SEMICONDUCTOR STORAGE DEVICE

摘要

PURPOSE: To reduce power consumption of a semiconductor storage device formed by hierarchizing an isolation signal generation circuit which adopts a shared sense amplifier system into a main isolation signal generation circuit and a sub isolation signal generation circuit and devises electric disconnection between a cell array and a sense amplifier. CONSTITUTION: The electric potential of a high electric potential side between main isolation signal MIS1 and MIS2 is defined as external power supply potential VDD, and the electric potential of a high electric potential side between sub isolation signals SIS1 and SIS2 is defined as boosted electric potential VPP obtained by boosting the external power supply potential VDD.