| 摘要 |
<p>PURPOSE: To expand a data area by eliminating the necessity of an address conversion table for data management. CONSTITUTION: This semiconductor disk device is provided with a flash memory 8A including plural erasing blocks each of which is constituted of a logical erasing block number storing area, plural data storing areas for storing data, plural data state flag areas capable of storing a data state flag expressing whether data are stored in each data storing area or not in each data storing area, and plural updating data relative information storing areas for storing relative information expressing the address of an updated destination in each data storing area; a CPU 4 for converting a logical sector address into a logical erasing block number and its offset value, retrieving a corresponding erasing block and a corresponding data storing area in the flash memory 8, and when relative information does not exist in a corresponding updating data relative information storing area, reading out the contents of the corresponding data storing area.</p> |
