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Altera_Forum's avatar
Altera_Forum
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10 years ago

Cyclone IV fails to configure below -20C

I have a Cyclone IV design that operates correctly down to -20C but fails to configure below that temp. I have attached the schematic for the configuration block along with a scope trace showing co...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

All parts are rated to -40C or lower. nCONFIG never gets released by the reset device at temperatures below -20C preventing configuration. This circuit has been used on another project and works down to -45C. It definitely looks like it is not an FPGA problem.