CY28323 Datasheet

IC型號(hào)：
CY28323
PDF描述：
Clocks and Buffers
文件大?。?/label>
175.28KB
PDF頁數(shù)：
22頁
芯片廠家：
ETC

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PRELIMINARY

CY28323

FTG for Intel

廬

Pentium

廬

4 CPU and Chipsets

Features

鈥?Compatible to Intel

廬

CK-Titan & CK-408 Clock Synthe-

sizer/Driver Specifications

鈥?System frequency synthesizer for Intel Brookdale 845

and Brookdale - G Pentium

廬

4 Chipsets

鈥?Programmable clock output frequency with less than

1 MHz increment

鈥?Integrated fail-safe Watchdog timer for system recov-

ery

鈥?Automatically switch to HW selected or SW pro-

grammed clock frequency when watchdog timer

time-out

鈥?Capable of generating system RESET after a Watchdog

timer time-out occurs or a change in output frequency

via SMBus interface

鈥?Support SMBus byte read/write and block read/ write

operations to simplify system BIOS development

鈥?Vendor ID and Revision ID support

鈥?Programmable drive strength support

鈥?Programmable output skew support

鈥?Power management control inputs

鈥?Available in 48-pin SSOP

CPU

3V66

PCI

x 10

REF

48M

24_48M

Block Diagram

Pin Configuration

VDD_REF

REF0:1

[[1]]

XTAL

OSC

PLL 1

PLL Ref Freq

Divider

Network

VDD_CPU

CPU0:1, CPU0:1#,

CPU_ITP, CPU_ITP#

*FS0:4

VTT_PWRGD#

*MULTSEL0:1

VDD_3V66

3V66_0:3

PWR_DWN#

VDD_PCI

PCI_F0:2

PCI0:6

PLL2

VDD_48MHz

48MHz

24_48MHz

SDATA

SCLK

SMBus

Logic

*MULTSEL1/REF1

VDD_REF

GND_PCI

*FS2/PCI_F0

*FS3/PCI_F1

PCI_F2

VDD_PCI

*FS4/PCI0

PCI1

PCI2

GND_PCI

PCI3

PCI4

PCI5

PCI6

VDD_PCI

VTT_PWRGD#

RST#

GND_48MHz

*FS0/48MHz

*FS1/24_48MHz

VDD_48MHz

REF0/MULTSEL0*

GND_REF

VDD_CPU

CPU_ITP

CPU_ITP#

GND_CPU

PWR_DWN#

CPU0

CPU0#

VDD_CPU

CPU1

CPU1#

GND_CPU

IREF

VDD_CORE

GND_CORE

VDD_3V66

3V66_0

3V66_1

GND_3V66

3V66_2

3V66_3

SCLK

SDATA

CY28323

RST#

SSOP-48

Intel and Pentium are registered trademarks of Intel Corporation

Note:

1. Signals marked with 鈥?鈥?and 鈥淾鈥?has internal pull-up and pull-down resistors respectively.

Cypress Semiconductor Corporation

Document #: 38-07004 Rev. *B

鈥?/div>

3901 North First Street

鈥?/div>

San Jose

鈥?/div>

CA 95134 鈥?408-943-2600

Revised December 14, 2002

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CY28323 Datasheet

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