IBM PC MMX Pentium HS-4500, Manual, Page: 25 / 51

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3.4 Front Panel Connector
The onboard front panel connector CN2 provides a multi connection to
Reset Button, WDT Indicator, Speaker Connector and IDE-Drive’s
Activity Indicator.
A ON between pin-7 and pin-8 may cause a Hardware Reset cycle to
system. The Reset Button may connection to pin-7 and pin-8. Normal
OFF is necessary for operating.
The pin-5 and pin-6 provides a WDT ( Watch-Dog Timer ) Indicator for
the user application. It may also to used as an control signal in WDT
activity control.
The pin-3 and pin-4 provides a Speaker out put connection for extra
sound out.
The pin-1 and pin-2 provides a IDE-Drive’s Activity Indicator connection
to a LED for indicate the IDE-Drive activity status. A light ON says
Activity.
z
CN2 : Front Panel Connector
PIN NO. DESCRIPTION Input / Output
1 IDE-Drive’s Indicator Output
2 VCC Power Vcc
3 Speaker-Out Output
4 GND
Power Ground
5 GND Power Ground
6 WDT Indicator Output
7 GND Power Ground
8 Reset Button Input