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

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


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

  • Correct Answer
  • 64K 

    • More questions

    • 1. Internally, a computer's binary data are almost always transmitted on parallel channels, commonly referred to as the:

    • Options
    • A. parallel bus
    • B. serial bus
    • C. data bus
    • D. memory bus
      • Discuss
    • 2. When an application, such as an encoder, calls for a unique response from a circuit corresponding to a combination of its input variables, the two methods that best serve this purpose are the ________ and the ________.

    • Options
    • A. CASE construct, truth TABLE
    • B. if then statement, elsif statement
    • C. VARIABLE, PROCESS
    • D. FUNCTION, TYPE
      • Discuss
    • 3. For the given circuit, what memory location is being addressed?


    • Options
    • A. 10111
    • B. 249
    • C. 5
    • D. 157
      • Discuss
    • 4. Refer to the given figure. What type of output arrangement is being used for the output?


    • Options
    • A. Complementary-symmetry
    • B. Push-pull
    • C. Quasi push-pull
    • D. Totem-pole
      • Discuss
    • 5. Assume you have A, B, C, and D available but not their complements. The minimum number of 2-input NAND gates required to implement the equation is ________.

    • Options
    • A. 3
    • B. 4
    • C. 5
    • D. 6
      • Discuss
    • 6. Implementation of the Boolean expression results in ________.

    • Options
    • A. three AND gates, one OR gate
    • B. three AND gates, one NOT gate, one OR gate
    • C. three AND gates, one NOT gate, three OR gates
    • D. three AND gates, three OR gates
      • Discuss
    • 7. Occasionally, a particular logic expression will be of no consequence in the operation of a circuit, such as a BCD-to-decimal converter. These result in ________terms in the K-map and can be treated as either ________ or ________, in order to ________ the resulting term.

    • Options
    • A. don't care, 1s, 0s, simplify
    • B. spurious, ANDs, ORs, eliminate
    • C. duplicate, 1s, 0s, verify
    • D. spurious, 1s, 0s, simplify
      • Discuss
    • 8. A TTL totem-pole circuit is designed so that the output transistors:

    • Options
    • A. are always on together
    • B. provide phase splitting
    • C. provide voltage regulation
    • D. are never on together
      • Discuss
    • 9. The family of logic that is composed of bipolar junction transistors is ____.

    • Options
    • A. TTL
    • B. CMOS
    • C. DIP
    • D. BJT
      • Discuss
    • 10. Applying DeMorgan's theorem to the expression , we get ________.

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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