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Home ‣ Digital Electronics ‣ The 8051 Microcontroller Comments
  • 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 

    • The 8051 Microcontroller problems

    Search Results

    • 1. 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
    • 2. The total amount of external code memory that can be interfaced to the 8051 is:

    • Options
    • A. 32K
    • B. 64K
    • C. 128K
    • D. 256K
      • Discuss
    • 3. Data transfer from I/O to external data memory can only be done with the MOV command.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. 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
    • 5. 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
    • 6. Both registers TL0 and TL1 are needed to start Timer 0.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Microcontrollers often have:

    • Options
    • A. CPUs
    • B. RAM
    • C. ROM
    • D. all of the above
      • Discuss
    • 8. An alternate function of port pin P3.4 in the 8051 is:

    • Options
    • A. Timer 0
    • B. Timer 1
    • C. interrupt 0
    • D. interrupt 1
      • Discuss
    • 9. The 8051 has ________ 16-bit counter/timers.

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
      • Discuss
    • 10. The total external data memory that can be interfaced to the 8051 is:

    • Options
    • A. 32K
    • B. 64K
    • C. 128K
    • D. 256K
      • Discuss

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