Datasheet > CY28344

CY28344

更新时间： 2024-11-18 04:38:03

品牌	Logo	应用领域
SPECTRALINEAR		/
页数	文件大小	规格书
21页	217K
描述
FTG for Intel Pentium 4 CPU and Chipsets

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数据手册

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CY28344 数据手册

CY28344

FTG for Intel Pentium 4 CPU and Chipsets

• Capable of generating system RESET after a Watchdog

timer time-out occurs or a change in output frequency

via SMBus interface

Features

• Compatible to Intel® CK-Titan and CK-408 Clock

Synthesizer/Driver Specifications

• Support SMBus byte Read/Write and block Read/Write

operations to simplify system BIOS development

• Vendor ID and Revision ID support

• Programmable drive strength support

• Programmable output skew support

• Power management control inputs

• Available in 48-pin SSOP

• System frequency synthesizer for Intel Brookdale (845)

and Brookdale G Pentium® 4 Chipsets

• Programmable clock output frequency with less than

1MHz increment

• Integrated fail-safe Watchdog timer for system

recovery

• Automatically switch to HW-selected or

SW-programmed clock frequency when Watchdog

timer time-out

CPU

×3

3V66

×4

PCI

×9

REF

×1

48M

×2

Pin Configuration^[1]

Block Diagram

VDD_REF

XTAL

REF_2X

VDD_REF

REF_2X/FS2^

CPU0

CPU0#

VDD_CPU

CPU1

CPU1#

GND_CPU

VDD_CPU

CPU2

CPU2#

MULTSEL0

IREF

GND_CPU

48MHz/FS3^

24_48MHz

VDD_48MHz

GND_48MHz

3V66_0/VCH_CLK/FS4^

VDD_3V66

GND_3V66

SCLK

SDATA

VTTPWRGD/PD#*

GND_CORE

OSC

PLL Ref Freq

Divider

GND_REF

^FS0/PCI_F0

^FS1/PCI_F1

VDD_PCI

GND_PCI

PCI0

VDD_CPU

PLL 1

Network

CPU0:2, CPU0:2#,

FS0:4

MULTSEL0

PCI1

PCI2

PCI3

VDD_3V66

3V66_1:3

VDD_PCI

GND_PCI

PCI4

VDD_3V66

3V66_0/VCH_CLK

VTTPWRGD/PD#

PCI5

PCI6

VDD_PCI

PCI_F0:1

VDD_3V66

GND_3V66

3V66_1

3V66_2

3V66_3

RST#

PCI0:6

VDD_48MHz

48MHz

PLL2

VDD_CORE

24_48MHz

RST#

SSOP-48

SDATA

SCLK

SMBus

Logic

Note:

1. Signals marked with “*” and “^,” respectively, have internal pull-up and

pull-down resistors.

Rev 1.0, November 21, 2006

2200 Laurelwood Road, Santa Clara, CA 95054

Page 1 of 21

Tel:(408) 855-0555 Fax:(408) 855-0550

www.SpectraLinear.com

12 3 4 5 6 7...21

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