# PTU B.Tech ECE 6th Semester May 2019 58033 MICROCONTROLLER AND ITS APPLICATIONS Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 6th Semester Electronic and Communication Engineering (ECE)

Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(EIE) (2011 & Onwards E-II) (Sem.?6)
MICROCONTROLLER AND ITS APPLICATIONS
Subject Code : DE-2.4
M.Code : 58033
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION-A
1.

a) List the priority of interrupts in 8051.

b) What is the address of 23th bit in bit addressable area?

c) What is the value of stack pointer in 8051 on being reset?

d) What is the difference between polling and interrupt?

e) Write the TMOD register.

f) Which port of the 8051 is used as low order address bus?

g) What are the various flags in microcontroller 8051?

h) What is the function of the instruction SWAP?

j) What is the function of the program counter?
1 | M - 58033

(S2)-1586

SECTION-B
2.
Explain the interrupt execution in 8051 microcontroller

3.
Draw and explain the timing diagram for Opcode fetch cycle.

4.
What do you mean by the addressing mode? Explain the various addressing modes of
8051 details with the help of examples.

5.
Write a program to divide two numbers using successive division method.
6.
Explain the concept of lookup table for 8051 .

SECTION-C
7.
Explain the interfacing of 8051 with DC motor

8.
Explain the architecture of the 8051 with a labeled and neat diagram.

9.
Write a program to put ten numbers in an ascending order stored at memory location
2000h.

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