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Altera_Forum's avatar
Altera_Forum
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13 years ago

error CONF_DONE pin failed to go high : cyclone 4 evalboard

hi i am using the Cyclone IV GX FPGA Development Board. it has worked fine for the last few months but now when i try to download the sof file on the FPGA the prosses go to near 90% then i have th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

I've seen this kind of thing before. If you see the config done light blink momentarily, are there outputs that, once configured, are driving a short? Or causing the supply to droop? Check the all the supply voltages right at the moment that you see config done blink. I bet one of them is drooping, causing the FPGA to reset and look for another configuration.