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Connecting USB 2.0 Headers
Before connecting the USB 2.0 headers, observe the precautions in "Before You Begin" on
page 23. See Figure 20, D on page 39 for the location of the black USB 2.0 headers. Table 8
shows the pin assignments for the USB 2.0 headers.
Table 8.
USB 2.0 Header Signal Names
Pin
Signal name
1
Power
3
D-
5
D+
7
Ground
9
Key
Note: USB ports may be assigned as needed.
Connecting IEEE 1394a Headers
Before connecting the IEEE 1394a headers, observe the precautions in "Before You Begin" on
page 23. See Figure 20, E on page 39 for the location of the blue IEEE 1394a headers.
Table 9 shows the pin assignments for the headers.
Table 9.
IEEE 1394a Header Signal Names
Pin
Signal Name
1
TPA1+
3
Ground
5
TPA2+
7
+12 V
9
Key (no pin)
Connecting the Front Panel Header
Before connecting the front panel header, observe the precautions in "Before You Begin" on
page 23. See Figure 20, C on page 39 for the location of the multi-colored front panel header.
Table 10 shows the pin assignments for the front panel header.
Table 10.
Front Panel Header Signal Names
Pin Signal
Hard Drive Activity LED (Orange)
1
HD_PWR
3
HDA#
Reset Switch (Purple)
5
Ground
7
FP_RESET#
9
N/C
USB Port A
In/Out
Description
Out
Hard disk LED pull-
up (330 Ω) to +5 V
Out
Hard disk active LED
Ground
In
Reset switch
Not connected
Installing and Replacing Desktop Board Components
USB Port B
Pin
Signal name
2
Power
4
D-
6
D+
8
Ground
10
No connect
Pin
Signal Name
2
TPA1-
4
Ground
6
TPA2-
8
+12 V
10
Ground
Pin Signal
Power LED (Green)
2
HDR_BLNK_GRN Out
4
HDR_BLNK_YEL
On/Off Switch (Red)
6
SWITCH_ON#
8
Ground
10
No pin
In/Out
Description
Front panel green
LED
Out
Front panel yellow
LED
In
Power switch
Ground
No pin
41
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