Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VI (OLD) EXAMINATION - WINTER 2018Subject Code:160903 Date: 16/11/2018
Subject Name: Microcontroller
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q1 (a) With the help of neat sketch explain the functional block diagram of 8051 7
(b) Write a short note on I/O ports of 8051 7
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Q2 (a) What is addressing mode? Explain different addressing modes of 8051 with 7 example.
(b) What is PSW? Explain the bit significant of all the bits of PSW register 7
OR
(b) Explain the following instruction. 1. ACALL 2. DJNZ 3.RET 7 4.SWAP
Q3 (a) Give the function of following pins of 8051 (i) PSEN (ii) EA (iii) TXD (iv) 7 ALE
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(b) What is the size of RAM in Intel 8051 microcontroller? Give the RAM structure 7 of 8051 Microcontroller. OR
Q3 (a) Give the format of TCON and TMOD SFR’s. Explain how hardware control of 7 timers can be achieved through GATE bit
(b) Write a C program to generate a square wave of 50Hz at pin P2.1. 7
Q4 (a) Write an ALP to count the number of 1’s of any number in register RS and 7 put the count in register R2
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(b) Write a short note on interrupt structure & priorities of 8051. 7 OR
Q4 (a) Write an ALP to find 2’s compliment of a number & Write a short note on 7 data types available in embedded C.
(b) Draw and explain in brief the interfacing circuit of unipolar stepper motor with 7 8051.
Q5 (a) Explain the interfacing of multiple 7-segment display with 8051 7
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(b) With neat block diagram, explain how SCR firing circuit can be designed using 7 microcontroller. OR
Q5 (a) Draw & explain interfacing of matrix keyboard with 8051. 7
(b) With the help of a neat diagram explain the interfacing circuit of LCD with 8051 7
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