Patent ID: 11909415
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 14:
15. A memory system, comprising:
a nonvolatile memory including a plurality of memory cells; and
a memory controller which controls the nonvolatile memory,
wherein in read operation for the memory cells, the memory controller is configured to:
perform tracking including a plurality of reads in which a read voltage is shifted;
calculate a soft bit read voltage from results of the tracking; and
perform a soft bit decoding process using the calculated soft bit read voltage,
wherein when the soft bit read voltage is changed in accordance with limitations of a set limit value of the read voltage, the memory controller adjusts intervals between soft bit read voltages set between the changes soft bit read voltage and a hard bit read voltage determined based on the results of the tracking.