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Altera_Forum
Honored Contributor
Honored Contributorsynchronize pll
On CycloneII, is it possible to re-synchronize or start a pll on an async event such as a pulse? I have a 50Mhz pll clocked state machine that is triggered from a single external async pulse. I...
Altera_ForumHonored Contributor
Honored ContributorI wrote up some verilog for this (12ff,3gates) and the functional simulation looks perfect, but the timing simulation does not show correct values for one of my shift registers. I see in the altddio doc that there are special ddr register cells, and special sim libs also. I'd prefer to stick with my own code, but without knowing how to specify those special options I guess I will have to use the megafunction.
