W230H Cypress Semiconductor Corp., W230H Datasheet - Page 8

• Manufacturer Part Number: W230H
• Description: Frequency Timing Generators For PC And Server Motherboards
• Manufacturer: Cypress Semiconductor Corp.

Table 6. Additional Frequency Selections through Serial Data Interface Data Bytes
Document #: 38-07224 Rev. *A
SEL_4
Bit 2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SEL_3
Bit 1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Data Byte 0, Bit 3 = 1
Input Conditions
SEL_2
Bit 6
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
SEL_1
Bit 5
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
SEL_0
Bit 4
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
100.0
100.0
100.0
133.3
133.3
133.3
102.0
104.0
106.0
107.0
108.0
109.0
110.0
112.0
113.0
114.0
115.0
116.0
118.0
120.0
124.0
127.0
130.0
136.0
140.0
145.0
150.0
155.0
160.0
166.0
111.0
CPU
95.0
Output Frequency
33.3
33.3
33.3
31.7
33.3
33.3
33.3
34.0
34.6
35.3
35.6
36.0
36.3
36.6
37.0
37.3
37.6
38.0
38.3
38.6
39.3
40.0
31.0
31.7
32.5
34.0
35.0
36.2
37.5
38.7
41.6
PCI
40
Spread Spectrum
±0.25%
±0.25%
–0.5%
±0.5%
–0.5%
±0.5%
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
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