ICS950402 Datasheet, PDF (3/19 Pages) Integrated Circuit Systems – AMD - K8 System Clock Chip

ICS950402
General Description
The ICS950402 is a main system clock solution for desktop designs using the AMD K8 CPU. It provides all necessary
clock signals for Clawhammer and Sledgehammer systems.
The ICS950402 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
32
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
PCI33_HT66outputs
PCI33 outputs
CPU outputs
REF
Mode Functionality Tables
ModeA
ModeB
Pin6
Pin7
0
0
HTTCLK0 HTTCLK1
0
1
ModeA _HTTCLK1
(Input Only)
1
0
PCICLK7 PCICLK8
ModeA
1
1
(Input Only) ^PCICLK8
Pin8
HTTCLK2
HTTCLK2
PCICLK9
PCICLK9
Pin11
PCICLK10
HTTCLK3
PCICLK10
PCICLK10
ModeC
0
1
Pin24
PCICLK6
PCI_STOP#
0700B—04/30/04
3