General Description

The ICS94201 is a single chip clock solution for desktop designs using the 810/810E and Solano style chipset. It provides all necessary clock signals for such a system.

The ICS94201 belongs to ICS new generation of programmable system clock generators. It employs serial programming I2C 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.

Spread spectrum typically reduces system EMI by 7dB to 8dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding.

Output Features:

• 2 - CPUs @ 2.5V

• 13 - SDRAM @ 3.3V

• 3 - 3V66 @ 3.3V

• 8 - PCI @3.3V

• 1 - 24/48MHz@ 3.3V

• 1 - 48MHz @ 3.3V fixed

• 1 - REF @3.3V, 14.318MHz

Features:

• Programmable ouput frequency.

• Programmable ouput rise/fall time for PCI and SDRAM clocks.

• Programmable 3V66 to PCI skew.

• Spread spectrum for EMI control with programmable spread percentage.

• Watchdog timer technology to reset system if over-clocking causes malfunction.

• Support power management through PD#.

• Uses external 14.318MHz crystal.

• FS pins for frequency select

Recommended Application:

810/810E and Solano (815) type chipset