+/+…when timing is critical
C9866
Low EMI Clock Generator for Intel 815 Chipset Systems
Advanced Information
IMI Confidential
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.7A
Fig.7B
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
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.,
MILPITAS, CA 95035, USA. TEL: 408-263-6300, FAX 408-263-6571
http://www.imicorp.com
Rev 0.02
4/13/2000
Page 12 of 19
CYPRESS [ CYPRESS ]
