System and method for preserving data in volatile memory
AssigneeNanya Technology Corporation
InventorsChung-Hsun LEE, Hsien-Wen LIU
Life of this patent
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Abstract
Present disclosure relates to a system for preserving data in a volatile memory and a method thereof. The volatile memory comprises a plurality of word lines for storing data. The system comprises an accessing detector. The accessing detector is configured to detect a row-hammer indication indicating a first word line is frequently accessed, wherein the accessing detector is configured to copy data stored in the first word line to a second word line when the row-hammer indication is detected on the first word line, wherein the data stored in the first and the second word lines are available to be selectively accessed.
Claims18
A system for preserving data in a volatile memory, wherein the volatile memory comprises a plurality of word lines for storing data, wherein the system comprising:
- a controller circuit, configured to detect a row-hammer indication indicating a first word line is frequently accessed, wherein the accessing detector copies data stored in the first word line to a second word line when the row-hammer indication is detected on the first word line, wherein the data stored in the first and the second word lines are available to be selectively accessed,
- wherein the first word line belongs to a first refreshing unit of the volatile memory and the second word line belongs to a second refreshing unit of the volatile memory,
- wherein the first refreshing unit and the second refreshing unit have different refresh cycles,
- wherein the controller circuit is further configured to discard the data stored in the first word line when the first refreshing unit is refreshed.
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A method for preserving data in a volatile memory, wherein the volatile memory comprises a plurality of word lines for storing data, wherein the method comprises:
- detecting, by an accessing detector, a row-hammer indication indicating a first word line is frequently accessed;
- and
- copying, by the accessing detector, data stored in the first word line to a second word line when the row-hammer indication is detected on the first word line, wherein the data stored in the first and the second word lines are available to be selectively accessed,
- discarding, by the accessing detector, the data stored in the first word line when the first refreshing unit is refreshed,
- wherein the first word line belongs to a first refreshing unit of the volatile memory and the second word line belongs to a second refreshing unit of the volatile memory,
- wherein the first refreshing unit and the second refreshing unit have different refresh cycles.
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Dependencies are inferred from the claim text.