W83194R データシートの表示（PDF） - Winbond
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W83194R Datasheet PDF : 11 Pages
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W83194R-630A
PRELIMINARY
Frequency table by I2C
SSEL3 SSEL2 SSEL1 SSEL0
CPU
(MHz)
0
0
0
0
66.8
0
0
0
1
100.2
0
0
1
0
83.3
0
0
1
1
133.6
0
1
0
0
75
0
1
0
1
100.2
0
1
1
0
100.2
0
1
1
1
133.6
1
0
0
0
66.8
1
0
0
1
97
1
0
1
0
97
1
0
1
1
95.2
1
1
0
0
140
1
1
0
1
112
1
1
1
0
96.2
1
1
1
1
166
SDRAM
(MHz)
100.2
100.2
124.9
100.2
75
133.6
150.3
133.6
66.8
97
129.3
95.2
140
112
96.2
166
PCI (MHz)
33.4
33.4
33.2
33.4
37.5
33.4
33.4
33.4
33.4
32.3
32.3
31.7
35
37.3
32.1
33.3
REF (MHz)
IOAPIC
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
8.2.1 Register 0: CPU Frequency Select Register (default = 0)
Bit @PowerUp
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
Pin
Description
-
0 = ±0.5% Center type Spread Spectrum Modulation
1 = ±0.75% Center type Spread Spectrum Modulation
-
SSEL2 (for frequency table selection by software via I2C)
-
SSEL1 (for frequency table selection by software via I2C)
-
SSEL0 (for frequency table selection by software via I2C)
-
0 = Selection by hardware
1 = Selection by software I2C - Bit 2, 6:4
-
SSEL3 (for frequency table selection by software via I2C)
-
0 = Normal
1 = Spread Spectrum enabled
-
0 = Running
1 = Tristate all outputs
Publication Release Date: Nov. 1999
-7-
Revision 0.65
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