Patent ID: 11941293
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 14:
15. An operation method of a storage controller that communicates with a non-volatile memory device, the method comprising:
determining whether a first read voltage is registered at a history table;
when it is determined that the first read voltage is registered at the history table, performing a first direct memory access (DMA) read operation on data stored in the non-volatile memory device, based on the first read voltage;
obtaining a page count value, based on the first DMA read operation;
determining a second read voltage different from the first read voltage based on a difference between the page count value and an idle count value, without an additional read operation for the data stored in the non-volatile memory device; and
updating the history table by changing the first read voltage of the history table to the second read voltage.