ICS94215 Datasheet, PDF (6/18 Pages) Integrated Circuit Systems – Programmable System Clock Chip for AMD - K7™ Processor

ICS94215
Serial Configuration Command Bitmap
Byte0: Functionality and Frequency Select Register (default = 0)
Bit
Description
PWD
Bit
(2,7:4)
Bit 3
Bit 1
Bit 0
Bit2
Bit7
FS3
Bit6
FS2
Bit5
FS1
Bit4
FS0
VCO/REF
Divider
VCO
Mz
CPUCLK PCICLK
MHz
MHz
0 0 0 0 0 440/35 180.00 90.00 30.00
0 0 0 0 1 491/37 190.01 95.00 31.67
0 0 0 1 0 395/28 201.99 101.00 33.67
0 0 0 1 1 513/36 204.03 102.00 34.00
0 0 1 0 0 451/32 201.80 100.90 33.57
0 0 1 0 1 446/31 206.00 103.00 34.33
0 0 1 1 0 484/33 210.00 105.00 35.00
0 0 1 1 1 447/32 200.01 100.00 33.33
0 1 0 0 0 284/19 214.02 107.00 35.67
0 1 0 0 1 472/31 218.01 109.00 36.33
0 1 0 1 0 507/33 219.98 110.00 36.67
0 1 0 1 1 496/32 221.93 111.00 37.00
0 1 1 0 0 363/23 225.98 113.00 37.67
0 1 1 0 1 514/32 229.99 115.00 38.33
0 1 1 1 0 474/29 234.03 117.00 39.00
0 1 1 1 1 391/21 266.59 133.30 33.33
1 0 0 0 0 352/21 240.00 120.00 40.00
1 0 0 0 1 454/26 250.02 125.00 31.25
1 0 0 1 0 345/19 259.99 130.00 32.50
1 0 0 1 1 467/25 267.46 133.73 33.43
1 0 1 0 0 396/21 270.00 135.00 33.75
1 0 1 0 1 421/22 274.00 137.00 34.25
1 0 1 1 0 466/24 278.01 139.00 34.75
1 0 1 1 1 376/27 199.39 100.00 33.33
1 1 0 0 0 352/18 280.00 140.00 35.00
1 1 0 0 1 519/26 285.81 143.00 35.75
1 1 0 1 0 486/24 289.94 145.00 36.25
1 1 0 1 1 496/24 295.91 148.00 37.00
1 1 1 0 0 440/21 300.00 150.00 37.50
1 1 1 0 1 433/20 309.99 155.00 38.75
1 1 1 1 0 419/18 333.30 166.66 41.67
1 1 1 1 1 427/23 265.82 133.33 33.33
0-Frequency is selected by hardware select, latched inputs
1- Frequency is selected by Bit 2,7:4
0- Normal
1- Spread spectrum enable ± 0.35% Center Spread
0- Running
1- Tristate all outputs
Note 1
0
1
0
Note: Default at power-up will be for latched logic inputs to define frequency, as displayed by Bit 3.
0442C—07/03/02
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