INFORMATION PROCESSOR AND CONTROL METHOD OF INFORMATION PROCESSOR

PROBLEM TO BE SOLVED: To provide an information processor, capable of performing writing processing without forming a wasteful area in a flash ROM or causing overwrite, and a control method thereof. SOLUTION: The information processor comprises a CPU and the flash ROM 4 including a data area comprising a plurality of sectors and a patch area 25 similarly comprising erase units. The CPU writes new data which could not be written in a writing target address and additional information related to the new data to the patch area 25 since data is already stored in another address constituting two bytes paired with the writing target address of the data area. COPYRIGHT: (C)2007,JPO&INPIT