Storage device and method for reading the same
AssigneeSamsung Electronics Co., Ltd.
InventorsYong June Kim, Heeseok Eun, Han Woong Yoo, Jaehong Kim, Hong Rak Son
Life of this patent
Estimating the term…
Abstract
The storage device includes a storage unit configured to store data, an error controlling unit configured to correct an error of the data read out from the storage unit according to at least one read level, and a read level controlling unit configured to control the at least one read level when the error is uncorrectable. The read level controlling unit is configured to measure a distribution of memory cells of the storage unit, configured to filter the measured distribution, and configured to reset the at least one read level based on the filtered distribution.
Claims19
A storage device comprising:
- a storage unit configured to store data;
- an error controlling unit configured to correct an error of the data read out from the storage unit according to at least one read level;
- and
- a read level controlling unit configured to control the at least one read level when the error is uncorrectable, wherein
- the read level controlling unit is configured to measure a distribution of memory cells of the storage unit, configured to filter the measured distribution, and configured to reset the at least one read level based on the filtered distribution.
A method for reading a storage device, comprising:
- determining whether to convert a read level according to an error of data that is read according to at least one first read level;
- first measuring a distribution of memory cells of the storage device;
- filtering the measured distribution;
- setting at least one second read level;
- second measuring the distribution of the memory cells of the storage device based on the filtered distribution when the read level is converted;
- and
- reading the data based on the at least one second read level.
Dependencies are inferred from the claim text.