Intel Complete Guide to the IEEE 1394a Header and Its Pin Assignments

Installing and Replacing Desktop Board Components

Front Panel Header

Figure 24, A on page 44 shows the location of the multi-colored front panel header. Table 5 shows the pin assignments for the front panel header.

Table 5. 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

Alternate Front Panel Power LED Header

Figure 24, B on page 44 shows the location of the alternate front panel power LED header. If you have a three-pin power LED cable, connect it to this header.

IEEE 1394a Header

See Figure 24, C for the location of the blue IEEE 1394a header. Table 6 shows the pin assignments for the header.

Table 6. IEEE 1394a Header Signal Names

Pin	Signal Name
1	TPA1+
3	Ground

5TPA2+

7+12 V

9Key (no pin)

Pin	Signal Name
2	TPA1-
4	Ground

6TPA2-

8+12 V

10Ground

45