Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Unsafe Latch behavior and inferred latches

Hey Everyone, I am a little confused on how Quartus decides if something is an actual latch or an inferred latch. For example in the following code, latch_counter and control_word_register are ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Hello.

I forgot to assign all the cases in a case control in a always @(*), so latches are inferred.

OK, I understand that, no problem.

But, with the inferred latches present I get both LE count and fmax 10% better than with the inferred latches eliminated.

Is the TimeQuest timing analyzer to believe in this case?