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

Claim 2:
3. The nonvolatile semiconductor memory device of claim 2, further comprising an error mitigating code decoder configured to decode data encoded by an error mitigating encoding process into original data, where the error mitigating encoding process converts 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 decoder and the error mitigating code decoder is instructed by the controller, perform, by using the error correction code decoder, an error correction decoding process with respect to encoded data which is read from the plurality of memory cells based on a process request from the controller, the encoded data including data and an error correction code, and perform, by using the error mitigating code decoder, an error mitigating decoding process to return the data which is error corrected into the original data.