ICS94203 查看數據表（PDF） - Integrated Circuit Systems
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ICS94203 Datasheet PDF : 18 Pages
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ICS94203
Byte 0: Functionality and frequency select register (Default=0)
Bit
Description
PWD
Bit
(2,7:4)
Bit 3
Bit 1
Bit 0
Bit2 Bit7 Bit6 Bit5 Bit4 VCO/REF VCO VCO/ CPUCLK SDRAM
FS4 FS3 FS2 FS1 FS0 Divider MHz CPU MHz MHz
0 0 0 0 0 362/13 398.71 6
0 0 0 0 1 352/14 360.00 6
0 0 0 1 0 504/18 400.91 6
0 0 0 1 1 315/11 410.02 6
0 0 1 0 0 440/15 420.00 6
0 0 1 0 1 440/14 450.00 6
0 0 1 1 0 503/15 480.14 6
0 0 1 1 1 313/9 497.95 6
0 1 0 0 0 515/37 199.29 2
0 1 0 0 1 447/40 160.29 2
66.45
60.00
66.80
68.33
70.00
75.00
80.00
83.00
99.65
80.00
99.65
90.00
100.20
102.50
105.00
112.50
120.00
124.50
99.65
80.00
0 1 0 1 0 518/37 200.45 2 100.23 100.23
0 1 0 1 1 446/31 206.00 2 103.00 103.00
0 1 1 0 0 484/33 210.00 2 105.00 105.00
0 1 1 0 1 507/33 219.98 2 110.00 110.00
0 1 1 1 0 514/32 229.99 2 115.00 115.00
0 1 1 1 1 461/11 600.06 2 200.00 200.00
1 0 0 0 0 362/13 398.71 3 132.86 132.86
1 0 0 0 1 503/15 480.14 3 160.00 160.00
1 0 0 1 0 504/18 400.91 3 133.64 133.64
1 0 0 1 1 488/17 411.02 3 137.00 137.00
1 0 1 0 0 440/15 420.00 3 140.00 140.00
1 0 1 0 1 395/13 435.05 3 145.00 145.00
1 0 1 1 0 440/14 450.00 3 150.00 150.00
1 0 1 1 1 503/15 480.14 3 160.00 160.00
1 1 0 0 0 362/13 398.71 3 132.90 99.65
1 1 0 0 1 503/15 480.14 3 160.00 100.00
1 1 0 1 0 504/18 400.91 3 133.64 100.23
1 1 0 1 1 488/17 411.02 3 137.00 102.75
1 1 1 0 0 440/15 420.00 3 140.00 105.00
1 1 1 0 1 395/13 435.05 3 145.00 108.75
1 1 1 1 0 440/14 450.00 3 150.00 112.50
1 1 1 1 1 503/15 480.14 3
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
160.00 120.00
0- Running
1- Tristate all outputs
3V66
MHz
66.43
60.00
66.80
68.33
70.00
75.00
80.00
83.00
66.43
53.33
66.84
68.67
70.00
73.33
76.67
100.00
66.43
80.00
66.82
68.50
70.00
72.50
75.00
80.00
66.93
80.00
66.82
68.50
70.00
72.50
75.00
80.00
PCICLK IOAPIC
MHz MHz
33.21
30.00
33.40
34.17
35.00
37.50
40.00
41.50
33.21
26.67
33.41
34.33
35.00
36.67
38.33
50.00
33.21
40.00
33.41
34.25
35.00
36.25
37.50
40.00
33.21
40.00
33.41
34.25
35.00
36.25
37.50
40.00
16.61
15.00
16.70
17.08
17.50
18.75
20.00
20.75
16.61
13.33
16.70
17.17
17.50
18.33
19.17
25.00
16.61
20.00
16.70
17.13
17.50
18.13
18.75
20.00
16.61
20.00
16.7
17.13
17.50
18.13
18.75
20.00
Note 1
0
1
0
Notes:
1. Default at power-up will be for latched logic inputs to define frequency, as displayed by Bit 3.
5
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