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Altera_Forum's avatar
Altera_Forum
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16 years ago

Low voltage for output from Cyclone III starter kit

Hello, I am looking for some advice - hopefully i have made a schoolboy error. I have a problem with an output from a cyclone III starter kit. I have written a very basic block of cod...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

All I/O banks of the Cyclone III starter board are powered by 2.5 V. So you should always get a 2.5 V square wave using a single ended I/O standard. 2.5V would the be the correct one, but there's no functional difference if you assign e.g. 3.0V LVCMOS.

I wonder if it can be a problem of not correctly probing the output signals at the HSMC connector?