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Altera_Forum's avatar
Altera_Forum
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12 years ago

combinational loops as latches

I got a warning: TimeQuest Timing Analyzer is analyzing 24 combinational loops as latches. I was told this was caused by incomplete output changes corresponding to the input changes. That is, some in...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I think u got value to the comb logic which feedback to its input, this ia bad design, because timing analyzer cannot analyze the comb logic path properly. If the loopback is not latency sensitive, try to register the output value before you loop back