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Binary Coded Decimal (BCD) weighted 7-4-2-1 code. V is a validity bit that =1 when the...

Binary Coded Decimal (BCD) weighted 7-4-2-1 code. V is a validity bit that =1 when the input code is valid, assume invalid codes can be treated as “don’t care” conditions for W,X,Y and Z. Fill in the truth table for this design A,B,C,D will be the input BCD code and W,X,Y,Z will be the output code.

Is this correct?

Decimal equivalent

Inputs (BCD)

(MSB -> LSB)

Outputs (7421)

(MSB -> LSB)

A   B   C   D

W

X

Y

Z

V

0

0    0    0    0

0

0

0

0

1

1

0    0    0    1

0

0

0

1

1

2

0    0    1    0

0

0

1

0

1

3

0    0    1    1

0

0

1

1

1

4

0    1    0    0

0

1

0

0

1

5

0    1    0    1

0

1

0

1

1

6

0    1    1    0

0

1

1

0

1

7

0    1    1    1

0

1

1

1

1

8

1    0    0    0

1

0

0

1

1

9

1    0    0    1

1

0

1

0

1

10

1    0    1    0

x

x

x

x

0

11

1    0    1    1

x

x

x

x

0

12

1    1    0    0

x

x

x

x

0

13

1    1    0    1

x

x

x

x

0

14

1    1    1    0

x

x

x

x

0

15

1    1    1    1

x

x

x

x

0
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Answer #1

It is mentioned in the question to verify whether the given truth table is correct or not. So I didn't find expression for w x y z and v.

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