Gate Logic: Two-Level Simplification
K-map Example: Don't Cares
F(A,B,C,D) = ?m(1,3,5,7,9) + ?d(6,12,13)
F = A'D + B' C' D w/o don't cares
F = C' D + A' D w/ don't cares
Don't Cares can be treated as 1's or 0's if it is advantageous to do so
By treating this DC as a "1", a 2-cube
can be formed rather than one 0-cube
In PoS form: F = D (A' + C')