Advanced Microprocessors

Advanced Microprocessors

Easy Questions

Microprocessor

8085 Microprocessors
Advanced Microprocessors
  1. In a dual slope ADC, to eliminate 50 Hz pick up, the minimum period of integration of the input signal is adjusted to be …… ms.








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    The gate period is made equal to main supply period, 1/50 = 0·02 s or 20 ms. for 60 Hz, it is 16·67 ms.

    Correct Option: B

    The gate period is made equal to main supply period, 1/50 = 0·02 s or 20 ms. for 60 Hz, it is 16·67 ms.

  1. A microprocessor with a 16 bit address bus is used in a linear memory selection configuration (i.e., Address bus lines are directly used as chip select of memory chips) with 4 memory chips. The minimum addressable memory space is—








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    Each bit require one line so that for n lines, the size of memory in the address bus is 2n
    for 16 bit, 216 = 65, 536 or 64 K.

    Correct Option: A

    Each bit require one line so that for n lines, the size of memory in the address bus is 2n
    for 16 bit, 216 = 65, 536 or 64 K.

  1. In the given network of AND and OR gates

    f is—








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    In terms of Boolean Operation
    Output of 1 is x0 x1
    Output of 2 is (x0 x1 + x2)
    Output of 3 is (x0 x1 + x2) x3 = x0 x1 x3 + x2 x3
    Output of 4 is x0 x1 x3 + x2 x3 + x4
    Output of 5 is x0 x1 x3 x5 + x2 x3 x5 + x4 x5
    Output of 6 is x0 x1 x3 x5 + x2 x3 x5 + x4 x5 x6
    Thus for n gates connected as shown, the O/P:

    Hence alternative (D) is the correct answer.

    Correct Option: D

    In terms of Boolean Operation
    Output of 1 is x0 x1
    Output of 2 is (x0 x1 + x2)
    Output of 3 is (x0 x1 + x2) x3 = x0 x1 x3 + x2 x3
    Output of 4 is x0 x1 x3 + x2 x3 + x4
    Output of 5 is x0 x1 x3 x5 + x2 x3 x5 + x4 x5
    Output of 6 is x0 x1 x3 x5 + x2 x3 x5 + x4 x5 x6
    Thus for n gates connected as shown, the O/P:

    Hence alternative (D) is the correct answer.

  1. In the following question match each of the items (a), (b) and (c) on the left with an approximate item on the right—
    (a) A shift register can be used 1. 1. For code conversion
    (b) A multiplexer can be used 2. To generate memory chip to select
    (c) A decoder can be used 3. For parallel to serial conversion
    4. As a many to one switch
    5. For analog-to-digital conversion








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    NA

    Correct Option: B

    NA

  1. A carry look ahead adder is frequently used for addition because, it—








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    Carry look ahead adder is frequently used for addition because it is faster.

    Correct Option: A

    Carry look ahead adder is frequently used for addition because it is faster.