US 12,141,057 B2
Controller and method of calculating block stress index based on number of planes
Jong Wook Kim, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Dec. 7, 2022, as Appl. No. 18/076,798.
Claims priority of application No. 10-2022-0088350 (KR), filed on Jul. 18, 2022.
Prior Publication US 2024/0020015 A1, Jan. 18, 2024
Int. Cl. G06F 12/02 (2006.01)
CPC G06F 12/0246 (2013.01) [G06F 2212/7205 (2013.01); G06F 2212/7211 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A controller configured to:
generate a conversion value according to a number of selected planes during an erase operation and configured to calculate a stress index of a memory block based on the conversion value;
store, in a register, the stress index corresponding to the memory block; and
output a garbage collection signal based on comparing the stress index to a garbage collection reference value;
perform a garbage collection operation based on the garbage collection control signal.