Integrated

Circuit

Systems, Inc.

ICS9248-110

Third party brands and names are the property of their respective owners.

Block Diagram

9248-110 Rev C 01/08/01

Functionality

Pin Configuration

48-Pin 300mil SSOP

Recommended Application:

AMD-K7 based systems

Output Features:

•

3 differential pair open drain CPU clocks (2.7V external

pull-up; up to 150MHz achieviable through I

•

2 - AGPCLK @ 3.3V

•

8 - PCI @3.3V, including 1 free running

•

1 - 48MHz @ 3.3V

•

1 - 24/48MHz @ 3.3V

•

2- REF @3.3V, 14.318MHz.

Features:

•

Up to 150MHz frequency support

•

Support power management: CPU, PCI, stop and Power

down Mode from I

•

Spread spectrum for EMI control -0.5% down spread

•

Uses external 14.318MHz crystal

•

FS pins for frequency select

Key Specifications:

•

CPU – CPU: <250ps

•

AGP-AGP: <250ps

•

PCI – PCI: <400ps

•

CPU - SDRAM_OUT: <400ps

•

CPU-AGP <250ps

* Internal 120K pullup resistor on indicated inputs

** Internal 240K pullup resistor on indicated inputs

**FS0/REF0

**FS1/REF1

GNDREF

X1

X2

GNDPCI

PCICLK_F

PCICLK0

VDDPCI

PCICLK1

PCICLK2

GNDPCI

PCICLK3

PCICLK4

VDDPCI

PCICLK5

PCICLK6

VDDAGP

AGP0

AGP1

GNDAGP

VDD48

48MHz

SEL24_48#/24-48MHz

VDDREF

GNDSD

SDRAM_OUT

VDDSD

RESERVED

CPUCLKC2

CPUCLKT2

GNDCPU

CUCLKC1

CPUCLKT1

GND

CPUCLKC0

CPUCLKT0

RESERVED

VDD

GND

PCI_STOP#

CPU_STOP

PD#

SPREAD#

FS2*

SDATA

SCLK

GND48

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

FS (2:0)

SPREAD#

CPU_STOP#

X1

X2

OSC

PLL

CPU

STOP

PLL2

REF (1:0)

CPUCLKC (2:0)

CPUCLKT (2:0)

SDRAM_OUT

48MHz

PCICLK (6:0)

24_48MHz

PCICLK_F

PCI_STOP#

SEL24_48#

PD#

/ 2

/ 3

PCI

STOP

X 2

/ 2

AGP (1:0)

0

0

0

90

30.00

60.00

0

0

1

95

31.67

63.33

0

1

0

100.99

33.66

67.33

0

1

1

115

38.33

76.67

1

0

0

100.7

33.57

67.13

1

0

1

103

34.33

68.67

1

1

0

105

35.00

70.00

1

1

1

110

36.67

73.33

PCI

AGP

FS2

FS1

FS0

CPU,

SDRAM

ICS reserves the right to make changes in the device data identified in

this publication without further notice. ICS advises its customers to

obtain the latest version of all device data to verify that any

information being relied upon by the customer is current and accurate.