444
Digital Electronics
Table 11.11 Example 11.8.
Present state
Next state
Inputs
C
B
A
C
B
A
X 1 (A)
X 2 (A)
X 1 (B)
X 2 (B)
X 1 (C)
X 2 (C)
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
1
X
1
0
1
0
0
0
1
0
1
1
0
0
0
X
1
0
1
0
1
1
1
0
1
X
1
1
X
0
1
1
0
0
1
1
0
0
0
0
1
X
1
1
0
1
1
1
0
1
X
0
1
X
1
1
1
0
0
0
0
0
0
1
X
1
X
1
1
1
1
1
0
1
X
X
1
X
1
X = don’t care condition.
A
BC
X
A
BC
BC
BC
(a)
1
1
X
A
BC
X
A
BC
BC
BC
1
1
X
1
A
BC
1
A
BC
BC
BC
(c)
1
X
A
BC
X
A
BC
BC
BC
(d)
1
1
1
1
X
1
(b)
A
BC
A
BC
BC
BC
(e)
1
X
X
X
A
BC
X
A
BC
BC
BC
(f)
1
1
1
1
1
X
Figure 11.28 Karnaugh maps (example 11.8).