Digital Systems Design Dec 2002

566 B. E. (Computer Science Engineering) VIth Semester

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Examination, December-2002 DIGITAL SYSTEM DESIGN Paper-CSE-308-C Time allowed: 3 hours

Maximum Marks: 100

Note: Attempt any five of thefollowing. 1.

Determine the state diagram corresponding to the following state table. Find out the minimal state table and draw the state diagram so obtained. Input

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PS

x=o

x=l

a

f,O

b,O

b

d,O

c,O

c

f,O

e,O

g, 1

a,O

d,O

c,O

f, 1

b, 1

g,O

h, 1

g, 1

a,O

d e f g h

I I I

Ns,Z 2.

20

Write down the state table and state diagram for (a) D-flip flop (b) T-flip flop (c) J-K flip flop (d) S-R flip flop.

566-1,300-P2-(Q-8)

20 P.T.G.

(2)

3. (a) What are generics? Show with an example, how a , .. component can be made more general usrng genencs. Show with an example. 5 (b) What are sequential statements? Write down its syntax. Discuss process and wait statements. How are sequential statements different from concurrent statements ? (c) Write a short note on package and library.

10 5

4. (a) Write down the truth table; working of a 4 x J multiplexer along with its diagram. Implement 4 x 1

I,

multiplexer in VHDL (data flow architecture). (b) Write down the structural architecture of a 4 bit

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5. What are basic components of a computer. Write down the code for memory or input / output subsystem. 20

6.

10 comparator. Write down the VHDL code for ALU and describe its working. Briefly explain the function of control unit. 20

7.

8.

Design a BCD-to-excess-3 code convertor using PLA and PAL.

20

Write short notes on the following: (a) Conditional statements (b) Case statements (c) Arrays and loops (d) Structural Modelling.

566-1,300

20

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