General Description

The ICS94211 is a single chip clock solution for desktop designs using the BX/Apollo Pro133/ALI 1631 style chipset. It provides all necessary clock signals for such a system.

Features:

• Programmable ouput frequency.

• Programmable ouput rise/fall time.

• Programmable PCICLK, PCICLK_F, SDRAM skew.

• Real time system reset output

• Spread spectrum for EMI control typically by 7dB to 8dB, with programmable spread percentage.

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

• Uses external 14.318MHz crystal.

• FS pins for frequency select

Output Features:

• 2 - CPUs @2.5V

• 1 - IOAPIC @ 2.5V

• 13 - SDRAM @ 3.3V

• 6 - PCI @3.3V,

• 1 - 48MHz, @3.3V

• 1 - 24MHz @ 3.3V

• 2 - REF @3.3V, 14.318MHz.

Recommended Application:

440BX/VIA Apollo Pro133/ ALI 1631 style chipset.