C9812 - Low EMI Clock Generator

Description

PIN No.

1 Pin Name SEL2/REF PWR VDD I/O I/O TYPE Description 3.3V 14.318 MHz clock output.

This pin also serves as the select strap (associates with SEL0 & 1, see app.

Features

Intel’s 810E clock solution 3 copies of CPU Clock (CPU[0:1] and CPU_ITP) 9 copies of SDRAM Clock (SDRAM[0:7] and DCLK) 8 copies of PCI Clock 2 copies of 3V66 Clock 2 copies of APIC Clock, synchronous to PCI Clock 1 REF Clock 1 USB Clock (Non SSC) 1 DOT Clock (Non SSC) Power Down Feature Spread Spectrum Support SMBUS Support for turning off unused clocks Frequency Table (MHz) S.

Cypress Semiconductor

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Datasheet Details

Part number	C9812
Manufacturer	Cypress Semiconductor
File Size	295.62 KB
Description	Low EMI Clock Generator
Datasheet	C9812 Datasheet
Additional preview pages of the C9812 datasheet.

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Full PDF Text Transcription

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www.DataSheet4U.com APPROVED PRODUCT C9812 Low EMI Clock Generator for Intel 810E Chipset Systems Product Features • • • • • • • • • • • • Intel’s 810E clock solution 3 copies of CPU Clock (CPU[0:1] and CPU_ITP) 9 copies of SDRAM Clock (SDRAM[0:7] and DCLK) 8 copies of PCI Clock 2 copies of 3V66 Clock 2 copies of APIC Clock, synchronous to PCI Clock 1 REF Clock 1 USB Clock (Non SSC) 1 DOT Clock (Non SSC) Power Down Feature Spread Spectrum Support SMBUS Support for turning off unused clocks Frequency Table (MHz) SEL2 X X 0 0 1 SEL1 0 0 1 1 1 SEL0 0 1 0 1 X CPU Tristate 66.6 100 133.3 Table 1 SDRAM Tristate 100 100 100 PCI Tristate 33.3 33.3 33.3 Test mode (see table2) Note: The following clocks remain fixed frequencies except in Test Mode. 3V66=66.6MHz, USB/DOT=48MHz, REF=14.

Published: Jan 21, 2007 |