- Patent Title: Refresh command control for host assist of row hammer mitigation
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Application No.: US17157826Application Date: 2021-01-25
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Publication No.: US11282561B2Publication Date: 2022-03-22
- Inventor: Bill Nale , Christopher E. Cox
- Applicant: Intel Corporation
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Compass IP Law PC
- Main IPC: G11C11/406
- IPC: G11C11/406 ; G11C11/4096 ; G06F3/06

Abstract:
A memory device with internal row hammer mitigation couples to a memory controller. The memory controller or host can assist with row hammer mitigation by sending additional refresh cycles or refresh commands. In response to an extra refresh command the memory device can perform refresh for row hammer mitigation instead of refresh for standard data integrity. The memory controller can keep track of the number of activate commands sent to the memory device, and in response to a threshold number of activate commands, the memory controller sends the additional refresh command. With the extra refresh command the memory device can refresh the potential victim rows of a potential aggressor row, instead of simply refreshing a row that has not been accessed for a period of time.
Public/Granted literature
- US20210151095A1 REFRESH COMMAND CONTROL FOR HOST ASSIST OF ROW HAMMER MITIGATION Public/Granted day:2021-05-20
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