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Technical Reference
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2.2.2.5 Front Panel Header
This section describes the functions of the front panel header. Table 20 lists the signal
names of the front panel header. Figure 11 is a connection diagram for the front panel
header.
Table 20.
Front Panel Header
Pin
Signal
In/
Out
Description
Pin
Signal
In/
Out
Description
Hard Drive Activity LED Power LED
1 HD_PWR Out Hard disk LED pull-up
to +5 V
2 HDR_BLNK_
GRN
Out Front panel green
LED
3 HDA# Out Hard disk active LED 4 HDR_BLNK_
YEL
Out Front panel yellow
LED
Reset Switch On/Off Switch
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
Figure 11. Connection Diagram for Front Panel Header
2.2.2.5.1 Hard Drive Activity LED Header
Pins 1 and 3 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
• A Parallel ATA IDE hard drive connected to an onboard Parallel ATA IDE connector