Download AKTU B-Tech 5th Sem 2017-2018 NEC503 Microprocessor Question Paper

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Printed pages: 02 Roll No.

Paper Id: 3052

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Sub Code: NEC503

B. TECH.

(SEM V) THEORY EXAMINATION 2017-18

MICROPROCESSOR

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Note: 1. Attempt all sections. If require any missing data; then choose suitably.

2. Any special paper specific instruction.

SECTION - A

1. Attempt all questions in brief: 2x10=20

1. What is a microprocessor? What is the technology used in microprocessors?

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2. What are the different buses and what jobs they do in a microprocessor?
3. Draw the basic block diagram of microprocessors and discuss the same.
4. The address capability of 8085 is 64 KB. Explain.
5. How many instructions 8085 can support?
6. Mention the addressing modes of 8085.

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7. Explain the concept of Memory segmentation in 8086 microprocessor.
8. How many hardware interrupts 8085 supports?
9. How many I/O ports can 8085 access?
10. Why the lower byte addresses bus (A0 – A7) and data bus (D0 – D7) are multiplexed?

SECTION - B

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2. Attempt any three of the following: 10x3=30

1. Draw the architecture of 8085 and mention its various functional blocks.
2. Explain different types of interrupts in 8085 Microprocessors.
3. Draw the pin diagram and functional block diagram of 8254.
4. Explain the difference between IO mapped IO and Memory Mapped IO interfacing technique.

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5. Explain PPI (8255) with its block diagrams. Also explain its operating modes.

SECTION – C

3. Attempt any one part of the following: 10x1 =10

1. Explain the features and architecture of 8086 Microprocessors. Mention the jobs performed by BIU and EU.
2. What are interrupt? Explain types of interrupt in 8086.

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4. Attempt any one of the following: 10 x 1 =10

1. Explain ALE, HOLD, READY, S0, S1 SIGNALS for 8085 microprocessor.
2. Design a hexadecimal up counter which count from 00H to FFH in a system with a 1.0 µs clock period.

5. Attempt any one of the following: 10 x 1 =10

1. Write a program to add two 16-bit numbers for 8085mp.

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2. Explain PPI (8255) with its block diagrams. Also explain its operating modes.

6. Attempt any one of the following: 10 x 1 =10

1. Explain the operation of 8254 in mode 3. Briefly explain 8254 as a counter?
2. Design a system for 8085 such that it contain 4KB of EPROM and 2KB of RAM using two 2KB of EPROM and two 1KB of RAM. Draw the complete interfacing diagram.

7. Attempt any one of the following: 10 x 1 =10

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1. Draw the block diagram of 8251 USART and explain each block. Also draw its interfacing with 8086.
2. With the help of a functional block diagram and working of 8257 DMA controller.

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