Forum Discussion

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

IO SStandards in Cyclone IV

Hello, I wander what is the relationship between the VCCIO voltage and the IO standard which is actually configured. Lets say i select 3.3V LVCMOS standard for and an input signal. As long as...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

As reported, LVTTL and LVCMOS assignment doesn't change anything to the input buffer, which can be seen from the identical configuration bitstream. For the VCCIO variation, I suggest to make a basic test. Take care of the configuration related IO banks that don't work with voltages below 2.5 V.

Perhaps, an Altera forum user has tried before?