SEMICONDUCTOR MEMORY DEVICE, ITS OPERATING METHOD, ITS CONTROL METHOD, MEMORY SYSTEM, AND ITS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To make a semiconductor memory device having a low power consumption mode surely shift to the power saving mode and to release it from the low power without fail. SOLUTION: This semiconductor memory device has an entry circuit 1 and an inner voltage generator circuit 2. The inner voltage generator circuit 2 generates an inner voltage to supply it to a predetermined inner circuit 4 when activated. The inner voltage generator circuit 2 consumes a predetermined amount of power when working. The entry circuit 1 deactivates the inner voltage generator circuit 2 when receiving a predetermined signal from the outside. By deactivating the inner voltage generator circuit 2, the inner voltage is no longer generated reducing the power consumption. Accordingly, the chip is easily shifted to a low power consumption mode with the control signal from the outside. COPYRIGHT: (C)2007,JPO&INPIT