Flash memory controller, method and associated electronic device for managing priority of quality detection or garbage collection of block

A method of managing a flash memory module, wherein the flash memory module comprises a plurality of blocks, and the method comprises:

• when the flash memory module is powered on, reading data of a plurality of pages from a specific block in the flash memory module;
• decoding data in said plurality of pages;
• and
• when any page within said plurality of pages cannot be successfully decoded, sealing the specific block and raising a priority of quality detection or garbage collection of the specific block.

An electronic device, comprising:

• a flash memory module, comprising a plurality of blocks;
• and
• a flash memory controller, configured to access the flash memory module;
• wherein when the flash memory controller and the flash memory module are powered on, the flash memory controller reads data of a plurality of pages from a specific block in the flash memory module, and decodes data in said plurality of pages;
• and when any page within said plurality of pages cannot be successfully decoded, the flash memory controller seals the specific block and raises a priority of quality detection or garbage collection of the specific block.