| 摘要 |
PROBLEM TO BE SOLVED: To execute an instruction to use data written in a vector table region in a loader region in which on-board rewriting is unavailable by realizing the rewriting in the loader region at the time of changing data in the vector table region after a user program is changed in a microcomputer incorporating a flash EEPROM. SOLUTION: At the time of on-board rewriting, the data of a vector table region after program change are written in a rewritable firm region. When an instruction to read the vector table region is executed after the on-board rewriting, an address converter 12 converts an address outputted from a CPU 11 into the address of the film region, and reads the data after change to execut the instruction after change.
|
