User`s manual

FR550
3-14
Pin Signal Name
1 LED+
2 LED-
3 LED-
4 LED+
3.5.8 Reset Switch Connector (2-pin) (J16)
This connector supports the front pannel case-mounted reset. It is advised that the reset switch
be used for rebooting the system in order to extend the life of the system’s power supply.
Pin Signal Name
1 Reset
2 Ground
3.5.9 Speaker Connector (4-pin) (J17)
A 1x4 straight header is available to drive a chassis-mounted speaker if desired.
Pin Signal Name
1 Speaker+
2 No connect
3 No connect
4 Speaker-
3.5.10 IrDA connector (6-pin) (J11)
The FR550 mainboard offers an IrDA function. The case must reserve space for the IR
module if you want to use the IrDA function. This connector supports optional wireless
transmission and reception of infrared data. The module mounts in a small opening on the
system case that supports this feature. The efficient distance is 100cm and the transfer rate is
1.44M KB/sec.