Previous Year Exam Questions for Microcontroller and Applications - MCA of 2017 - bput by Verified Writer

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Registration no: Total Number of Pages: 01 B.Tech. PEEI5401 7th Semester Regular / Back Examination 2017-18 Microcontrollers and Applications BRANCH: AEIE, EIE, IEE Time: 3 Hours Max Marks: 70 Q.CODE: B379 Answer Question No.1 which is compulsory and any five from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) Answer the following questions : What are SFRs? Are they bit addressable? Explain the instruction MOVX A,@DPTR. Explain the Machine Cycle , Pulse time and T State. d) e) f) g) h) i) j) What are assembler directives and explain any two of them. What is the difference between timer and counter operation of 8051? What are the interrupts present in PIC 16F877 microcontroller? Draw the format of timer control register (TCON). What is a Watch dog timer? Explain the different timer modes in PIC microcontroller. Explain pipelining in PIC microcontroller. Q2 a) b) Explain different addressing modes for ORL instruction Write an Assembly language program for 8051 to copy a block of data 10 bytes long from Ram locations starting at 35H to RAM locations starting at 60H. (5) (5) Q3 a) Write an 8051 assembly language program to generate square wave using DAC. Draw the necessary diagram. Compare the power down and idle mode of 8051 microcontroller. (5) Write a program to transmit letters 'CITYBUS' to serial COM port using 8051 at 9600 baud rate. Assume XTAL = 11.0592 MHz. Write a 8051 program to output 55H and AAH alternately, on port 0 and 1of 8255 IC. (5) b) Q4 a) b) (2 x 10) (5) (5) Q5 a) b) Explain capture mode and compare mode of PIC microcontroller. Write assembly language or Embedded C program for PIC to toggle bits of port B, Port C and port D continuously with delay. (5) (5) Q6 a) b) Explain various addressing modes of PIC16F877. Write assembly codes for PIC16F877 to generate a square wave. (5) (5) Interface HEX keypad and seven segment display to 8051 and write assembly language program to display the key pressed on the display. (10) Q7 Q8 a) b) c) d) Write short answer on any TWO : Architecture of PIC 18FXX Square Root Calculations LCD Interfacing with 8051 Flash Program EEPROM (5 x 2)