| 摘要 |
<p>PURPOSE:To prevent the breakdown of data by delivering the corresponding information through a battery voltage checking circuit before it is impossible to hold the data stored in a memory owing to the drop of the battery voltage. CONSTITUTION:A battery voltage checking circuit 8 delivers an abnormal signal to a battery fault output terminal 9 when the voltage of a battery 5 has a drop of such a degree that disables the battery 5 to hold the data stored in a memory 3. An electronic device 7 receives said abnormal signal and detects a fault of a portable memory 6 to discontinue the subsequent data writing actions. This can prevent previously the breakdown of the data in the memory 3 and improves the reliability of the memory 6.</p> |
