Atmel Rousset S.a.s.

Starchip

Samuel Charbouillot

Yves Fusella

Stephane Godzinski

Laurent Paris

Jean-Pascal Maraninchi

Stéphane Ricard

The invention relates to a method for managing the endurance of a data storage system provided with a set of sectors endowed with a guaranteed native endurance capacity (G), comprising the steps consisting in: &#x2014;partitioning said data storage system into a plurality of work sectors, and into a plurality of replacement sectors able to form an endurance reservoir, certain of the work sectors being intended to be replaced by replacement sectors when said work sectors are expended after a certain number of programming and/or erasure cycles; &#x2014;defining an address management area making it possible to retrieve the location of the replacement sectors assigned to expended work sectors; &#x2014;determining, sector by sector, whether a current work sector is physically expended, and executing a step of replacing this work sector by a replacement sector, only when said current work sector is declared physically expended. This method of managing endurance is in particular characterized in that in order to measure the expenditure of a sector, automatic reading of the quality of erasure of the memory points of the sector with respect to a severized reading criterion (margin Vref.) is carried out, that is to say one which is more severe than a normal criterion (Normal Vref.).

Method of managing the endurance of non-volatile memories

A subset of software objects stored in a first segment of non-volatile memory are identified as requiring frequent write operations or otherwise associated with a high endurance requirement. The subset of software objects are move to a second segment of non-volatile memory with a high endurance capacity, due to the application of wear leveling techniques to the second segment of non-volatile memory. The first and second segments of memory can be located in the same memory device or different memory devices.

Software adapted wear leveling

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Saint Maximin la Sainte Baume, France

Samuel Charbouillot