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problem 1:

a) Tabulate the truth table for an 8 x 4 ROM that implements the following 4 Boolean functions:

i) A (x,y,z) = ∑ (1,2,4,6)

ii) C (x,y,z) = ∑ (2,6)

iii) B (x,y,z) = ∑ (0,1,6,7)

iv) D (x,y,z) = ∑ (1,2,3,5,7)
 
b) Given a 32 x 8 ROM chip with an enable input, show the external connections necessary to construct a 128 x 8 ROM with 4 chips & a decoder.(L35)

c) Implement the following function using ROM.

f (a, b, c, d) = Pm (0, 1, 3, 5, 7)

problem 2:

a) Derive the PLA programming table for the combinational circuit that squares a 3-bit number. Minimize the number of product terms.
 
b) List of PLA programming table for the BCD –to-excess-3 code converter
 
c) What are the differences between PLA and PAL.
 
problem 3:

a) Implement the following function using ROM.

f(a, b, c) = ∑ m (0, 1, 2)
 
b) Draw a typical RAM cell.
 
c) What is the difference between PROM and EPROM.
 
d) What is the basic architecture of PLA?

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M93455

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