US 11,790,975 B2
Memory controller and memory system
Woongrae Kim, Gyeonggi-do (KR)
Assigned to SK hynix Inc., Gyeonggi-do (KR)
Filed by SK hynix Inc., Gyeonggi-do (KR)
Filed on Nov. 29, 2021, as Appl. No. 17/536,803.
Claims priority of provisional application 63/123,666, filed on Dec. 10, 2020.
Claims priority of application No. 10-2021-0026556 (KR), filed on Feb. 26, 2021.
Prior Publication US 2022/0189535 A1, Jun. 16, 2022
Int. Cl. G11C 7/04 (2006.01); G11C 11/406 (2006.01); G11C 11/4076 (2006.01)
CPC G11C 11/40615 (2013.01) [G11C 7/04 (2013.01); G11C 11/4076 (2013.01); G11C 11/40622 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A memory controller comprising:
a security level setting circuit suitable for setting a security level by monitoring a risk of a row hammer attack; and
a refresh management command control circuit suitable for controlling the number of times that a refresh management command is to be applied to a memory per unit time according to the security level.