Truth Table: Help !

[marco.marsella]

Hello,

I have to implement a truth table (very easy...)

...but in the definition of the table there are some "don't care" bits...

Let's say for example that the table is so defined:

IN----------OUT
"000" -- "111000"
"001" -- "000111"
"010" -- "11--11"
...... and so on....

What I need is that the minimun number of output bits toggle,
so that the output for input "010" is:
"110111" when the previous input was "001" and
"111011" when the previous input was "000".

Any idea ???

Thanks in advance and regards,
Marco

 

[jeppe]

This can't be done with a truth table - I would say you need a State Diagram instead.

Jeppe

 

[JohnDuq]

Instead of a three-bit truth table with just the present input, how about a six-bit truth table with both the previous input and the present input?