Methods, apparatus, and systems to repair memory

A system, comprising:

• a memory;
• a repair controller coupled to the memory, the repair controller to receive an address associated with the memory, the repair controller to store a first plurality of fields, each indicating a type of repair to be performed for at least a portion of memory cells corresponding to a memory address, and a second plurality of fields, each indicating a location of at least one memory cell used to perform the repair;
• and
• a memory controller coupled to the repair controller and the memory and to provide to the repair controller and the memory an address associated with the memory.

A method comprising:

• receiving a row address and a column address corresponding to memory cells of a memory device;
• determining a type of repair required for the memory cells using a first field in a repair controller;
• determining a location of at least one memory cell associated with the repair using a second field in the repair controller;
• if the type of repair is a partial row repair, then accessing a memory in the repair controller;
• and
• if the type of repair is a complete repair, then accessing a redundant block of memory cells in the memory device.

A method, comprising:

• receiving a row address and a column address;
• determining a location of repair data is either within a primary memory or a tag RAM using a plurality of fields;
• comparing column address received from a memory controller with an address from a tag RAM;
• selecting data stored in a standard block of memory block to perform one of a read or write operation, if there is no match between the column address received from the memory controller and the address from the tag RAM;
• using a pointer to locate repair data store in tag RAM, if there is a match between the column address received from memory controller and the address from tag RAM;
• and
• selecting the repair data stored in location identified by pointer to perform memory repair.