SJCIT Question Bank

Estd: 1986

Department of Electronics & Communication

SUBJECT TITLE MICROCONTROLLER

SUBJECT TYPE ELECTIVE

SUBJECT CODE BEC405A

ACADEMIC YEAR 2024 (EVEN SEMESTER) BATCH 2022-2026

SCHEME CBCS 23 SCHEME

SEMESTER IV C
FACULTY NAME and
E N Srivani, Asst. Professor
DESIGNATION
QUESTION BANK

Module -1
Q. Bloom’s
Questions COs
No. LL
1 Bring out the difference between Microprocessor and Microcontroller. L1 CO1
2 Differentiate between CISC and RISC. L1 CO1

3 Write a short note on criteria for choosing a microcontroller. L1 CO1

4 With a neat architecture diagram explain the architectural features of L2 CO1

8051 microcontroller. Define microcontroller, mention its applications.
5 With neat diagram explain the internal memory structure and L2 CO1
programming model of 8051 microcontroller.
6 With function of each pin explain the pin layout of 8051 microcontroller L2 CO1

Interpret the Interface 4k bytes RAM and 8k bytes ROM to 8051 CO1
7 microcontroller in such a way that starting address of RAM is 1000H and L3
ROM is C000H.
8 Write an interfacing diagram 8051 microcontroller interfaced to 8k bytes L3 CO1
of ROM and 8k bytes of RAM.
9 The entire 8 bits of Port 1 are accessed L4 CO1
BACK: MOV A,#55H
MOV P1,A
ACALL DELAY
MOV A,#0AAH

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MOV P1,A
ACALL DELAY
SJMP BACK
Rewrite the code in a more efficient manner by accessing the port directly
without going through the accumulator ( 2 methods) ,compile the
program using keil software and evaluate the time consuming of all the
methods.
Analyze the list file and how the code is placed in ROM

10 L5&L6 CO1

Module -2
Q. Bloom’s
Questions COs
No. LL
1 Define the 5 different addressing modes of 8051 with examples. L1 CO2
2 List and explain bit level logical instructions in 8051. L1 CO2
3 With neat diagram explain the range of JUMP instructions L1 CO2
4 Define assembler directives. With example explain all the assembler L2 CO2
directives supported by 8051 microcontrollers.
5 Explain the following instructions, also mention how many bytes it takes L2 CO2
to store in ROM:
1. DJNZ Rn, R_ADDRESS
2. JNC R_ADDRESS
3. DA A
4. MOVX A, @A+
6 Write an ALP to convert a Binary number to packed BCD number L2 CO2
(hexadecimal to decimal). The binary number is stored at 40h location.
Store the converted packed BCD number at 50h and 51h internal RAM
location.
7 Write an assembly language program to multiply 16-bit number with 8-bit L3 CO2
number and Store the result in memory.
8 Write an ALP to convert a packed BCD number into two ASCII numbers. L3 CO2

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Store the result in R5 and R6 respectively.

9 Illustrate to write an assembly language program to add two 16-bit L4 CO2
numbers loaded in R1R0 and R3R2. Store the result in R6, R5 and R4
from MSB to LSB.
10 Develop and examine to count the number of positive and negative L5&L6 CO2
numbers present in the internal memory block starting with address 20H,
containing N bytes. Store the counts after the last data byte in the memory
block.

Module -3
Q. Bloom’s
Questions COs
No. LL
1 Explain RS232 standard and 9 pin DB connector L1 CO3
2 Explain full duplex, half duplex and simplex in serial communication L1 CO3
3 Explain the bit contents of TCON and TMOD registers. L1 CO3
4 Explain mod 2 operations of timers and explain steps involved in L2 CO3
programming timer in mod 2
5 Explain the bit pattern of SCON register with diagram L2 CO3
6 Write an assembly language program to transfer multi-byte data serially L2 CO3
with 9600 baud rate.
7 Analyze the structure of TMOD and TCON register. Explain RS232 in L3 CO3
serial communication using 8051 microcontroller.
8 Write a C program to transfer "YES" serially at 9600 baud rate, 8 bit data, L3 CO3
1 stop bit, do this continuously.
9 Assuming XTAL frequency as 11.0592Mhz, write a program to generate L4 CO3
4Khz square wave on P2.1. Use timer 0 in model show all the
calculations
10 Analyze and validate following code with respect to stack. L5&L6 CO3
MOV SP, #10H
PUSH SP
POP 0E0H
ADD A, #10H

Module -4
Q. Bloom’s
Questions COs
No. LL
1 Explain programming of timer interrupts. L1 CO3
2 Explain the bit contents of IE register. L1 CO3
3 List the steps involved in executing an interrupt L1 CO3
4 Explain the structure of Interrupt priority and interrupt enable register L2 CO3

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5 Explain how multiple interrupts are handled in 8051 microcontroller L2 CO3

6 Explain interrupt vector table of 8051 microcontroller L2 CO3
7 Analyze Interrupt control used in 8051. L3 CO3
8 Explain the steps involved in Programming Serial Communication L3 CO3
Interrupts
9 Write a C program using interrupts to generate a square wave on port pin L4 CO3
P1.2 of 1kHz using timer-0 in mode 2.
10 Design and validate an ALP in 8051 to generate a square wave of L5&L6 CO3
frequency 10KHz on pin P1.2 using time1 mode 1. Assume crystal
frequency as 11.0592Mhz.

Module -5
Q. Bloom’s
Questions COs
No. LL
1 Explain the registers and pins of LCD L1 CO4
2 Explain the modes of operation of timer/counter of 8051 with diagram. L1 CO4
3 Explain the registers and pins of DC motor L1 CO4
4 Explain the interfacing of DC motor using C programming L2 CO4
5 Draw the block schematic of DAC 0808 interfaced to 8051 at port P1 and L2 CO4
write an 8051 program to generate sine wave
6 With neat diagram write an assembly language program to interface LCD L2 CO4
to 8051 microcontroller
7 With neat diagram write an assembly language program to interface DAC L3 CO4
to 8051 microcontroller.
8 Write a program to display "HELLO WORLD" by interfacing LCD L3 CO4
display to 8051 microcontroller
9 With neat diagram write an assembly language program to interface L4 CO4
ADC0804 to 8051 microcontroller.
10 Design the block schematic and explain the interfacing of stepper motor L5&L6 CO4
using 8051 microcontroller.

Note:
1. Questions shall be framed by consolidating comprehensively from the
following sources
 Exercise problems of text books/ references
 Previous year question VTU exam Question paper. (Mark the year/exam
beside the question)
 Questions by Experts during Interview/Academic Audit
 Internet sources/ other Universities examination question papers.
 Own / experience.
 Gate questions mentioning the year.
2. Questions shall follow all the Bloom’s learning levels with appropriate
action verbs

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3. There shall be a total of 50 questions considering10 questions from each

module, of which, 3 questions each at L1 and L2, 2 questions at L3, 1
question each at L4 and L5/L6.
4. Ensure the coverage of all Cos.

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