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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

If you refer to the same table 1-13, I find in the hardware manual (Cyclone III Devices Single-Ended I/O Standard Specifications), it's showing Vih min values. So it doesn't say anything about allowed maximum input levels.