New ContributorHello,
I'm reading datasheet for Cyclone 10GX (10CX105) and VCCIO absolute max is 4.10V while the recommended operation is 3.15V max. I'm having many other peripherals running 3.3V LVTTL/LVCMOS both inputs & outputs.
So is it OK to connect VCCIO to 3.3V?
Thank you.
Hello,
That will be safe. Is all your questions addressed? I will close this case if there is no update from you in 3 days.
Thank you.
Regular ContributorHello Lnguyen,
The answer is yes to your question because Vccio of 3.3V is complied with it's I/O Standard. While the absolute maximum value ratings for Vccio is 4.10V it is safer to set the Vccio near the recommended value. You can refer on Table 26 page 78 of this document to see the I/O Standards: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-10/c10lp-51003.pdf
Thank you.
New ContributorHello,
Thank you for sharing the document on 10LP, and I assume it would be same for 10GX. Yes, I'm using 10GX on my design and connect to multiple devices with 3.3V operation. The actual voltage can be from 3.27V to 3.34V. I just want to make sure not to damage device 10GX.
Thank you.
Regular ContributorHello,
That will be safe. Is all your questions addressed? I will close this case if there is no update from you in 3 days.
Thank you.
