Memory systems that adjust an auto-refresh operation responsive to a self-refresh operation history

A memory system includes a semiconductor memory device and a memory controller. The semiconductor memory device includes a plurality of dynamic memory cells. The memory controller controls the semiconductor memory device. The memory controller applies an auto-refresh command to the semiconductor mem...

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Bibliographic Details
Main Authors Oh Tae-Young, Doo Su-Yeon, Park Kwang-Il
Format Patent
LanguageEnglish
Published 19.09.2017
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
INFORMATION STORAGE
PHYSICS
STATIC STORES
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Summary:A memory system includes a semiconductor memory device and a memory controller. The semiconductor memory device includes a plurality of dynamic memory cells. The memory controller controls the semiconductor memory device. The memory controller applies an auto-refresh command to the semiconductor memory device at each refresh interval of the semiconductor memory device such that the semiconductor memory performs a refresh operation in a normal mode, and does not apply the auto-refresh command to the semiconductor memory device during a self-refresh interval in which the semiconductor memory performs a self-refresh operation. After the semiconductor memory device exits from the self-refresh interval, the memory controller adjusts an application of the auto-refresh command in the normal mode by reflecting information of the self-refresh interval.
Bibliography:Application Number: US201615065211