Microprocessors and Microcontrollers: AU Solved Paper
AU Solved Paper - 57322
May-2016
Microprocessors & Microcontrollers
Semester-V (EEE) - Regulation 2013
Time:
Three Hours]
[Maximum:
100 Marks
Answer
ALL Questions
PART
A (10 × 2 = 20 Marks)
Q.1
What is the function of program counter in 8085 microprocessor? (Refer
Q.24 of chapter 1)
Q.2
Mention the purpose of SID and SOD lines. (Refer Q.5 of
chapter 1)
Q.3
What is the recursive procedures? (Refer Q.5 of chapter
3)
Q.4
Define stack and stack related instructions. (Refer
section 2.2.5)
Q.5
Explain the operating mode 0 of 8255 ports. (Refer
Q.2 of chapter 8)
Q.6
List the features of 8051 microcontroller. (Refer
section 14.2)
Q.7
What are the internal devices of a typical DAC. (Refer
section 13.2)
Q.8
What are the features used mode 2 in 8255 ? (Refer
Q.5 of chapter 8)
Q.9
Write a program to find 2's complement using 8051. (Refer
Example 15.10.6)
Q.10
How a keyboard matrix is formed in
keyboard interface? (Refer section 17.1.2)
PART
B (5 × 16 = 80 Marks)
Q.11
a) Explain with a neat block diagram the architecture of 8085 microprocessor. (Refer
section 1.2) [16]
OR
b)
i) Describe the interrupts of 8085 microprocessor.
(Refer section 4.2.2)
ii)
Explain the Timing diagram of STA 526 АH. (Refer
Example 5.4.2)
Q.12
a) i) Compare memory mapping and I/O mapping technique in 8085. (Refer
section 7.2.4.1) [8]
ii)
Write an assembly language program to sort numbers in ascending order. (Refer
lab experiment 3.1.7) [8]
OR
b)
i) Write a program to output square wave of 1 kHz frequency on the SOD pin of
8085 for 5 seconds. (Refer lab experiment 12.1.2) [8]
ii)
Describe the categories of instructions used for data manipulations in 8085
microprocessor. (Refer sections 2.2.2, 2.2.3 and 2.2.4)
[8]
Q.13
a) i) Explain the vectored interrupts in 8051 microcontroller. (Refer
section 17.7.2) [8]
ii)
Explain the different addressing modes of 8051 microcontroller. (Refer
section 15.1) [8]
OR
b)
Explain with a neat block diagram the architecture of 8051 microcontroller. (Refer
section 14.3) [16]
Q.14
a) i) Draw and explain the functional block diagram of 8254 timer.
(Refer section 10.2) [8]
ii)
Draw and explain the functional block diagram of 8251. (Refer
section 11.4)
OR
b)
With neat diagram, explain the architecture and features of 8279 keyboard
display controller. (Refer sections 12.3 and 12.5) [16]
Q.15
a) Explain with a neat diagram the closed loop control of servo motor using
microcontroller. (Not in new syllabus) [16]
OR
b)
A switch is connected to pin P2.7, write a ALP to monitor the statues of switch
and perform the following: [16]
i)
is sw = 0 stepper motor moves clockwise
ii)
if sw = 1 stepper motor counter clockwise. (Refer
Example 17.4.3)
Microprocessors and Microcontrollers: AU Solved Paper : Tag: : Semester-V (EEE) - AU Solved Paper - 57322 - set 10