Problem

(Word Problem) Consider the following logic unit. It has three operation inputs (A, B, C),...

(Word Problem) Consider the following logic unit. It has three operation inputs (A, B, C), two data inputs (D1, D0), and a single output (Z). The logic unit is defined as follows: when ABC = 000, Z = 0; ABC = 001, Z = D0; ABC = 010, Z = D1 AND D0; ABC = 011, Z = D1 NAND D0; ABC = 100, Z = D1 NOR D0; ABC = 101, Z = D1 OR D0; ABC = 110, Z = D1; ABC = 111, Z = 1.

(a) Implement to obtain a minimized implementation using the K-map method [Note: This uses 5 variables!).


(b) Implement using a 16:1 MUX (use A,B,C,D1 as your MUX control inputs).


(c) Implement using an 8:1 MUX plus whatever additional gate logic you need (use A,B,C as your MUX control inputs).


(d) Which implementation is “best”? Why?

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Solutions For Problems in Chapter 5