| 摘要 |
PURPOSE:To provide a data processor at the time of service interruption for detecting exactly a fact that storage data stored in a volatile storage means becomes unreadable due to a service interruption, or a fact that, even if it remains satisfactorily at the time when a power source is restored, a service interruption time exceeding the prescribed time is precisely detected, and executes sure erasure of the storage data only when one condition thereof is satisfied. CONSTITUTION:The data processor is provided with a timepiece IC 15 operated even at the time of service interruption by a backup power source 16, and a processing means 13 for receiving a service interruption signal inputted from the outside at the time of service interruption and writing prescribed identification data in a storage means 12, erasing storage data, in the case the identification data cannot be read out of the storage means 12, when a power source is restored, and erasing the storage data only when the counting value of the timepiece IC 15 exceeds a prescribed time, in the case the identification data can be read out. |
