Memory controller including row hammer tracking device

Abstract

A memory controller includes a command/address generation module; and a row-hammer tracking module configured to track a row-hammer address based on an active command and an address for a target bank and a target row indicated by the active command, the active command and the address being received from the command/address generation module, wherein the row-hammer tracking module includes: a plurality of storage devices each including fields corresponding to banks, each of the fields storing candidate addresses and access counting values for the candidate addresses; and at least one search controller configured to sequentially search, according to a clock, fields of the plurality of storage devices corresponding to the target bank when the active command is input, and search, during one clock, fields of the plurality of storage devices corresponding to different banks based on active commands indicating the different banks.