Advanced Microprocessors

Advanced Microprocessors

Easy Questions

Microprocessor

8085 Microprocessors
Advanced Microprocessors
  1. An n flip-flops ripple counter can count up to—








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    A ripple counter having n-flip-flops will count upto 2n stages.
    For example: If n = 2 ⇒ 22 = 4 can count up to 4 stages means

    Correct Option: A

    A ripple counter having n-flip-flops will count upto 2n stages.
    For example: If n = 2 ⇒ 22 = 4 can count up to 4 stages means

  1. For an input pulse train of clock period T, the delay produced by an n stage shift register—








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    nT, Because in the case of shift register all the flipflops are connected in cascaded fashion.

    Correct Option: B

    nT, Because in the case of shift register all the flipflops are connected in cascaded fashion.

  1. How many flip-flop are needed to divide the frequency by 8?








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    23 = 8 means 3 flip-flop required.

    mg src = "http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-20a2.png">
    ∴ Frequency divided by 8. Hence alternative (C) is the correct answer.

    Correct Option: C

    23 = 8 means 3 flip-flop required.

    mg src = "http://images.interviewmania.com/wp-content/uploads/2019/05/Capture-20a2.png">
    ∴ Frequency divided by 8. Hence alternative (C) is the correct answer.

  1. Which of the following condition must be met to avoid race around problem where, tp is propagation delay of the NAND gate, Δt is pulse width and T is period of pulse train?








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    Condition to avoid race around problem:

    where, Δt = Pulse width
    T = Period of pulse
    2tp = Propagation delay of two NAND gates or flip-flop.
    It may be noted that tp is the propagation delay of one gate. However any flip-flop made up of 4 NAND gates or NOR gates, and any input passes through 2 gates, that's why here we must take 2tp propagation delay.

    Correct Option: B

    Condition to avoid race around problem:

    where, Δt = Pulse width
    T = Period of pulse
    2tp = Propagation delay of two NAND gates or flip-flop.
    It may be noted that tp is the propagation delay of one gate. However any flip-flop made up of 4 NAND gates or NOR gates, and any input passes through 2 gates, that's why here we must take 2tp propagation delay.

  1. What is the form of boolean expression AB + BC = Y?








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    Sum of product form

    i.e., sum of product. Hence alternative (B) is the correct answer.

    Correct Option: B

    Sum of product form

    i.e., sum of product. Hence alternative (B) is the correct answer.