Sunday, November 28, 2021

University of Madras SAE2B DIGITAL ELECTRONICS AND MICROPROCESSORS Nov 2015 Question Paper

University of Madras Previous Years Question Papers

Year 2015

Subject: DIGITAL ELECTRONICS AND MICROPROCESSORS

NOVEMBER 2015 50408/SAE2B

Time : Three hours Maximum : 75 marks

PART A — (10 x 2 = 20 marks)

Answer any TEN questions.

1. Convert the octal number [3425]8 to binary number.

2. Calculate the binary multiplication of 10110 and

3. What is the ExOR Gate?

4. What is the role of subtractor.

5. What is a NAND latch?

6. What is meant by 32 bit microprocessor?

7. What is data transfer instruction?

8. List the addressing modes of 8085.

9. What is known as a BCD code?

10. Convert the BCD code 10101011 to HEX code.

11. Define an interrupt.

12. Write a short note on interfaces.

PART B — (5 x 5 = 25 marks)

Answer any FIVE questions.

13. Write short notes on logic gates.

14. How to simplify an expression using K-map?

15. Explain the use of JK flip-flop.

16. Explain various addressing modes of 8085 with examples.

17. Write functional diagram of 8085.

18. Write an assembly language program to convert BCD to HEX.

19. Explain 8085 interrupt system.

PART C — (3 x 10 = 30 marks)

Answer any THREE questions.

20. Explain Encoder and Decoder with logic diagram and truth table.

21. Explain the master slave flip-flop logic gates and truth table.

22. Explain different buses in 8085.

23. Write notes on Interfacing I/O devices.

24. Draw and explain the block diagram of 8085 microprocessor.

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