Confirmed! Using the MPC reset pin (instead of PORESET) solves it. Thank you all
Arno > You first need to e.g. write a reset cmd (0x5050) to it or connect > the processor's hardreset line to the flash device. > Jaap-Jan > > I think you need to connect your flash reset pin to the MPC reset pin so > that > the CPU reset will reset the flash as well. > > Jocke