公开(公告)号：US20220172785A1

公开(公告)日：2022-06-02

申请号：US17534989

申请日：2021-11-24

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sangjin YOO ,  Yunjung LEE ,  Heewon LEE ,  Kwangwoo LEE

IPC: G11C16/26 ,  G11C16/34

Abstract: Disclosed is an operation method of a controller which is configured to control a nonvolatile memory device. The method includes receiving cell counting data associated with selected memory cells included in the nonvolatile memory device from the nonvolatile memory device, adjusting operation parameters of the nonvolatile memory device based on the cell counting data, performing a valley search operation for the selected memory cells based on the adjusted operation parameters, and performing a read operation for the selected memory cells based on a result of the valley search operation.