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CY24239 - Spread Spectrum Frequency Timing Generator

Description

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

These outputs are affected by the CLK_STOP# input.

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

Features

  • Maximized EMI Suppression using Cypress’s Spread Spectrum Technology.
  • 1.2% and.
  • 2.4% Spread Spectrum support.
  • 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.
  • SMBus interface for programming.
  • Power management control inputs Table 2.

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Datasheet preview – CY24239

Datasheet Details

Part number CY24239
Manufacturer Cypress (now Infineon)
File Size 188.77 KB
Description Spread Spectrum Frequency Timing Generator
Datasheet download datasheet CY24239 Datasheet
Additional preview pages of the CY24239 datasheet.

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Full PDF Text Transcription

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www.DataSheet4U.com 39 CY24239 Spread Spectrum Frequency Timing Generator Features • Maximized EMI Suppression using Cypress’s Spread Spectrum Technology • –1.2% and –2.4% Spread Spectrum support • 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 • SMBus interface for programming • Power management control inputs Table 2. Pin Selectable Frequency Input Address CPU_F, CPU1:2 FS3 FS2 FS1 FS0 (MHz) 1 1 1 1 91.66 1 1 1 0 75.0 1 1 0 1 100.0 1 1 0 0 83.3 1 0 1 1 66.6 1 0 1 0 105.0 1 0 0 1 110.0 1 0 0 0 133.3 0 1 1 1 91.66 0 1 1 0 75.0 0 1 0 1 100.0 0 1 0 0 83.3 0 0 1 1 91.66 0 0 1 0 75.0 0 0 0 1 100.0 0 0 0 0 83.
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