Download GTU BE/B.Tech 2018 Winter 5th Sem Old 151001 Microcontroller And Interfacing Question Paper

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Subject Code: 151001

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-V (OLD) EXAMINATION - WINTER 2018
Subject Name: Microcontroller And Interfacing
Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain difference between microprocessor and microcontroller. 07
(b) List selection criteria of microcontroller for an application. 07

Q.2 (a) Write operation of the following instructions 07

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1] SWAPA [2] MOVX A,@DPTR [3] DIV AB [4] RR A
[5] XCHD A,R1 [6] MOVC A,@A+DPTR 7) MOV A,30H

Q.2 (b) List different addressing modes of programing instruction of 8051 07
microprocessor. Also explain them with a suitable example.

Q.3 (a) Write a Assembly program to multiply two 16-bit numbers for 8051 controller. 07

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OR
(b) Write a program to transfer block of 10 data from internal memory locations to 07
External memory locations for 8051 controller.

Q.3 (a) A switch is connected to P1.7. Write a program to check the status of switch and 07
perform the following.

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1. if switch = 0, send letter “N” to P2.
2. if switch = 1, send letter “Y” to P2.

Q.4 (b) Write difference between ACALL and LCALL instruction with example. 07
OR
(a) 20 bytes are stored in memory location starting from address 100H. Write a program to 07

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count the number of even, odd and zero number.

Q.4 (b) Explain difference between polling and interrupt. List types of interrupts and also 07
give its priority for execution.

Q.5 (a) Describe TMOD and TCON Special Function registers. 07
(b) Explain Serial Communication; How it will perform using 8051/52 Controller with 07

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PC? Explain it with program and diagram.
OR
(a) Write an 8051 C program to generate 5 KHz pulse waveform of 50% duty cycle 07
on pin 1.0 using timer-1 in mode-2.

Q.5 (b) Write a C program to transfer the message “Gujarat Technological University” serially 07

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at 9600 baud, 8-bit data, 1 stop bit. Perform this program for 255 times.

Q.5 (a) Draw and explain interfacing of 4K bytes External RAM and 16K bytes of ROM with 07
8051 microcontroller.

Q.5 (b) Explain interacting of 8 bit ADC with 8051. 07
OR

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(a) Draw interface of LCD with 8051. Also write a program to display “Happy” on the first 07
line and “Diwali” on the second line of the LCD.

Q.5 (b) Draw and explain interfacing of RTC with 8051 microcontroller. 07

Date: 07/12/2018
Total Marks: 70

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