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Method for managing flash memory

A technology of flash memory and large-capacity memory, applied in static memory, memory system, read-only memory, etc.

Active Publication Date: 2015-07-01
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it is expected to update small data packets that change over time, it is impossible to overwrite (écraser) old data with current data

Method used

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  • Method for managing flash memory
  • Method for managing flash memory
  • Method for managing flash memory

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 The flash memory is illustrated very schematically. The memory consists of multiple sectors and figure 1 Two of these are schematically represented by rectangles. figure 1 Thus a sector called S1 is shown, as well as a sector called Sn, which is also in the figure 1 are shown on an enlarged scale.

[0038] exist figure 1In the zoomed-in detail of , first notice data page 2. Below the group of data pages 2, there is a first block each time, which takes the form in the example of block footer BF. A group of data pages 2 may contain zero, one or more data pages 2 . The structure of the block foot BF will be described in more detail in the following description.

[0039] Each sector of the flash memory also contains at least one management block AB containing information useful for the reading of the data located in that sector. figure 1 A first management block AB1 and a second management block ABn are illustrated. In a novel way, these management blocks ...

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PUM

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Abstract

The present invention concerns a method concerning a rewritable mass memory subdivided into sectors (Sn) inside which pages (WL) of data are recorded, said data being periodically updated. The deletion of a piece of data from a sector involves the deletion of all the data previously written into this sector before the writing of any new piece of data. Said method comprises the following steps: writing pieces of data successively in a sector, each piece of data being associated with a first block (BF) containing at least a piece of information for indentifying the piece of data, writing, in an administrative block (AB), data containing administrative information for managing the data of the sector concerned in said sector, each administrative block being written from the other data of the sector and being associated with a second block (BF') comprising a piece of information for identifying data and a piece of control information, an administrative block comprising a first part (14) giving general indications and a second part (16) incorporating a counter that increments each time an administrative block is written in a new sector, each first block comprising a control number (12) that is based on the counter of the corresponding administrative block.

Description

technical field [0001] The field of the invention is that of memory management in a calculateur. There are many types of electronic memory, which exhibit occasionally different modes of operation. The present invention relates more particularly to memories known as flash memories. It is here a rewritable semiconductor mass memory. Such a memory thus has the characteristics of a random access memory (RAM). However, it presents the advantage that the stored data does not disappear when the memory is no longer powered. Background technique [0002] Flash memory is used, for example, in popular devices, such as, for example, USB disks (abbreviated as “Universal Serial Bus” in English, namely Universal Serial Bus). Since their prices are not too high, these flash memories are increasingly used in industry. It is then replacing memories of the EEPROM type that are commonly used, for example, in industrial computers. [0003] The term EEPROM is an English acronym for "Electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/02G11C29/00G06F3/06
CPCG11C16/349G11C29/82G06F2212/7209G06F12/0246G06F2212/7207G06F3/0614G06F3/064G06F3/0679G06F2212/7205G06F2212/7206
Inventor N.布尔西尔A.梅尔瓦尔德
Owner VTESCO TECH GMBH