Technical Reference
47
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
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