PRELIMINARY W48S111-14 Spread Spectrum Desktop/Notebook System Frequency Generator Features Key Specifications • Maximized EMI suppression using Cypress’s Spread Spectrum Technology • Reduces measured EMI by as much as 10 dB • I2C programmable to 133 MHz • Two skew-controlled copies of CPU output • SEL100/66# selects CPU frequency (100 or 66.
8 MHz) • Seven copies of PCI output (synchronous w/CPU output) • One copy of 14.
31818-MHz IOAPIC output • One copy of 48-MHz USB output • Selectable 24-/48-MHz clock is determined by resistor straps on power-up • One high-drive output buffer that produces a copy of the 14.
318-MHz reference • Isolated core VDD pin for noise reduction Supply Voltages...

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