| 摘要 |
<p>PURPOSE:To protect the stored contents of a memory and to keep the processing state of a processor by inhibiting the resetting operations of a memory part and the processor while the battery power is supplied to the processor after detection of the service interruption of an external power supply. CONSTITUTION:A power supply part 1 inputs an external power supply to supply the DC power to each part of a device, and a reset means 2 detects the voltage drop of the part 1 and resets each part of the device. A supply means 7 supplies the power of a battery 6 to a memory part 4 and a processor 5 when a detecting part 3 detects the service interruption of the external power supply. An inhibition means 8 inhibits the means 2 from resetting the part 4 and the processor 5 while the means 7 is supplying the power of the battery 6. Therefore other circuit parts are reset at service interruption of the external power supply. Then the part 4 and the processor 5 are never reset and can continue their working via the battery back-up power supply.</p> |
