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Home ‣ Digital Electronics ‣ The 8051 Microcontroller See What Others Are Saying!
  • Question

  • When the 8051 is reset and the When the 8051 is reset and the line is HIGH, the program counter points to the first program instruc line is HIGH, 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

  • Correct Answer
  • internal code memory 

    • More questions

    • 1. If both inputs of a 2-input NOR gate are connected, the gate will function as an ________.

    • Options
    • A. OR gate
    • B. AND gate
    • C. inverter
    • D. any of the above
      • Discuss
    • 2. Temperature variation is normally an analog quantity.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. What is the resolution, in percent, of a 12-bit DAC?

    • Options
    • A. 8.33
    • B. 0.049
    • C. 0.000488
    • D. 0.083
      • Discuss
    • 4. This program code will be executed once:

      STAT: MOV A, #01H
        JNZ STAT

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Which of the following commands will copy the contents of location 4H to the accumulator?

    • Options
    • A. MOV A, 04H
    • B. MOV A, L4
    • C. MOV L4, A
    • D. MOV 04H, A
      • Discuss
    • 6. The following program will cause the 8051 to be stuck in a loop:

      LOOP: MOV A, #00H
        JNZ LOOP

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. MOV A, @ R1 will:

    • Options
    • A. copy R1 to the accumulator
    • B. copy the accumulator to R1
    • C. copy the contents of memory whose address is in R1 to the accumulator
    • D. copy the accumulator to the contents of memory whose address is in R1
      • Discuss
    • 8. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The contents of the accumulator after this operation
      MOV A,#2BH
      ORL A,00H
      will be:

    • Options
    • A. 1B H
    • B. 2B H
    • C. 3B H
    • D. 4B H
      • Discuss
    • 10. The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.

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

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