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Altera_Forum's avatar
Altera_Forum
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17 years ago

communication with 3.3V devices with cyclone 3

Hi! Currently I have design board with cyclone 3. Cyclone 3 VCCIO supplies are connected to 2.5V. Other devices have 3.3V voltage supply. Regards to Cyclone 3 manual, it can be directly con...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

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When VCCIOs are connected to 3.0V is it possible to configure cyclone 3 in FPP mode?

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I don't know. I suggest to setup a design with FPP and try to compile it. Technically, it should work, but I don't know, if Quartus software would accept it. (Cause Cyclone III can't measure the real IO voltage, there are some options left...) Basically, I didn't yet understand the purpose of selecting different voltages with MSEL pinstrapping. May be, someone can clarify the point?