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Altera_Forum
Honored Contributor
14 years agoAre outputs of PLL related all the time?
Hi, Currently, i am timing constraining my FPGA design. I would like to know are the outputs of PLL related with each other (sync) all the time? 1)What if the output frequency is multiple...
Altera_Forum
Honored Contributor
14 years ago --- Quote Start --- 1)What if the output frequency is multiple of the input frequency ? --- Quote End --- the slow clock will always align edge with fast clock(in sync) as long as they are phase aligned --- Quote Start --- 2)What if the output frequency is NOT multiple of the input frequency --- Quote End --- slow clock cannot align at every edge (Out of sync) --- Quote Start --- 3)What if the output frequency is phase shifted of the input frequency --- Quote End --- never edge aligned but fixed relation(related but not in sync) --- Quote Start --- 4)What if the output frequency is phase shifted and multiple/non-multiple of the input frequency --- Quote End --- never edge aligned(related but not in sync) / neither