Electronic device capable of reducing power consumption in power saving mode without degrading waveform quality, and operation control method

Abstract

An electronic device includes a substrate, a plurality of DRAMs, and a transition processing portion. The substrate includes a power supply layer adjacent to a wiring layer. The plurality of DRAMs are capable of transitioning from a first state in which data can be held to a second state in which data cannot be held and that consumes less power than the first state, and receive power from the power supply layer. The transition processing portion, in a case where an operating mode of the electronic device moves from a normal mode to power saving mode that consumes less power than the normal mode, stores return data used when returning to the normal mode in part of the plurality of DRAMs, and causes each of the DRAMs in which the return data is not stored to transition from the first state to the second state.