I have to implement a Moore machine that has an input L and an output Z.
The input line
L provides values of
0 as input, in a random order.
The output line Z takes the value
1 whenever two values of
0 and two values of
1 have been detected in the input, no matter the order.
For example the sequences
0011, 00001001 and
1010 would all set line Z to
I have to use D flip-flops and NAND gates only but am stuck halfway.
So far I have drawn the state diagram and the table below: (CS stands for current state and FS stands for future state).
I know that I must draw 8 Karnaugh maps I think but I am not sure and I have to use 3 or 4 flip flops.
Could you point me in the right direction?
EDIT After some more research I managed to finally draw the Karnaugh maps and extract the functions, and I designed a circuit using LogiSim. I am not sure what I have done wrong and have no idea how to proceed. The circuit is not doing what it's supposed to do. Here is a link to my LogiSim circuit.