| 摘要 |
The invention provides a data access method for a flash memory. First, a write command, a write address, and target data are received from a host. A target block corresponding to the write address is then determined. Whether a storage space with the write address in the target block stores data is then determined. When the storage space does not store data, the target data is written to the storage space of the target block. When the storage space stores data, whether a file allocation table (FAT) block mapped to the target block exists in the flash memory is then determined. When the FAT block exists, the target data is written to the FAT block. When the FAT block does not exist, whether a child block mapped to the target block exists in the flash memory is determined. When the child block exists, the target data is written to the child block. |
