| 摘要 |
PROBLEM TO BE SOLVED: To provide an alarm apparatus with power consumption reduced, and particularly an alarm apparatus in which the power consumption of a microcomputer provided therein is reduced.SOLUTION: In a microcomputer provided in an alarm apparatus, the power supply or the power stop for a CPU or a detection unit having a sensor is conducted by a power gate controlled by a power gate controller. Moreover, the CPU is provided with a volatile storage unit and a nonvolatile storage unit, and the data of the volatile storage unit are saved in the nonvolatile storage unit before stopping the power supply to the CPU and the data of the nonvolatile storage unit are restored in the volatile storage unit after the power supply to the CPU. Thus, the power supply to the CPU or the detection unit can be stopped between the measurement periods, whereby the power consumption can be reduced as compared with the case of supplying the power all the time. |
