Reg No.:

Max. Marks: 100

12

13

a)
b)

00000CS305121902

Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth semester B.Tech degree examinations (S) September 2020

Course Code: CS305
Course Name: MICROPROCESSORS AND MICROCONTROLLERS

PARTA
Answer all questions, each carries3 marks.
Explain logical memory organization of 8086.
Explain memory read operation in minimum mode of 8086 with the help of a
timing diagram.
Explain the usage of the following assembler directives with suitable example.
a) EQU b)SEGMENT c)ASSUME
Explain the working of the following instructions with suitable example.
a) IN b)SAR
PART B
Answer any two full questions, each carries9 marks.
Write an 8086-assembly language program to find even numbers from an array
of n, 8-bit numbers and store the even numbers in a separate array.
Explain maximum mode configuration of 8086 microprocessor
Differentiate 8086 and 8088 microprocessors.
Explain 8086 macro definition and macro call with suitable example.
PART C
Answer all questions, each carries3 marks.
Explain various categories of interrupts available in 8086.
Explain the interfacing of an IO device to 8086 using peripheral IO method.
Explain how the priority resolver block of 8259 select the request to be served
next.
Explain output modes of 8279, programmable keyboard/display interface.
PART D
Answer any two full questions, each carries9 marks.
Explain the Mode 2 operation of 8255.
What are the activities done by 8086 on receiving an interrupt request?
What is meant by maskable and non-maskable interrupts?

Write the role of 8259A, Programmable Interrupt Controller.

Duration: 3 Hours

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