We've been using the NOR Flash AM29F032B for several years on our products. A strange event has been occurred twice during these years. Data of some address units all turned into 0x00 when the programm only read the flash. The throuble address units are as follow:
We are sure that our timing design is correct as the datasheet informed. Could you please explain the reason for this event? Thank you very much!
thank you for the reply. We produced 400 devices and each of them has one flash chip. The data were written one month ago and when we checked them(hy just reading test)the issue happend. 2 devices got the problem. We reprogramed the locations and the data were read correct again. We tried really hard to test the chip but the issue never happened again. It's a mystery to us now.