Output of XTALOUT PIN of MCU

Discussion in 'General Electronics Chat' started by aamirali, Dec 16, 2012.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    1. what the output in that case in general for any microcontroller of XTALOUT pin.

    Does output when external osc is used is:

    Fout = Fosc/machine cycle;

    2. If internal oscillator is used, then there is no output.?

    3.Like in PIC for RC oscillator of 4MHz in PIC16F877A, is there any output or zero. I saw small noise there.
     
  2. absf

    Senior Member

    Dec 29, 2010
    1,493
    372
    Try download "PICmicro MID-RANGE MCU FAMILY" from microchip and read "SECTION 2: OSCILLATOR."

    You'll have a better understanding at how the xtal oscillator inside the PIC works.

    Allen
     
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