Wordline enable circuit in semiconductor memory device and method thereof

A semiconductor memory device for activating plural wordlines, comprising:

• a wordline control signal generating unit for outputting an untoggled wordline control signal based on a wordline select check signal, a self-refresh mode signal and a toggled wordline control signal while a unit wordline block is enabled in a self-refresh mode;
• a wordline enable signal generating unit for generating a wordline enable control signal, controlled by the untoggled wordline control signal and a toggled address signal, and a first to an n-th wordline enable power supply signals, controlled by the toggled wordline control signal and each address signal;
• and
• a wordline block enable unit for enabling each wordline, controlled by the wordline enable control signal and the first to the n-th wordline enable power supply signals.