5

ICS94241

0453C—10/26/04

Byte 0: Functionality and frequency select register (Default=0)

Notes:

1.

Default at power-up will be for latched logic inputs to define frequency, as displayed by Bit 3.

Bit

PWD

Bit2 Bit7 Bit6 Bit5 Bit4

FS4 FS3 FS2 FS1 FS0

0

0

0

0

0

66.67

33.33

Center Spread +/- 0.25%

0

0

0

0

1

66.67

33.33

Down Spread 0 to - 0.5%

0

0

0

1

0

68.67

34.33

Center Spread +/- 0.25%

0

0

0

1

1

71.34

35.66

Center Spread +/- 0.25%

0

0

1

0

0

73.34

36.66

Center Spread +/- 0.25%

0

0

1

0

1

76.67

38.33

Center Spread +/- 0.25%

0

0

1

1

0

150.00

30.00

Center Spread +/- 0.25%

0

0

1

1

1

166.67

33.33

Center Spread +/- 0.25%

0

1

0

0

0

100.00

33.33

Center Spread +/- 0.25%

0

1

0

0

1

100.00

33.33

Down Spread 0 to - 0.5%

0

1

0

1

0

103.00

34.33

Center Spread +/- 0.25%

0

1

0

1

1

107.00

35.67

Center Spread +/- 0.25%

0

1

1

0

0

110.00

36.67

Center Spread +/- 0.25%

0

1

1

0

1

115.00

38.33

Center Spread +/- 0.25%

0

1

1

1

0

100.90

33.63

Center Spread +/- 0.25%

0

1

1

1

1

90.00

30.00

Center Spread +/- 0.25%

1

0

0

0

0

200.00

33.33

Center Spread +/- 0.25%

1

0

0

0

1

200.00

33.33

Down Spread 0 to - 0.5%

1

0

0

1

0

206.00

34.33

Center Spread +/- 0.25%

1

0

0

1

1

214.00

35.67

Center Spread +/- 0.25%

1

0

1

0

0

220.00

36.67

Center Spread +/- 0.25%

1

0

1

0

1

230.00

38.33

Center Spread +/- 0.25%

1

0

1

1

0

201.80

33.63

Center Spread +/- 0.25%

1

0

1

1

1

180.00

30.00

Center Spread +/- 0.25%

1

1

0

0

0

133.33

33.33

Center Spread +/- 0.25%

1

1

0

0

1

133.33

33.33

Down Spread 0 to - 0.5%

1

1

0

1

0

137.33

34.33

Center Spread +/- 0.25%

1

1

0

1

1

142.67

35.67

Center Spread +/- 0.25%

1

1

1

0

0

146.67

36.67

Center Spread +/- 0.25%

1

1

1

0

1

153.33

38.33

Center Spread +/- 0.25%

1

1

1

1

0

133.90

33.48

Center Spread +/- 0.25%

1

1

1

1

1

120.00

30.00

Center Spread +/- 0.25%

Bit 3

0

Bit 1

1

Bit 0

0

Note 1

0=Frequency selected by hardware; 1=Frequency selected by Bit2, (7:4)

0=Spread off; 1=Spread Spectrum Enable

0=Running; 1=Tristate

Description

Bit

2, (7:4)

CPUCLK PCICLK

Spread Percentage