ICS9248YG-101-T datasheet(4/17 Pages) ICST

Part #	ICS9248YG-101-T

Description	Frequency Generator & Integrated Buffers for PENTIUM/ProTM & K6

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Manufacturer	ICST [Integrated Circuit Systems]

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4

ICS9248-101

Functionality

VDD=3.3V±5%,VDDL=2.5V±5%or3.3±5%,TA=0to70°C

Crystal (X1, X2) = 14.31818MHz

3

S

F2

S

F1

S

F0

S

F

U

P

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z

H

M

(

I

C

P

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(

0000

0

.

4

2

13

3

.

1

4

000

1

0

.

0

2

10

0

.

0

4

00

1

0

9

.

4

1

13

3

.

8

3

00

11

9

.

9

0

16

6

.

6

3

01

0

.

5

0

10

0

.

5

3

01

1

3

.

3

85

6

.

1

4

01

1

0

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7

3

15

2

.

4

3

0

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5

70

5

.

7

3

1

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0

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3

.

3

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5

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6

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1

3

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3

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7

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7

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3

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2

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6

97

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2

3

111

0

2

8

.

6

61

4

.

3

1111

5

.

1

95

.

0

3

Byte0: Functionality and Frequency Select Register (default = 0)

Serial Configuration Command Bitmap

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4

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6

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2

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4

1

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3

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8

3

1

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9

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0

16

6

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3

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5

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5

3

1

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3

.

3

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6

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1

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7

3

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5

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3

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3

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7

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7

2

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0

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0

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3

1

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1

12

2

.

6

97

0

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2

3

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1

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8

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6

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4

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3

1

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1

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0

3

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4

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6

,

2

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0

Notes:

1, Default at Power-up will be for latched

logic inputs to define frequency. Bit [2,

6:4] are default to 0010.

2, PWD = Power-Up Default

3, When disabling spread spectrum bit7

needs to be set to 0 to maintain nominal

frequency.

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