US 12,125,514 B2
Apparatuses and methods for access based refresh operations
Takamasa Suzuki, Tokyo (JP)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by MICRON TECHNOLOGY, INC., Boise, ID (US)
Filed on Apr. 28, 2022, as Appl. No. 17/731,529.
Prior Publication US 2023/0352075 A1, Nov. 2, 2023
Int. Cl. G11C 7/00 (2006.01); G11C 11/406 (2006.01); G11C 11/408 (2006.01); G11C 11/4093 (2006.01)
CPC G11C 11/40611 (2013.01) [G11C 11/40618 (2013.01); G11C 11/4085 (2013.01); G11C 11/4093 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
accessing a word line in a first sub-bank of a memory bank;
refreshing a word line in a second sub-bank of the memory bank responsive to accessing the word line in the first sub-bank;
counting a number of times a refresh operation is performed on the second sub-bank; and
providing a refresh signal based on the number of times being less than a threshold at an end of a refresh period.