W230-03 Datasheet, PDF (8/15 Pages) Cypress Semiconductor – Spread Spectrum FTG for VIA K7 Chipset

PRELIMINARY
W230-03
Table 6. Additional Frequency Selections through Serial Data Interface Data Bytes
Input Conditions
Output Frequency
Data Byte 0, Bit 3 = 1
Bit 2
SEL_4
Bit 1
SEL_3
Bit 6
SEL_2
Bit 5
SEL_1
Bit 4
SEL_0
CPU
PCI
Spread Spectrum
1
1
1
1
1
100.0
33.3
–0.5%
1
1
1
1
0
100.0
33.3
OFF
1
1
1
0
1
100.0
33.3
±0.5%
1
1
1
0
0
95.0
31.7
OFF
1
1
0
1
1
133.3
33.3
–0.5%
1
1
0
1
0
133.3
33.3
OFF
1
1
0
0
1
133.3
33.3
±0.5%
1
1
0
0
0
102.0
34.0
OFF
1
0
1
1
1
104.0
34.6
OFF
1
0
1
1
0
106.0
35.3
OFF
1
0
1
0
1
107.0
35.6
OFF
1
0
1
0
0
108.0
36.0
OFF
1
0
0
1
1
109.0
36.3
OFF
1
0
0
1
0
110.0
36.6
OFF
1
0
0
0
1
111.0
37.0
OFF
1
0
0
0
0
112.0
37.3
OFF
0
1
1
1
1
113.0
37.6
OFF
0
1
1
1
0
114.0
38.0
OFF
0
1
1
0
1
115.0
38.3
OFF
0
1
1
0
0
116.0
38.6
OFF
0
1
0
1
1
118.0
39.3
OFF
0
1
0
1
0
120.0
40.0
OFF
0
1
0
0
1
124.0
31.0
OFF
0
1
0
0
0
127.0
31.7
OFF
0
0
1
1
1
130.0
32.5
OFF
0
0
1
1
0
136.0
34.0
OFF
0
0
1
0
1
140.0
35.0
OFF
0
0
1
0
0
145.0
36.2
OFF
0
0
0
1
1
150.0
37.5
OFF
0
0
0
1
0
155.0
38.7
OFF
0
0
0
0
1
160.0
40
OFF
0
0
0
0
0
166.0
41.6
OFF
Document #: 38-07357 Rev. *A
Page 8 of 15