Hi all,
Have a quick question to make sure I am doing this correctly. I have to take a 4-bit truth table that has 7-bit outcomes and then construct the logic circuit solely made out of ONLY 7 8-to-1 muxes, and 1 inverter.
Here is my truth table for the following logic circuit:
I used this truth table for a similiar problem and I looked at each of the 7 outputs (these correspond with a 7-segment display) and looked at all of the Maxterms:
CA = Summation M(1,4,B,D)
and so on.
I know there is a way that I can take this truth table and try and minimize it down to a 3 variable and have my output either be a 1, 0, or variation of the 4th input I have gotten rid of (in this case it will be D).
Now I have to use 7 8x1 muxes in this design, so what I have going so far is this:
http://i.imgur.com/JXVZM3y.png
I would have 7 of these - each corresponding to the 7 segments of the display. Now what I am having a difficulty seeing is how I will know what to put in as inputs. Would I continue on the path I am going on right now and look at the outputs from my previous set up? Or am I going in the complete wrong direction? Any advice would be greatly appreciated.
Have a quick question to make sure I am doing this correctly. I have to take a 4-bit truth table that has 7-bit outcomes and then construct the logic circuit solely made out of ONLY 7 8-to-1 muxes, and 1 inverter.
Here is my truth table for the following logic circuit:
Rich (BB code):
A B C D V CA CB CC CD CE CF CG
0 0 0 0 0 1 1 1 1 1 1 0
0 0 0 1 1 0 1 1 0 0 0 0
0 0 1 0 2 1 1 0 1 1 0 1
0 0 1 1 3 1 1 1 1 0 0 1
0 1 0 0 4 0 1 1 0 0 1 1
0 1 0 1 5 1 0 1 1 0 1 1
0 1 1 0 6 1 0 1 1 1 1 1
0 1 1 1 7 1 1 1 0 0 0 0
1 0 0 0 8 1 1 1 1 1 1 1
1 0 0 1 9 1 1 1 1 0 1 1
1 0 1 0 A 1 1 1 0 1 1 1
1 0 1 1 B 0 0 1 1 1 1 1
1 1 0 0 C 1 0 0 1 1 1 0
1 1 0 1 D 0 1 1 1 1 0 1
1 1 1 0 E 1 0 0 1 1 1 1
1 1 1 1 F 1 0 0 0 1 1 1
CA = Summation M(1,4,B,D)
and so on.
I know there is a way that I can take this truth table and try and minimize it down to a 3 variable and have my output either be a 1, 0, or variation of the 4th input I have gotten rid of (in this case it will be D).
Now I have to use 7 8x1 muxes in this design, so what I have going so far is this:
http://i.imgur.com/JXVZM3y.png
I would have 7 of these - each corresponding to the 7 segments of the display. Now what I am having a difficulty seeing is how I will know what to put in as inputs. Would I continue on the path I am going on right now and look at the outputs from my previous set up? Or am I going in the complete wrong direction? Any advice would be greatly appreciated.