Intel BLKDX79TO manual USB 2.0 Headers, Front Panel Header, USB 2.0 Header Signal Names

Intel Desktop Board DX79TO Product Guide

USB 2.0 Headers

Figure 20, E shows the location of the USB 2.0 headers. Table 11 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 11. USB 2.0 Header Signal Names

	USB Port A
Pin	Signal Name
1	Power (+5 V)
3	D-
5	D+

7Ground

9Key

	USB Port B
Pin	Signal Name
2	Power (+5 V)
4	D-
6	D+
8	Ground
10	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.

Front Panel Header

Figure 20, G shows the location of the front panel header. Table 12 shows the pin assignments and signal names for the front panel header.

Table 12. Front Panel Header Signal Names

Pin	Description	In/Out	Pin	Description	In/Out
	Hard Drive Activity LED			Power LED
1	Hard disk LED pull-up to +5 V	Out	2	Front panel green LED	Out
3	Hard disk active LED	Out	4	Front panel yellow LED	Out
	Reset Switch			On/Off Switch
5	Ground		6	Power switch	In
7	Reset switch	In	8	Ground
	Power			Not Connected
9	Power	Out	10	No pin

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