SEMICONDUCTOR MEMORY DEVICE OUTPUTTING READY BUSY SIGNAL AND MEMORY SYSTEM INCLUDING THE SAME

摘要

A semiconductor memory device according to an embodiment of the present invention is configured to control memory cells, operates in a first mode capable of communicating with an external device when the chip select signal is enabled, and communicates with the external device when the chip select signal is disabled. a peripheral circuit operating in a non-communicating second mode, and a ready busy signal generator configured to bias the ready busy line according to whether the peripheral circuit has a ready or busy state when the chip select signal is enabled. .