US 12,354,676 B2
Method for managing threshold voltage, and method for reading flash data
Haojun Fang, Shenzhen (CN); and Yunxin Huang, Shenzhen (CN)
Assigned to DapuStor Corporation, Shenzhen (CN)
Filed by DapuStor Corporation, Shenzhen (CN)
Filed on May 24, 2023, as Appl. No. 18/201,757.
Application 18/201,757 is a continuation of application No. PCT/CN2021/121392, filed on Sep. 28, 2021.
Claims priority of application No. 202011556493.9 (CN), filed on Dec. 23, 2020.
Prior Publication US 2023/0298676 A1, Sep. 21, 2023
Int. Cl. G11C 16/34 (2006.01); G11C 16/04 (2006.01); G11C 16/26 (2006.01)
CPC G11C 16/3404 (2013.01) [G11C 16/0483 (2013.01); G11C 16/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for managing one or more threshold voltages, comprising:
acquiring a target block comprising a subregion that is programmed with a preset data sequence, such that the subregion of the target block has a first piece of cell state distribution information determined based on the preset data sequence; and
when a preset scanning interval is reached, scanning the one or more threshold voltages based on the sub-region of the target block, the first piece of cell state distribution information, and an optimal threshold voltage table that stores the one or more threshold voltages, and periodically managing the optimal threshold voltage table.