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J2: System Function Connector
J2 provides connectors for system indicators that provide light indication
of the computer activities and switches to change the computer status. J1
is a 20-pin header that provides interfaces for the following functions.
Hard Disk Drive LED
Reset Switch
Not Defined
ATX Power On Switch
SMI / Hardware Switch
Power LED
Speaker
Speaker: Pins 1 - 4
This connector provides an interface to a speaker for audio
tone generation. An 8-ohm speaker is recommended.
Pin # Signal Name
1 Speaker out
2 No connect
3 Ground
4 +5V
Power LED: Pins 11 - 15
The power LED indicates the status of the main power
switch.
Pin # Signal Name
11 Power LED
12 No connect
13 Ground
14 No connect
15 Ground
IB940 User’s Manual 17