Patent ID: 11869615
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 2:
3. The method for reading and writing according to claim 1, comprising:
providing a lookup table, wherein address information of the memory cell and a numerical code corresponding to the address information are recorded in the lookup table, the numerical code being composed of a first type code and a second type code, the first type code being configured for marking whether the address information is valid, and the second type code being configured for recording the identification code of the spare memory cell; and
revising, in the lookup table, the first type code of the numerical code corresponding to the address information pointed to by the read command as an invalid marked value if the error occurs in the data to be read out, and revising the second type code as the identification code configured for identifying the spare memory cell.