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Altera_Forum
Honored Contributor
Honored ContributorQuestion about sync/async reset and recovery/removal
I understand most of the recommendation when implementing reset scheme is using asynchronous assertion and synchronous deassertion. My question is why do we need sync deassertion given that it is alr...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- Thanks for the explanation. So in summary, synchronous de-assertion is not really necessary for Altera's devices since it has already been taken care in rec/rem. Only those that do not have async reset port will benefit from it. Do correct me if my understanding is incorrect. --- Quote End --- wrong. That is what you did by having double synchrinoser. The reset is termed synchronised (or what I call pre-synchronised and applied either way). I think you assume the case of wiring to async port as async, well it is locally but the incoming signal is pre-synchronised so that it doesn't de-assert anytime at will by controlled by clock edge.
