06000EC305122003 Pages: 2

Reg No.: Name:

Max. Marks: 100

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: EC305
Course Name: MICROPROCESSOR & MICROCONTROLLER

PARTA

Answer any two full questions, each carries 15 marks.
How the instructions are classified in 8085? Explain each type with suitable
examples.
Explain the generation of control signals for external operations in 8085 with a
neat block diagram.
Draw the timing diagram for instruction STA 2000 H. Explain the operations in
each machine cycle.
What is the need of 8279 interface in 8085? List out the features of 8279. What are
the functions of the following signals in interfacing 8279 with 8085?

i) IRQ ii) CNTL/STB iii) Ay iv) BD

Explain the architecture of 8085 with neat diagram
What are the functions of following signals in 8085

i) HOLD ii) READY iii) 10/M iv) ALE v) RESETOUT

PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.

The contents of some registers of 8086 are given below. Then find out the physical
address of the instructions given below.
SS = 3675H, DS = 2344H, BX = 0500 H, BP = 1367H , SI = 6327H

i) MOV CL, 123)

ii) MOV AL, 515111]
Explain the addressing modes in 8051 with suitable examples.

Draw and explain the components of execution unit in 8086.

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Duration: 3 Hours

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