ICS94229 Datasheet, PDF (6/17 Pages) Integrated Circuit Systems – Programmable System Clock Chip for AMD - K7 processor

ICS94229
Advance Information
Serial Configuration Command Bitmap
Byte0: Functionality and Frequency Select Register (default = 0)
Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 _{CPUCLK AGPCLK PCICLK Spre a d Pe rce nta ge}
SSB1 SSB0 FS3 FS2 FS1 FS0
0
0 0000
233.33
77.78 38.88 +/- 0.25% Center Spread
0
0 0001
220.00
73.33 36.67 +/- 0.25% Center Spread
0
0 0010
210.00
70.00 35.00 +/- 0.25% Center Spread
0
0 0011
200.00
66.67 33.33 +/- 0.25% Center Spread
0
0 0100
190.00
76.00 38.00 +/- 0.25% Center Spread
0
0 0101
180.00
72.00 36.00 +/- 0.25% Center Spread
0
0 0110
170.00
68.00 34.00 +/- 0.25% Center Spread
0
0 0111
150.00
75.00 37.50 +/- 0.25% Center Spread
0
0 1000
140.00
70.00 35.00 +/- 0.25% Center Spread
0
0 1001
120.00
60.00 30.00 +/- 0.25% Center Spread
0
0 1010
110.00
66.00 33.00 +/- 0.25% Center Spread
0
0 1011
66.67
66.67 33.33 +/- 0.25% Center Spread
0
0 1100
200.00
66.67 33.33 +/- 0.25% Center Spread
0
0 1101
166.67
66.67 33.33 +/- 0.25% Center Spread
0
0 1110
100.00
66.67 33.33 +/- 0.25% Center Spread
0
0 1111
133.33
66.67 33.33 +/- 0.25% Center Spread
1
0 0000
200.00
66.67 33.33 0 to -0.5% Down Spread
1
0 0001
166.67
66.67 33.33 0 to -0.5% Down Spread
1
0 0010
100.00
66.67 33.33 0 to -0.5% Down Spread
1
0 0011
133.33
66.67 33.33 0 to -0.5% Down Spread
1
0 0100
200.00
66.67 33.33 +/- 0.50% Center Spread
1
0 0101
166.67
66.67 33.33 +/- 0.50% Center Spread
1
0 0110
100.00
66.67 33.33 +/- 0.50% Center Spread
1
0 0111
133.33
66.67 33.33 +/- 0.50% Center Spread
1
1 1000
200.00
66.67 33.33 +/- 0.75% Center Spread
1
1 1001
166.67
66.67 33.33 +/- 0.75% Center Spread
1
1 1010
100.00
66.67 33.33 +/- 0.75% Center Spread
1
1 1011
133.33
66.67 33.33 +/- 0.75% Center Spread
1
1 1100
200.00
66.67 33.33 0 to +0.5% Up Spread
1
1 1101
166.67
66.67 33.33 0 to +0.5% Up Spread
1
1 1110
100.00
66.67 33.33 0 to +0.5% Up Spread
1
1 1111
133.33
66.67 33.33 0 to +0.5% Up Spread
Bit 6: 0 = Hardware select; 1 = I²C select. Default is OFF.
Bit 7: 0 = Spread off; 1 = Spread spectrum enable. Default is OFF
RATIO
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0
1
N/A
N/A
0
1
N/A
N/A
0
1
N/A
N/A
0
1
N/A
N/A
0
1
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