Semiconductor memory device performing program operation and operating method of the semiconductor memory device

Abstract

A semiconductor memory device includes: a memory cell array including a plurality of memory cells; a peripheral circuit including a plurality of page buffers each performing an auxiliary verify operation and a main verify operation, which are used to program selected memory cells among the plurality of memory cells; and control logic for controlling the auxiliary verify operation and the main verify operation of the peripheral circuit. During the main verify operation, the control logic controls the peripheral circuit to selectively precharge sensing nodes of the plurality page buffers respectively corresponding to the selected memory cells, based on a result of the auxiliary verify operation.