8051 Interrupts and Timers/Counters Quiz
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Questions and Answers

What is an interrupt in a processor?

  • An input from an external device or peripheral to inform the processor that it is ready for communication (correct)
  • A command executed by the processor to initiate communication with peripherals
  • A signal sent by the processor to external devices for synchronization
  • A process that halts the processor's operation temporarily

    • What happens when peripheral devices activate an interrupt signal?

  • The processor stops all operations immediately
  • The processor increases the clock speed
  • The processor resets the program counter value
  • The processor branches to a program called interrupt service routine (correct)

    • What does the processor do before branching to the interrupt service routine?

  • Completes the execution of the current instruction (correct)
  • Clears the program status word register value
  • Halts all operations immediately
  • Resets the interrupt flag

    • What is the purpose of the interrupt service routine?

    <p>To perform tasks requested by the interrupting device</p> Signup and view all the answers

    What action does the processor take after executing the interrupt service routine?

    <p>Returns to the main program</p> Signup and view all the answers

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