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Honored Contributor
Honored Contributorpll_lock does not lock but the pll works
Hello, If i'm not wrong pll_lock works by positive logic, so i have this problem: My PLL Works but doesn't lock, anyone knows why? http://i46.tinypic.com/11lshsg.jpg As you can see CLO...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- As said, the PLL model is simulating some locking delay (in a 10 µs range, if I remember right). --- Quote End --- Ok, sorry, my time period is 40 ns so it should lock in about 300 clocks, my window of 10 clocks is clearly insufficient, that may be a reason. --- Quote Start --- Finally, PLL simulation doesn't work with default ns Modelsim timescale, it has to be changed to ps. --- Quote End --- Why more precision?, Thank you.
