Integrated

Circuit

Systems, Inc.

ICS950410

Advance Information

0888—04/06/04

Functionality

Recommended Application:

AMD K8 System Clock with AMD, VIA or ALI Chipset

Output Features:

•

3 - Differential pair push-pull CPU clocks @

3.3V

•

9 - PCICLK (Including 1 free running) @ 3.3V

•

3 - Selectable PCICLK/HTTCLK @ 3.3V

•

1 - HTTCLK @ 3.3V

•

1 - 48MHz @ 3.3V fixed.

•

1 - 24/48MHz @ 3.3V

•

2 - REF @ 3.3V, 14.318MHz.

Features:

•

Programmable output frequency.

•

Programmable output divider ratios.

•

Programmable output rise/fall time.

•

Programmable output skew.

•

Programmable spread percentage for EMI

control.

•

Watchdog timer technology and RESET# output

to reset system

if system malfunctions.

•

Programmable watch dog safe frequency.

•

Support I

write operations.

•

Uses external 14.318MHz crystal.

•

Supports Hyper Transport Technology (HTTCLK).

AMD - K8™ System Clock Chip

ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.

ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.

CPU

HTT

PCI

MHz

MHz

MHz

0

0

0

0

100.90

67.27

33.63

0

0

0

1

133.90

66.95

33.48

0

0

1

0

168.00

67.20

33.60

0

0

1

1

202.00

67.33

33.67

0

1

0

0

100.20

66.80

33.40

0

1

0

1

133.50

66.75

33.38

0

1

1

0

166.70

66.68

33.34

0

1

1

1

200.40

66.80

33.40

1

0

0

0

150.00

60.00

30.00

1

0

0

1

180.00

60.00

30.00

1

0

1

0

210.00

70.00

35.00

1

0

1

1

240.00

60.00

30.00

1

1

0

0

270.00

67.50

33.75

1

1

0

1

233.33

66.67

33.33

1

1

1

0

266.67

66.67

33.33

1

1

1

1

300.00

75.00

37.50

FS0

FS3

FS2

FS1

Pin Configuration

~*FS0/REF0 1

48 REF1/FS1*

VDDHTT 2

47 GND

X1 3

46 VDDREF

X2 4

45 Reset#

GND 5

44 VDDA

*ModeA/HTTCLK0 6

43 GND

*ModeB/PCICLK8/HTTCLK1 7

42 CPUCLK8T0

PCICLK9/HTTCLK2 8

41 CPUCLK8C0

VDDPCI 9

40 VDDCPU

GND 10

39 CPUCLK8T1

PCICLK11/HTTCLK3 11

38 CPUCLK8C1

*FS2/PCICLK10 12

37 GND

PCICLK0 13

36 VDDCPU

PCICLK1 14

35 CPUCLK8T2

GND 15

34 CPUCLK8C2

VDDPCI 16

33 GND

PCICLK2 17

32 Turbo#

PCICLK318

31PD#*

VDDPCI 19

30 48MHz/FS3**

GND 20

29 GND

28 AVDD48

27 24_48MHz/Sel24_48#*

26 SDATA

25 SCLK

48-SSOP

* Internal Pull-Up Resistor

~ This Output has 1.5x drive