Max 10 VCCIO sharing

[Altera_Forum]

Is it possible to share a source for the VCCIO of multiple banks? If so does this require some type of filtering?

[Altera_Forum]

Hi, you can share a source on the VCCIO of multiple banks which required the same voltage level for each I/O bank. The shared I/O pins can only support a VCCIO range of 1.5V to 3.3V. 

You may refer to Max 10 Pin Connection Guidelines for more understanding about the VCCIO. https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/dp/max-10/pcg-01018.pdf

[Altera_Forum]

Generally the VCCIO of an I/O bank would be governed by the outputs. You may base on this to plan for the VCCIO supplies sharing. To double confirm the VCCIO of an I/O bank, you may also run through design with Fitter and then cross check with Fitter report.

[Altera_Forum]

Sharing is possible, but make sure your regulator can meet the current consumption. Adding a Ferrite bead is safer for isolation purpose, optional though.

[Altera_Forum]

When you combine supplies, you must meet the additive minimum current requirement for both rails as reported in the power estimation tools. The power up current requirement will continue until the Power On Reset (POR) event has completed.