Installing and Replacing Desktop Board Components
41
Connecting to the USB 2.0 Header
Before connecting to the USB 2.0 header, observe the precautions in "Before You Begin" on
page 23. See Figure 20, B on page 39 for the location of the black USB 2.0 header. Table 8 shows
the pin assignments for the USB 2.0 header.
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 GND GND Ground
9 KEY 10 NO CONNECT
Note: USB ports may be assigned as needed.
Connecting to the Front Panel Header
Before connecting to the front panel header, observe the precautions in "Before You Begin" on
page 23. See Figure 20, D 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 (Blue) On/Off Switch (Red)
5 GND Ground 6 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 GND Ground
Power (Black) Not Connected (Black)
9 + 5 V Power 10 N/C No pin
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