The principle of chip data storage is that the unit in sram is a number of switches to form a trigger, which can stably store 0,1 signals, and can change the stored value through timing and input signals.
dram, mainly according to the power on the capacitor, when the power is large, the high voltage means 1, and the other means 0. The chip is composed of a large number of these units, so it can store data.