Electronic system and refresh method
AssigneeSamsung Electronics Co., Ltd.
InventorsJong-Cheul Seo, Jin-Ho So, Hui-chong Shin, Meoung-Cheol Nam
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Abstract
An electronic system having a plurality of dynamic semiconductor memory devices and a refresh method for the same. The system comprises a plurality of dynamic semiconductor memory devices and a controller. Each of the dynamic semiconductor memory devices includes a storage device for storing a designated number designating an order for performing a refresh operation, a refresh enable signal generating circuit for generating a refresh enable signal in response to a refresh control command supplied from the controller and a delaying circuit for delaying the refresh enable signal by different time intervals determined by the designated number.
Claims12
An electronic system, comprising:
- a plurality of dynamic semiconductor memory devices;
- and
- a controller for controlling the semiconductor memory devices, wherein each of the dynamic semiconductor memory devices includes:
- a storage device for storing designated numbers designating an order for performing a refresh operation, the designated numbers being supplied from the controller when the electronic system is initialized;
- a refresh enable signal generating circuit for generating a refresh enable signal in response to a refresh controlling command supplied from the controller;
- and
- delay means for delaying the refresh enable signal by different time intervals which are determined by the designated numbers.
An electronic system, comprising:
- a plurality of dynamic semiconductor memory devices;
- and
- a controller for controlling the semiconductor memory devices, wherein each of the dynamic semiconductor memory devices includes:
- a storage device for storing a designated number designating an order for performing a refresh operation when the system is initialized;
- a decoder for generating a plurality of decoded signals by decoding the designated number;
- refresh enable signal generating means for generating a refresh enable signal in response to a refresh controlling command supplied from the controller;
- delaying means for delaying the refresh enable signal by a time interval which is determined by the designated number;
- switching means for transmitting the delayed refresh enable signal in response to the decoded signals;
- and
- refresh address generating means for generating a refresh address in response to an output signal output from the switching means.
A method of refreshing an electronic system including a plurality of dynamic semiconductor memory devices and a controller for controlling operation of the dynamic semiconductor memory devices, comprising:
- storing a designated number designating an order for performing a refresh operation on each of the plurality of dynamic semiconductor memory devices;
- and
- performing the refresh operation on the plurality of dynamic semiconductor memory devices in an order related to the designated number when a refresh control command is applied from the controller during the refresh operation.
Dependencies are inferred from the claim text.