Datasheet > IMISC670DYB

IMISC670DYB

更新时间： 2024-11-20 23:58:39

品牌	Logo	应用领域
其他 - ETC		时钟发生器
页数	文件大小	规格书
12页	95K
描述
CPU System Clock Generator

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中文翻译

获取价格

数据手册

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IMISC670DYB 数据手册

SC670

I²C Clock Generator for Pentium Notebook Designs.

Approved Product

FREQUENCY TABLE

PRODUCT FEATURES

SEL

CPU

60.0

66.6

PCI

30.0

33.3

• Supports Pentium & Pro CPUs.

• 4 CPU clocks up to 8 loads.

• Up to 8 SDRAM clocks for 2 DIMs.

• Supports Power Savings Frequencies.

• 7 PCI synchronous clocks.

CONNECTION DIAGRAM

• Optional common or mixed supply mode:

• (Vdd = Vddq3 = Vddq2 = 3.3V) or

• (Vdd = Vddq3 = 3.3V, Vddq2 = 2.5V)

• < 250ps skew CPU and SDRAM clocks.

• < 250ps skew among PCI clocks.

• I²C 2-Wire serial interface

• Programmable registers featuring:

- enable/disable each output pin

- mode as tri-state, test, or normal

- 24/48 MHz selections

• 1 IOAPIC clock for multiprocessor support.

• 48-pin SSOP package

IMISC670

REF1

REF0

Vss

Vdd

N/C

(See note 1)

Vddq2

Xin

IOAPIC0

PWR_DWN#

Vss

Xout

MODE

Vddq3

CPUCLK0

CPUCLK1

Vddq2

PCICLK_F

PCICLK0

Vss

CPUCLK2

CPUCLK3

Vss

PCICLK1

PCICLK2

PCICLK3

PCICLK4

Vddq3

SDRAM0

SDRAM1

Vddq3

BLOCK DIAGRAM

REF0:1

PCICLK5

Vss

SDRAM2

SDRAM3

Vss

Xin

Xout

REF

Vddq2

OSC

PLL1

PLL2

IOAPIC0

SEL

SDATA

SDCLK

Vddq3

SDRAM4

SDRAM5

Vddq3

Vddq2

Vddq3

SDATA

SDCLK

CPUCLK0~3

SDRAM0~7

PCICLK0~5

48/24MHZ

Vss

SDRAM6/CPU_STOP#

SDRAM7/PCI_STOP#

Vdd

SEL

dly

PCI_STOP#

CPU_STOP#

PWR_DWN#

PCICLK_F

MODE

not

Note 1: N/C is a no connect pin. IMI product does

48/24MHZ

require CPU 3.3_2.5# select line to operate properly at

2.5 volts. This pin may be connected externally to Vdd

or Vss.

48/24MHZ

INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.

MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571

Rev.1.4

6/20/97

Page 1 of 12

12 3 4 5 6 7...12

中文翻译

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