Microcontrollers In-SEM Exam(Aug-2017) Model Answer Paper

Updated on 2017/11/23 22:27

Model Answer Paper for Microcontrollers

Note: Model answers and marking scheme is totally based on my knowledge and experience. This model answer is not provided by SPPU. There may be changes in marking scheme of SPPU Exam panel.

Question 1

a) Draw and explain the block diagram of 8051 in short (5 Marks)

Block Diagram

2 Marks
Explaination3 MarksWikiNote: Explained

b) Explain the following instruction with operation, addressing mode, number of cycles and time required to execute the following instruction (5 Marks)

i) DJNZ Rn, X5 Marks
 
WikiNote: Branch instruction
ii) MOVC A,@A+DPTRWikiNote: Data transfer instruction
iii) DAAWikiNote: Arithmetic Instruction

OR

Question 2

a) Draw and explain in depth functional diagram of Timer/Counter (5 Marks)

Timer/Counter functional diagram2 MarksWikiNote: Timer/Counter functional diagram
Timer 0 is explained here
Explaination3 MarksWikiNote: Explained

b)  Write an ALP to transfer GOD continuosly at the baud rate of 9600 (5 Marks)

Calculation of value to be loaded in TH1 Register to set baud rate=9600

2 Marks
Assembly language program3 Marks

WikiNote: Program

Question 3

a) Draw an interfacing diagram for 7-segment display connected to port 1 and write an ALP to display BCD counter(5 Marks)

Interfacing Diagram 2 MarksWikiNote: Interfacing Diagram
Assembly language program3 MarksWikiNote: Program
WikiNote: Proteus Simulation and Video Explaination

b) Draw and explain block schematic of Logic Analyzer (5 Marks)

Block Diagram3 MarksWikiNote: Block Diagram
Explaination2 MarksWikiNote: Explained

OR

Question 4

a) Draw an interfacing diagram of 4x4 matrix keypad and draw flowchart to detect key pressed (5 Marks)

Interfacing Diagram 2 MarksWikiNote: Interfacing Diagram 
Flowchart3 Mark

WikiNote: Flowchart 
Note :- Students can develop flowchart  from the Program present here

b) Draw an interfacing diagram for LCD and write an ALP to display GANESH on line 2 with default values  (5 Marks)

Interfacing Diagram 2 MarksWikiNote: Interfacing Diagram 
Assembly language program3 MarksWikiNote: Program
WikiNote: Proteus Simulation and Video Explaination

Question 5

a) Draw an interfacing diagram of DAC and write an ALP to generate square waveform of 2 KHz with delay using timer 1 in mode0 (5 Marks)

Interfacing Diagram 2 Marks WikiNote: Interfacing Diagram
Timer delay calculations1 Mark 
Assembly language program3 Marks WikiNote: Program

b) Draw an interfacing diagram of stepper motor and write an ALP to rotate it anti-clockwise continuosly (5 Marks)

Interfacing Diagram 2 MarksWikiNote: Interfacing Diagram 
Assembly language program3 Marks WikiNote: Program

OR

Question 6

a) Draw an interfacing diagram for Opto-isolator and write an ALP to flash lamp connected to it with delay of 10milli-seconds  (5 Marks)

Interfacing Diagram 2 Marks WikiNote: Interfacing Diagram 
Assembly language program3 Marks WikiNote: Program

b) Draw a DAS to display the frequency of external signal on 7-segment display with LED indicator for highest value, Draw the flow chart (5 Marks)

Interfacing Diagram2 MarksWikiNote: Interfacing Diagram
Flow chart3 MarksWikiNote:Flow chart
Note :- Students can develop flowchart from the program

References

  • Marking scheme and Notes by Prof. Sujit wagh, SKNCOE, Pune
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Created by Sujit Wagh on 2017/08/11 15:58