US 2002/0001237 A1 · Non-volatile memory device with configurable row redundancy

Abstract

A non-volatile memory device with configurable row redundancy includes a non-volatile memory having a matrix of memory cells and a matrix of redundant memory cells, both organized into rows and columns. The memory device also includes row and column decoding circuits; read and modify circuits for reading and modifying data stored in the memory cells; and at least one associative memory matrix, also organized into rows and columns, able to store the addresses of faulty rows, and control circuits for controlling the associative memory matrix. The memory device further includes a circuit for recognizing and comparing selected row addresses with faulty row addresses contained in the associative memory matrix, such as to produce de-selection of the faulty row and selection of the corresponding redundant cell row in the event of a valid recognition; and a configuration register, also comprising a matrix of non-volatile memory cells, and associated control circuits.

Claims20

Dependent claims

A non-volatile memory device with configurable row redundancy, comprising:

a non-volatile memory, itself comprising a matrix of memory cells and a matrix of redundant memory cells, both organized into rows and columns;
row and column decoding circuits coupled to the non-volatile memory;
read and modify circuits for reading and modifying data stored in the memory cells;
an associative memory matrix, also organized into rows and columns, the associative memory matrix being structured to store addresses of faulty rows of the non-volatile memory;
a circuit for recognizing and comparing a selected row address with the faulty row addresses contained in the associative memory matrix, and if a matching faulty row address is found, deselecting the faulty row addressed by the matching faulty row address and selecting a corresponding redundant cell row;
and
a configuration register coupled to the associative memory matrix and comprising a matrix of non-volatile memory cells.

4 more elements

A non-volatile memory device with configurable row redundancy, comprising:

a memory matrix of memory cells organized into rows and columns;
a redundant matrix of redundant memory cells organized into rows and columns;
an associative memory matrix, also organized into rows and columns, the associative memory matrix being structured to store addresses of faulty rows or faulty columns of the memory matrix;
and
a configuration register coupled to the associative memory matrix and programmed with information determining how many rows or columns of the redundancy matrix are assigned to a section of the memory matrix by the associative memory matrix.

2 more elements

Dependencies are inferred from the claim text.

Non-volatile memory device with configurable row redundancy

Life of this patent

Non-volatile memory device with configurable row redundancy

Life of this patent

Abstract

Claims20