Installing and Replacing Desktop Board Components
43
USB 2.0 Headers
See Figure 22, A for the location of the black USB 2.0 headers. Table 8 shows the pin assignments
for the headers.
Table 8.
USB 2.0 Header Signal Names
USB Port A
USB Port B
Pin
Signal Name
Pin
Signal Name
1 Power
2 Power
3 D-
4 D-
5 D+
6 D+
7 Ground
8 Ground
9 Key
10
No
connect
Note: USB ports may be assigned as needed.
Front Panel Header
Figure 22, C on page 41 shows the location of the multi-colored front panel header. Table 9 shows
the pin assignments for the front panel header.
Table 9.
Front Panel Header Signal Names
Pin Signal
In/Out Description
Pin Signal
In/Out Description
Hard Drive Activity LED (Yellow)
Power LED (Green)
1
HD_PWR
Out
Hard disk LED pull-
up (330
Ω
) 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 (Purple)
On/Off Switch (Red)
5 Ground
Ground
6 SWITCH_ON# In
Power
switch
7 FP_RESET#
In
Reset
switch
8 Ground
Ground
9
N/C
Not connected
10 No pin
Alternate Power LED Header
Figure 22, B on page 41 shows the location of the alternate power LED header. If you have a three-
pin power LED cable, connect it to this header.
Summary of Contents for D955XBK
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