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ICS950405

0802F—04/22/05

General Description

The ICS950405 is a main system clock solution for desktop designs using the AMD K8 CPU. It provides all necessary

clock signals for Clawhammer and Sledgehammer with AMD, VIA or ALI systems.

The ICS950405 is part of a whole new line of ICS clock generators and buffers called TCH™ (Timing Control Hub). This

part incorporates ICS's newest clock technology which offers more robust features and functionality. Employing the

use of a serially programmable I

2C interface, this device can adjust the output clocks by configuring the frequency

setting, the output divider ratios, selecting the ideal spread percentage, the output skew, the output strength, and

enabling/disabling each individual output clock. M/N control can configure output frequency with resolution up to

0.1MHz increment.

Block Diagram

PLL2

PLL1

Spread

Spectrum

PCICLK (7:0, 10)

CPUCLKT (1:0)

CPUCLKC (1:0)

X1

X2

XTAL

OSC

CPU

DIVDER

PCI

DIVDER

HTT

DIVDER

SDATA

SCLK

PD#

FS (3:0)

SEL24_48#

MODE (A,B)

Control

Logic

REF (2:0)

48MHz

24_48MHz

/ 2

PCICLK(11,9,8)/HTTCLK (3:1)

HTTCLK0

Config.

Reg.