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Altera_Forum's avatar
Altera_Forum
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16 years ago

about EPM240 high impedance output

im now encounter a problem with EPM240 high impedance output,it seems like the io port has connected a low value R to the ground that drop down the voltage provided by other signal on the bus. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

okay green and violett are what you want to have but red is what you get on your implementation ... a bit far away ...

the red lines might indicate some RC behavioral that it is not fast enough

if it is due to quartus setings, maybe somebody else could help you more but probably would need your project settings (qsf file).