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AEsqu's avatar
AEsqu
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6 years ago

huge delay inserted by Quartus 19.3 pro on the Arria 10 FPGA

Hello, I see a huge delay inserted by Quartus 19.3 pro on the Arria 10 FPGA. This was not seen in the stratix III FPGA using quartus 13.1. I will attach the picture showing this. This lead to hug...
AEsqu's avatar
AEsqu
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6 years ago

Nor the Statix 3 nor arria 10 handbooks show's aset in the ALM:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/stx3/stratix3_handbook.pdf

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/arria-10/a10_handbook.pdf

but the quartus rtl viewer shows it in the RTL viewer (so it must be a combination of the FF and logic around from the ALM).

This is not the case for the arria 10 (simple FF).

I'm attaching an RTL view in quartus 13.1 with the stratix 3 vqm from synplify pro P-2019.09-SP1 (async inputs are indicated).

The flops using the vqm from synplify pro is present in the RTL viewer of Quartus 19.3 for the arria 10 and without async inputs.