| 摘要 |
<p>PURPOSE:To attain stable operation, by applying a reset input to a microcomputer system without fail even at momentary power failure. CONSTITUTION:When a power failure is detected at a power supply detection circuit 1, the microcomputer system 2 executes the program at power failure detection. After a time required for the system 2 to execute the program at the detection of stop with a delay circuit 5, the power failure detection signal is applied to a flip-flop 6 and reset, and the output discharges charges of a capacitor 4 connected to a reset input terminal 2b of the microcomputer system 2 through a resistor 8 with a driver 7 momentarily. Thus, even at the momentary power failure, the charge in the capacitor 4 is discharged without fail, and a reset input is inputted to a reset input terminal 2b of the microcomputer system 2.</p> |
