MEMORY DEVICE, MEMORY CONTROLLER, AND MEMORY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a memory device, a memory controller, and a memory system which improve write characteristics.SOLUTION: A memory device of the invention comprises: a memory cell array that includes a plurality of volatile memory cell rows including weak cell rows and normal cell rows; a command decoder that receives a command; an address table that stores a plurality of weak cell row addresses for identifying corresponding weak cell rows; and a refresh control circuit that controls operation of the memory cell array to periodically refresh the plurality of volatile memory cell rows. In response to the command decoder receiving a write command for writing a weak cell row identified by a weak cell row address stored in the address table, the refresh control circuit causes a refresh operation of the weak cell row.