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
Hard Drive Activity LED
1
HD_PWR
3
HDA#
5
Ground
7
FP_RESET#
9
+5 V
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
In/
Out
Description
Out
Hard disk LED pull-up
to +5 V
Out
Hard disk active LED
Reset Switch
Ground
In
Reset switch
Power
Power
In/
Pin
Signal
Out
Power LED
2
HDR_BLNK_
Out
GRN
4
HDR_BLNK_
Out
YEL
On/Off Switch
6
FPBUT_IN
In
8
Ground
Not Connected
10
N/C
Technical Reference
Description
Front panel green
LED
Front panel yellow
LED
Power switch
Ground
Not connected
47