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capture module resolution pic16f877a

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Anuradha1

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Hello,


According to the data sheet pic16f877 has two capture modules. It is mentioned (page 1 of the data sheet) that the maximum resolution of the capture module is 12.5ns.


Can some 1 explain what is meant by this?


Thank you.
 

jumper2high

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It means the minimal time difference between two captures hast o be 12.5 nano seconds :)


The CCP module (in capture mode) records the current value of a 16 bit timer the moment you put it's respective CCP pin to high (or low if set up by software).
 

    Anuradha1

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Anuradha1

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jumper2high said:
It means the minimal time difference between two captures hast o be 12.5 nano seconds :)


The CCP module (in capture mode) records the current value of a 16 bit timer the moment you put it's respective CCP pin to high (or low if set up by software).
Thanks.

It sounds that I can capture a signal which changes within 100ns. Isn't it?

Is there a way to know how many times it counts within 100ns. Is it 100/12.5?

or do i have to think of my oscillator frequency which is 4MHz?

Hoping a soon reply.
 

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