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Altera_Forum
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16 years ago

VCCIO Voltage Change

Hi, I use EP3C10F256C8 chip , VCCIO set 1.8V , if other IO pin input set Hi(3.3V), result VCCIO change 2.2V? VCCIO set 1.5V , if other IO pin input set Hi(3.3V), result VCCIO change 2.2V?
Altera_Forum's avatar
Altera_Forum
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16 years ago

Yes you're right. Altera cancelled the "MultiVolt I/O Interface" that has been featured until Cyclone II, MAX II and Stratix II, without any explanation or understandable reason as far as I'm aware of. Furthermore, a similar specification of a Vih,max value can't be found with any other logic device, I think. Personally, I won't take the specification too seriously, but don't suggest to ignore it, of course.

Thanks for the clarifcation.