Intel Desktop Board Product Guide

Installing and Replacing Desktop Board Components

IEEE 1394a Header

See Figure 22, C for the location of the IEEE 1394a header. Table 8 shows the pin

assignments for the header.

Table 8. IEEE 1394a Header Signal Names

Pin Signal Name Pin Signal Name

1 TPA1+ 2 TPA1-

3 Ground 4 Ground

5 TPA2+ 6 TPA2-

7 +12 V 8 +12 V

9 Key (no pin) 10 Ground

Front Panel Header

See Figure 22, D for the location of the front panel header. Table 9 shows the pin

assignments for the front panel header.

Table 9. Front Panel Header Signal Names

Pin Signal Name 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 22, E 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 10

shows

the p

in assignments for the alternate front panel header.

Table 10. 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