Installing and Replacing Desktop Board Components
47
Front Panel Header
See Figure 22, C for the location of the front panel header. Table 8 shows the pin
assignments for the front panel header.
Table 8. Front Panel Header Signal Names
Pin Signal
Name
In/Out Pin Signal
Name
In/Out
Hard Drive Activity LED
Power LED
1
Hard disk LED pull-up to +5 V Out
2
Front panel green LED
Out
3
Hard disk active LED
Out
4
Front panel yellow LED
Out
Reset Switch
On/Off Switch
5 Ground
6 Power
switch
In
7 Reset
switch
In
8 Ground
Power
Not Connected
9 Power
Out 10
No
pin
Alternate Front Panel Power LED Header
Figure 22, D shows the location of the alternate front panel power LED header. Pins 1
and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. If
your chassis has a three-pin power LED cable, connect it to this header. Table 9
shows the pin assignments for the alternate front panel header.
Table 9. Alternate Front Panel Power LED Header Signal Names
Pin Signal
Name
In/Out
1
Front panel green LED
Out
2 No
pin
3
Front panel yellow LED
Out
HD Audio Link Header
See Figure 22, E for the location of the HD Audio Link header. Table 10 shows the pin
assignments for the header.
Table 10. HD Audio Link Header Signal Names
Pin Signal
Name
Pin Signal
Name
1
BCLK
2
Ground
3 RST#
4 3.3
Vcc
5 SYNC
6 Ground
7 SDO
8 3.3
Vcc
9 SDI0
10
+12
V
11 SDI1
12 Key
13
No Connection
14
3.3 V STBY
15 No
Connection
16 Ground
