Method of operating a memory system having an erase control unit

摘要

A method of operating a memory system including a nonvolatile memory including a memory block, and a memory controller including an erase control unit, includes performing pre-reading a plurality of memory cells connected to a selected word line of the memory block, generating an off cell count based on the pre-reading result, by operation of the erase control unit, comparing the off cell count with a reference value to generate a comparison result, and changing an erase operation condition based on the comparison result, by operation of the nonvolatile memory, and erasing the memory block according to the changed erase operation condition.

主权项

1. A method of operating a memory system including a nonvolatile memory including a memory block, and a memory controller including an erase control unit, the method comprising:
performing pre-reading of a plurality of memory cells connected to a selected word line of the memory block; generating an off cell count based on the pre-reading result; by operation of the erase control unit, comparing the off cell count with a reference value to generate a comparison result, and changing an erase operation condition based on the comparison result; by operation of the nonvolatile memory, erasing the memory block according to the changed erase operation condition.