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ICS932S825

1276D—10/25/07

General Description

The ICS932S825 is a main clock synthesizer chip that all clocks required by Serverworks HT2400-based servers.

An SMBus interface allows full control of the device.

Block Diagram

PCICLK(1:0)

CONTROL

LOGIC

XTAL

OSC.

CPUK8G(6:0)

FIXED PLL

48MHz(1:0)

REF (2:1), REF 0_RUN

X1

X2

PCI33

DIV

CPU

DIV

SDATA

SCLK

FS(2:0)

SPREAD_EN

SRC

DIV

PCIe(6:0)

CKPWRGD/PD#

25MHz(1:0)

25M

DIV

25MHz PLL

CPU/SRC/

PCI PLL

Series Resistor for Proper Termination

Zo = 50 ohms

1 Load

1

33

139

222

Series Resistor for Proper Termination

Zo = 50 ohms

CPUK8Gx

1

33

PCIe_Lx

1

33

Differential

Output

Number of

Loads on Board

Number of

Loads on Board

Single-ended Terminations (All Single-Ended Outputs)

Single-ended

Output Strength

Differential Terminations

2 Load

(Default)