prescaler, OCR, wave Generator(Atmega8)

Discussion in 'Embedded Systems and Microcontrollers' started by frhling, Jan 30, 2014.

  1. frhling

    Thread Starter New Member

    Jan 30, 2014
    2
    0
    Hello
    here was my exam question which I couldn't solve.
    can someone help me please?
    according to the picture in attachment:

    a- a) What is the U_eff, duty cycle?
    b- b) How should be the properties of Wave Generator, Prescaler, OCR so that we have such signals?
    c c) How to get the inverse of such a signal?
    d- d) How can we have duty cycle of 20%?
    e- e) what can happen to OCR and Wave Generator if we ignore f_in?

    I could just solve part a which I am not sure if it is correct or not.
    a)
    Duty Cycle: 29,5/(29,5+49,5)= 0,421
    U_eff: 5*0,421= 2,105

    It would be great if someone can really good explain the answers.

    Thanks in advance

    best regards,
    frhling

    Ps.:Sorry I forgot to change two words: Höhenzahl= High, Niederzahl= Low
     
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