Patent ID: 11886293
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A method of operating a memory controller for controlling a memory device, the method comprising:
designating one or more cells of a memory cell array as a monitoring unit;
collecting hard decision information based on data read from memory cells using a normal read level;
collecting soft decision information based on data read from the memory cells using one or more offset read levels that are different from the normal read level;
storing first strong error information determined based on the hard decision information and the soft decision information in a memory in the memory controller;
as an uncorrectable error occurs in data read in response to a read request from a host, generating second strong error information based on the hard decision information and the soft decision information collected by re-reading the memory cells; and
correcting an error in the data read in response to the read request using the first strong error information and the second strong error information.