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Apparatuses and methods for targeted refreshing of memory

  • US 9,324,398 B2
  • Filed: 02/04/2013
  • Issued: 04/26/2016
  • Est. Priority Date: 02/04/2013
  • Status: Active Grant
First Claim
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1. A method for refreshing memory, comprising:

  • identifying, with a device external to the memory, a row of memory cells in the memory that has been accessed more than a threshold number of times as a target row of memory cells, wherein the target row of memory cells is associated with a target row address;

    responsive to identification of the target row of memory cells having been accessed more than the threshold number of times;

    causing a predecoder of the memory to be provided with a first row address and a first active command, wherein the first row address is adjacent to and precedes the target row address, and wherein the predecoder causes a first row of memory cells physically adjacent to the target row of memory cells to be refreshed responsive to being provided with the first row address and the first active command;

    causing the predecoder of the memory to be provided with a second row address and a second active command, wherein the second row address is adjacent to and follows the target row address, and wherein the predecoder causes a second row of memory cells physically adjacent to the target row of memory cells to be refreshed responsive to being provided with the second row address and the second active command; and

    causing the predecoder of the memory to be provided with the target row address and a third active command, wherein the predecoder causes the target row of memory cells to be refreshed responsive to being provided with the target row address and the third active command.

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