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In the following truth table, $V = 1$ if and only if the input is valid.
 

Inputs Outputs
$D_0$ $D_1$ $D_2$ $D_3$ $X_0$ $X_1$ $V$
$0$ $0$ $0$ $0$ $x$ $x$ $0$
$1$ $0$ $0$ $0$ $0$ $0$ $1$
$x$ $1$ $0$ $0$ $0$ $1$ $1$
$x$ $x$ $1$ $0$ $1$ $0$ $1$
$x$ $x$ $x$ $1$ $1$ $1$ $1$


What function does the truth table represent?

  1. Priority encoder    
  2. Decoder    
  3. Multiplexer    
  4. Demultiplexer
asked in Digital Logic by Veteran (346k points)
retagged by | 1.1k views

3 Answers

+20 votes
Best answer
answered by Loyal (4.2k points)
selected by
what is significance of don't care here in priority encoder.

To Give priority to Di+1 over Di

+7 votes

....

answered by Veteran (17k points)
–6 votes
ans b)
answered by Boss (5.1k points)
Ans should b A


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