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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

The conf_done pin needs to see a 10k resistor to VCCIO of the respective IO-Bank.

Maybe the resistor is broken? If the aforementioned circuit is not present (respective damaged) you will see the FPGA constantly cycling through it's configuration scheme which should be easily measured with a scope on the aproppriate pins.