Intel DG35EC Product Guide - Page 47

Alternate Front Panel Power LED Header, USB 2.0 Headers, Table 10. USB 2.0 Header Signal Names

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Installing and Replacing Desktop Board Components Alternate Front Panel Power LED Header Figure 23, 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 Pin Description 1 Front panel green LED 2 No pin 3 Front panel yellow LED In/Out Out Out USB 2.0 Headers See Figure 23, G for the location of the three USB 2.0 headers. Table 10 shows the pin assignments 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. 47

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Installing and Replacing Desktop Board Components
47
Alternate Front Panel Power LED Header
Figure 23, 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
Pin
Description
In/Out
1
Front panel green LED
Out
2
No pin
3
Front panel yellow LED
Out
USB 2.0 Headers
See Figure 23, G for the location of the three USB 2.0 headers.
Table 10 shows the
pin assignments 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.