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MinzhiWang's avatar
MinzhiWang
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Physical location constrain issue for Cyclone 10 GX ALM

Hello Guys, Several carry chains are realized in my project, the device is 10CX220YF780E5. Every carry element will drive register. There isn't issue when the carry just driver single register or d...
Hdl
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
1 year ago

How are you constraining this? Remove your constraints and let the Fitter place as needed.

If you're concerned about timing, tighten your constraints in your .sdc instead of trying to force placement of resources.

MinzhiWang's avatar
MinzhiWang
Icon for Occasional Contributor rankOccasional Contributor
1 year ago

Hi sstrell,

No, I have to constrain as that. Why cannot I constrain as that? I just want to use all 4 registers of this single ALM, then the ALUT can drives these register shortly and consistently. That's what my project requires.

Thanks