| 摘要 |
PURPOSE:To exactly initialize a microcomputer, and to prevent a malfunction, by setting initializing terminal voltage to zero once even in case when a service interruption time is short. CONSTITUTION:When electric power supply terminal voltage Vcc rises and exceeds operating voltage VRON of a relay 7 at time t1, a relay contact 8 is switched. When initializing terminal voltage VR exceeds a specified value VST at time t2, a microcomputer starts to operate. At time t3, the electric power supply terminal voltage Vcc starts to drop due to service interruption, etc., and when it becomes reset voltage VROFF of the relay 7 of below at time t4, the relay contact 8 is returned to its original position, and the initializing terminal voltage VR becomes zero potential. At time t5, the electric power supply is reset, and when it exceeds the operating voltage VRON of the relay 7 at time t6, the relay contact 8 is switched, and the microcomputer starts to operate at time t7 in the same way as above. |
