Microprocessor I/O Operations
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Questions and Answers

What does a low output on the IO/M control pin from the microprocessor indicate?

  • A memory operation is taking place (correct)
  • An I/O operation is taking place
  • The microprocessor is idle
  • An interrupt is occurring

    • Which type of instruction execution makes the IO/M pin HIGH?

  • IN or OUT instruction (correct)
  • MOV instruction
  • Arithmetic operation instruction
  • Conditional jump instruction

    • How many I/O ports can an 8-bit microprocessor directly address?

  • 64 ports
  • 1024 ports
  • 256 ports (correct)
  • 8 ports

    • How many bytes of memory can a standard 8-bit microprocessor directly address using 16 address lines?

    <p>64K bytes</p> Signup and view all the answers

    Which type of instruction execution makes the IO/M pin LOW?

    <p>MOV instruction</p> Signup and view all the answers

    How many I/O ports can a standard 8-bit microprocessor directly address?

    <p>256 ports</p> Signup and view all the answers

    What is the purpose of the IO/M control pin on the µp chip?

    <p>To enable I/O port communication</p> Signup and view all the answers

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