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Altera_Forum
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18 years ago

Cyclone III/HSMC pin voltage

I have a Cyclone III starter kit with the Bitec HSMC breakout adapter, and I need to interface with some 3.3V devices through the adapter pins. It seems that even changing the pin voltage in th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hello,

I don't know about the details of the said hardware, but I/O voltage is primarly a hardware feature, defined by supplying the respective VCCIO with either 2.5 or 3.3 V. IO-standard should be set according to VCCIO but can't change the pin voltage.

Regards,

Frank