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Q3) (10 points] Tabulate the truth table of an 8x4 ROM that implements the following functions: F. (A,B,C) = AB + AC F1 (A,B
0 0
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Answer #1

F0 = A’B + AC’

F1 = A’B’C’ + C

F2 = A’B’ + AB

F3 = AB + AC + BC

Address
A B C

F0

F1

F2

F3

0 0 0

0

1

1

0

0 0 1

0

1

1

0

0 1 0

1

0

0

0

0 1 1

1

1

0

1

1 0 0

1

0

0

0

1 0 1

0

1

0

1

1 1 0

1

0

1

1

1 1 1

0

1

1

1

F0: A’B + AC’

0 0 0: 1.0 + 0.1 = 0

0 0 1: 1.0 + 0.0 = 0

0 1 0: 1.1 + 0.1 = 1

0 1 1: 1.1 + 0.0 = 1

1 0 0: 0.0 + 1.1 = 1

1 0 1: 0.0 + 1.0 = 0

1 1 0: 0.1 + 1.1 = 1

1 1 1: 0.1 + 1.0 = 0

F1: A’B’C’ + C

0 0 0: 1.1.1 + 0 = 1

0 0 1: 1.1.0 + 1 = 1

0 1 0: 1.0.1 + 0 = 0

0 1 1: 1.0.0 + 1 = 1

1 0 0: 0.1.1 + 0 = 0

1 0 1: 0.1.0 + 1 = 1

1 1 0: 0.0.1 + 0 = 0

1 1 1: 0.0.0 + 1 = 1

F2 : A’B’ + AB

0 0 0: 1.1 + 0.0 = 1

0 0 1: 1.1 + 0.0 = 1

0 1 0: 1.0 + 0.1 = 0

0 1 1: 1.0 + 0.1 = 0

1 0 0: 0.1 + 1.0 = 0

1 0 1: 0.1 + 1.0 = 0

1 1 0: 0.0 + 1.1 = 1

1 1 1: 0.0 + 1.1 = 1

F3: AB + AC + BC

0 0 0: 0.0 + 0.0 + 0.0 = 0

0 0 1: 0.0 + 0.1 + 0.1 = 0

0 1 0: 0.1 + 0.0 + 1.0 = 0

0 1 1: 0.1 + 0.1 + 1.1 = 1

1 0 0: 1.0 + 1.0 + 0.0 = 0

1 0 1: 1.0 + 1.1 + 0.1 = 1

1 1 0: 1.1 + 1.0 + 1.0 = 1

1 1 1: 1.1 + 1.1 +1.1 = 1

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