Invention Grant
- Patent Title: Refresh hidden eDRAM memory
- Patent Title (中): 刷新隐藏的eDRAM内存
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Application No.: US14571496Application Date: 2014-12-16
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Publication No.: US09281045B1Publication Date: 2016-03-08
- Inventor: Darren L. Anand , Venkatraghavan Bringivijayaraghavan , Krishnan S. Rengarajan
- Applicant: International Business Machines Corporation
- Applicant Address: KY Grand Cayman
- Assignee: GLOBALFOUNDRIES INC.
- Current Assignee: GLOBALFOUNDRIES INC.
- Current Assignee Address: KY Grand Cayman
- Agency: Roberts Mlotkowski Safran & Cole, P.C.
- Agent Catherine Ivers; Andrew M. Calderon
- Main IPC: G11C11/24
- IPC: G11C11/24 ; G11C11/406 ; G11C11/4091 ; G11C11/4093 ; G11C11/4094 ; G11C11/4096

Abstract:
A first data access request to a first row of a first memory array of the DRAM is received while a refresh operation in the first memory array is executing. The refresh operation is paused. The first data access request is executed, and simultaneously, the bits of the first row of the first memory array, including any updates indicated in the first data access request, are latched to a transfer register. The bits latched to the transfer register are written to a corresponding first row in a second memory array of the DRAM. A bank select logic is updated to indicate that subsequent data access requests to the first row in the first memory array will be executed from the second memory array. The refresh operation is then resumed.
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