Not if the code to do the writing is on the external flash. Memory mapped mode is read only. To write, you could have some blocking code on your internal flash that disables memory mapped mode, performs the write and then re-enables memory mapped mod...

Hi frackers, This is normal and just fine, the write protect pin simply protects writes to the memory, not the registers of the flash chip. When you enable QPI by writing to the status register (don't forget to write enable first), IO2 & 3 will then ...