Controlling memory device using group recovery times and method thereof

Abstract

A control device, for controlling an operation of a memory device, wherein the memory device includes a plurality of memory blocks, each of the memory blocks includes a plurality of memory cells, and each of the memory cells stores a bit-data. The control device comprises the following elements. A processor, for classifying the memory cells into a plurality of groups according to an erase count of each of the memory cells, the groups respectively correspond to a plurality of recovery times. A memory interface control circuit, coupled to the processor and the memory device, and the processor controls the memory device to perform a bit recovery operation through the memory interface control circuit. The processor selects one of the groups according to the recovery times, and performs the bit recovery operation on the bit-data of each of the memory cells in the selected group.