SEMICONDUCTOR MEMORY DEVICE AND METHOD OF OPERATING THE SAME

PURPOSE: A semiconductor memory device and a method of operating the same are provided to operate only a necessary page buffer by inputting a control signal to pages buffers respectively. CONSTITUTION: In a semiconductor memory device and a method of operating the same, a first phase buffer block(140) comprises first to fourth PB(141~144). A logic group(180) comprises a control logic(181), a group selection logic(182) and a register(183) The control logic outputs a control signal and a page buffer control signal. The group selection logic transfers page buffer control signals to a PB group.