Abstract: A method for accessing a flash memory includes: sending a write command and a set of corresponding data, wherein the data is for updating a part of contents of a first physical page, corresponding to a logical page, of a physical block in a flash memory; searching the physical block according to the write command for a second physical page that is allowed to be written; writing the data to the second physical page; and recording that the second physical page corresponds to the logical page.

Abstract: A method for managing a flash memory including a plurality of blocks is provided. Each block includes a plurality of sets of a first page and a second page configured in pair. In response to a request for writing target data into a target block, at least one cache block is selected from the blocks. The target data is then written into the first pages in the at least one cache block. When a write-back condition is established, the target data is written from the cache block back to the target block.

Abstract: A memory managing method for an electronic system is provided. The electronic system includes an auxiliary memory, and is capable of communicating with a flash memory including a plurality of blocks. Each of the blocks has a logical/physical address mapping relationship. The address mapping relationships are stored in a storage region in the flash memory. The memory managing method first determines whether the address mapping relationships stored in the storage region are correct. The address mapping relationships are copied from the storage region to the auxiliary memory when a determination result is affirmative.