ICS950405

0802F—04/22/05

Functionality

Recommended Application:

AMD K8 System Clock with AMD, VIA or ALI Chipset

Output Features:

•

2 - 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

•

3 - REF @ 3.3V, 14.318MHz.

AMD - K8™ System Clock Chip

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 REF2/FS2*

GND 5

44 Reset#

*ModeA/HTTCLK0 6

43 VDDA

*ModeB/PCICLK8/HTTCLK1 7

42 GND

PCICLK9/HTTCLK2 8

41 CPUCLK8T0

VDDPCI 9

40 CPUCLK8C0

GND 10

39 GND

PCICLK11/HTTCLK3 11

38 VDDCPU

PCICLK10 12

37 CPUCLK8T1

PCICLK013

36CPUCLK8C1

PCICLK114

35VDDCPU

GND 15

34 GND

VDDPCI 16

33 GND

PCICLK217

32PD#*

PCICLK3 18

31 48MHz/FS3**

VDDPCI 19

30 GND

GND 20

29 AVDD48

2XPCICLK4 21

28 24_48MHz/Sel24_48#*

2XPCICLK5 22

27 GND

2XPCICLK6 23

26 SDATA

2XPCICLK7 24

25 SCLK

48-SSOP

* Internal Pull-Up Resistor

2X This Output has 2X Default Drive and can be programmaed lower via IIC

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

2C Index read/write and block read/write

operations.

•

Uses external 14.318MHz crystal.

•

Supports Hyper Transport Technology (HTTCLK).