Is it possible to power down the VCCIO voltage on unused banks in Stratix IV devices?

Description

Yes, you can power down the VCCIO voltage of unused I/O banks in Stratix® IV devices.  The Stratix IV device Power-On Reset (POR) circuitry does not monitor the VCCIO of the I/O banks, thus you do not need to power up the VCCIO on banks which are not using any I/O pins.

Altera® does not characterize device operation when the VCCIO voltages are not within recommended operating ranges.  There is minimal power savings when powering down the VCCIO voltages, and thus Altera recommends powering all VCCIO pins to a recommended operating voltage.