PRELIMINARY
C9926
Low EMI Clock Generator for Intel 133MHz/ 2DIMM Chipset Systems
Spread Spectrum Clock Generation (SSCG) (Cont.)
In Center Spread mode, the Center frequency remains the same as in the non-spread mode.
Down Spread
Center Spread
Fig.8A
Fig.8B
Spread Spectrum Selection Tables
Spread
%
Spread
%
I²C BYTE5
Bit[7:5]
I²C BYTE5
Bit[7:5]
000
001
010
011
- 0.5
- 0.7
N/A
100
101
110
111
± 0.25
± 0.35
± 0.5
- 0.25
+/- 0.125
Table 4A
Table 4B
Cypress Semiconductor Corporation
525 Los Coches St.
Document#: 38-07070 Rev. **
5/4/2001
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress
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