for the front panel connector.
Table 24. Front Panel Connector
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED
[Orange]
Power LED
[Green]
1 HD_PWR Out Hard disk LED pull-up
(750 Ω) to +5 V
2 HDR_BLNK_
GRN
Out Front panel green
LED
3 HAD# Out Hard disk active LED 4 HDR_BLNK_
YEL
Out Front panel yellow
LED
Reset Switch
[Blue]
On/Off Switch
[Red]
5 Ground Ground 6 FPBUT_IN In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
Power Not Connected
9 +5 V Power 10 N/C Not connected
Blue
OM18250
Hard Drive
Activity LED
Reset
Switch
+5 V DCN/C
Power
Switch
8
6
4
2
9
7
5
3
1
−
+
Single-colored
Power LED
−
+
Dual-colored
Power LED
+
−
Orange Green Red
Figure 17. Connection Diagram for Front Panel Connector
2.6.2.4.1 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