Honored Contributor
Honored ContributorYes, you can connect 'VCC_ONE' to 3.3V. See table 6: 'power supplies recommended operating conditions for max 10 single supply devices' on page 4 of the max 10 fpga device datasheet (https://www.altera.com/en_us/pdfs/literature/hb/max-10/m10_datasheet.pdf).
However, there appears to be a bug in Quartus' reporting (Q14.1 that I'm using). That may well still be the case in newer versions... In Quartus (with your project open) from the 'Assignments' menu, open 'Settings...'. Select 'Voltage' from the 'Operating Settings and Conditions' section in the Category menu. Change the 'VDDA voltage' setting to '3.3V'. The report files will now state that VCCA should be connected to 3.3V. However, it still reports VCC_ONE needs connecting to 3.0V. Now look at the note below table 6 of the above document: --- Quote Start --- (1) VCCA must be connected to VCC_ONE through a filter. --- Quote End --- VCCA @ 3.3V and VCC_ONE @ 3.0V are clearly not intended. Hence, my belief there is a bug. If you're using Q15.0 I'd be interested to hear if this is still the case. Cheers, Alex
