Hello,
I am working with a Samsung K9F1G08Q0A flash (128MB). I have an interesting and frustrating problem: I can program even pages, but non-even pages are programmed a little and then filled with 0x3F. I even tried the sample code provided by NXP, and verified it against the data sheet and even with another, identical processor and flash - with the same results. Do you have an idea what might be wrong?