Intel DP55KG Product Guide - Page 53

Alternate Front Panel Power LED Header, USB 2.0 Headers

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Installing and Replacing Desktop Board Components Alternate Front Panel Power LED Header Figure 27, F 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 1 Front panel green LED 2 No pin 3 Front panel yellow LED In/Out Out Out USB 2.0 Headers Figure 27, G shows the location of the USB 2.0 headers. Table 10 shows the pin assignments and signal names for each USB 2.0 header. Each USB header can be used to connect two USB devices. Table 10. USB 2.0 Header Signal Names USB Port A Pin Signal Name Pin 1 Power (+5 V) 2 3 D- 4 5 D+ 6 7 Ground 8 9 Key 10 Note: USB ports may be assigned as needed. USB Port B Signal Name Power (+5 V) DD+ Ground No Connection NOTE Computer systems that have an unshielded cable attached to a USB port might not meet FCC Class B requirements, even if no device or a low-speed USB device is attached to the cable. Use a shielded cable that meets the requirements for a full-speed USB device. 53

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Installing and Replacing Desktop Board Components
53
Alternate Front Panel Power LED Header
Figure 27, F 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
USB 2.0 Headers
Figure 27, G shows the location of the USB 2.0 headers.
Table 10 shows the pin
assignments and signal names for each USB 2.0 header.
Each USB header can be
used to connect two USB devices.
Table 10. USB 2.0 Header Signal Names
USB Port A
USB Port B
Pin
Signal Name
Pin
Signal Name
1
Power (+5 V)
2
Power (+5 V)
3
D-
4
D-
5
D+
6
D+
7
Ground
8
Ground
9
Key
10
No Connection
Note:
USB ports may be assigned as needed.
NOTE
Computer systems that have an unshielded cable attached to a USB port might not
meet FCC Class B requirements, even if no device or a low-speed USB device is
attached to the cable.
Use a shielded cable that meets the requirements for a
full-speed USB device.