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ICS94229

Advance Information

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General Description

The ICS94229 is a main clock synthesizer chip for AMD-K7 based systems with VIA KT266 style chipset. This provides all

clocks required for such a system.

The ICS94229 belongs to ICS new generation of programmable system clock generators. It employs serial programming I

interface as a vehicle for changing output functions, changing output frequency, configuring output strength, configuring

output to output skew, changing spread spectrum amount, changing group divider ratio and dis/enabling individual clocks.

This device also has ICS propriety 'Watchdog Timer' technology which will reset the frequency to a safe setting if the system

become unstable from over clocking.

SRESET# Signal Description

The SRESET# signal from ICS94229 system clock generator is a real time active low pulse that can be used to reset the system.

The Open-Drain Nch output Reset# pin needs to be tied to the system reset line which has a pull-up resistor. When activated,

the SRESET# output will be driven to a low with a 288ms pulse width.