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This document contains a sample exam paper for a course on microprocessors and microcontrollers. It has two parts - Part A contains 10 short answer questions covering topics like operating modes of 8086, interrupts, addressing modes of 8051, and differences between microprocessors and microcontrollers. Part B contains 10 multi-part questions, with students required to answer 1 question from each unit. The questions cover topics such as architecture of 8086 and 8051, memory organization, interfacing peripherals, timers, interrupts and serial communication programming.

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80 views2 pages

WWW - Manaresults.Co - In: (Common To ECE, BME)

This document contains a sample exam paper for a course on microprocessors and microcontrollers. It has two parts - Part A contains 10 short answer questions covering topics like operating modes of 8086, interrupts, addressing modes of 8051, and differences between microprocessors and microcontrollers. Part B contains 10 multi-part questions, with students required to answer 1 question from each unit. The questions cover topics such as architecture of 8086 and 8051, memory organization, interfacing peripherals, timers, interrupts and serial communication programming.

Uploaded by

Mayank Onkar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Code No: 126EM

R13
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
B. Tech III Year II Semester Examinations, October/November - 2016
MICROPROCESSORS AND MICROCONTROLLERS
(Common to ECE, BME)
Time: 3 hours Max. Marks: 75

Note: This question paper contains two parts A and B.


Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
10 marks and may have a, b, c as sub questions.

PART - A
(25 Marks)

1.a) When the 8086 processor is in minimum mode and maximum mode? [2]
b) List different types of 8086 hardware interrupts. [3]
c) Draw the 8086 flag register. [2]
d) Assume that the accumulator contains data types 82H and the instruction MOVC,
A(4FH) is fetched. List the steps in encoding and executing the instruction. [3]
e) Write the advantage and disadvantage of parallel communication over serial
communication. [2]
f) List out the important features of the A/D coverter. [3]
g) What is the difference between microprocessor and micro controller? [2]
h) List the addressing modes of 8051. [3]
i) Define baud rate of 8051. [2]
j) Mention the interrupt priority in 8051. [3]

PART - B
(50 Marks)

2.a) Explain the internal hardware architecture of 8086 microprocessor with neat diagram.
b) Draw the read and write cycle timing diagrams of 8086 in minimum mode. [5+5]
OR
3.a) Explain the concept of segmented memory. What are the advantages?
b) Discuss the physical address formation in 8086. [5+5]

4.a) Explain the various addressing modes of 8086 microprocessor with examples.
b) Write short note about assembler directives. [5+5]
OR
5.a) Explain Data transfer, arithmetic and branch instructions.
b) Write an 8086 ALP to find the sum of numbers in the array of 10 elements. [5+5]

6.a) Explain the interfacing 8279 keyboard controller with neat block diagram.
b) With neat block diagram explain the 8251 and its operating modes. [5+5]
OR
7. Explain how to interface (a) ADC and (b) DAC to microprocessor. [10]

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8.a) Explain the architecture of 8051 with its diagram.
b) Draw the Internal RAM memory organization in 8051. [5+5]
OR
9.a) Explain the I/O pins ports and circuit details of 8051 with its diagram.
b) Write an ALP to generate the 1kHz square wave form using mode 1 timer
programming. [5+5]

10.a) Explain: i) TCON ii) TMOD registers in detail.


b) How does 8051 differentiate between the external and internal program memory? [5+5]
OR
11.a) Explain how interrupts are handled in 8051.
b) Write notes on 8051 serial port programming. [5+5]

---ooOoo---

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