Download PTU B.Tech 2021 Jan EE 5th Sem 78311 Microprocessors Question Paper

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Roll No. | [ L[] | [ 1] Total No. of Pages : 02

Total No. of Questions : 18

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B.Tech. (Electrical & Electronics)/(Electrical Engineering)/

(Electronics & Electrical) (Sem.=5)

MICROPROCESSORS

Subject Code : BTEE-503-18

M.Code : 78311

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Time : 3 Hrs. Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Answer briefly :

1. What do you mean by CPU timing? Explain.
2. How microprocessor differentiate between data and instruction code? Explain.
3. List the advantages of higher level languages.

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4. Explain the need of stack.
5. Discuss the concept of pre-fetch queue in 8086.
6. What is memory segmentation? Explain.
7. Differentiate memory mapped I/O and Peripheral 1/0.
8. What is a flow chart? Discuss its significance.

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9. What is the function of USART? Explain.
10. Why interrupt controller is required? Explain.

SECTION-B

Discuss the following instructions w.r.z. 8085 :

a) XTHL b) DAA c) STC d) NOP and HLT e) XCHG

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Draw a flow chart and write a program to find out the largest number from a set of ten numbers stored at a memory location 2050H using 8085 microprocessor instructions.

What is the need of addressing modes? Discuss various addressing modes of 8086 microprocessor with the help of examples.

Draw a flow chart and write a program using 8086 to count from 0 to 9 with a one second delay between each count. At the count of 9, the counter should reset itself to zero and repeat the sequence continuously. The clock frequency of the microcomputer is 1 MHz.

Discuss (in detail) Mode 0 and Mode 1 of 8253 chip.

SECTION-C

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Discuss different modes of programmable peripheral interface 8255A in detail? Explain the control words of 8255 in I/O and BSR modes.

Draw and explain the architecture of 8085 microprocessor with the help of a functional block diagram.

Explain the following :

a) Hardware and software interrupts in 8086

b) Microprocessor and Microprocessor development systems

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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.