Method, device and equipment for storing bad block information of flash memory

A bad block information and storage device technology, applied in the storage field, can solve problems such as long test time, affecting normal mass production efficiency, and cost
CN110471791APending Publication Date: 2019-11-19SHENZHEN DEMINGLI ELECTRONICS
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SHENZHEN DEMINGLI ELECTRONICS
Publication Date
2019-11-19

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Abstract

The invention discloses a method, a device and equipment for storing bad block information of a flash memory. The method comprises the following steps: adding a one-time programmable storage space into a main control chip of the flash memory, storing a bad block information table of the flash memory into the one-time programmable storage space, and searching the bad block information table from the one-time programmable storage space for re-production of the flash memory when the flash memory needs to be re-produced. By means of the mode, the bad block information table can be found in the one-time programmable storage space under the condition that it can be guaranteed that the bad block information table is lost in flash memory data. The time for rewriting, reading, checking and reconstructing the bad block information table for all blocks of the flash memory when mass production is conducted on the flash memory again can be saved.
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Description

technical field

[0001] The invention relates to the field of storage technology, in particular to a storage method, device and equipment for bad block information of a flash memory. Background technique

[0002] The production process of NAND Flash (flash memory, referred to as flash memory) determines that there are original bad blocks when NAND Flash leaves the factory, and new bad blocks will be generated during the use of NAND Flash due to the erasing and writing times reaching the end of life. Bad block information is usually identified by software through algorithmic scanning during the flash memory production process, and then the good and bad status of all blocks is formed into a bad block information table and stored in NAND Flash. When the software of the main control chip of the flash memory needs to be upgraded, it is necessary to read the bad block information table first, and then perform resource allocation for the storage management algorithm according to the...

Claims

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