> Yes, this is known problem, especially if you are runnign the SPI bus > with higher data transfer rates and/or high CPM load ....
I lowered the SPI bus frequency, the interrupt is now always happening but I have always problems. I did further investigations, I'm doing spi transfers of 256 bytes both writing and reading (256 is the size of a page of the chip). I write one time and then read two times the complete 8Mbit chip. The two reading give me always the same result, then, the writing is failing in my case. Probably I have to double check the writing procedure. But it is also worth to note that changing the PM (prescaler module) and lowering the SPI clock even more the writing problem is happening less frequently. Thank you, Bye, Antonio.
