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INSTALLATIONS
MB894 User’s Manual
21
J19: System Function Connector
J19 provides connectors for system indicators that provide light
indication of the computer activities and switches to change the
computer status. J5 is a 16-pin header that provides interfaces for the
following functions.
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 9-11
The indicates the status of the main power switch.
Pin #
Signal Name
9
Power LED
10
NC
11
Ground
ATX Power ON Switch: Pins 5 and 13
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.
Pin #
Signal Name
5
PS_ON
13
Ground
SMI/Hardware Switch: Pins 6 and 14
This connector supports the "Green Switch" on the control
panel, which, when pressed, will force the system into the
power-saving mode immediately.
Pin #
Signal Name
6
SMI
14
Ground
Summary of Contents for MB894
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Page 23: ...INSTALLATIONS MB894 User s Manual 19...
Page 30: ...INSTALLATIONS 26 MB894 User s Manual call Write_Reg watchdog enabled...
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