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Altera_Forum
Honored Contributor
Honored ContributorCyclone II: PLL
From the device datasheet Cyclone II has 4 PLL, and I need to generate four 250MHz clocks with 0 degree, 90 degree, 180 degree and 270 degree phase shift. The input clock is 50MHz. But the altpll fun...
Altera_ForumHonored Contributor
Honored ContributorStrictly NO !, you can't "shift 180°" with NOT gate because gates introduce a delay, so 180° is NOT guaranteed by this way.
