US 2022/0068429 A1 · APPARATUSES AND METHODS FOR REFRESHING MEMORIES WITH REDUNDANCY

Abstract

Embodiments of the disclosure are drawn to apparatuses methods for checking redundancy information for row addresses prior to performing various refresh operations, such as auto refresh and targeted refresh operations. In some examples, refresh operations may be multi pump refresh operations. In some examples, a targeted refresh operation may be performed prior to an auto refresh operation responsive to a multi pump refresh operation. In some examples, redundancy information for the auto refresh operation may be performed, at least in part, during the targeted refresh operation. In some examples, refresh operations on word lines may be skipped when the redundancy information indicates the word line is defective or unused.

Claims20

Dependent claims

An apparatus comprising:

an address latch configured to store a first refresh address and a second refresh address, request redundancy information for word lines corresponding to the first refresh address and the second refresh address, and provide a third refresh address, wherein the third refresh address corresponds to at least one of the first refresh address or the second refresh address;
and
a redundancy information latch configured to receive redundancy information for the word lines corresponding to the first refresh address and the second refresh address and provide at least one of a mask signal or a refresh operation skip signal based, at least in part, on the redundancy information, wherein the mask signal masks the third refresh address and the skip signal causes the refresh operation to be skipped when the redundancy information indicates a word line associated with the third refresh address is defective or not in use.

Dependencies are inferred from the claim text.

Apparatuses and methods for refreshing memories with redundancy

Life of this patent

Apparatuses and methods for refreshing memories with redundancy

Life of this patent

Abstract

Claims20