Download OU B.Sc 2019 June-July 6th and 7th Semester 3337 Microcontroller and Applications Question Paper

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FACULTY OF SCIENCE

B.Sc. VI-Semester (CBCS) Examination, May / June 2019

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Subject : Electronics

Paper - VIII-A : 8051 Microcontroller and Applications (DSE E-1)

Time : 3 Hours Max. Marks: 60

PART - A (5 x 3 = 15 Marks)

(Short Answer Type)

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Note : Answer any FIVE of the following questions.

1. What are SFR registers?
2. Give the data directives used in 8051 µC.
3. Differentiate between short jump and long jump instructions.
4. Explain how stack is implemented in 8051 µC?

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5. Write an ALP to divide any two given numbers.
6. What will be the continuous output at port-0 after the execution of the following program

   
   MOV A, #55H
   BACK: MOV P1, A
   ACALL DELAY
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   CPLA
   SJMP BACK 

7. Give the structure of SCON register.
8. Draw the matrix of a key board.

PART - B (45 Marks)

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(Essay Answer Type)

Note: Answer ALL the questions.

9. (a) Explain the architecture of Intel 8051 Microcontroller with block diagram. 11M
   OR
   (b) Explain the port organization of 8051 µC, in detail. 11M

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10. (a) List and explain the various addressing modes used in 8051 µC, with suitable examples.
    What are the addressing modes used in the following instructions
    i) MOV A, #42 ii) MOV A, R5 iii) MOV A, @R0
    OR
    (b) List and explain the various type of instructions, used in 8051 µC with suitable examples. 11M

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11. (a) Write an assembly language program to find out the largest number among the given 10 numbers. 11M
    OR
    (b) Give TMOD and TCON registers. Assume that XTAL = 11.0592 MHz. What value do we need to load in the timer's register if we want to have a time delay of 5 ms. 4+4+3M
12. (a) Give different types of serial communication. What are RS232 standards. 6+6M
    OR
    

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    (b) Explain the interfacing of ADC.