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Multi level cell NAND flash storage system as well as controller and access method thereof

A multi-layer storage unit, flash controller technology, applied in static memory, read-only memory, information storage and other directions, can solve the problem of unable to support MLCNAND type flash memory chip memory module and so on

Active Publication Date: 2010-08-25
EMTOPS ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the above reasons, although memory module manufacturers have provided a large number of memory modules using MLC NAND flash memory chips, host systems that only support SLC NAND flash memory chips will not be able to support the new generation of memory modules using MLC NAND flash memory chips

Method used

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  • Multi level cell NAND flash storage system as well as controller and access method thereof
  • Multi level cell NAND flash storage system as well as controller and access method thereof
  • Multi level cell NAND flash storage system as well as controller and access method thereof

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Embodiment Construction

[0061] FIG. 2 is a schematic block diagram illustrating a flash memory storage system according to an exemplary embodiment of the present invention.

[0062] Referring to FIG. 2 , the flash memory storage system 200 is a storage system that uses multi-level memory cell (Multi Level Cell, MLC) NAND flash memory to store data. In particular, the flash storage system 200 will announce to the host system 290 connected to it that it is a single-level storage unit (Single Level Cell, SLC) NAND flash memory chip, so the host system 290 can manage SLC NAND flash memory according to the way Access the flash memory storage system 200 . Here, the host system 290 is an electronic device (such as a mobile phone, a personal digital assistant, an MP3 player, etc.) using a NAND flash memory module as a storage medium. In another embodiment, the host system 290 further includes an SLC flash memory controller (not shown).

[0063] The flash storage system 200 includes a connector 210 , a flas...

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Abstract

The invention relates to an MLC (Multi Level Cell) NAND flash storage system. A controller of the storage system declares that the controller is an SLC (Single Level Cell) NAND flash storage chip to a host system connected to the controller and provides a plurality of SLC logic blocks to the host system. Moreover, when the controller receives a write instruction and user data to be written from the host system, the controller writes the user data into a page of an MLC logic block and records a page of the SLC logic block, which corresponds to the page of the MLC logic block with the user data being written; when the controller receives an erase instruction from the host system, the controller writes preset data in a page of an MLC physical block corresponding to the SLC logic block to be erased, wherein the preset data have the same form to the erased page.

Description

technical field [0001] The present invention relates to a multi-flash storage system, and in particular to a multi-level storage unit (Multi Level Cell, MLC) used to emulate a single-level storage unit (Single Level Cell, SLC) NAND flash memory chip A NAND flash memory storage system, its flash memory controller, and an access method for simulating MLCNAND flash memory chips into SLC NAND flash memory chips. Background technique [0002] Electronic products such as digital cameras, cell phone cameras, and MP3 players have grown rapidly in recent years, making consumers' demand for storage media also increase rapidly. Because flash memory (Flash Memory) has the characteristics of data non-volatility, power saving, small size and no mechanical structure, it is most suitable as a storage medium for such portable and battery-powered electronic products. A memory card is a storage device that uses a NAND flash memory chip as a storage medium. Due to its small size, large capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C16/02G11C16/08G06F12/02
Inventor 朱健华叶志刚陈国荣
Owner EMTOPS ELECTRONICS CORP
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