GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (Old) EXAMINATION — WINTER 2019
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Subject Code: 151001 Date: 06/12/2019
Subject Name: Microcontroller And Interfacing
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) State different addressing modes in 8051 microcontroller. Explain each with example. [07]
(b) Explain basic architecture of 8051 microcontroller. [07]
Q.2 (a) Explain following 8051 instructions with an example. [07]
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(1) MUL AB (2) SUBB A,R0 (3) RR A (4) SWAP A (5) ANL C, Bit (6)XCHD A,RO (7)RLC A.
(b) Write a Program to Generate delay of 20 msec in 8051. [07]
OR
(b) Write an assembly language program to transfer a block of 15 data bytes stored at D000 onwards to EOO0 onwards. [07]
Q.3 (a) Write an assembly language program to generate square wave of 5 KHz Frequency on pin P1.5 Use Timer 0 in Mode 1. [07]
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(b) Discuss the hardware scheme to interface external 32K EPROM and 16K RAM memories with microcontroller. [07]
OR
Q.3 (a) Explain 8 bit ADC and Explain interfacing of same with 8051 [07]
(b) Describe TMOD and TCON Special Function registers. [07]
Q.4 (a) Explain RS 232 connector and respective handshaking signals. [07]
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(b) 16X2 LCD is connected to 8051 microcontroller. Write assembly language program to display “Hello World” on LCD. [07]
OR
Q.4 (a) Draw and explain interfacing of RTC with 8051 microcontroller. [07]
(b) Interface a Matrix Keyboard with 8051 and draw the flow chart to detect a switch pressing. [07]
Q.5 (a) Draw and explain DC motor control with optoisolater and PWM. [07]
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(b) Write a C-language Program to transfer the message “Hello” Serially at 9600 baud, 8 bit data, 1 stop bit. Do this continuously. Xtal =11.0592MHz. [07]
OR
Q.5 (a) Compare microprocessors with microcontrollers. [07]
(b) Draw pin diagram of 8051 microcontroller. [07]
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