///------ en3 en4
6'b000000 0   0
6'b000001 0   0
6'b000010 0   0
6'b000011 0   0
6'b000100 1   0
6'b000101 0   0
6'b000110 0   0
6'b000111 0   0
6'b001100 1   1
6'b001101 0   0
6'b001110 1   0
6'b001111 0   0
6'b011100 0   1
6'b011101 0   0
6'b011110 1   1
6'b011111 1   0
6'b111100 0   0
6'b111101 0   0
6'b111110 1   1
6'b111111 1   1