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KMico's avatar
KMico
Icon for New Contributor rankNew Contributor
6 years ago

Issue with Micron MT25QL128 booting up at cold

I have a design that has a Cyclone V FPGA using a MT25QL128 quad-spi config flash. The config flash is having an issue booting up at cold (< -10 deg C) when utilizing Active Serial x4. If I create a ...
bitwise's avatar
bitwise
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

​KM - You mentioned that nCONFIG stays low. Since that is an input to your FPGA it would explain why it's not configuring; the part is waiting for nCONFIG to be deasserted since configuration begins on the low-to-high transition of nCONFIG. Sounds like there is something wrong outside the FPGA. Start looking into the logic that drives the nCONFIG net.