MB88151
■ PIN SETTING
When changing the pin setting, the stabilization wait time for the modulation clock is required. The stabilization
wait time for the modulation clock take the maximum value of “■ ELECTRICAL CHARACTERISTICS • AC
characteristics Lock-Up time”.
ENS modulation enable setting
ENS
L
H
Modulation
No modulation
Modulation
Note : Spectrum does not spread when “L” is set to ENS. The clock with low jitter can be obtained. Because of
ENS has Pull-up resistance, spectrum spread when “H” is set to it or open the terminal.
SEL0, SEL1 Modulation rate setting
SEL1
SEL0
L
L
L
H
H
L
H
H
Modulation rate
± 1.5%
± 0.5%
− 1.0%
− 3.0%
Note : The modulation rate can be changed at the level of the terminal.
Modulation type
Center spread
Center spread
Down spread
Down spread
• Center spread
Spectrum is spread (modulated) by centering on the frequency in modulation off.
Radiation level
Modulation width 3.0%
−1.5%
+1.5%
Frequency in modulation off
Center spread example of ± 1.5% modulation rate
Frequency
6