Reg No.:

Max. Marks: 100

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03000EE309092001

Pages: 2

Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY

Fifth Semester B.Tech Degree Regular and Supplementary Examination December 2020

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Course Code: EE309
Course Name: MICROPROCESSOR AND EMBEDDED SYSTEMS

PARTA
Answer all questions, each carries5 marks.

Discuss the addressing modes of 8085 microprocessor with an example for
each.
Sketch the timing diagram of LDA 4500
Explain the control word register of 8255
Compare hard and soft real time systems
List any five logical instruction of 8051
Explain the multifunction of Port 3 of 8051
Explain the data types and directives of 8051
What is simplex, half duplex and full duplex in serial communication

PART 0
Answer any two full questions, each carries 10 marks.

Write a program to convert a packed BCD number stored in location 2200 to
binary and store in location 2230

Explain CALL and RETURN instructions

Describe the following 8085 instructions (1) DAD Rp (11) CMP M

Write a delay subroutine using register pair

Explain in detail the different flags of 8085

Discuss instruction cycle, machine cycle and T state of 8085

PART C
Answer any two full questions, each carries 10 marks.

Write a short note on different interrupts in 8085

List any five application domain of embedded system

Design an interfacing circuit for one 4K x 8 RAM and one 4K x 8 EPROM
with 8085 microprocessor and find the memory address range

Explain the BSR operation of 8255 PPI

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Duration: 3 Hours

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