SEMICONDUCTOR MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor memory device such as a flash memory device for obtaining a program verification voltage that is requested by a program verification operation without any charge loss when an operation mode changes from program operation to the program verification operation. SOLUTION: A charge sharing circuit 240 is provided while it is connected to the output of a high-voltage generator 180. The charge sharing circuit 240 performs charge sharing by the load capacitor of a word line with a program voltage that is supplied during program operation and a capacitor 115 of the charge sharing circuit 240 in response to a discharge enable signal DIS and lowers a word line voltage to a program verification voltage without any charge loss.