Method for controlling a DRAM
First Claim
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1. A method for controlling a DRAM, the DRAM comprising a memory array constructed by memory cells of M columns and N rows, the method comprising:
- detecting defect memory cells of the DRAM;
recording corresponding rows of the detected defect memory cells;
receiving a control command for accessing a memory cell located in an X column and a Y row of the DRAM;
detecting if the Y row is in the recorded rows of the detected defect memory cells; and
accessing a memory cell located in the X column and a Z row of the DRAM according to the control command and the detecting result.
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Abstract
A method for controlling a DRAM includes detecting failed memory cells of the DRAM, recording the rows corresponding to the failed memory cells, receiving a control signal for accessing the memory cell with column address X and row address Y, determining if the row address Y is in the recorded failed rows list, and if yes, replacing the memory cell to be accessed with the memory cell with the column address X and row address Z which is not same as Y.
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Citations
8 Claims
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1. A method for controlling a DRAM, the DRAM comprising a memory array constructed by memory cells of M columns and N rows, the method comprising:
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detecting defect memory cells of the DRAM; recording corresponding rows of the detected defect memory cells; receiving a control command for accessing a memory cell located in an X column and a Y row of the DRAM; detecting if the Y row is in the recorded rows of the detected defect memory cells; and accessing a memory cell located in the X column and a Z row of the DRAM according to the control command and the detecting result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification