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YJGP VKOKPI KU ETKVKECN
YJGP VKOKPI KU ETKVKECN
SM532
Approved Product
Low EMI Sprectum Spread Clock
International Microcircuits,Inc.
8/31/98
525 Los Coches St., Milpitas, 95035 408-263-6300, FAX 408-263-6571
Rev. 1.4
http:/www.imicorp.com
Page 6 of 14
MODULATION AND POWER DOWN SELECTIONS
The bandwidth of the modulation applied to Fout is controlled by two input control lines, S2 and S3. Also, S2 and
S3 control the state the SM532 will go to when the Power Down mode is selected. The Power Down mode is
selected when both S0 and S1 are set to a logic state 0. Refer to the tables below for the proper selection of
Modulation Bandwidth and Power Down state.
Modulation Selection Table
Control Settings
Spread Percentage
Total Bandwidth
S3
S2
Low
High
1.25 %
0
0
99.375 %
100.625%
2.50 %
0
1
98.75 %
101.25 %
5.00 %
1
0
97.50 %
102.50 %
10.0 %
1
1
95.00 %
105.00 %
Table 6. Modulation Selection Table
Power Down Selection Table
Fout State
S0
S1
S2
S3
Factory Test
0
0
0
1
Hi-Z
0
0
1
1
00
0
0
0
10
0
1
0
Table 7. Power Down Selection Table
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