Relation of pull up resistor to the frequency of operation

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Prerana Ghalsasi

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Hello,

Can anyone please explain me the relation of Pull up resistor value to the frequency of operation of the PIOs when pull up is used on PIOs of a controller?
 

if you are using any pin of microcontroller to send data
a 10 resistor is best choice to reduce noise .
if you are using microcontroller pin to operate any transistor then 4.7k is better choice.
 

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