3

Integrated

Circuit

Systems, Inc.

ICS952621

0756A—09/10/04

ICS962621 is a programmable 48 pin clock chip following Intel CK409 Yellow Cover specification. This clock synthesizer provides a single

chip solution for next generation P4 Intel processors and Intel chipsets. ICS962621 is driven with a 14.318MHz crystal. It generates CPU

outputs up to 200MHz. It also provides a tight ppm accuracy output for Serial ATA support.

General Description

Block Diagram

Power Groups

VDD

GND

3

6

Xtal, Ref

27

28

3V66 [0:3]

10,16

11,17

PCICLK outputs

34

37

SRCCLK outputs

48

47

Master clock, CPU Analog

24

23

48MHz, Fix Digital, Fix Analog

--

47

IREF

40

43

CPUCLK clocks

Description

Pin Number

I REF

PLL2

Frequency

Dividers

Programmable

Spread

PLL1

Programmable

Frequency

Dividers

STOP

Logic

48MHz, USB, DOT, VCH

X1

X2

XTAL

SDATA

SCLK

VTTPWRGD#

PD#

FS_A

FS_B

MODE

Control

Logic

REF (1:0)

CPUCLKT (1:0)

CPUCLKC (1:0)

SRCCLKT0

SRCCLKC0

3V66(3:0)

PCICLK (5:0), PCICLK_F (2:0)

CPUCLKT_ITP

RESET#

CPUCLKC_ITP