SEMICONDUCTOR MEMORY DEVICE, MEMORY CONTROLLER, AND CONTROL METHOD OF MEMORY CONTROLLER

摘要

In a semiconductor memory device of an embodiment, a controller writes write data and first address management information including address information of the write data to a memory, and performs, when an error occurs in any of the write data read from the memory, an error correction process to an error correction group including the write data and the first address management information. The controller generates, when a read error is detected within a process target error correction group, second address management information including address information of write data within the process target error correction group and error position information indicative of a position of the read error, and writes invalid data and the second address management information to erased condition areas within areas to be written of the process target error correction group.

主权项

1. A semiconductor memory device comprising:
a nonvolatile semiconductor memory; and a memory controller configured to write a plurality of write data and first address management information including address information of the plurality of write data to the nonvolatile semiconductor memory, and when an error occurs in any of the plurality of write data read from the nonvolatile semiconductor memory, to perform an error correction process to an error correction group including the plurality of write data and the first address management information, wherein the memory controller generates, when a read error is detected within a process target error correction group, second address management information including address information of write data within the process target error correction group and error position information indicative of a position of the read error, and writes invalid data and the second address management information to erased condition areas within areas to be written of the process target error correction group.