Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Potential Quartus Fitter Issue with Mixed Voltage Pins on Cyclone V

I am working on a Cyclone V design that is utilizing most of the pin resources. In my first pass, I let the fitter automatically assign pins. The issue that kept coming up is that, if not miti...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Pete,

Thanks!

Unfortunately, the latter scenario is the case, and while I've minimized the occurrence of mixed voltage I/O on a single bank, I don't have enough room to eliminate it completely.

I actually don't think the datasheet is in error. As you mentioned, with VCCIO=2.5V it can take up to 3.6V, but it is not preferred practice. I have conformed to Table 5-10 even though Quartus doesn't enforce it.

I will check with Altera, and post back on this. Thanks again.

Bob