Karnough Map Sum Of Minterms Representation

Thread Starter

bellatrix

Joined Mar 27, 2018
11
Σm(0,1,2,7)+Σd(4,8) How to show this expression in a Karnough map? What does the second sum(Σd) mean? Is that d mean dont care or something different?
 

WBahn

Joined Mar 31, 2012
24,974
Σm(0,1,2,7)+Σd(4,8) How to show this expression in a Karnough map? What does the second sum(Σd) mean? Is that d mean dont care or something different?
I've never seen the notation, but "don't care" would seem to be a very good likelihood.
 

WBahn

Joined Mar 31, 2012
24,974
I have seen an expression as Σm(0,1,2,7)+Σd(1,8). What to do with m1? Both minterm and dont care?
It's probably a typo, so if possible ask for clarification. If that's not possible, since it's both the safest thing to do is treat is as a required minterm. Of course, if the solution assumes it's really a don't care, then you might get marked wrong -- but you've got a really strong case to challenge it.
 

Thread Starter

bellatrix

Joined Mar 27, 2018
11
It's probably a typo, so if possible ask for clarification. If that's not possible, since it's both the safest thing to do is treat is as a required minterm. Of course, if the solution assumes it's really a don't care, then you might get marked wrong -- but you've got a really strong case to challenge it.
It was a question of an exam.. Thanks for help
 
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