SEMICONDUCTOR MEMORY DEVICE INCLUDING A CLOAKING MODE, AND AN OPERATION METHOD THEREOF

摘要

PURPOSE: A semiconductor memory device and an operation method thereof are provided to inform a memory controller of information about a clock in a memory device by outputting a clocking pattern through an inversion pin when the clocking mode is started.;CONSTITUTION: An inversion output circuit(210) outputs a clocking pattern during a clocking mode. In an inversion pin, an inversion output circuit is connected. A selecting unit(310) selectively outputs inversion information which is inputted in parallel or a cloaking pattern which is inputted in parallel to its own output terminal. A parallel-serial converting unit(320) serially aligns the output signal of the selecting unit. An output driving unit outputs an output signal of the parallel-serial converting unit to the inversion pin.;COPYRIGHT KIPO 2010