US 11,705,178 B2
Method and apparatus for determining refresh counter of dynamic random access memory (DRAM)
Jing Chen, Hefei (CN); and Wei-Chou Wang, Hefei (CN)
Assigned to CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed by CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed on Apr. 19, 2022, as Appl. No. 17/659,708.
Claims priority of application No. 202111222328.4 (CN), filed on Oct. 20, 2021.
Prior Publication US 2023/0122701 A1, Apr. 20, 2023
Int. Cl. G11C 11/406 (2006.01); G11C 11/4096 (2006.01)
CPC G11C 11/40615 (2013.01) [G11C 11/4096 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for determining a refresh counter of a dynamic random access memory (DRAM), wherein the DRAM is configured to cyclically refresh a plurality of word lines in the DRAM in sequence from a preset word line according to a preset rule, and the method comprises:
writing data to a target memory cell connected with a target word line in the plurality of word lines;
controlling the DRAM to perform refreshes on the plurality of word lines starting from the preset word line according to the preset rule, and determining an intermediate refresh counter according to whether the data can be read from the target memory cell after a plurality of refreshes, wherein the intermediate refresh counter is a counter that the DRAM performs refreshes starting from the preset word line to the target word line according to the preset rule; and
controlling, based on the intermediate refresh counter, the DRAM to perform refreshes on the plurality of word lines starting from the target word line according to the preset rule, and determining the refresh counter of the DRAM according to whether the data can be read from the target memory cell after the refreshes, wherein the refresh counter is a counter that the DRAM performs refreshes starting from the target word line to the target word line again according to the preset rule.