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
    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
    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.