MICROCOMPUTER AND NON-VOLATILE SEMICONDUCTOR DEVICE

摘要

In the present invention, a program counter (12) updates an address by adding a first value or a second value. A code selection circuit (14), in accordance with addresses in the program counter (12), selects either an insertion code corresponding to an address specified at a program counter (12) within an insertion code register set block (17), or an original code of an address specified within the program counter (12) within a flash control code-use ROM (13). An instruction execution unit (15) executes the selected code. Any from among a plurality of original codes and/or insertion codes is a multi-cycle instruction. The program counter (14), at execution time of the multi-cycle instruction, stops update of the address.