IDTCV104BPV Просмотр технического описания (PDF) - Integrated Device Technology
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IDTCV104BPV Datasheet PDF : 21 Pages
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IDTCV104B
CLOCK GENERATOR FOR DESKTOP PC PLATFORMS
COMMERCIAL TEMPERATURE RANGE
SW FREQUENCY SELECTION
BS[2:0] and WBS[2:0] are band selects. Whenever there is a band switch, the user has to issue a WD soft alarm (see Byte 32 and Byte 33).
In CPU N/M programming, CPU frequency = N * resolution, N from 290 - 600.
CFS[3:0]
WDBS[2:0] or WDBS[2:0] or WDBS[2:0] or
BS[2:0] = 000 BS[2:0] = 001 BS = 010
WDBS[2:0] or WDBS[2:0] or WDBS[2:0] or WDBS[2:0] or
BS[2:0] = 011 BS[2:0] = 100 BS[2:0] = 101 BS[2:0] = 110
WDBS[2:0] or
BS[2:0] = 111
000
100
200.01
133.34
166.65
200.01
400.01
266.66
333.3
001
100.9
201.8
135.13
167.84
66.67
401.8
267.57
334.89
010
102.91
204.93
138.11
169.83
011
104.93
209.85
139.9
173.01
100
110.07
215.22
141.99
175
101
114.99
220.14
144.97
178.18
110
119.91
225.06
147.95
180.17
111
125.06
229.99
150.05
184.94
N Resolution 0.223721591 0.447443181 0.298295454
0.397727272 0.447443181 0.894886363 0.894886363
0.795454544
Corresponding N
447
447
447
419
447
447
298
419
SPREAD SPECTRUM MAGNITUDE
CONTROL (SMC)
SMC[2:0]
000
Off
001
- 0.25
010
- 0.5
011
- 0.75
100
-1
101
± 0.125
110
± 0.25
111
± 0.375
3V66-PCI/F SKEW
Skew[2:0]
000
normal, 3V66 leads PCI 2.5ns
001
move forward 200ps
010
move forward 400ps
011
move forward 600ps
100
move backward 200ps
101
move backward 400ps
110
move backward 600ps
111
move backward 800ps
AGP/PCI FREQUENCY SELECTION
AGP/PCI STRENGTH
In AGP/PCI N/M programming, AGP frequency = N * 0.223721591, N from
Str[1:0]
290 - 600
0, 0
1.2x
AFS[2:0] AGP
PCI
Corresponding N
0, 1
0.7x
000
66.67
33.33
298
1, 0
0.8x
001
68.68
34.34
307
1, 1
1x
010
70.7
35.35
316
011
72.71
36.35
325
100
74.5
37.25
333
REF STRENGTH
101
76.51
38.26
342
110
78.53
39.26
351
111
80.54
40.27
360
REF Str[1:0]
0, 0
1x
0, 1
0.8x
1, 0
1.2x
1, 1
0.7x
3
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