Microcontrollers Fundamentals Quiz
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Questions and Answers

What is the primary function of a microcontroller in an embedded system?

  • To function as a peripheral device
  • To provide power supply to the system
  • To act as a standalone computer
  • To serve as the control unit (correct)

    • What type of architecture is used in the ATmega328P microcontroller?

  • Von Neumann architecture
  • RISC architecture
  • Harvard architecture (correct)
  • CISC architecture

    • What is the typical size of the program memory in an ATmega328P microcontroller?

  • 32 kB (correct)
  • 1 kB
  • 4 kB
  • 2 kB

    • What is the purpose of the DDRB register in an ATmega328P microcontroller?

    <p>To define the data direction</p> Signup and view all the answers

    What is the minimum voltage required to operate an ATmega328P microcontroller?

    <p>3V</p> Signup and view all the answers

    Why can PWM signals only be generated on specific Arduino pins?

    <p>As a result of the 3 timers/counters with 2 outputs</p> Signup and view all the answers

    What is the effect of changing the frequency on pin 3 by writing a register?

    <p>The frequency also changes on terminal 11</p> Signup and view all the answers

    What is the duty cycle on pin 3 if the analogWrite(3,78) function is used?

    <p>Almost 30%</p> Signup and view all the answers

    What is the potential of the input A0 if the result of X = analogRead(A0) is X = 5?

    <p>Approximately 24mV</p> Signup and view all the answers

    How do you signal to the microcontroller that the reference voltage is taken from an external voltage source?

    <p>By calling the analogReference(EXTERNAL) function</p> Signup and view all the answers

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