Forum Discussion

Honored Contributor

10 years ago

Phase Relationship after PLL reconfiguration in CycloneIV

Hi, I am using EP4CE55 FPGA in my project. i have problem with PLL usage. I have enabled reconfiguration and dynamic phase shift of PLL. i want to know after i reconfigure PLL to output a d...

Altera_Forum

Honored Contributor

10 years ago

iirc the phase relationship once you change the pll settings can differ from what you set in the megafunction but after holding the pll in reset it should be back to your phase settings. note only hold the pll in reset not the pll reconfig.

if you havent already, look at

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/an/an661.pdf

Forum Discussion

Phase Relationship after PLL reconfiguration in CycloneIV

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