FLASH MEMORY CONTROLLER DIVIDING ENDURANCE INTO STAGES

摘要

PURPOSE: A flash memory control device for classifying endurance into multiple steps is provided to implement a wear leveling of blocks evenly by storing time information in which a flash memory operates in a busy state and by using endurance information of a block of the flash memory. CONSTITUTION: A flash memory control device for classifying endurance into multiple steps comprises the following steps: a time information storage unit (110) accumulates/stores in order a busy time in which a flash memory (300) operates in a busy state in order to perform a writing or an elimination command by corresponding to blocks of the flash memory; an endurance administration unit (130) classifies endurance of the blocks of the flash memory into multiple steps based on the busy time; and the endurance administration unit determines that a spot, in which a change amount of the busy time accumulated in the time information storage unit is over a critical, is a spot which changes a step of the endurance. [Reference numerals] (110) Time information storage unit; (120) Number information storage unit; (130) Endurance administration unit; (200) Host; (300) Flash memory