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Data storage method and system based on NOR FLASH

A data storage and data technology, applied in the field of data storage methods and systems based on NOR FLASH, can solve problems such as affecting the service life of NORFLASH, waste of storage space, etc., and achieve the effect of reducing the number of times and increasing the service life

Inactive Publication Date: 2014-06-25
广州市泰斗电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the storage area is too large, the storage space will be wasted.
If the storage area is too small, it will lead to frequent block erase and write operations, which will affect the service life of NOR FLASH

Method used

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  • Data storage method and system based on NOR FLASH
  • Data storage method and system based on NOR FLASH
  • Data storage method and system based on NOR FLASH

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Experimental program
Comparison scheme
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Embodiment Construction

[0021] The solution of the present invention will be described in detail below in combination with the preferred embodiments thereof.

[0022] Table 1 shows the way of defining data blocks in the prior art, and each block represents a data block. (Note that the data block mentioned here is a different concept from the FLASH block mentioned above. The data block is a logical concept, while the FLASH block is an actual physical concept.) A data block holds a data item. A data block generally consists of the following three parts, as shown in Table 1:

[0023] Table 1 Structure of a data block containing a single data item

[0024]

[0025] Generally, when data is stored, if it is determined that it is not the first write, the valid flag of the currently valid data block is marked as invalid, and the new data block is written into the FLASH, and then the new data block is set as the currently valid data block, and mark its data block valid flag as a valid state. However, if...

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Abstract

The invention discloses a data storage method based on NOR FLASH. The method comprises the steps of obtaining position information of data items required to be updated in a data block, changing an effective sign corresponding to the data items in the data block into ineffective sign according to the position information of the data item, enabling the data items required to be updated to form a new data block, writing the new data block in the FLASH again, and updating the position information of the current effective data items in the FLASH. According to the data storage method based on the NOR FLASH, the frequency of the block erasing operation can be reduced, and the service life of the NOR FLASH hardware is prolonged. Meanwhile, the invention further discloses a data storage system based on the NOR FLASH.

Description

technical field [0001] The invention relates to the field of hardware data processing, in particular to a NOR FLASH-based data storage method and system. Background technique [0002] NOR FLASH is one of the main non-volatile flash memory technologies currently on the market. NOR FLASH has high transmission efficiency and is very cost-effective in a small capacity of 1-4MB, but the very low writing and erasing speed greatly Affecting its performance, NOR FLASH can be erased and written 100,000 times. EEPROM is an electronically erasable read-only memory. It is a non-volatile memory. After the power supply disappears, the stored data still exists. To delete the content stored in it, you can directly delete it with an electronic signal. The erasing times of EEPROM Yes a million times. From the characteristics of NOR FLASH and EEPROM, it can be seen that there is a big gap between the erasing life of the two. [0003] As a permanent storage medium that does not lose data whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/02G06F3/06
Inventor 唐敬
Owner 广州市泰斗电子科技有限公司