Download AKTU B-Tech 5th Sem 2015-2016 Microprocessors Eec 503 Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 5th Semester (Fifth Semester) 2015-2016 Microprocessors Eec 503 Question Paper

Printed Pages : 4 49 EEC503 ?
(Following Paper ID and Roll No. to be filled in your
Answer Book)
Roll No.
73mm!
(SEM. V) THEORY EXAMINATION, 2015-16
MICROPROCESSORS _
[Time : 3 hours] [MaximumMarks : 100]
Note : The Question Paper contain three Sections.
Section-A ,
Q.1 Attempt all parts of the following. All parts carry equal
marks. Write answer of each part in short. .
(2 X 10=20)
(a) List the functions of ALE and 10m 'of 8085
microprocessor.
(b) Calculate the number of memory chips needed to
design 8K-Byte memory if the memory chip size
is 1024><1.
(c) List the addressing modes of 8085 with example.
14600 (1) P.T.O.

(d) Explain what operation is performed by each of
the instruction that follows:
V (i) STAXB
4600
(ii) LHLD 2000
(e) What is the output at PORT] when_ following
instructions are executed?
MVI A, 8FH
ADI 72H
J C DISPLAY
OUT PORTl
. HLT
DISPLAY : XRA A
OUT PORTl
HLT
? a?~u~'?\....12.. -..,- _
(f) Write a program using the ADI instruction to add
the two hexadecimal numbers 3AH and 48H and
to display the answer at the output port-port 1.
(g) Explain the role oftwo DMA signals in 8085.
(2) EEC503
(h) Draw the control word format for different modes
of 8225.
(i) Explain the role of program Counter in 8085.
(j) Explain the Flag register of 8086 microprocessor.
Section-B
V Attempt any ?ve of the following : . (5X10=50)
Q2. A
Q3.
Q4.
?Q5.
Draw and Explain the architecture of 8085.
Explain Data transfer instructions of 8085 in detail.
Explain the Interrupts of 8085.
A set of three packed BCD numbers are stored in memory
location starting at XXSOH. The seven segment codes
of digits 0 to 9 for common cathode LED are stored in
memory location starting at XX70H and output buffer
, is reserved at XX90H.
WAP & two subroutines called UNPAK and
LEDCOD to unpack BCD numbers and select an
appropriate 'seven segment code for each digit. The code
should be stored in output buffermemory.
Q6. Explain various functions performed by microprocessor.
14600 (3) P.T.O.

Q7.
Write a program to count continuoulyin hexadecimal
from FFH to 00H in a system with a 0.5 ,u s clock period.
. Use register C to set a one ms delay between each count
Q8.
3Q9
and display the no. at one of the output ports.
WAP to convert the content of 5 memory locations
starting from 2000H into ASCII character. Place the
result in ?ve memory locations starting from 2200H.
What do you mean by DMA? Explain its modes
Section-C
Attempt any two questions from this section. (15X2=30)
Q10.
Q11.
Q12.
Draw and explain the architecture of 8086. Also, explain
the concept of physical address generation.
Explain the block diagram of 8259 and also draw a neat ?.
interfacing diagram.
Explain the logic devices for interfacing. Design a ?
microprocessor system for 8085 MPU such that it.
should contain 4K byte of EPROM and 2K byte: ofRAM
using two 2K byte EPROM and two 1K byte RAM. Draw
the complete interfacing diagram. /
14600 . (4) EEC503