CY28325OXC-3T

更新时间： 2024-11-16 22:10:35

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
19页	266K
描述
FTG for VIA Pentium 4 Chipsets

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数据手册

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CY28325OXC-3T 数据手册

CY28325-3

FTG for VIA™ Pentium 4™ Chipsets

• Vendor ID and Revision ID support

• Programmable-drive strength support

• Programmable-output skew support

• Three copies AGP Clocks

• Power management control inputs

• Available in 48-pin SSOP

Features

• Spread Spectrum Frequency Timing Generator for VIA

PT/M 266-800 Pentium^4 Chipsets

• Programmableclockoutputfrequencywithlessthan1 MHz

increment

• Integrated fail-safe Watchdog Timer for system recovery

• Selectable hardware or software-programmed clock

frequency when Watchdog Timer time-out

CPU

x 3

AGP

x 3

PCI

x 9

REF

x 1

APIC

x 2

48M

x 1

24_48M

x 1

• Capable to generate system RESET after a Watchdog

Timer time-out occurs or a change in output frequency via

SMBus interface

• Support SMBus Byte Read/Write and Block Read/Write

operations to simplify system BIOS development

[1]

Block Diagram

Pin Configuration

VDD_REF

SSOP-48

XTAL

OSC

REF

PLL Ref Freq

VDD_CPU_CS (2.5V)

*FS4/REF

VDD_REF

GND_REF

VDD_APIC

GND_APIC

APIC0

Divider

CPUT_CS, CPUC_CS

PLL 1

Stop

Network

VDD_CPU (3.3V)

Clock

Control

CPUT_0,1, CPUC_0,1

APIC1

*(FS0:4)

VTT_PWRGD#

GND_CPU

*CPU_STOP#

VDD_48MHz

VDD_CPU_CS(2.5V)

CPUT_CS_F

CPUC_CS_F

CPUT_0

*MULTSEL1

*FS3/48MHz

VDD_APIC

APIC0:1

*FS2/24_48MHz

GND_48MHz

*FS0/PCI_F

*FS1/PCI1

*MULT_SEL1/PCI2

GND_PCI

PCI3

VDD_AGP

AGP0:2

CPUC_0

VDD_CPU(3.3V)

IREF

GND_CPU

CPUT_1

VDD_PCI

PCI_F

PCI4

CPUC_1

PD#

Stop

Clock

PCI1:8

VDD_PCI

PCI5

VTT_PWRGD#

CPU_STOP#*

PCI_STOP#*

RST#

Control

*PCI_STOP#

PCI6

PCI7

GND_PCI

PCI8

SDATA

SCLK

*PD#

AGP2

AGP0

AGP1

VDD_48MHz

48MHz

VDD_AGP

GND_AGP

PLL2

24_48MHz

RST#

SDATA

SCLK

SMBus

Logic

Note:

1. Pins marked with [*] have internal pull-up resistors. Pins marked with[^] have internal pull-down resistors.

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose, CA 95134

•

408-943-2600

Document #: 38-07590 Rev. *.*

Revised May 12, 2004

12 3 4 5 6 7...19

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