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Apparatuses and methods for controlling refresh operations

  • US 9,922,694 B2
  • Filed: 05/15/2015
  • Issued: 03/20/2018
  • Est. Priority Date: 05/21/2014
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a first word line and a second word line being contiguous to the first word line;

    a control circuit comprises;

    a first defective address storing circuit configured to store first enable information along with first defective address information, the first enable infoiniation indicates whether the second word line is functional or the second word line is not functional, anda first detection circuit configured to provide a first signal based, at least in part, on the first enable information when the first word line is accessed, the first signal indicates whether the second word line is functional or the second word line is not functional; and

    wherein the control circuit is configured to activate the second word line for a target-row refresh operation when the first signal indicates that the second word line is functional and not to activate the second word line and instead activate another word line for the target-row refresh operation when the first signal indicates that the second word line is not functional.

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