Flash memory system and managing and collecting methods for flash memory with invalid page messages thereof

A technology of invalid data pages and flash memory, which is applied in memory systems, electrical digital data processing, memory architecture access/allocation, etc., can solve the problem of not being able to use it as a basis for judging the validity of said pages, reducing memory recovery efficiency, and consuming a considerable amount of memory space And other issues
CN102768644AActive Publication Date: 2012-11-07GENESYS LOGIC INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GENESYS LOGIC INC
Publication Date
2012-11-07

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Abstract

A flash memory system and managing and collecting methods for flash memory with invalid page messages thereof are described. When the valid data pages of the flash memory are changed to invalid data pages, a recording area is used to record the message of the invalid data pages to effectively collect the occupied space of the invalid data pages in the flash memory. Further, while garbage collecting step is performed, a block is rapidly selected according to the message of the recording area and the valid data pages in the selected block are correctly identified, copied and removed.
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Description

technical field

[0001] The present invention relates to a memory system and a method for managing and recovering invalid data page information of the memory, in particular to a flash memory system and a method for managing and recovering invalid data page information of the flash memory. Background technique

[0002] A flash memory is composed of multiple pages, and 64 pages or 128 pages are defined as a block, which is used as a storage unit of the flash memory. However, the characteristic of flash memory is that after a page is written into data, new data cannot be rewritten to the page immediately, and the block (block) where the page is located must be erased (erase) before continuing. The page is written with new data. However, the above method of erasing the block and then rewriting the data is quite time-consuming, so usually the update data to be written to the page is first written to another physical address corresponding to the same logical address.

[0003] For...

Claims

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