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Altera_Forum
Honored Contributor
Honored ContributorPLL usage
Hello all, I've noticed that many use PLL on the reference clock input even if they do not need to divide/multiply/shift this clock or do not have external clock to synchronize to the reference fr...
Altera_ForumHonored Contributor
Honored Contributorthe PLL helps balance setup and hold timing to meet i/o constraints which explains using it with a 1:1 ratio:
http://www.altera.com/literature/wp/wp_stxtco.pdf
