My customer uses ADuC848, but they have some problem at Flash writing in ADuC848.
Whenever they write Flashmenory of ADuC848 through UART between PC and ADuC848, they can confirm values of Flash memory and their writing procedure is normal.
But after power off and then power on again, values in Flash memory are different values that they write at Flash memory before power off.
Ex, Write to Flash memory (FFFF) --> Read from Flash memory (FFFF) --> Power off --> Power on --> Read from Flash memory (Not FFFF)
Would you confirm this issue and let me know how to solve this issue?
I attached the circuit diagram aroung ADuC848 and their flash R/W code.
Please advise me.
If you have any questions, please let me know.