Memory device and control method thereof

A memory device includes a memory block including a plurality of sectors, and a control unit configured to: pre-store a plurality of first indicators in a storage unit, the plurality of first indicators respectively corresponding to a plurality of refresh units in the memory block, each refresh unit...

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Bibliographic Details
Main Authors Lim, Seow Fong, Hung, Hsi-Hsien
Format Patent
LanguageEnglish
Published 26.02.2019
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INFORMATION STORAGE
PHYSICS
STATIC STORES
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Summary:A memory device includes a memory block including a plurality of sectors, and a control unit configured to: pre-store a plurality of first indicators in a storage unit, the plurality of first indicators respectively corresponding to a plurality of refresh units in the memory block, each refresh unit including at least one sector, and the first indicators being generated based on a first reference voltage level; and in an erase cycle for erasing a target sector of the memory block: read data from a selected one of the refresh units with a second reference voltage level; generate a second indicator for the selected refresh unit based on the data; compare one of the first indicators corresponding to the selected refresh unit with the second indicator of the selected refresh unit; and if the second indicator is not equal to the first indicator, refresh data in the selected refresh unit.
Bibliography:Application Number: US201715420367