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ICS94211 - Programmable System Frequency Generator

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.

The ICS94211 belongs to ICS new generation of programmable system clock generators.

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. 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.
  • W.

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Full PDF Text Transcription

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Integrated Circuit Systems, Inc. ICS94211 Programmable System Frequency Generator for PII/III™ Recommended Application: 440BX/VIA Apollo Pro133/ ALI 1631 style chipset. 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. 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.
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