3

ICS950403

Advance Information

0732—01/27/03

General Description

The ICS950403 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 ICS950403 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

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.

Power Groups

Mode Functionality Tables

ModeA

ModeB

Pin7

Pin8

Pin11

0

0

HTTCLK1

HTTCLK2

PCICLK9

0

1

HTTCLK1

HTTCLK2

HTTCLK3

1

0

PCICLK7

PCICLK8

PCICLK9

1

1

HTTCLK1

PCICLK8

PCICLK9

AVDD

GND

25

Crystal

29

27, 30

48MHz fixed,

29

33

Fix Analog, Fix Digital

43

42

CPU Master Clock, CPU Analog

VDD

GND

9

10

PCICLK/HTTCLK Outputs

16, 19

15, 20

PCICLK Outputs

35, 38

34, 39

CPU outputs

46

47

REF

Pin Number

Description