4-bit encoder
x0
x1
x1 + x3
x2
x3
one-hot
code
x2 + x3
x0 x1 x2 x3 y1 y0
1
0 0 0 0 0
0
1 0 0 0 1
0
0 1 0 1 0
0
0 0 1 1 1
y0
y1
unlisted combinations
are assumed
not to occur
binary
code