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W216 - Spread Spectrum FTG for 440BX and VIA Apollo Pro-133

Datasheet Summary

Description

CPU Outputs 1 and 2: Frequency is set by the FS0:3 inputs or through serial input O interface, see Tables 2 and 6.

These outputs are affected by the CLK_STOP# input.

Free-Running CPU Output: Frequency is set by the FS0:3 inputs or through serial input O interface, see Tables 2 and 6.

Features

  • Maximized EMI Suppression using Cypress’s Spread Spectrum Technology.
  • Single chip system FTG for Intel® 440BX AGPset and VIA Apollo Pro-133.
  • Three copies of CPU output.
  • Seven copies of PCI output.
  • One 48-MHz output for USB / One 24-MHz for SIO.
  • Two buffered reference outputs.
  • Two IOAPIC outputs.
  • Seventeen SDRAM outputs provide support for 4 DIMMs.
  • Supports frequencies up to 150 MHz.
  • I2C™ interface for prog.

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Datasheet Details

Part number W216
Manufacturer Cypress Semiconductor
File Size 154.75 KB
Description Spread Spectrum FTG for 440BX and VIA Apollo Pro-133
Datasheet download datasheet W216 Datasheet
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PRELIMINARY W216 Spread Spectrum FTG for 440BX and VIA Apollo Pro-133 Features • Maximized EMI Suppression using Cypress’s Spread Spectrum Technology • Single chip system FTG for Intel® 440BX AGPset and VIA Apollo Pro-133 • Three copies of CPU output • Seven copies of PCI output • One 48-MHz output for USB / One 24-MHz for SIO • Two buffered reference outputs • Two IOAPIC outputs • Seventeen SDRAM outputs provide support for 4 DIMMs • Supports frequencies up to 150 MHz • I2C™ interface for programming • Power management control inputs Table 1. Mode Input Table Mode 0 1 Pin 3 PCI_STOP# REF0 Key Specifications CPU Cycle-to-Cycle Jitter: .......................................... 250 ps CPU to CPU Output Skew: ......................................... 175 ps PCI to PCI Output Skew: .......
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