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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 ContributorThe DDIO megafunction could be used along with a small state machine to generate a 10MHz clock off the 50MHz clock. tco of the DDIO is very small and an indicator of the rising edge of the 10MHz generated clock could be used in the 50MHz domain. This would allow the 50Mhz domain to know the phase of the 10MHz domain generated by the DDIO. All logic would stay in the 50Mhz domain.
