ELECTRONIC DEVICE

PROBLEM TO BE SOLVED: To provide an electronic device, capable of further accelerating power saving when the device is not a communicated state with a main device. SOLUTION: When a power-saving instruction is outputted (S106), a power control signal P is turned off, a receiving circuit 20 is turned to an off state (S108), and after the lapse of prescribed time T1, the signal P is turned on, the receiving circuit 20 is turned to an on state (S112), a 2nd control signal S2 is outputted (S114), and a clock signal C is stopped (S116). When reception is detected (S118), a clock signal C is driven (S120), and a wake instruction and a receiving signal R are notified to a body device 12 (S122). When reception is not detected (S118), while a prescribed time T2 has elapsed, processing is returned to the step (S108) for turning off the power control signal P.