ICS952011 datasheet(1/25 Pages) ICST

部件名	ICS952011

功能描述	Programmable Timing Control Hub for P4 processor

PDF	25 Pages

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制造商	ICST [Integrated Circuit Systems]

网页	http://www.icst.com

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1 / 25 page

Integrated

Circuit

Systems, Inc.

ICS952011

0721A—07/29/03

Pin Configuration

Recommended Application:

SIS 645/645DX/648/650 style chipsets.

Output Features:

•

2 - Pairs of differential CPUCLKs (differential current mode)

•

1 - SDRAM @ 3.3V

•

9 - PCI @3.3V (including 2 free-running)

•

2 - AGP @ 3.3V

•

2 - ZCLKs @ 3.3V

•

1- 12/48MHZ @ 3.3V

•

1- 24/48MHz, @3.3V selectable by I

2C

•

3- REF @3.3V, 14.318MHz.

Key Specifications:

•

PCI - PCI output skew: < 500ps

•

CPU - SDRAM output skew: < 1ns

•

AGP - AGP output skew: <150ps

Programmable Timing Control Hub™ for P4™ processor

Functionality

Features/Benefits:

•

Selectable asynchronous/synchronous AGP, ZCLK and

PCI outputs

•

Supports DDR333 OEM frequencies

•

Programmable output frequency, divider ratios, output

rise/falltime, output skew.

•

Programmable spread percentage for EMI control.

•

Watchdog timer technology to reset system

if system malfunctions.

•

Programmable watch dog safe frequency.

•

Support I

2C Index read/write and block read/write

operations.

•

For PC133 SDRAM system use the ICS9179-16 as the

memory buffer.

•

For DDR SDRAM system use the ICS93735 or

ICS93732 as the memory buffer.

•

Uses external 14.318MHz crystal.

VDDREF 1

48 VDDSDR

**FS0/REF0 2

47 SDRAM_OUT

**FS1/REF1 3

46 GND

**FS2/REF2 4

45 CPU_STOP#(PD#)*

GNDREF 5

44 CPUCLKT1

X1 6

43 CPUCLKC1

X2 7

42 VDDCPU

GNDZ 8

41 GNDCPU

ZCLK0 9

40 CPUCLKT0

ZCLK1 10

39 CPUCLKC0

VDDZ 11

38 IREF

*(PCI_STOP#)PCICLK6 12

37 GND

VDDPCI 13

36 VDDA

**FS3/PCICLK_F0 14

35 SCLK

**FS4/PCICLK_F1 15

34 SDATA

*MODE0/PCICLK0 16

33 Vtt_PwrGd/PD#(CPUSTOP#)*

PCICLK1 17

32 GNDAGP

GNDPCI 18

31 AGPCLK0

VDDPCI 19

30 AGPCLK1

PCICLK2 20

29 VDDAGP

PCICLK3 21

28 VDD48

PCICLK4 22

27 12_48MHz/SEL12_48#**

PCICLK5 23

26 24_48MHz/SEL24_48#*~

GNDPCI 24

25 GND48

48-SSOP

* Internal Pull-Up Resistor

** Internal Pull-Down Resistor

~ This output has 1.5X drive strength

Bit2

Bit7

Bit6

Bit5

Bit4

CPU

SDR

AGP

PCI

ZCLK

FS4

FS3

FS2

FS1

FS0

MHz

0

100.20

66.80

33.40

66.80

0

1

100.20

133.60

66.80

33.40

66.80

0

1

0

100.20

200.40

66.80

33.40

66.80

0

1

100.20

167.00

66.80

33.40

66.80

0

1

0

133.60

100.20

66.80

33.40

66.80

0

1

0

1

133.60

66.80

33.40

66.80

0

1

0

133.60

200.40

66.80

33.40

66.80

0

1

133.60

167.00

66.80

33.40

66.80

0

1

0

200.05

100.03

66.68

33.34

66.68

0

1

0

1

200.05

133.37

66.68

33.34

66.68

0

1

0

1

0

200.05

66.68

33.34

66.68

0

1

0

1

200.05

160.04

66.68

33.34

66.68

0

1

0

166.70

100.20

66.68

33.40

66.68

0

1

0

1

166.70

133.36

66.80

33.40

66.80

0

1

0

160.04

200.05

66.68

33.34

66.68

0

1

166.70

66.68

33.34

66.68

1

0

100.20

66.80

33.40

133.60

1

0

1

100.20

133.60

66.80

33.40

133.60

1

0

1

0

100.20

200.40

66.80

33.40

133.60

1

0

1

100.20

167.00

66.80

33.40

133.60

1

0

1

0

133.60

100.20

66.80

33.40

133.60

1

0

1

0

1

133.60

66.80

33.40

133.60

1

0

1

0

133.60

200.40

66.80

33.40

133.60

1

0

1

133.60

167.00

66.80

33.40

133.60

1

0

200.05

100.03

66.68

33.34

133.37

1

0

1

200.05

133.37

66.68

33.34

133.37

1

0

1

0

200.05

66.68

33.34

133.37

1

0

1

200.05

160.04

66.68

33.34

133.37

1

0

166.70

100.20

66.68

33.40

133.60

1

0

1

166.70

133.36

66.80

33.40

133.60

1

0

160.04

200.05

66.68

33.34

133.37

1

166.70

66.68

33.34

133.37

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