Download GTU B.Tech 2020 Summer 4th Sem 3141008 Microprocessor And Microcontroller Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 4th Sem 3141008 Microprocessor And Microcontroller Previous Question Paper

Seat No.: ________
Enrolment No.___________


GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? IV EXAMINATION ? SUMMER 2020
Subject Code: 3141008 Date:02/11/2020
Subject Name: Microprocessor & Microcontroller
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.
Q.1 (a) List the applications in which microcontrollers are used.
03

(b) Explain the functions of following pins of 8085.
04


1.AL G g
E 2.dgg gg
TRAP dgg g
3.Rgggg
ES df
ET Ofdf f
UT ffggggf
4.R g
EADY


(c) Discuss the flag register of 8085.
07
Q.2 (a) Differentiate between Microprocessor and Microcontroller.
03

(b) What is the use of stack and stack pointer in ATMega32? How many locations of 04
stack are used when CALL and RCALL instructions are executed?

(c) List the features of RISC Architecture.
07


OR


(c) Explain ATMega32 Data memory in detail.
07
Q.3 (a) Write a program to get status of PB3 pin and put it on PB0 pin.
03

(b) Write a program to generate square wave with 80% duty cycle on bit PC7.
04

(c) Explain following instructions:
07
1.SWAP 2.ASR 3.NEG 4.EOR 5.TST 6.SBR 7.BRCC


OR

Q.3 (a) Write a program to find no of 1s in given byte.
03

(b) How many fuse bits are available in ATMega32? How are they used?
04

(c) Explain addressing modes of ATMega32 with the example.
07
Q.4 (a) List some of the interrupt sources in ATMega32.
03

(b) What is the difference between RET and RETI instructions? Explain why we cannot 04
use RET instead of RETI as the last instruction of interrupt service routine (ISR).

(c) Assuming clock pulses are fed into pin T1 (PB1) of ATmega32.Write a program 07
for counter 1 in normal mode to count the pulses on falling edge and display the
status of TCNT1 count on PORT C and PORT D.

OR

Q.4 (a) Write down the steps to program Timer 0 in Normal Mode.
03

(b) Write a program for ATMega32 to transfer letter `Z' serially at 9600 baud rate 04
continuously
. Assume XTAL=8 MHz.

(c) Write a program in C to generate a square wave of 16 KHz on pin PORTB.3.USE 07
XTAL= 8 MHz. Use timer 0 in CTC Mode.
Q.5 (a) What is the use of input capturing? Which timers of ATMega32 can be used for 03
input capturing?

(b) Write the steps for reading data from SPI Device in single byte mode.
04

(c) Explain the connection of stepper motor with ATMega32.Write a program to rotate 07
it continuously.


OR
Q.5 (a) What is clock stretching with reference to I2C protocol?
03
(b) Draw the necessary circuit for 8 bit data transfer between ATMega32 and LCD.Use 04
PORT A of ATMega32 for 8 bit data.
(c) State the features of ADC of ATMega32 and discuss steps of ADC programming. 07
1

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