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ICS94235

Programmable System Clock Chip for AMD-K7™ processor

Integrated Circuit Systems

ICS94235 Datasheet PDF : 19 Pages

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ICS94235

Serial Configuration Command Bitmap

Bit

Description

Bit 2,

Bit 7:4

Bit 3

Bit 1

Bit 0

FS3 FS2 FS1 FS0 CPUCLK SDRAM PCICLK

Bit2 Bit7 Bit6 Bit5 Bit4 (MHz) (MHz) (MHz)

0 0000

66.66

66.66 33.33

0 0 0 0 1 66.66 100.00 33.33

0 0 0 1 0 100.00 66.66 33.33

0 0 0 1 1 100.00 100.00 33.33

0 0 1 0 0 100.00 133.33 33.33

0 0 1 0 1 120.00 120.00 30.00

0 0 1 1 0 133.33 100.00 33.33

0 0 1 1 1 133.33 133.33 33.33

0 1000

90.00

90.00 30.00

0 1 0 0 1 100.90 100.90 33.63

0 1 0 1 0 100.00 66.66 33.33

0 1 0 1 1 100.00 100.00 33.33

0 1 1 0 0 100.00 133.33 33.33

0 0 1 0 1 126.00 126.00 31.50

0 1 1 1 0 133.33 100.00 33.33

0 1 1 1 1 133.33 133.33 33.33

1 0 0 0 0 102.00 102.00 34.00

1 0 0 0 1 102.00 136.00 34.00

1 0 0 1 0 136.00 102.00 34.00

1 0 0 1 1 136.00 136.00 34.00

1 0 1 0 0 103.00 103.00 34.33

1 0 1 0 1 103.00 137.33 34.33

1 0 1 1 0 137.33 103.00 34.33

1 0 1 1 1 137.33 137.33 34.33

1 1 0 0 0 105.00 105.00 35.00

1 1 0 0 1 105.00 140.00 35.00

1 1 0 1 0 140.00 140.00 35.00

1 1 0 1 1 107.00 107.00 35.66

1 1 1 0 0 107.00 142.66 35.66

1 1 1 0 1 133.90 133.90 33.40

1 1 1 1 0 110.00 110.00 36.66

1 1 1 1 1 146.66 146.66 36.66

0 - Frequency is selected by hardware select, Latched Inputs

1 - Frequency is selected by Bit 2, 7:4

0 - Normal

1 - Spread Spectrum Enabled

0 - Running

1- Tristate all outputs

AGP

(MHz)

66.66

60.00

66.66

60.00

67.27

66.66

63.00

66.66

67.99

68.66

69.99

71.33

66.95

73.33

Spread Precentage

+/- 0.25% Center Spread

0 to -0.5% Down Spread

+/- 0.25% Center Spread

0 to -0.5% Down Spread

+/- 0.25% Center Spread

PWD

00000

Note1

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