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Logic block management method for flash memory as well as control circuit and storage system thereof

A technology for flash memory and memory management, which is applied in the field of flash memory control circuits and flash memory storage systems, and can solve problems such as shortened life of flash memory storage devices

Active Publication Date: 2013-01-09
PHISON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the erasing times of the physical block are limited (for example, the physical block will be damaged after being erased 10,000 times), so under the condition of frequently erasing the physical block, the lifetime of the flash memory storage device will be reduced. greatly shortened

Method used

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  • Logic block management method for flash memory as well as control circuit and storage system thereof
  • Logic block management method for flash memory as well as control circuit and storage system thereof
  • Logic block management method for flash memory as well as control circuit and storage system thereof

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Embodiment Construction

[0037] figure 1 It is a schematic block diagram of a flash memory storage system shown in an embodiment of the present invention.

[0038] Please refer to figure 1 Generally, the flash memory storage device 100 is used together with the host system 200 so that the host system 200 stores data into the flash memory storage device 100 or reads data from the flash memory storage device 100 . In this embodiment, the flash memory storage device 100 is a solid state drive (SSD for short). However, it must be understood that in another embodiment of the present invention, the flash memory storage device 100 may also be a memory card or a pen drive.

[0039]The flash memory storage device 100 includes a flash memory controller (also called a flash memory control circuit) 110 , a connector 120 and a flash memory chip 130 .

[0040] The flash memory controller 110 executes a plurality of logic gates or control instructions implemented in hardware or software, and writes, reads, and er...

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Abstract

The invention discloses a logic block management method for a flash memory as well as a control circuit and a storage system thereof. The logic block management method is used for managing a plurality of logic blocks of one flash memory storage device. The logic block management method comprises the following steps of: providing a flash memory controller, and grouping the logic blocks into a plurality of logic areas, wherein each logic block corresponds to one of the logic areas; counting a use frequency value for each logic block, and dynamically regulating the correspondence between the logic blocks and the logic areas by the flash memory controller according to the counted number value of uses. Thus, the logic block management method can effectively use the logic areas to recognize thelogic blocks with different use modes, and further uses different mechanism to write date to increase the efficiency of the flash memory storage device.

Description

technical field [0001] The invention relates to a logical block management method for a flash memory, a flash memory control circuit and a flash memory storage system using the method. Background technique [0002] Digital cameras, mobile phones, 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 suitable for portable applications and is most suitable for such portable products powered by batteries. A solid state drive is a storage device that uses NAND flash memory as a storage medium. [0003] Generally, a flash memory module in a flash memory storage device will have multiple physical blocks, and these physical blocks will be logically grouped into system areas by the flash memory controller of the flash memory storage device. area), data area (data area), spare ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/06
Inventor 叶志刚
Owner PHISON ELECTRONICS
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