Installing and Replacing Desktop Board Components
41
Connecting IEEE 1394a Headers
Before connecting the IEEE 1394a headers, observe the precautions in "Before You Begin" on
page 23. See Figure 20, B on page 39 for the location of the blue IEEE 1394a headers. Table 8
shows the pin assignments for the headers.
Table 8.
IEEE 1394a Header Signal Names
Pin Signal
Name
Pin Signal
Name
1 TPA1+
2 TPA1-
3 Ground
4 Ground
5 TPA2+
6 TPA2-
7 +12
V
8 +12
V
9
Key (no pin)
10
Ground
Connecting the Front Panel Header
Before connecting the front panel header, observe the precautions in "Before You Begin" on
page 23. See Figure 20, E on page 39 for 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 (Orange)
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 5+
V
Reserved. Do not use.
10 No pin
No pin
Connecting Hi-Speed USB 2.0 Headers
Before connecting the USB 2.0 headers, observe the precautions in "Before You Begin" on
page 23. See Figure 20, F on page 39 for the location of the black USB 2.0 headers.
Table 10 shows the pin assignments for the headers.
Table 10. Hi-Speed 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.
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