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Truth Table: Help !

 
 
marco.marsella marco.marsella is offline
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Join Date: Mar 2010
Posts: 3
 
      03-03-2010
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
 
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jeppe jeppe is offline
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Join Date: Mar 2008
Location: Denmark
Posts: 348
 
      03-03-2010
This can't be done with a truth table - I would say you need a State Diagram instead.

Jeppe
 
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JohnDuq JohnDuq is offline
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Join Date: Dec 2008
Posts: 88
 
      03-05-2010
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?
 
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