DATA CONTROL CIRCUIT AND SEMICONBDUCTOR MEMORY DEVICE USING THE SAME

摘要

PURPOSE: A data controlling circuit and a semiconductor memory device using the same are provided to prevent the level change of data in a global line by fixing either of a read-blocking signal or a write-blocking signal to a specific level regardless of the toggling state of a data mask signal. CONSTITUTION: A buffer part(10) generates four internal mask signals(IDQM<1:4>) by buffering four external mask signals(DQM<1:4>). A read-blocking signal generating part(12) generates a read-blocking signal in order to control the transmission of a reading data. A write-blocking signal generating part(14) generates a write-blocking signal in order to control the transmission of a writing data. The write-blocking signal generating part includes a bus-width signal generating part and a transmission controlling part.