Intel 2804080, Duo/Solo 945GM user manual J3 System Function Connector, Speaker Pins 1

INSTALLATIONS

J3: System Function Connector

J3 provides connectors for system indicators that provide light indication of the computer activities and switches to change the computer status. J3 is a 20-pin header that provides interfaces for the following functions.

Hard Disk Drive LED Not Defined

Not Defined

Speaker

Reset Switch

ATX Power On Switch

Power LED

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

2

3

4

Speaker out

No connect

Ground

+5V

Power LED: Pins 11 - 15

Pin #

Signal Name

11	Power LED
12	No connect
13	Ground
14	No connect
15	Ground

ATX Power ON Switch: Pins 7 and 17

This 2-pin connector is an “ATX Power Supply On/Off Switch” on the system that connects to the power switch on the case. When pressed, the power switch will force the system to power on. When pressed again, it will force the system to power off.

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