+/+…when timing is critical
C9836
Low EMI Clock Generator for Intel Mobile 133MHz/2 SO-DIMM Chipset Systems
Preliminary
In Center Spread mode, the Center frequency remains the same as in the non-spread mode.
Down Spread Center Spread
Figure 7a
Figure 7b
Spread Spectrum Selection Tables
I2C Byte 5
Bit
Spread
%
Spread
%
I²C BYTE 5
Bit
6
0
0
1
1
5
0
1
0
1
6
5
- 0.5
- 0.7
- 1.0
- 1.5
0
0
1
1
0
1
0
1
± 0.25
± 0.35
± 0.5
±0.75
Table 5a
(I²C BYTE 5 Bit 7=0), Down Spread
Table 5b
(I²C BYTE 5 Bit 7=1), Center Spread
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.,
MILPITAS, CA 95035, USA TEL: 408-263-6300, FAX 408-263-6571
http://www.imicorp.com
Rev 1.0
3/30/2000
Page 12 of 20
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