Download GTU BE/B.Tech 2018 Winter 7th Sem New 2172001 Microcontrollers And Embedded Systems Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018

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Subject Code: 2172001 Date: 15/11/2018
Subject Name: Microcontrollers and Embedded Systems
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.

MARKS

Q.1 (a) What is embedded software? What is the purpose of a watchdog timer in embedded systems? 03
(b) Differentiate between RISC & CISC architecture. 04

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(c) Design any micro-controller based application & explain with the help of a neat block diagram. 07

Q.2 (a) Write the steps to program Timer 1 in mode 2. 03
(b) WAP in C to count the no. of times an interrupt is generated upon pressing of a push button connected to INT0 and display it on P2 port. 04
(c) Draw an interfacing diagram of DC motor with 8051. WAP to generate 66% PWM signal to run the motor. 07
OR

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(c) Interface a 3x2 matrix keyboard motor with 8051. 07

Q.3 (a) What is the significance of RI & TI flags? 03
(b) Explain the bit configuration of TCON register. 04
(c) WAP in C to serially transmit the string “NEXUS” at 56kbps baud. 07
OR

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Q.3 (a) Define step angle & Holding torque. Give relation between steps per second & rpm of motor. 03
(b) Draw & explain 8051 connections to RS-232 port using MAX232 IC. 04
(c) WAP in C to count pulses fed externally on TO pin & display on P1 & P2 ports. 07

Q.4 (a) Draw the programming model of PiC18f4xx. 03
(b) State & explain instructions related to subroutines. 04

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(c) Draw & explain the memory organization in PiC18F4xx. 07
OR
Q.4 (a) Explain current sourcing with example. 03
(b) State & explain any 4 machine control instructions. 04
(c) Explain PUSH & POP instructions with a programming example. 07

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Q.5 (a) Draw internal structure of PORTB. 03
(b) Explain bit configuration of INTCON SFR. 04
(c) Write an Assembly language program to find an average of 8 numbers stored at address starting from 0x120 & save the answer. 07
OR

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(b) Explain bit configuration of registers TICON SFR. 04
(c) Write an Assembly language program to transfer a block of 10 data bytes from program memory address 0x010110 to data memory addresses starting from 0x100. 07

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