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Electronic data flash memory fasten with flash memory bad blocks control system

A technology of electronic data, flash memory controller, applied in the field of electronic data flash memory card

Inactive Publication Date: 2008-02-06
INFOMICRO ELECTRONICS (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system and method must address the processing time required to process bad blocks, garbage collection, and search for available good blocks during wear leveling

Method used

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  • Electronic data flash memory fasten with flash memory bad blocks control system
  • Electronic data flash memory fasten with flash memory bad blocks control system
  • Electronic data flash memory fasten with flash memory bad blocks control system

Examples

Experimental program
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Embodiment Construction

[0057] Referring to Fig. 1, according to the embodiment of the present invention, electronic data flash memory card 10 can be accessed by external computer (host) 9 through interface bus 13, card reader 12 or other interface mechanism (not shown), electronic data flash memory card 10 includes Card body 1 , processing unit 2 , one or more flash memory devices 3 , fingerprint sensor 4 , input / output interface circuitry 5 , optional display unit 6 , optional power source (eg battery) 7 , optional function keys 8 .

[0058] The flash memory device 3 is mounted on the card body 1 and stores one or more data files, reference passwords and reference fingerprint data obtained by scanning one or more authorized user fingerprints of the electronic data flash memory card 10 in a known manner. Only authorized users can access the stored data files. The data file can be a picture file or a text file.

[0059] The fingerprint sensor 4 is installed on the card body 1, and generates fingerpr...

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PUM

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Abstract

The invention discloses an electronic data flash card accessed by a host computer, composed of flash controller connected with the flash device and input-output interfce circuit. The flash communicates with the host computer using USB interfce circuit. The flash controller comprises an arbitrator for establishing mapping between the logical address and physical bolck address and performing block administrative operation, wherein the block administrative operation comprises: storing the redistributed data in usable block, rearranging the effective data in expired block to the said usable block and resetting the effective data to the usable block and then erasing the expired block to recovery and erasing number loss balance of block. In addition, each flash device is provided with internal buffer for accelerating the block administrative operation.

Description

technical field [0001] This invention relates to electronic data flash memory cards, and more particularly to electronic data flash memory cards with flash block control systems for flash memory devices. Background technique [0002] Confidential data files are often stored on floppy disks or transmitted over networks that require passwords or secure encryption. Confidential documents are sent under a secure seal. However, passwords, encryption, and security seals are all likely to be broken (decrypted), thereby posing dangers to confidential data files and confidential documents, resulting in unauthorized access to confidential information. [0003] As flash memory technology becomes more advanced, flash memory is gradually replacing traditional disk as a storage medium in mobile systems. Flash memory has some significant advantages over floppy or magnetic media hard disks: high impedance and low power dissipation. Due to the small physical size of flash memory, it is mo...

Claims

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Application Information

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IPC IPC(8): G11C7/10G11C16/00
Inventor 马治刚李中和俞一康李威若沈明祥
Owner INFOMICRO ELECTRONICS (SHENZHEN) CO LTD
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