Patent ID: 11947422
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 3:
4. The nonvolatile semiconductor memory device of claim 1, further comprising an error mitigating code encoder configured to perform an error mitigating encoding process of encoding original data to convert a data pattern of the original data to an error-mitigating data pattern, wherein the control circuit is configured to:
in a case where validation of the error correction code encoder and the error mitigating code encoder is instructed by the controller, perform, by using the error mitigating code encoder, the error mitigating encoding process with respect to data to be written to the write destination block, and perform, by using the error correction code encoder, the error correction encoding process to add an error correction code to the data which is encoded by using the error mitigating code encoder.