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Home Digital Electronics The 8051 Microcontroller Comments

  • Question
  • A label is used to name a single line of code.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • The 8051 Microcontroller problems


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    • 1. 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
    • 2. 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
    • 3. A HIGH on which pin resets the 8051 microcontroller?

    • Options
    • A. RESET
    • B. RST
    • C. PSEN
    • D. RSET
    • Discuss
    • 4. This program code will be executed continuously:

      STAT: MOV A, #01H
        JNZ STAT

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Data transfer from I/O to external data memory can only be done with the MOVX command.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. Which of the following instructions will move the contents of register 3 to the accumulator?

    • Options
    • A. MOV 3R, A
    • B. MOV R3, A
    • C. MOV A, R3
    • D. MOV A, 3R
    • Discuss
    • 7. The binary number for octal 458 is ________.

    • Options
    • A. 100010
    • B. 100101
    • C. 110101
    • D. 100100
    • Discuss
    • 8. Convert the following BCD number to decimal.
      100000000011bcd

    • Options
    • A. 8003
    • B. 803
    • C. 1003
    • D. 103
    • Discuss
    • 9. Convert 45710 to hexadecimal.

    • Options
    • A. 711
    • B. 2C7
    • C. 811
    • D. 1C9
    • Discuss
    • 10. What decimal number does 25 represent?

    • Options
    • A. 10
    • B. 31
    • C. 25
    • D. 32
    • Discuss


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