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Crystal selection for PIC24F series

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ElektroQuark:
Sorry.
I will try again:
Is there a preferred frequency due to a better production factor (or whatever) that makes an specific crystal more precise than others?

tecman:

--- Quote from: EdoNork on February 23, 2011, 03:48:33 pm ---Sorry.
I will try again:
Is there a preferred frequency due to a better production factor (or whatever) that makes an specific crystal more precise than others?

--- End quote ---

The clock frequency is a function of required performance, and in some cases a specific frequency requirement.  If you are using any UART functions, the data sheet will give you data on serial clock errors based on various clock/multiplier options.  Certain crystals (3.6864 MHz I believe) will give the most accurate UART frequencies.  If you are doing precise counter/timer frequency or time measurements, you may want a 4 MHz for more precise timing.

If neither of these are a factor, then any frequency would work.  Most common is to use a 4 or 8 MHz and PLL up to a higher value.  These are low cost and easy to find in many different packages.

paul

ElektroQuark:
Thank you, paul.
I didn't known the UART issue.

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