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Digital Logic Circuits                              18

                        IMPLEMENTATIO
                            - Don’t-Care

In some logic circuits, the output r
for some input conditions are don’
whether they are 1 or 0.

In K-maps, don’t-care conditions a
by d’s in the corresponding cells.

Don’t-care conditions are useful in
the logic functions using K-map.

   - Can be considered either 1 or 0
   - Thus increases the chances of

     --> Reduce the number of varia

                                            y

                                 1dd 1

                            x d1
                                        z

                        x

                        y
                        z

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