4

Integrated

Circuit

Systems, Inc.

ICS932S422C

1412A—12/10/07

The ICS932S422C is a main clock synthesizer for CK410-generation Intel server platforms. The ICS932S422C is driven with

a 14.318MHz crystal. It generates 5 CPU output pairs up to 400MHz and PCI-Express clocks at 100 or 200 MHz. The 48 MHz

USB clock is an exact 48.000 MHz clock.

General Description

Block Diagram

Power Groups

VDD

GND

53

50

Xtal, Ref

1,8

2,7

PCICLK outputs

15,25,28

20

SRCCLK outputs

35

34

Master clock, CPU Analog

12

14

48MHz, PLL_48

47,44,38

41

CPUCLK clocks

Description

Pin Number

CPU PLL

CONTROL

LOGIC

XTAL

OSC.

CPUCLK(4:0)

FIXED PLL

48MHz

DIVIDER

DIVIDERS

REF(1:0)

SRCCLK(3:0)

SDATA

SCLK

X1

X2

IREF

FS(C:A)

VTT_PWRGD#/PD

TEST_MODE

SRC/PCI

PLL

DIVIDERS

TEST_SEL

PCICLK(3:0), PCICLK_F(2:0)