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Altera_Forum's avatar
Altera_Forum
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20 years ago

high-level become 2v!!

hi: i met a very strange phenomenon! i define a bidir port named daccontrol[1..0],then i write the direction register so that i could define it as a output port, THEN I OUTPUT A "1" TO daccontr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

The IO direction may not working. So all the pins are Hi-Z input mode.

Make sure the access is "uncached".

Or try change the bidir port to a output only port, can help to identify the problem.