Semiconductor memory device including write driver control circuit and write driver control method

Abstract

A write driver control circuit controls operations of a write driver, which amplifies and transmits data of a pair of global input/output lines to a pair of local input/output lines in a write operation. A single type latch section compares states of first and second data of the pair of global input/output lines differentially inputted in a first status and then outputs a first output signal to a first output node; compares states of the first and second data differentially inputted in a second status and then outputs a second output signal to a second output node; and continuously latches states of the first and second output nodes before a precharge operation starts. A precharge controller equalizes and precharges the first and second output nodes in the precharge operation. An output section outputs first and second driver signals and first and second latch signals to control the write driver.