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W130 - Spread Spectrum Desktop/Notebook System Clock

General Description

CPU Clock Outputs 0 through 5: These six CPU clock outputs are controlled by the CPU_STOP# control pin.

Output voltage swing is controlled by voltage applied to VDDQ2.

PCI Bus Clock Outputs 1 through 7: These seven PCI clock outputs are controlled by the PCI_STOP# control pin.

Key Features

  • Maximized EMI suppression using Cypress’s Spread Spectrum technology.
  • Six copies of CPU Clock.
  • Eight copies of PCI Clock (synchronous w/CPU clock).
  • Two copies of 14.318-MHz IOAPIC Clock.
  • Two copies of 48-MHz USB Clock.
  • Three buffered copies of 14.318-MHz reference input.
  • Input is a 14.318-MHz XTAL or reference signal.
  • Selectable 100-MHz or 66-MHz CPU Clocks.
  • Power management control input pins.
  • Test mode a.

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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 W130 Spread Spectrum Desktop/Notebook System Clock Features • Maximized EMI suppression using Cypress’s Spread Spectrum technology • Six copies of CPU Clock • Eight copies of PCI Clock (synchronous w/CPU clock) • Two copies of 14.318-MHz IOAPIC Clock • Two copies of 48-MHz USB Clock • Three buffered copies of 14.318-MHz reference input • Input is a 14.318-MHz XTAL or reference signal • Selectable 100-MHz or 66-MHz CPU Clocks • Power management control input pins • Test mode and output three-state capability CPU0:5 Clock Skew: ...................................................175 ps PCI_F, PCI1:7 Clock Skew: ......................................... 500 ps CPU to PCI Clock Skew: .............. 1.5 to 4.