Microprocessors and Microcontrollers: AU Solved Paper
AU Solved Paper
December-2013
Microprocessors & Microcontrollers
Semester - VI (EEE)
Time:
Three Hours]
[Maximum
Marks: 100
Answer
ALL Questions
PARTA
(10 × 2 = 20 Marks)
Q.1
What are the various flags used in 8085 ?
(Refer
Two Marks Q.26 of Chapter - 1)
Q.2
What is ALE? (Refer section 1.3.3)
Q.3
What are the different addressing modes of 8085 ? (Refer
Two Marks Q.12 of Chapter - 2)
Q.4
What are the instructions associated with a subroutine? (Refer
Two Marks Q.31 of Chapter-2)
Q.5
What is the need for 8259 PIC? (Refer section 9.1)
Q.6
What are the basic modes of operations of 8255 ? (Refer
Two Marks Q.1 of Chapter - 8)
Q.7
What is instruction pipelining? (Refer Two Marks Q.4 of
Chapter - 13)
Q.8
What is the purpose of overflow flag in 8051 microcontroller? (Refer
section 14.3.5)
Q.9
Mention the interrupts of 8051 microcontroller. (Refer
Two Marks Q.12 of Chapter - 16)
Q.10
LED is connected to pin P0.7, write an assembly program to toggle the LED
forever. (Refer example 17.2.1)
PART
B (5 × 16 = 80 Marks)
Q.11
a) Draw and explain the architecture of 8085.
(Refer section 1.2) [16]
OR
b)
Explain the interrupt structure of 8085 microprocessor. (Refer
section 4.2) [16]
Q.12
a) Discuss in detail about the 8085 instruction set, explaining about the
various types of operations. (Refer section 2.2) [16]
b)
Write an assembly language program with its output to add two 16 bit numbers
two 16 bit num. using 8085. (Refer Lab expt: 2.5.5)
[16]
Q.13
a) Explain the 8255 PPI architecture with different modes by neat sketch.
(Refer sections 8.3 and 8.4) [16]
OR
b)
With neat diagram, explain the architecture and features of 8279
keyboard/display controller. (Refer sections 12.3
and 12.5) [16]
Q.14
a) Discuss about the Timers in 8051 with suitable examples. (Refer
section 16.3) [16]
OR
b)
Discuss the addressing modes of 8051 microcontroller with suitable examples. (Refer
section 15.1) [16]
Q.15
a) Write an 8051 C program that continuously gets a single bit of data from
P1.7 and sends it to P1.0, while simultaneously creating a square wave of 200
us period on pin P2.5. Use timer 0 to create the square wave. Assume that XTAL
= 11.0592 MHz. (Refer Example 16.6.10) [16]
OR
b)
A switch is connected to pin P2.7. Write a ALP to monitor the status of SW and
perform the following.
i)
If SW = 0, the stepper motor moves clockwise
ii) If SW = 1, the stepper motor moves counter clockwise. (Refer Example 17.4.3) [16]
Microprocessors and Microcontrollers: AU Solved Paper : Tag: : Semester - VI (EEE) - AU Solved Paper - 6