Invention Grant
- Patent Title: Refresh management for DRAM
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Application No.: US16875281Application Date: 2020-05-15
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Publication No.: US11222685B2Publication Date: 2022-01-11
- Inventor: Kevin M. Brandl , Kedarnath Balakrishnan , Jing Wang , Guanhao Shen
- Applicant: Advanced Micro Devices, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: Advanced Micro Devices, Inc.
- Current Assignee: Advanced Micro Devices, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Polansky & Associates, P.L.L.C.
- Agent Paul J. Polansky; Nathan H. Calvert
- Main IPC: G06F13/28
- IPC: G06F13/28 ; G11C11/406

Abstract:
A memory controller interfaces with a dynamic random access memory (DRAM) over a memory channel. A refresh control circuit monitors an activate counter which counts a rolling number of activate commands sent over the memory channel to a memory region of the DRAM. In response to the activate counter being above an intermediate management threshold value, the refresh control circuit only issue a refresh management (RFM) command if there is no REF command currently held at the refresh command circuit for the memory region.
Public/Granted literature
- US20210358540A1 REFRESH MANAGEMENT FOR DRAM Public/Granted day:2021-11-18
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