Method for using flash memory

A technology of flash memory and characteristics, applied in the field of storage, can solve the problems of waste of flash memory storage resources and the inability to effectively use sectors, and achieve the effect of improving the utilization rate

Active Publication Date: 2009-05-27
SHENZHEN CHIPSBANK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as mentioned above, using this method, as long as there is a bad sector in a block, the entire block is marked as a bad block, and the entire block is shielded. The good sectors in the block will be shielded, because this method cannot effectively use the good sectors in the block with bad sectors, resulting in a waste of limited flash memory storage resources

Method used

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  • Method for using flash memory

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Embodiment Construction

[0035] In order to enable those skilled in the art to better understand the present invention, the method for utilizing flash memory provided by the present invention will be specifically described below in conjunction with specific embodiments.

[0036] Information is represented by signals such as language, text, sound, graphics, and images. Information cannot exist independently. It needs to be transformed into a physical form, which is what we usually call data. Data is a variety of physical symbols and their combinations, which reflect the content of information. The form of data changes as the physical medium changes. For example, if a song is recorded on a tape and burned on a CD, they can deliver the song. On magnetic tape, the data are magnetic signals of varying magnetic strength; on optical discs, they are pits of varying depths. But the information they record is the same.

[0037] In the field of computer, the basic function of computer is to calculate and proc...

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PUM

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Abstract

The present invention discloses a method utilizing flash memory, which comprises the following steps: scanning and classifying flash memory according to quality of flash memory; storing data of corresponding importance according to flash memory classify result; setting page of bad sector to be write-inhibiting page and page have no bad sector to be normal page according to scan result; executing the first scheduled operation to normal page when number of scanned bad sector smaller than or equal to preset value; executing the second scheduled operation to normal page when number of scanned bad sector bigger than the preset value. Flash memory is classified according to flash memory quality, data of corresponding importance is stored on the basis of classification, page has no bad sector is set to be normal page, and corresponding storage procedure to normal page is executed according to number of bad sector, hence normal page has no bad sector in flash memory is effectively utilized for data storage, and utilization ratio of flash memory is improved.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a method for utilizing flash memory. Background technique [0002] Flash memory (Flash Memory, Flash), as a non-volatile semiconductor memory chip, can store data for a long time without current supply, while volatile memory (such as DDR, SDRAM or RDRAM) only needs to stop the current supply, the data cannot be saved. Therefore, flash memory has become the basis of storage media for various portable digital devices, and is widely used in digital TVs, digital camcorders, mobile phones, digital cameras, PDAs (Personal Digital Assistant, PDA), game consoles, MP3 players, etc. middle. [0003] The flash memory is composed of many blocks (block), each block (block) includes 64 pages (page), and each page (page) includes 4 sectors (sector). The writing operation of the flash memory must be performed in a blank area. If there is data in the target area, it must be erased first and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C16/06
Inventor 范勤
Owner SHENZHEN CHIPSBANK TECH
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