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W144 - 440BX AGPset Spread Spectrum Frequency Synthesizer

General Description

Free-running CPU Clock: Output voltage swing is controlled by the voltage applied to VDDQ2.

See Tables 2 and 6 for detailed frequency information.

CPU Clock Output 1: This CPU clock output is controlled by the CLK_STOP# control pin.

Key Features

  • Maximized EMI suppression using Cypress’s Spread Spectrum technology.
  • Single chip system frequency synthesizer for Intel® 440BX AGPset.
  • Two copies of CPU output.
  • Six copies of PCI output.
  • One 48-MHz output for USB.
  • One 24-MHz output for SIO.
  • Two buffered reference outputs.
  • One IOAPIC output.
  • Thirteen SDRAM outputs provide support for 3 DIMMs.
  • Supports frequencies up to 150 MHz.
  • I2C™ interface for.

📥 Download Datasheet

Datasheet Details

Part number W144
Manufacturer Cypress (Infineon)
File Size 155.90 KB
Description 440BX AGPset Spread Spectrum Frequency Synthesizer
Datasheet download datasheet W144 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PRELIMINARY W144 440BX AGPset Spread Spectrum Frequency Synthesizer Features • Maximized EMI suppression using Cypress’s Spread Spectrum technology • Single chip system frequency synthesizer for Intel® 440BX AGPset • Two copies of CPU output • Six copies of PCI output • One 48-MHz output for USB • One 24-MHz output for SIO • Two buffered reference outputs • One IOAPIC output • Thirteen SDRAM outputs provide support for 3 DIMMs • Supports frequencies up to 150 MHz • I2C™ interface for programming • Power management control inputs Table 1. Mode Input Table Mode 0 1 PCI_STOP# REF0 Pin2 Table 2. Pin Selectable Frequency FS3 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 Input Address CPU_F, CPU1 FS2 FS1 FS0 (MHz) PCI_F, 1:5 (MHz) 1 1 1 133.3 33.3 (CPU/4) 1 1 0 124 31 (CPU/4) 1 0 1 150 37.