Semiconductor memory device
AssigneeSK hynix Inc.
InventorsChang-Hyun Kim, Choung-Ki Song
Life of this patent
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Abstract
A semiconductor memory device includes a control signal generator suitable for generating a control signal corresponding to temperature information, a refresh controller suitable for enabling a refresh signal for a smart refresh operation at a predetermined moment in response to a refresh command signal and enabling the refresh signal for a normal refresh operation at a moment corresponding to the control signal in response to the refresh command signal, and a data storage suitable for storing a data and performing the smart refresh operation and the normal refresh operation in response to the refresh signal of the refresh controller.
Claims17
A semiconductor memory device, comprising:
- a control signal generator suitable for generating a control signal corresponding to temperature information;
- a refresh controller suitable for enabling a refresh signal for a smart refresh operation at a predetermined moment in response to a refresh command signal and enabling the refresh signal for a normal refresh operation at a moment corresponding to the control signal in response to the refresh command signal;
- and
- a data storage suitable for storing a data and performing the smart refresh operation and the normal refresh operation in response to the refresh signal of the refresh controller.
A semiconductor memory system, comprising:
- a controller suitable for controlling a refresh operation by generating successive refresh command signals during a refresh operation section and replacing at least one refresh command signal among the successive refresh command signals with another command signal in response to temperature information;
- and
- a semiconductor memory device suitable for performing the refresh operation in response to the refresh command signal and performing an operation corresponding to the another command signal.
A method for operating a semiconductor memory system, comprising:
- comparing a predetermined maximum number of times of a refresh operation during a refresh operation section with a number of times of a refresh operation to be performed;
- replacing the refresh operation with another operation based on a comparison result;
- and
- performing the refresh operation and the another operation.
Dependencies are inferred from the claim text.