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Why do some contents in the flash memory are rewritten?

Latest Updated:04/05/2011

Question:

Sometimes the contents in the flash memory are rewritten.

Answer:

Does the user program contain any code to use the CPU rewrite mode, which is used to rewrite the flash memory? The flash memory may be rewritten if an unintentional operation in the user program, such as program runaway executes a CPU rewrite program.
Suitable Products
R8C/1x
R8C/2x
R8C/3x
R8C/Lx
R8C/Mx