Download GTU BE/B.Tech 2019 Winter 4th Sem Old 140701 Microprocessor And Interfacing Question Paper

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Seat No.:

Enrolment No.

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GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER- IV (Old) EXAMINATION — WINTER 2019

Subject Code: 140701 Date: 10/12/2019

Subject Name: Microprocessor And Interfacing

Time: 10:30 AM TO 01:00 PM Total Marks: 70

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Instructions:

1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

1. Draw and Explain the functional block diagram of internal architecture of 8085 and explain its working.

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2. State the function of following instructions:

   (1) LHLD 16-bit (2) PUSH PSW (3) DAD H

   (4) RIM (5) XCHG (6) XTHL (7) PCHL

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3. Define: (i) RESET OUT (ii) HLDA (iii) READY (iv) HOLD (v) ALE

   (vi) INTR (vii)TRAP

4. Draw and explain timing diagram of Memory Read and Memory Write cycle.

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5. Write a short note on Memory Classification of 8085 Microprocessor.

6. Explain the De multiplexing the Bus AD7-ADy and also explain the generation of the Control signals.

7. Explain the function of RIM and SIM instructions in 8085.

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   OR

   Explain the concept of subroutine with help of CALL and RET instructions

8. Explain memory mapped I/O and I/O mapped I/O.

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9. Write a programme to perform multiplication of two 8 bit numbers.

10. Write a programme to find smallest number from an array of data.

    OR

    Write a programme to perform division of two 8 bit numbers.

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11. Write a programme to arrange an array of data in ascending order.

12. Describe various modes of 8253 timer.

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13. Answer the following questions:

    1. Explain any two working modes of IC 8254-Programmable interval timer.
    2. Explain importance of DMA.

    OR

    Explain 8279 Programmable Keyboard/Display Interface.

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14. Draw and explain the functional block of IC 8255A and also discuss the operating modes and control word format of 8255A.