Hi again,
I now finally found the time to try reading/writing the chip. I re-used the MACRONIX_MX25L12805D configuration because it seemed quite similar to me.
Reading the chip passes without any error.
When trying to write the chip, it apparently fails to erase it, see attached log. Looking at the datasheet for my chip, I would say the first erase function (opcode 0x20) with 4096 4K blocks should work.
I tried with different spispeeds without any difference.
Any ideas?
Thanks
Fabian