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age N o ... 1 E c r r E 6 D 1USN ~~~~~ __~~~~~~
S i x t h S e m e s t e r B .E . D eg r e e E x a m i n a t i o
n , J an u ar y /F e b r u a r y 2 0 0 5E l e c t r o n i c s &
C o m m u n i c a t i o n I T el e c o m m u n i c at i o n E n g
in ee r in g
VHDLe: 3 hrs.] [Max.Marks: 100
Note: Answ er a ny F IVE fu ll que stio ns.1. (a) Explain the
following with a suitable example for each :
i) E vent schedulingii) Concurrent signal assignment! statement
concurrencyiii) Guarded block statement. (4 x 3=12 M arks)
(b) E xplain the concept o f behaviora l description and
structural description using half-adderas an example. (8 M
arks)
2. (a) Describe the concept of inertia l delay and transport
delay. Develop a VHDL code for abuffer using inertial delay model
and transport delay model. (10 Marks)
(b) Write VHDL coding for a T flip-flop using P ROCESS with a
sensitivity list. Include anassertion statement in your model,
which expresses the requirement that 'a flip-flop's twooutputs Q
and Qb of the type S td-Iogic are complementary.
(10 Marks)
3. (a) Write a VHDL behavioral model of a 4-bit counter with
asynchronous reset and presetfac ilities . (10 Marks )
(b) E xplain the following sequential s tatements a long with
BNF and give an example for each:i) CASE ii) WAIT (6 M arks)
(C ) Bring out the differences between signa l ass ignment and
variable ass ignment. (4 M arks)4. (a) E xplain the following data
types with suitable example:
i) Enumerated type ii) P hysical type (6 Marks)(b) Indicate the
significance of A RRA Y type declaration. W rite V HDL code for
modelling a
ROM of capacity 8 x 4 bits. (10 Marks )(C ) Wrrte a R E CORD
type of declaration for a test stimulus record containing a
stimulus bit
vector of 3-bits, a delay value and an expected response brt
vector of 8-bits. . (4 Marks)5. (a) Bring out the differences
between functions and procedures . G ive the genera l format
for
subprogram dec laration and the corresponding calling statement.
(8 Marks )COntd .... 2
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Page No... 2 E C f T E 6 D 1(b) Write a complete VHDL code to
perform the following operation: use a function to convert
the input array to integer, determining the maximum of three
numbers in integer andoutputting the value in array using functions
and packages. (12 Marks)
6 . (a) Define the resolution function. Discuss' in deta il the
reso lution function for a four va luesystem. (10 Marks)(b) Explain
the different types of configuration statements with suitable
examples . (10 Marks)
7 . (a) E xplain the following with respect to synthesis i) R TL
iQ Constraints (10 Marks)(b) E xplain the various steps involved in
the convers ion of RTL description to gate level net
list. (10 Marks )8 . (a) Write a VHDL program for a 4-bit
shifter using sequential statements. The shifter is to beprovided
with a facility of loading arid shifting to right or left by one
bit at a time. (10 Marks)
(b) Discuss in brief:i) P ackage declaration and package bodyii)
Generics .
(6 Marks)(4 Marks)
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Page No ... 1 E C 6 T 3USN ~~~- - ~~~- - ~~~- - ~
S i x th S e m e s t e r B .E . D eg r e e E x am i n a t i o n
, J an u ar y /F e b ru ar y 2 0 0 5. . . .E l ec t r o n i c s an
d C o m m un ic -at io n E ng in eer in gAdvanced Microprocessor-
and Mlcrocontrollers_
Time: 3hrs.]N o t e : A n sw er an y F IVE f u ll q ues ti o n s
.
1. (a) Explain the internal architecture of 8086 with the 'help
ot a neat block diagram and givethe functions of all the blocks .
(10 Marks)
[Max.Marks : 100
(b) G ive three reasons for the 8086 processor being faster as
compared to its predecessors.(6 Marks)(c) Categorize the following
instructions in appropriate addressing rrodes:
i) MOV A X , 1234h ii) MOV CX, [2000h] iii) IN A X , [OX] iv) A
A A (4 Marks)2. (a) What are string instructions ? How do they help
in reducing the number of instructionsused in a program ? (10
Marks)
(b) Write an Assembly Language P rogram to generate the first N
primary numbers and displaythe same on the Display. Explanatory
comments must be present in your program.(10 Marks)3 . (a) What is
the operation being performed when the following instructions are
executed.
i) XLAT ii) LDSBX,[DI] iii) AAD iv) DAS (12 Marks)(b)
Differentiate between the following instructions and IC pins which
have the same name.
i) LOCK ii) TEST (8 Marks)4. (a) Write explanatory notes on the
Interrupt P rocess in 8086/88. (12 M arks)
(b) What are the interrupt vector addresses of the following
interrupts in the 8086 InterruptVector Table ?i) INTO ii) NMI iii)
INT 20H iv) INT 30 H (8 Marks)
5 . (a) G ive the interconnections between the processors 8086
& 8087 numeric co-processorand explain the sequence of
operations while control is passed on from one processor toanother.
(10 Marks)(b) Write an assembly language program with numeric
co-processor instructions along withregular instructions, to find
the third s ide of a right - angled triangle, given the two
othersides. (6 Marks)(C ) Convert (2408.1951 ho into i) 64 bit Long
real format and iO 80 bit temporary real format.Write in HEX
format. (4 Marks)
6 . (a) Explain the following architectures and bring out their
salient features.i) Harvard Vs Princetonii) C IS C Vs R IS C (10
Marks)
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Page No... 2(c) How does a Microprocessor differ from a micro -
controller?
7. (a) What are the addressing modes used in,8051 ? G ive one
example each.(b) E xplain with J neat block diagram the working of
8051 micro-controller.(c) What are special function registers?
..8. (a) E xplain the following instructions with respect to
8051 instruction set.i) J .I0VC A, @A +DPTRii) XCIID A, @RIiii) .
DIVAniv) AJ kIP saddv) CJNEA, add, radd
E C 6 T 3(5 Marks)(8 M arks)
(10 Marks)(2 Marks)
(10 Marks;(b) W rite a program to divide tho data in nAM
locations 3Eh by the number 12h. P uttho quotient in R1 a n d
remainder in R5 in the current register bank. G ive
explanatorycomments. (10 Marks)
** * **
