RTU 2016 Question Paper Semester VI Electronics and Communication Engineering Microprocessors

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N
ro 6F,6052
() B. Tech. Vf-Sem. (M_uirr^ack) Exam.,
\0 April/UI ay_2016
tII Electronics & Communication B"si";ri"g
\0 6EC2A Microprocessors

Maximum Marks: g0
Min. Passing Marks (Main &Back):
Instracti.ons to Candidate s : _ 26

Attempt any five questions, selecting
one questian from each anit. Ail
Questions carry equal marks. schematic
diagrams must be shown
wherever necessary. Any data you
feel missing m(ty suitably be assumed
and stated clearly.
units of quantities used/ carcurated
must be stated crearry.
use of foltowing supporting material
is permitted during examination.
(Mentioned inform No. 205)
1. NIL

UNIT.I
Q' 1 (a) Explain the Architecture of 8085 microprocessor
in detail.
t8l
(b) why are ADz - AD6lines multiplexed?
- with the help of latching circuit explain
how these lines are demultiplexed.
t8I
OR
Q.t (a) Explain the Addressing modes of 8085
microprocessor with the help
of suitable
examples.
(b) Explain memory mapped VO Interfacing t8l
Technique.
t8l

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Q.2 (a) What are the Basic machine cycle in 8085 microprocessor? Explain the op - code
fetch machine cycle using timing diagram. tl0l
(b) Write a program to find 2's compliment of a number. t6l

OR

Q.2 (a) Explain different types of 8 - bit instructions of 8085 microprocessor, giving also
suitable examples. t8l

(b) Explain the term Machine Cycle, T - Sate and Instruction Cycle. I8l

UNIT.III
Q.3 (a) Explain the different types of 16 - bit Instructions of 8085 microprocessor,
giving also suitable examples. I8l

(b) Pack the two unpacked BCD number stored in memory location 2000 H and
2001 H and store the result in 2500 H. Assume that last digit is stored in

2001 H. t8l

OR

Q.3 (a) Write a program to shift 8 - bit data for 4 -bitright side without carry. Assume
that data is in Register C. t8l

(b) Explain different types of Instructions related to counter and Time delay with
examples. t8l

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UNIT.IV
Intemrpts' Draw the diagram
of
Q.4 (a) Distinguish between software and Hardware
l10l
intemrPt structure of 8085 MPU'
illustrate how to use them for
8085
(b) Explain the instructions SIM and RIM and t6l
intemrPts.
B
vectored and Non vectored Intemrpts? Also differentiate
Q.4 (a) what do you rnean by
intemrpts' lr21
between maskable and non maskable

(b)WritelnstructiontomaskRSTT.5andRST6.5intemrptsimultaneously.t4]
UNIT.V
t8l
Q.s (a) Drawthelnterfacingdiagramofs25TDMAandexplainitsoperations.
t8l
of a Block diagram'
(b) Explain 8255 PPI with the help

OR
t8l
of 8254 PIT with diagram'
Q.s (a) Explain different types of modes
t8l
modes of 8259 PIC with diagram'
(b) Explain the different types of

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