MICROCOMPUTER

PROBLEM TO BE SOLVED: To perform interruption processing while a storage region storing an interruption vector of a non-volatile memory is rewritten in a microcomputer incorporating the non-volatile memory having a plurality of storage regions where electric deletion and writing can independently be performed. SOLUTION: An interruption vector 21 is stored in a bank B of a dual operation flash memory 2. An alternative interruption vector 24 corresponding to the interruption vector 21 is stored in a bank A. When the interruption vector 21 is accessed from a CPU 1 during a rewriting processing of the bank B, an interruption vector address conversion circuit 4 converts an address into that of the alternative interruption vector 24 and accesses the memory 2. Thus, interruption vector data are acquired and the interruption processing is started. COPYRIGHT: (C)2004,JPO&NCIPI