Selecting a crystal frequency

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  1. - 5th May 2010, 06:19 #1
    lilimike's Avatar
    lilimike
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    It was mainly a general question.

    So what makes the difference is power consumption?

    If power is not an issue then I could use the fastest crystal supported by the PIC and it wouldn't cause an issue?
  2. - 5th May 2010, 06:36 #2
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    mackrackit
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    Quote Originally Posted by lilimike View Post
    If power is not an issue then I could use the fastest crystal supported by the PIC and it wouldn't cause an issue?
    In general yes.
    A chip running a 4Mhz will have a different resolution for the commands than say a 20MHz:
    COUNT
    PULSIN
    PULSOUT
    PWM
    and maybe others I am not thinking about. So if you need a wider resolution then a slower OSC will be needed.

    But in general, crank it up!!! It does not hurt the chip.
    Dave
    Always wear safety glasses while programming.
  3. - 5th May 2010, 06:43 #3
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    Got it!

    Thank you Dave

    Mike
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