SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To solve a problem where a rewrite error and erasure error cannot be detected properly even when a flag storage area for detecting the rewrite error and erasure error is provided in a nonvolatile memory.SOLUTION: A semiconductor integrated circuit device includes a nonvolatile memory that stores a check flag for detecting a rewrite error or erasure error. If a nonvolatile transistor for the check flag does not output 0 (or 1) when an applied voltage to a control gate of the nonvolatile transistor is a rewrite verification voltage and if it does not output 1 (or 0) when the voltage is an erasure verification voltage, an error value indicating a rewrite or erasure error is generated.