ICS950403 Datasheet, PDF (3/18 Pages) Integrated Circuit Systems – AMD - K8™ System Clock Chip

ICS950403
Advance Information
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 I²C 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.
Power Groups
Pin Number
AVDD
GND
2
5
29
27, 30
29
33
43
42
VDD
9
16, 19
35, 38
46
GND
10
15, 20
34, 39
47
Description
Crystal
48MHz fixed,
Fix Analog, Fix Digital
CPU Master Clock, CPU Analog
PCICLK/HTTCLK Outputs
PCICLK Outputs
CPU outputs
REF
Mode Functionality Tables
ModeA
0
ModeB
Pin7
Pin8
Pin11
0
HTTCLK1 HTTCLK2 PCICLK9
0
1
HTTCLK1 HTTCLK2 HTTCLK3
1
0
PCICLK7 PCICLK8 PCICLK9
1
1
HTTCLK1 PCICLK8 PCICLK9
0732—01/27/03
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