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

  • The contents of the accumulator after this operation
    MOV A,#0BH
    ANL A,#2CH
    will be


  • Options
  • A. 11010111
  • B. 11011010
  • C. 00001000
  • D. 00101000

  • Correct Answer
  • 00001000 

    • More questions

    • 1. With an OR gate, the output is HIGH only when both inputs are HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Which format requires fewer conductors?

    • Options
    • A. Parallel
    • B. Serial
    • C. Both are the same
    • D. Cannot tell
      • Discuss
    • 3. ________ is the output frequency of the counter shown below.


    • Options
    • A. 4 MHz
    • B. 20 kHz
    • C. 210.5 kHz
    • D. 800 Hz
      • Discuss
    • 4. A good example of the use of a digital representation of an analog quantity is the audio recording of music.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Which of the following RAM timing parameters determine its operating speed?

    • Options
    • A. tACC
    • B. tAA and tACS
    • C. tCO and tOD
    • D. tRC and tWC
      • Discuss
    • 6. Typically, how often is DRAM refreshed?

    • Options
    • A. 2 to 8 ms
    • B. 4 to 16 ms
    • C. 8 to 16 µs
    • D. 1 to 2 µs
      • Discuss
    • 7. The architecture of a PAL differs slightly from that of a PROM.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. CCD stands for ________.

    • Options
    • A. capacitor charging device
    • B. capacitor-capacitor drain
    • C. charged-capacitor device
    • D. charge-coupled device
      • Discuss
    • 9. Dynamic memories, such as the 2118 16K × 1 RAM, have to multiplex the address bus.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. 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

    Comments

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    invarse
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    acromyday
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    enfossy
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