Datasheet > CY28349B

CY28349B

更新时间： 2024-09-23 04:38:03

品牌	Logo	应用领域
SPECTRALINEAR		/
页数	文件大小	规格书
20页	222K
描述
FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets

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CY28349B 数据手册

CY28349B

FTG for Intel^®Pentium^®4 CPU and Chipsets

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

• System frequency synthesizer for Intel Brookdale 845

and Brookdale – G Pentium^®4 chipsets

• Vendor ID and Revision ID support

• Programmable drive strength support

• Programmable output skew support

• Power management control inputs

• Available in 48-pin SSOP

• Programmable clock output frequency with less than

1-MHz increment

• Integrated fail-safe Watchdog timer for system

recovery

• Automaticallyswitchtohardware-selectedorsoftware-

programmed clock frequency when w timer time-out

CPU

x 3

3V66

x 4

PCI

REF

x 2

48M

x 1

24_48M

x 1

x 10

• Fixed 3V66 and PCI output frequency mode.

• Capable of generating system RESET after a Watchdog

timer time-out occurs or a change in output frequency

via SMBus interface

Pin Configuration^[1]

Block Diagram

VDD_REF

XTAL

OSC

REF0:1

PLL Ref Freq

*MULTSEL1/REF1

REF0/MULTSEL0*

GND_REF

VDD_CPU

CPU_ITP

CPU_ITP#

GND_CPU

PWR_DWN#

CPU0

Divider

VDD_CPU

PLL 1

Network

VDD_REF

CPU0:1, CPU0:1#,

CPU_ITP, CPU_ITP#

*FS0:4

VTT_PWRGD#

GND_PCI

*FS2/PCI_F0

*FS3/PCI_F1

PCI_F2

VDD_PCI

*FS4/PCI0

PCI1

*MULTSEL0:1

CPU0#

VDD_3V66

3V66_0:2

VDD_CPU

CPU1

CPU1#

GND_CPU

IREF

VDD_CORE

GND_CORE

VDD_3V66

3V66_0

3V66_1

GND_3V66

3V66_2

PCI2

PWR_DWN#

GND_PCI

PCI3

PCI4

VDD_PCI

PCI_F0:2

PCI0:6

VDD_48MHz

PCI5

PCI6

VDD_PCI

VTT_PWRGD#

RST#

3V66_3/48MHz_1

VDD_48MHz

48MHz_0

PLL2

GND_48MHz

*FS0/48MHz_0

*FS1/24_48MHz

VDD_48MHz

3V66_3/48MHz_1

SCLK

SDATA

24_48MHz

RST#

SDATA

SCLK

SMBus

Logic

SSOP-48

Note:

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

Rev 1.0, November 20, 2006

Page 1 of 20

2200 Laurelwood Road, Santa Clara, CA 95054

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

www.SpectraLinear.com

12 3 4 5 6 7...20

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