Data storage device and flash memory control method

摘要

A data storage device using a FLASH memory with replay-protected blocks. The storage space of the FLASH memory is divided into blocks and each block is further divided into pages. A controller is provided in the data storage device to couple to the FLASH memory. The controller manages at least one replay-protected memory block of the FLASH memory. The controller programs a success flag and a write count into a system block of the FLASH memory after the controller programs two pages into the at least one replay-protected memory block of the FLASH memory. The controller may perform a power restoration process based on the success flag of the system block or/and based on the amount of programmed pages of the at least one replay-protected memory block.

主权项

1. A data storage device, comprising:
a FLASH memory with a storage space divided into blocks, wherein each block is further divided into pages; and a controller coupled to the FLASH memory to manage at least one replay-protected memory block of the FLASH memory, wherein: the controller programs a success flag and a write count into a system block of the FLASH memory after the controller programs two pages into the at least one replay-protected memory block of the FLASH memory; during a power restoration process, the controller checks the amount of programmed pages of the at least one replay-protected memory block; and during the power restoration process, the controller ignores the last programmed page of the at least one replay-protected memory block when there is an odd number of programmed pages of the at least one replay-protected memory block.