Patent ID: 9740153
Date: 2017-08-22
CPC Classifications: G01V,G03G,G06F

Claim:
1. A power control device comprising: non-volatile memory that includes a function of externally outputting a logical state of a bit stored in a specific area as a state hold signal that indicates an ON/OFF state of a device function unit before a power cutoff; a controller that controls the ON/OFF state of the device function unit and also writes the ON/OFF state of the device function unit to the specific area of the non-volatile memory; a logic circuit that controls power supply to the controller on the basis of a logic level of the state hold signal from the non-volatile memory; and an acceleration detector that detects acceleration of the device function unit; wherein the controller, on the basis of an acceleration value detected by the acceleration detector, determines whether or not an earthquake occurred, and in a case of determining that an earthquake occurred, writes the occurrence of the earthquake to another specific area of the non-volatile memory different from the specific area, the non-volatile memory externally outputs a logical state of a bit stored in the other specific area as an earthquake detection signal that indicates whether or not an earthquake was detected, and the logic circuit conducts control to not supply power to the controller in a case in which the logic level of the earthquake detection signal from the non-volatile memory indicates that an earthquake was detected, even in a case in which the logic level of the state hold signal from the non-volatile memory indicates that the device function unit was in an ON state before the power cutoff.