MEMORY CONTROLLER, STORAGE DEVICE, AND MEMORY CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To obtain a memory controller capable of achieving data restoration even if data is lost in units of pages.SOLUTION: A memory controller comprises: a control unit determining a storage position in a nonvolatile memory for each unit data of a fixed data length to be written to the nonvolatile memory; a plurality of parity storage units; an access control unit selecting one parity storage unit on the basis of the storage position; and an XOR operation unit performing an XOR operation for every bit position using the unit data and the data stored in the selected parity storage unit, and storing an operation result in the selected parity storage unit. If the unit data is written to the nonvolatile memory and the number of input unit data reaches a predetermined number, the operation results of the XOR operations stored in the parity storage unit are written to the nonvolatile memory.