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US 9,852,813 B2Granted
Methods, apparatus, and systems to repair memory
AssigneeMicron Technology, Inc.
InventorTodd Houg
Life of this patent
Estimating the term…
Abstract
Methods, apparatus and systems pertain to performing READ, WRITE functions in a memory which is coupled to a repair controller. One such repair controller could receive a row address and a column address associated with the memory and store a first plurality of tag fields indicating a type of row/column repair to be performed for at least a portion of a row/column of memory cells, and a second plurality of tag fields to indicate a location of memory cells used to perform the row/column repair.
Claims13
A method, comprising:
- receiving a row address and a column address;
- determining that an address of repair data is within a primary memory or a tag random access memory (RAM) using a plurality of fields;
- comparing the column address with an address from the tag RAM to generate a control signal to instruct a selector to select data from either the primary memory or the tag RAM;
- selecting data stored in a standard block of the primary memory to perform one of a read or write operation, when there is no match between the column address and the address from the tag RAM;
- and
- using a pointer to locate the repair data stored in the tag RAM, when there is a match between the column address and the address from the tag RAM, and selecting the repair data stored in a location identified by the pointer to perform a memory repair, wherein a field of the tag RAM is configured to store information to create the pointer to locate the repair data stored in the tag RAM.
3 more elements
Dependencies are inferred from the claim text.