Error repair location cache

摘要

A method for repairing a memory includes executing an Error Correction Code (ECC) for a page of the memory. The page includes a plurality of bits having an inherent number of failed bits equal to or greater than zero. The ECC is configured to correct a correctable number of failed bits from the plurality of bits. A location of a failure prone bit in the page is determined from a cache in response to the correctable number of failed bits being less than the inherent number of failed bits. A state of the failure prone bit is changed to a new state in response to determining the location of the failure prone bit. The ECC is executed in response to the state of the failure prone bit being changed to the new state.

主权项

1. A method for repairing a memory comprising:
executing an Error Correction Code (ECC) for a page of the memory, the page comprising a plurality of bits having an inherent number of failed bits equal to or greater than zero, the ECC configured to correct a correctable number of failed bits from the plurality of bits; determining from a cache, a location of a failure prone bit in the page, in response to the correctable number of failed bits being less than the inherent number of failed bits wherein said determining comprises matching a page address to one of a plurality of cache tags stored in the cache, each cache tag linked to a cache data including the location of a respective failure bit, at least one respective failure bit being the failure prone bit; changing a state of the failure prone bit to a new state, in response to determining the location of the failure prone bit; executing the ECC in response to the state of the failure prone bit being changed to the new state; and verifying a respective valid bit of a cache tag is true in response to matching the page address to one of the plurality of cache tags.