In a memory device, an on-die register is provided that is configured to
store a row address as well as a column address of a memory cell that
fails a test. Storing the row address frees testing from being limited to
activating at one time only rows related to a common redundant segment.
Storing the row address also guides repair using segmented redundancy. As
an addition or alternative, information may be stored in an anti-fuse
bank that is designed to provide access to a redundant cell but has not
yet enabled access to that cell. If the information stored in the
anti-fuse bank relates to the failure of the redundant cell, such
information may be used to avoid repairing with that redundant cell.