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US 12,749,523 B2Granted
Apparatuses and methods for access based targeted refresh operations
AssigneeMicron Technology, Inc.
InventorsYuan He, Takamasa Suzuki
Life of this patent
Estimating the term…
Abstract
Apparatuses, systems, and methods for access based targeted refresh operations. A memory bank has a first sub-bank and a second sub-bank. A refresh control circuit detects an aggressor in one of the sub-banks. Responsive to an access in the other sub-bank, the refresh control circuit performs a targeted refresh operation based on the sub-bank based on the aggressor address.
Claims20
An apparatus comprising:
- a row hammer detector configured to detect an aggressor address and set a row hammer flag when the aggressor address is detected;
- a comparator configured to compare the aggressor address to an accessed address and provide an active match signal when the aggressor address and the accessed address are in different sub-banks;
- and
- a logic circuit configured to provide a targeted refresh command responsive to an access command when the match signal is active.
1 more element
A method comprising:
- detecting an aggressor address and setting a row hammer flag when the aggressor address is detected;
- comparing the aggressor address to an accessed address and providing an active match signal when the aggressor address and the accessed address are in different sub-banks;
- and
- providing a targeted refresh command responsive to an access command when the match signal is active.
1 more element
An apparatus comprising:
- an aggressor detector circuit configured to activate a flag responsive to detecting an aggressor address in a sub-bank and provide the aggressor address;
- a comparator configured to determine if an accessed address matches the aggressor address and issue an active match signal when the aggressor address and the accessed address are in different sub-banks;
- a logic circuit configured to provide a targeted refresh signal to the sub-bank responsive to the activated flag;
- and
- a refresh address generator configured to provide a refresh address based on a refresh signal or the targeted refresh signal.
2 more elements
Dependencies are inferred from the claim text.