POWER SUPPLY CONTROL OF STORAGE DEVICE

摘要

PURPOSE:To perform processing in a high speed by releasing a switch element from self-holding and cutting off the power supply at the time of completion of rewrite that is applied to a storage device holding a DC power supply unit in the operating state by on-switch and carrying out rewrite of the storage device by off-switch. CONSTITUTION:An SW1 is turned on to emit an LED1 and a hot-triac PTRICA is eleclrically conducted. Thereby a power supply device 1 is operated and its DC output voltage Vcc being supplied to a storage device 2, at the same time, resets an FF, sets the output of an inverter INV to L level, emits an LED2 and thereby the device 1 is kept in the operation state even when the SW1 is turned off. Then, the device 1 turns a power supply SW2 on to the device 2 to which the power supply is applied, gives an interruption signal and makes the device 2 rewrite the information of control. After that the device 2 sends a set command to the FF, the output of the invertor INV is set to H level, turning LED2, cutting off the PTRIAC disabling the device 1.