Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2173203 Microprocessor And Microcontroller Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2173203 Date:19/01/2021
Subject Name:Microprocessor and Microcontroller
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Write an AVR C program to get a byte of data from Port C. If
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it is less than 100, send it to Port B; otherwise, send it to Port
D.
(b) Explain and Draw the control signal generation in 8085
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Microprocessor.
(c) List out the addressing modes for the AVR Controller and
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explain any two of them.
Q.2 (a) Write an AVR C program to toggle all the pins of Port B
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continuously by Using the Ex-OR operator.
(b) Explain Flag register PSW of 8085 Microprocessor.
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(c) Write a program to toggle all the bits of the I/O register PORT
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D every 2 s. Assume that the crystal frequency is 8MHz and
system is using an ATmega32.
Q.3 (a) Explain AVR status register in detail.
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(b) A switch is connected to pin PB5. Write a program to monitor the
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status of the SW and perform the following.
1. If SW = 0, send the letter `B' to PORT C.
2. If SW = 1, send the letter `Y' to PORT C.
(c) Explain architecture of the 8051 microcontroller.
07
Q.4 (a) With Fosc =8 MHz, Find the UBRR value needed to have the
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following baud rates.
1. 9600 2. 4800
(b) List out features of RISC and give comparison between RISC
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& CISC processors.
(c) Explain the Pin Diagram of the 8085 microprocessor.
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Q.5 (a) Explain Logical Instruction with example for the AVR
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Controller.
(b) Design 16*8 register using 4*8 register chips for the microprocessor
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8085.
(c) Write a C program to toggle only the PORT B.4 bit
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continuously every 70 ?s. Use Timer 0, Normal mode and 1:8
prescaler to create the delay. Assume XTAL=8MHz.
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Q.6 (a) Write down different steps in executing an Interrupt.
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(b) Write a Program to (a) load the PORT B register with value
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0?55, and (b) Complement PORT B 300 times.
(c) With diagram explain architecture of AVR microcontroller and
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also draw and explain the Harvard architecture in the AVR.
Q.7 (a) Explain criteria for choosing a microcontroller.
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(b) Draw and explain TIFR register in AVR.
04
(c) Explain interfacing of LCD with AVR using program to
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display "GOOD LUCK" on LCD for AVR controller.
Q.8 (a) Write a short note on AVR Family.
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(b) Write a program to transmit the message "YES" serially at 9600
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baud, 8 bit data and 1 stop bit. Do this forever.
(c) Draw & Explain the RTC interfacing diagram with AVR
07
Microcontroller.
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This post was last modified on 04 March 2021