CY28323B

更新时间： 2024-09-22 22:10:35

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
22页	299K
描述
FTG for Intel Pentium 4 CPU and Chipsets

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CY28323B 数据手册

CY28323B

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

• Support SMBus byte read/write and block read/ write

Features

operations to simplify system BIOS development

• Compatible to Intel^®CK-Titan & CK-408 Clock Synthe-

sizer/Driver Specifications

• 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

1 MHz increment

• Integrated fail-safe Watchdog timer for system recov-

ery

CPU

x 3

3V66

x 4

PCI

x 10

REF

x 2

48M

x 1

24_48M

x 1

• Automatically switch to HW selected or SW pro-

grammed clock frequency when Watchdog timer times

out

• 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

REF0:1

XTAL

OSC

PLL Ref Freq

*MULTSEL1/REF1

CPU0:1, CPU0:1#,

REF0/MULTSEL0*

GND_REF

VDD_CPU

CPU_ITP

CPU_ITP#

GND_CPU

PWR_DWN#

CPU0

Divider

VDD_CPU

PLL 1

Network

VDD_REF

CPU_ITP, CPU_ITP#

*FS0:4

VTT_PWRGD#

GND_PCI

*FS2/PCI_F0

*FS3/PCI_F1

PCI_F2

*MULTSEL0:1

VDD_PCI

*FS4/PCI0

PCI1

CPU0#

VDD_3V66

3V66_0:3

VDD_CPU

CPU1

PCI2

CPU1#

PWR_DWN#

GND_PCI

PCI3

GND_CPU

IREF

VDD_PCI

PCI_F0:2

PCI4

VDD_CORE

GND_CORE

VDD_3V66

3V66_0

PCI0:6

PCI5

PCI6

VDD_PCI

VTT_PWRGD#

RST#

3V66_1

VDD_48MHz

48MHz

GND_3V66

3V66_2

PLL2

GND_48MHz

*FS0/48MHz

*FS1/24_48MHz

VDD_48MHz

3V66_3

24_48MHz

RST#

SCLK

SDATA

SCLK

SMBus

Logic

SSOP-48

Note:

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

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

Document #: 38-07453 Rev. *B

Revised November 19, 2003

12 3 4 5 6 7...22

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