ESP32 Forum

I've made a custom board using an ESP32-S3 processor that I'm having trouble flashing code onto.

Its currently using IS25LP032D-JKLE which is giving me Stage 2 bootloader checksum issues, even after a full-chip erase. When prototype boards were made using W25Q32JVZPIQ there were no issues, but with the ISSI chip we're now seeing a 100% failure rate.

I've pored over the datasheets and can see no differences, but maybe Im too close to see any issues.

If hardware compatible, what can be done software-wise to use this chip (save me resoldering ~100 PCBs).

idf.py menuconfig and latest test Logs attached

Issue was the SPI Flash speed, which had to be set to 40Mhz, auto settings defaulted to 80Mhz which was too fast for this chip (Max 50Mhz from the datasheet)