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Altera_Forum's avatar
Altera_Forum
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12 years ago

very simple PLL usage issue

Hello, I'm working on a custom pcb with a cyclone V GX. I'm having issues getting an output from the altera megafunction PLL, it is unresponsive. My test design has a nios II which succe...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Yes, I have. It is low showing low and that it is not locked. I just cant seem to figure out why it wouldn't lock if my clock line seems fine.

Are there any other PLL debugging techniques I could try?

Thanks again.