US 12,002,519 B2
Operation method of controller configured to control nonvolatile memory device and operation method of storage device
Sangjin Yoo, Bucheon-si (KR); Yunjung Lee, Suwon-si (KR); Heewon Lee, Seoul (KR); and Kwangwoo Lee, Seoul (KR)
Assigned to Samsung Electronics Co., Ltd., (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 24, 2021, as Appl. No. 17/534,989.
Claims priority of application No. 10-2020-0166010 (KR), filed on Dec. 1, 2020.
Prior Publication US 2022/0172785 A1, Jun. 2, 2022
Int. Cl. G11C 16/26 (2006.01); G11C 16/34 (2006.01); G11C 16/04 (2006.01)
CPC G11C 16/26 (2013.01) [G11C 16/3495 (2013.01); G11C 16/0483 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An operation method of a controller which is configured to control a nonvolatile memory device, the method comprising:
receiving cell counting data associated with selected memory cells included in the nonvolatile memory device from the nonvolatile memory device, wherein the receiving of the cell counting data associated with the selected memory cells included in the nonvolatile memory device from the nonvolatile memory device includes:
transmitting a first cell-counting command to the nonvolatile memory device; and
receiving the cell counting data 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.