Reset circuit
AssigneeHon Hai Precision Industry Co., Ltd.
InventorMing-Chih Hsieh
Life of this patent
Estimating the term…
Abstract
A reset circuit includes two voltage dividing circuits, a switching circuit, a selection button, two voltage converters, and a processor. The voltage converters convert a first or second power supply for supplying power to the processor. When the first power supply supplies power to the processor the processor operates normally. When the second power supply supplies power to the processor, one of the voltage dividing circuits outputs a signal to the processor to restore an electronic device to factory settings according to the signal.
Claims2
A reset circuit set in an electronic device for restoring the electronic device to factory settings, the reset circuit comprising:
- a single-pole-double-throw selection button, wherein a first terminal of a pole of the selection button is connected to a first power supply or a second power supply;
- a first voltage converter, wherein an input terminal of the first voltage converter is connected to a first contact of the selection button;
- a second voltage converter, wherein an input terminal of the second voltage converter is connected to a second contact of the selection button and an output of the first voltage converter;
- a processor connected to an output terminal of the second voltage converter;
- a first voltage dividing circuit;
- a second voltage dividing circuit connected to the first voltage dividing circuit and the processor;
- and
- a switching circuit connected between the first and second voltage dividing circuits;
- wherein when a second terminal of the pole is connected to the first contact of the selection button and the first terminal of the pole is connected to a first power supply, the first and second voltage converters convert a voltage from the first power supply to supply power for the processor, the first voltage dividing circuit turns on the switching circuit to make the second voltage dividing circuit output a first signal to the processor;
- when the second terminal of the pole is connected to the second contact of the selection button and the first terminal of the pole is connected to a second power supply, the second voltage converter converts a voltage from the second power supply to supply power for the processor, the first voltage dividing circuit turns off the switching circuit to make the second voltage dividing circuit output a second signal to the processor, and the processor restores the electronic device to factory default settings according to the second signal.
Dependencies are inferred from the claim text.