p4080ds nor flash erase fail

[gaolixing]

our p4080ds is new,the erase time of nor flash is under 200 times,but when i program the jffs2 file system,a lot of errors are apeared,like that:

i use uboot and codewarrior10.5 program the jffs2 file system,the problem is still appeared,and i usr codewarrior10.5 to read the content of the nor flash,there are some different between the program file and read file,the follow is the picture:

and a lot of data write failed ,like that:

how can i fix it? 

[ufedor]

How many boards were tested?

Please doublecheck that the NOR Flash is properly powered and there are enough decoupling capacitors on the board.

Try to program test patters in a different address regions of the NOR Flash to verify whether the problem is general or local.

Another point to check is capturing a NOR Flash program cycle by means of a digital scope and verify that all timings correspond with the device datasheet.

[gaolixing]

thanks for your reply,i have only one p4080ds that buy from NXP sales,and the program error appears at rootfs address range,the rcw,uboot,kernel address range is ok,i use JFFS2 rootfs image,may it be the reason? 

[ufedor]

> i usr codewarrior10.5 to read the content of the nor flash

What was the complete sequence of operations after the JFFS2 image programming?