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Home ‣ Digital Electronics ‣ The 8051 Microcontroller Comments
  • Question

  • Data transfer from I/O to external data memory can only be done with the MOVX command.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • The 8051 Microcontroller problems

    Search Results

    • 1. The statement LCALL READ passes control to the line labelled READ.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which of the following instructions will move the contents of the accumulator to register 6?

    • Options
    • A. MOV 6R, A
    • B. MOV R6, A
    • C. MOV A, 6R
    • D. MOV A, R6
      • Discuss
    • 3. Which of the following statements will add the accumulator and register 3?

    • Options
    • A. ADD @R3, @A
    • B. ADD @A, R3
    • C. ADD R3, A
    • D. ADD A, R3
      • Discuss
    • 4. When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:

    • Options
    • A. internal code memory
    • B. external code memory
    • C. internal data memory
    • D. external data memory
      • Discuss
    • 5. The following command will copy the accumulator to the location whose address is 23H:
      MOV 23H,A

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. This program code will be executed continuously:

      STAT: MOV A, #01H
        JNZ STAT

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. A HIGH on which pin resets the 8051 microcontroller?

    • Options
    • A. RESET
    • B. RST
    • C. PSEN
    • D. RSET
      • Discuss
    • 8. The start-conversion on the ADC0804 is done by using the:

    • Options
    • A.
    • B. CS line
    • C. INTR line
    • D. V ref/2 line
      • Discuss
    • 9. The address space of the 8051 is divided into four distinct areas: internal data, external data, internal code, and external code.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A label is used to name a single line of code.

    • Options
    • A. True
    • B. False
      • Discuss

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