GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (Old) EXAMINATION - WINTER 2019
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Subject Code: 160903
Subject Name: Microcontroller
Time: 02:30 PM TO 05:00 PM
Date: 04/12/2019
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
-
With the help of neat sketch explain the functional block diagram of 8051
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(07)
-
Draw and explain structure of P0 and P1 ports in 8051 microcontroller
(07)
-
Write a short note on internal memory structure of 8051.
(07)
-
Explain all the bits of PSW register & hence find the control word for selecting register bank 2.
(07)
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OR
Explain the instructions 1.PUSH 2.POP 3.DJNE 4. LCALL
-
Write a program to find the average of ten 8 bit numbers stored at memory location 25H onwards. Store the result at S0H.
(07)
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-
Discuss the different types addressing modes available in 8051 with suitable illustrations
(07)
-
Write an ALP to find 2’s compliment of a number
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(07)
OR
Explain the following instruction
1. ACALL 2. DJNZ 3. RETI 4.SWAP
-
Explain TCON and TMOD special function registers. Also discuss how external interrupts can be made edge triggered by setting appropriate bits in TCON
(07)
-
Write an 8051 C program to transfer the message “WELCOME?” serially at 9600 baud 8 bit data, 1 stop bit; Do this continuously
(07)
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OR
How serial data transmission can be done using SCON and SBUF register? Which options are available to increase data transfer rate in 8051?
-
Write a C program to toggle all the bits of portQ continuously with 75ms time delay.
(07)
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-
Explain LCD interfacing with 8051 microcontroller
(07)
-
Write a short note on data types available in embedded C.
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(07)
OR
Draw and explain in brief the interfacing circuit of unipolar stepper motor with 8051
-
Explain how the speed and direction of DC motor can be controlled using microcontroller
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(07)
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