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PIC18F2550, USB+internal oscillator+PLL

 
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Peter
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PIC18F2550, USB+internal oscillator+PLL
PostPosted: Tue Sep 18, 2007 12:16 pm     Reply with quote
Hi folk Smile

Been just checking the data sheet of PIC18F2550 - I wonder whether there is any chance to run PIC and USB cores from its internal oscillator. From block diagrams I cannot see this is viable, but you may know some tricks ... (?) I know USB cannot be run from an internal oscillator due to its worse stability, etc., but I would love to try and play around this if I knew how.

Kind regards,
Peter.
Ttelmah
Guest
PostPosted: Tue Sep 18, 2007 1:24 pm     Reply with quote
No.
The USB circuitry _requires_ an external clock.

Best Wishes
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