公开(公告)号：US11568917B1

公开(公告)日：2023-01-31

申请号：US17504705

申请日：2021-10-19

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Hoon Shin ,  Yeonhong Park ,  Jaewook Lee ,  Eojin Lee ,  Woosuk Kwon ,  Jungho Ahn ,  Taejun Ham

IPC分类号： G11C11/4078

摘要： A hammer refresh row address detector includes a control logic unit that receives a row address applied along with an active command, to increase a hit count stored in a corresponding entry when the row address is present in candidate aggressor row addresses stored in n entries. The control logic determines a candidate aggressor row address stored in an entry in which the hit count equals a threshold value to be a target aggressor row address. The control logic generates a victim row address adjacent to the target aggressor row address as a hammer refresh row address to accompany a hammer refresh command. The control logic increases the miss count value when the row address is not present in the candidate aggressor row addresses stored in the n entries and no hit count within the n entries is identical to the miss count value.