Semiconductor memory device having a plurality of low power consumption modes

摘要

A semiconductor memory device that decreases power consumption and increases performance. The semiconductor memory device includes a plurality of memory cells that undergo refreshing to maintain data. The semiconductor memory device includes a normal operation mode for performing normal operation with the memory cells, and a plurality of low power consumption modes for decreasing power consumption when the semiconductor memory device is in a standby state. The semiconductor memory device includes a mode setting circuit that sets one of the low power consumption modes.