ROLL NUMBER
Question Paper Code: 233EE005 QRN Code: 2310096 Regulation: 2019
B.E./B.Tech., DEGREE EXAMINATION, NOV’ / DEC’ 2023
SIXTH SEMESTER – B.E. ELECTRICAL AND ELECTRONICS
ENGINEERING
19EECN2601 – MICROPROCESSOR AND MICROCONTROLLER
Duration: Three hours Answer ALL questions Maximum: 100 marks
Revised Bloom’s
CO
PART – A (10 x 2 = 20 marks) No.
Cognitive Level
Question CO
1. Assemble the following program, starting with CO1 U U
memory address 2020H.
MVI A,8FH
MVI B,55H
SUB B
ANI 0FH
STA 2070H
HLT.
2. List the four operations commonly performed CO1 R U
by the Microprocessor.
3. Calculate the number of memory chips needed CO2 U U
to design 8KB memory if the memory chip size
is 1024X8.
4. State the purpose of 8259 A interrupt CO2 R U
controller.
5. Write the embedded C program toggles all the CO3 Ap Ap
bits of PORTB.
6. List the features of PIC18F4420. CO3 R Ap
7. Compare Timer and Counter. CO4 U Ap
8. Calculate the Dout if analog input is 2.1V and CO4 Ap Ap
Vref=2.56V for 8bit ADC.
9. Define step angle. CO5 R Ap
10. Draw the pin diagram of DS1306. CO5 R Ap
CO Revised Bloom’s
PART – B (5 x 16 = 80 marks) Marks No. Cognitive Level
Question CO
11.(a) (i) Explain the 8085 bus structure in detail. 8 CO1 U U
(ii) Illustrate the data flow from the memory 8 CO1 U U
to Microprocessor, when instruction
code 0100 1111(4FH - MOV C,A),
stored in a location 2005H is being
fetched.
Or
11.(b) Explain the internal operation of an 8 bit 16 CO1 U U
processor with relevant diagrams.
12.(a) With a neat Diagram explain the internal 16 CO2 U U
architecture of keyboard and display
controller IC8279.
Or
12.(b) (i) Draw the Block diagram of 8259(PIC) 8 CO2 U U
and explain the blocks.
(ii) Describe how 8279 keyboard and 8 CO2 U U
Display controller is interfaced to 8085.
13.(a) (i) Explain in detail about the program 8 CO3 U Ap
ROM memory of PIC 18 with example
programs.
(ii) Write an embedded C program to save 8 CO3 U Ap
the array of 100 numbers in RAM and
send the copy of data to PORTB for
count down from 0xFF with time delay
of 500ms.
Or
13.(b) Sketch the architecture of PIC 18F456 16 CO3 U Ap
microcontroller, describing its operation.
14.(a) Explain in detail about PWM 16 CO4 U Ap
programming and its registers
configuration.
Or
14.(b) (i) Write a C18 program to toggle only the 8 CO4 Ap Ap
PORTB. 4 bit continuously every 50ms.
Use Timer0, 16bit mode, the 1:4
prescaler to create the delay. Assume
XTAL=10MHz.
(ii) Explain the ADC features programming 8 CO4 U Ap
method and its register configurations.
15.(a) A switch is connected to pin RD7.Write 16 CO5 U Ap
a C program to monitor the status of SW
and perform the following.
(a)If SW=0,the stepper motor moves
clockwise
(b)If SW=1, the stepper motor moves
counter clockwise. Also draw and
explain the PIC connection with the
stepper motor.
Or
15.(b) (i) Describe the 4x4 keypad interface with 8 CO5 U Ap
PIC microcontroller with neat diagram.
(ii) Explain in detail about the LCD display 8 CO5 U Ap
Interface with PIC microcontroller.
% in
Sl. Cognitive
Code Order Question
No. Level
Paper
1 Remember R
Lower
2 Understand U 100
Order
3 Apply Ap
4 Analyze An
Higher
5 Evaluate E -
Order
6 Create C
