MB88151 Fujitsu Media Devices, MB88151 Datasheet - Page 6

• Manufacturer Part Number: MB88151
• Description: Spread Spectrum Clock Generator
• Manufacturer: Fujitsu Media Devices

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