Download GTU BE/B.Tech 2019 Winter 4th Sem New 2141001 Microprocessor And Interfacing Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- IV (New) EXAMINATION - WINTER 2019

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Subject Code: 2141001 Date: 10/12/2019
Subject Name: Microprocessor and Interfacing
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q1 (a) Draw and explain flag format of 8085 microprocessor 3
(b) With the help of circuit diagram, explain generation of various control 4
signals in 8085 microprocessor.

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(c) Explain the following instructions of 8085 microprocessor 7
1. CALL 2. XCHG 3.STA 4.LXI 5. ANI 6.XRA 7.OUT

Q2 (a) Explain various addressing modes of 8085 microprocessor 3
(b) Classify 8085 microprocessor instruction set.
(c) Interface two 2732 EPROM and two 27128 RAM with 8085 microprocessor. 7

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Use 3:8 decoder for interfacing. Show necessary memory map of the
interfacing.
OR
(c) Draw and explain the functional block diagram of the 8085 microprocessor. 7

Q3 (a) List down the steps to be executed before executing an interrupt in 8085 3

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microprocessor
(b) Write an assembly loop to generate delay of 1 second in 8085 operating at 4
crystal frequency of 5MHz.
(c) Draw the timing diagram for IN 8bit instruction. List down various machines 7
cycles of IN instruction

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OR
Q3 (a) Differentiate I/O mapped I/O and Memory mapped I/O 3
(b) Write an assembly loop to generate delay of 750ms in 8085 operating at 4
crystal frequency of 6MHz.
(c) Draw the timing diagram for STA 16bit instruction. List down various 7

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machines cycles of STA instruction

Q4 (a) Write a note on working with Stack Pointer in 8085 Microprocessor 3
(b) Write a program to generate the Fibonacci sequence numbers. Generate 14 4
numbers of sequences and store it in memory.
(c) Set of 10 data bytes are stored at C500H. End of the data is indicated by 7

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FFH. Write a program that check each data byte and transfers only those data
byte that are less than (60)d and greater than (20)d to a new memory location
starting from C550H.
OR
Q4 (a) Explain CALL and RET instruction. 3

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(b) Write a program to find whether a given number is prime or not. Store the 4
result at D000H
(c) The following string is stored at memory location starting from 9100H 7

"THE QUICK BROWN FOX JUMPS OVER LAZY DOG."

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The String is stored in the ASCII format and is terminated with 00H. Write
a program to count the occurrences of each character and store the result at
location 9200H onwards

Q5 (a) List down features of 8086 microprocessor 3
(b) Draw and explain block diagram of 8259 interrupt controller IC 4

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(c) Draw and explain block diagram of 80186 microprocessor 7
OR
Q5 (a) List down the advantages of segmentation in 8086 microprocessor 3
(b) Draw and explain block diagram of 8255 peripheral interface IC 4
(c) Draw and explain block diagram of 80486 microprocessor 7

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