US 2024/0176697 A1 · Controller-Level Memory Repair

Abstract

Described apparatuses and methods facilitate sharing redundant memory portions at a controller-level to enable memory repair between two or more memory blocks. Each memory die of multiple memory dies can include, for instance, multiple spare rows for use if a row of a memory array has a faulty bit. If a memory die has more faults than spare rows, the memory die cannot repair the additional faults. This document describes a controller that can inventory unrepaired faults and available spare rows across multiple memory dies. The controller can then “borrow” a spare row from a second memory die that has an available one and “share” the spare row with a first memory die that has a fault than it cannot repair. The controller can remap a memory access request targeting the row with the unrepaired fault in the first memory die to a spare row in the second memory die.

Claims20

Dependent claims

A method by a controller, the method comprising:

receiving a memory access request including an address;
determining that the address corresponds to a faulty address of a first memory block;
remapping the memory access request at least partially to a memory portion of a second memory block to produce a remapped memory access request responsive to the determining, the memory portion of the second memory block designated to provide redundancy for one or more memory portions of the second memory block;
and
transmitting the remapped memory access request to the second memory block.

2 more elements

An apparatus comprising:

an interface configured to be coupled to at least one bus that provides access to multiple memory dies;
and
controller logic coupled to the interface, the controller logic configured to:
determine that an address of a memory access request corresponds to a faulty address of a first memory portion of a first memory block of the multiple memory dies;
remap the memory access request at least partially to a second memory portion of a second memory block of the multiple memory dies to produce a remapped memory access request responsive to the determination, the second memory portion of the second memory block designated to provide redundancy for one or more memory portions of the second memory block;
and
transmit the remapped memory access request to the second memory block.

4 more elements

Dependencies are inferred from the claim text.

Controller-Level Memory Repair

Life of this patent

Controller-Level Memory Repair

Life of this patent

Abstract

Claims20