Intel DH55HC - Manual (Page 49)

Installing and Replacing Desktop Board Components
49
Pin Standard Signal Name ECP Signal Name EPP Signal Name
23 PERROR PE, ACKREVERSE# PE
24 GROUND GROUND GROUND
25 SELECT SELECT SELECT
26 KEY (no pin) KEY (no pin) KEY (no pin)
Chassis Intrusion Header
Figure 23, E shows the location of the chassis intrusion header. This header can be
connected to a mechanical switch on the chassis to detect if the chassis cover is
removed. This switch should be in the open position when the chassis cover is
installed and closed when the cover is removed.
Table 9 shows the pin assignments and signal names for the chassis intrusion header.
Table 9. Chassis Intrusion Header Signal Names
Pin Description
1
Intruder#
2 Ground
Intel ® RPAT Header
Figure 23, F shows the location of the Intel RPAT header. Table 10 shows the pin
assignments and signal names for the Intel RPAT header.
Table 10. Intel RPAT Header Signal Names
Pin Description
1
RPAT#
2 Ground
Alternate Front Panel Power LED Header
Figure 23, G 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 11
shows the pin assignments for the alternate front panel header.
Table 11. Alternate Front Panel Power LED Header Signal Names
Pin Signal Name In/Out
1 Front panel LED+ Out
2 No pin
3 Front panel LED- Out