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Honored Contributor
Honored ContributorCyclone II PLL - without wizard
Hi,
I am trying to use the PLL blocks in a Cyclone II outside the limits of the megafunction wizard. I've pushed the VCO far outside the range by lying to it, and would like to access the phase comparator directly so that I can run the input much slower. Any takers on this one? Thanks, David.4 Replies
Altera_ForumDrivers for what? This component is a FPGA, it doesn't have any driver. What are you trying to do?
- Altera_Forum
does any body know where to download the drivers for the cyclone ii ep2c35f672c8n please let me know:oops:
- Altera_Forum--- Quote Start --- so that I can run the input much slower. --- Quote End --- Sounds like a bad idea. The frequency limits aren't set by arbitrary restrictions of the MegaWizard rather than the physical limitations of the VCO and the PLL filter. Ignoring it must be expected to result in bad performance and possibly unstable PLL operation.
- Altera_Forum--- Quote Start --- I am trying to use the PLL blocks in a Cyclone II outside the limits of the megafunction wizard. I've pushed the VCO far outside the range by lying to it, and would like to access the phase comparator directly so that I can run the input much slower. --- Quote End --- Have you looked at the ALTPLL_RECONFIG Megacore? http://www.altera.com/literature/ug/ug_altpll_reconfig.pdf Cheers, Dave
