General Description

The ICS9248-199 is a single chip clock solution for desktop designs using the Intel Brookdale chipset with PC133 or DDR memory. It provides all necessary clock signals for such a system.

Features:

• Programmable output frequency.

• Programmable output divider ratios.

• Programmable output rise/fall time.

• Programmable output skew.

• Programmable spread percentage for EMI control.

• Watchdog timer technology to reset system if system malfunctions.

• Programmable watch dog safe frequency.

• Support I2C Index read/write and block read/write operations.

• Uses external 14.318MHz crystal.

Output Features:

• 1 - CPU @ 2.5V

• 1 - Differential pair open drain CPU clock

• 1 - IOAPIC @ 2.5V

• 1 - SDRAM @ 3.3V

• 6- PCI @3.3V

• 2 - AGP @ 3.3V

• 1- 48MHz, @3.3V fixed

• 1- 24/48MHz, @3.3V selectable by I2C (Default is 24MHz)

• 2- REF @3.3V, 14.318MHz