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PIC micro MIPS

Discussion in 'Beginner Electronics' started by Richard Harris, Feb 26, 2006.

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  1. Hi,
    im a total newbie and playing with PIC micro's.
    I have a pic 16F818 and noticed that it has an internal oscillator
    that can be selected from 31kHz to 8MHz. Also the Data sheet for this
    pic states that the MIPS = oscillator frequency / 4. so at 4MHz you get
    1MIPS. But it
    does not state if this is the internal oscillator of the external one.
    The external oscillator can run up to 20MHz and the internal 8MHz.
    Am i right to assume it means the internal one and so the total number of
    instructions
    it can execute a second is (8MHz / 4) 4,000,000 ? (assuming each instruction
    takes 1 cylce).

    Thanks for your time.
     
  2. Alexander

    Alexander Guest

    The internal oscillator is optional for use (you can save parts for simple
    designs).
    This one is not very accurate compared to some other X-tals.
    For both you must the frequency must be divided by 4 for the instructions.
    Some Pics have an internal multiplier, but the 16F not is I remember
    correct.

    Alexander
     
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