| 摘要 |
PROBLEM TO BE SOLVED: To provide a data processor capable of suppressing the generation of a gate disturbance phenomenon and improving reliability in a data processing using a built-in flash memory. SOLUTION: By holding the loop processing part of a program stored in a flash memory 2 in the storage area of an SRAM 4 corresponding to a range specified by an SRAM size storage means 8 from an address specified by an SRAM start address storage means 7, since read is performed only from the SRAM 4 from the second time of the loop processing, the flash memory 2 is not accessed in the case that the program is looped, the opportunities of normal read to the flash memory 2 are reduced, the gate disturbance phenomenon hardly occurs and the flash memory 2 holds stable data for a long period of time.
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