Institute of Chartered Financial Analysts of India (ICFAI) University 2006 B.E DCS-II - Question Paper

Second-Term exam

Fifth Semester [B.Tech] - November 2006
Q1


( a )


What do you mean by delta delay?


1

( b )
What are generics? provide examples. 2
( c ) Differentiate ranging from constants and variables? 2
( d ) Write down a signal assignment statement (using the concatenation operator &) that creates a rotate right operation by seven bit positions on the subsequent signal:
SIGNAL m : std_logic_vector(12 downto 0); 2
( e ) What is the main function performed by OLMC's? 3

Q2


( a )


elaborate signal drivers? What is the effect of transport delay and inertial delay on the signal drivers?


6

( b )


elaborate the kinds of object declarations used in VHDL?
4

Q3


( a )
Given the subsequent entity declaration of a 2-to-4 decoder with an enable signal

ENTITY decoder IS
PORT(a, b, g: IN std_logic;
y: OUT std_logic_vector(3 DOWNTO 0));
END decoder;

Write down 2 architecture descriptions using

1. a opted signal assignment
2. a conditional signal assignment

4

( b )
What is the general expression for case statement? 2
( c ) Implement BCD to gray code converter using PLA? 4

Q4


Write short notes on :

10

( a )
DRAM interfacing

( b )
Sequential PLD's

( c )
Configuration specification

( d ) VHDL simulation phases

Earning:   Approval pending.