ONE CHIP MICROCOMPUTER AND DATA REFRESHING METHOD

摘要

PROBLEM TO BE SOLVED: To improve a data holding characteristic by rewriting data to a non- volatile memory before defective read-out is caused. SOLUTION: A data holding characteristic is improved by providing a non- volatile memory group 40 for reference of which a characteristic is inferior to a non-volatile memory in a memory cell array, and rewriting data accumulated in a non-volatile memory by a control circuit 44 based on a referred result of the non-volatile memory group 40 for reference.