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ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

Integrated Device Technology 

ICS9LPRS464

System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUss

General Description

The ICS9LPRS464 is a main clock synthesizer chip that provides all clocks required for ATI RD/RS600-based systems. An SMBus

interface allows full control of the device.

Funtional Block Diagram

X1

XTAL

X2

OSC.

FIXED PLL

FS(2:0)

PD

CLKREQA#

CLKREQB#

CONTROL

PLL

CLKREQC#

LOGIC

RESET_IN#

SMBDAT

SMBCLK

HTT

DIV

CPU

DIV

SRC

DIV

ATIG

DIV

REF(2:0)

48MHz(1:0)

HTTCLK0

CPUCLK(1:0)

SRCCLK(5:0)

ATIGCLK(1:0)

IDTTM/ICSTM System Clock Chip for ATI RS/RD600 series chipsets using AMD CPUs

4

1377A—04/07/08

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