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capacitor value for the oscillator?

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asic1984

asic1984

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hi
what is the suitable capacitor value for osciallator capacitor which is 20MHZ or 10 MHZ for pic 16f877

thanks
 

I'am using from 18 to 33pF ( usually 22pF ). I thing that range is not a critical.
 

Hi,

Look at the datasheet page 123.

SphinX
 

    asic1984

    asic1984

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I believe the formula is Cload = (2Cosc) // (Cboard), where Cboard is typically 5pf, and Cload is specified by the Oscillator.
 

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