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E1156 Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION(S), MAY 2019

Course Code: EC305
Course Name: MICROPROCESSOR & MICROCONTROLLER

PARTA

Answer any two full questions, each carries 15 marks.
List the functional blocks of a microprocessor. Explain each block.
Illustrate a typical microprocessor based system. Explain each block.
What are the main features of fourth generation microprocessors? Give any three
examples.
Define the function of the following signals of 8085 microprocessor.
i) IO/M
ii) ALE
iii) RESET IN
iv) SID
What are the different addressing modes used in 8085? Explain the instruction
STAX rp. What is the addressing mode used in this instruction?
List the different modes of operation of 8255 PPI.

PART B

Answer any two full questions, each carries 15 marks.
List the flags used in 8086 microprocessor and explain their functions.
What is a segment register? List the segment registers in 8086.
Broadly classify instruction set of 8051. Give 2 examples for each class.
Compare programmed input output data transfer with interrupt driven input output
data transfer.
List the special function registers in 8051 microcontroller.
Compare a microcontroller with a microprocessor in terms of architectural

features.

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Duration: 3 Hours

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