Patent ID: 11860734
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. The memory system of claim 17, wherein the memory controller comprises:
a poison flag generator configured to generate the poison flag under control of the control logic circuit, the poison flag indicating whether the main data corresponds to poisoned data, and
wherein, in a read operation, the on-die ECC engine, in response to the poison mode signal designating the poison mode, is configured to:
receive the main data read from the normal cell region in the target page;
receive the poison flag and the second parity data read from the parity cell region in the target page;
perform an ECC decoding operation on the main data and the poison flag based on the second parity data using the ECC to correct an error bit in the main data and the poison flag; and
transmit the main data and the poison flag to the memory controller.