IBASE MB968 - Manual (Page 20)

INSTALLATIONS
MB968 User’s Manual
20
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. J2
is a 20-pin header that provides interfaces for the following functions
Pin 2, 4, 6, 8: Speaker
This connector provides an interface to a speaker for audio tone
generation. An 8-ohm speaker is recommended.
Pin # Signal Name
2 SPEAKER
4 NC
6 GND
8 +5V
Pin 1, 3, 5: Power LED
The power LED indicates the status of the main power switch.
Pin # Signal Name
1 +5V
3 NC
5 GND
Pin 13, 14: ATX Power ON Switch
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
13 GND
14 Power_ON
Pin 17, 18: Reset Switch
The reset switch allows the user to reset the system without turning
the main power switch off and then on again. Orientation is not
required when making a connection to this header.
Pin # Signal Name
17 GND
18 PM_SYSRST#