Semiconductor memory device capable of stably setting mode register set and method therefor

摘要

A semiconductor memory device having a mode register set (MRS) includes: a decoding unit for decoding a plurality of address signals included in the MRS and outputting a plurality of decoded signals; and an output unit for outputting a plurality of configuration signals and activating one of the plurality of configuration signals in response to the plurality of decoded signals, wherein the output unit keeps its previous output signals if more than one of the plurality of decoded signals are activated.