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Altera_Forum
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16 years ago

A question regarding MAX II I/O supply voltage

Hi everyone! Been searching the literature and googling around, but I've found no indication as to whether it is a problem to connect the VCCIO pins of the MAX II device to a non-standard volt...
Altera_Forum's avatar
Altera_Forum
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16 years ago

as fas as i had understood the vccio pins too, and used them, you apply the voltage on these pins for particular io bank's

for example on a cyclone III designe here, the external sdram runs at 3,0V so the vccio pins for these io's is also connected to 3,0v to enshure this interface runs at that voltage. 3,0 V due to the 3,3V IO theme with cyclone III.

so yes it is correct what you say, but you must take care about the voltage levels VioH and VioL so choose the correct io behavioral (VTLL VCMOS ....)