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A control method of over-temperature protection, a driver chip and a control system of over-temperature protection are disclosed. The control method includes the following steps: a driver chip provides an output voltage to drive a DC fan. A temperature of the driver chip is detected by an over-temperature detection module. When the temperature of the driver chip is higher than a first threshold value, the power supplying to the driver chip is stopped, so that the driver chip can cool down. After the temperature of the driver chip is lower than a second threshold value, the driver chip is restarted. A preset voltage is provided to the DC fan by the driver chip and the DC fan rotates at a preset rotational speed which is higher than the rotational speed.


Patent
Nuvoton Technology Corporation | Date: 2016-05-18

A computer status diagnosis chip and a computer status diagnosis system including the same are provided. The chip is connected with the computer chip set and the first audio generator, and includes a receiving unit, an audio encoder and a driving unit. The receiving unit receives a detection signal from the computer chip set, and the audio encoder is connected to the receiving unit and encodes the detection signal as a first audio signal. The driving unit drives the first audio generator according to the first audio signal. By acoustic wave, the first audio generator transmits the first audio signal to a first audio receiver. Upon receipt of the first audio signal, an application program installed in the smart device is used to decode the first audio signal to obtain the detection signal, and a computer status is displayed on the smart device.


Patent
Nuvoton Technology Corporation | Date: 2016-05-05

A master electronic device used to perform communication with a slave electronic device is provided. The master electronic device includes a power module, an input and output (I/O) module, a processing module, a sample and hold module and a control module. The power module outputs power having a default operation voltage. The I/O module operates according to the power having the default operation voltage. The processing module controls the I/O module to generate and transmit a command signal to the slave electronic device. The sample and hold module receives and samples a response signal from the slave electronic device. The control module determines a slave operation voltage according to a high state voltage level of the response signal, so as to further control the power module to generate power having the slave operation voltage such that the I/O module operates accordingly.


Patent
Nuvoton Technology Corporation | Date: 2016-07-12

A switch-scanning circuit includes a chip and switching units. The chip includes pins having an output operation mode and an input operation mode, and a processing unit. The processing unit sets one of the pins as an input pin and the rest of the pins as output pins sequentially according to a clock signal, uses a scan signal to provide different voltages to the output pins, and then determines states of button switches according to a voltage of the input pin. The switching unit includes a power source resistance, switches and resistors. A first terminal and a second terminal of the power source resistance are electrically connected to a power source and a first pin respectively. The resistors have terminals electrically connected the first pin and terminals of the switches. The other terminals of the switches are connected to the pins other than the first pin.


Patent
Nuvoton Technology Corporation | Date: 2016-06-21

Apparatus for authentication of system memory content, the apparatus operative in conjunction with system memory storing content (code or non-code) utilized by a CPU, the apparatus comprising cache memory and an authentication module configured to use free time over a memory interface defined between the system memory and the cache memory, for authentication of content stored in the system memory, including use of at least one signature stored on the system memory to authenticate the content.


Patent
Nuvoton Technology Corporation | Date: 2016-12-02

The present disclosure illustrates a dual-mode regulator circuit comprising: a first output terminal; a second output terminal; a switching regulator circuit coupled to the first output terminal and comprising a first transistor coupled between the first output terminal and ground; a linear regulator circuit coupled to the second output terminal and comprising a second transistor coupled between the second output terminal and a power source; a detection circuit configured to turn on the first transistor in order to connect the first output terminal to ground, turn on the second transistor in order to connect the second output terminal to the power source, and then generate a detection signal indicating whether an inductor is connected between the first and second output terminals; and a logic circuit configured to activate the switching regulator circuit or the linear regulator circuit according to the detection signal.


Patent
Nuvoton Technology Corporation | Date: 2016-08-25

An unmanned aerial vehicle operator identity authentication system is provided, including a flight control module and a license certificate module connected with each other. The flight control module includes a first encryption and decryption unit for generating a random number code, and a first storage unit for storing a license register table. The license certificate module includes a second storage unit for storing a license certificate identifier, and a second encryption and decryption unit for encrypting the received random number code and the license certificate identifier, and transmitting the encrypted data to the first encryption and decryption unit. After decryption, if the first encryption and decryption unit determines that the decrypted random number code is the same as the original random number code, and the decrypted license certificate identifier exists in the license register table, the operator identity authentication is completed and the UAV can be actuated.


Patent
Nuvoton Technology Corporation | Date: 2017-01-04

A reference voltage circuit is provided, which includes bandgap reference circuit, bias current generator, first capacitor, second capacitor, comparator and control logic circuit. In the active mode of the control logic circuit, the control logic circuit controls the bandgap reference circuit to deliver bandgap reference voltage. The comparator transmits first comparison signal to control logic circuit when the first and second capacitors are charged to the bandgap reference voltage. The control logic circuit enters low power mode and controls the bandgap reference circuit to stop delivering the bandgap reference voltage. If the comparator detects the potential difference between the first capacitor and second capacitor exceeds the threshold value, the control logic circuit returns to active mode according to the second comparison signal transmitted form the comparator.


Patent
Nuvoton Technology Corporation | Date: 2016-03-21

An apparatus includes an interface and a processor. The interface is configured for communicating over a bus. The processor is configured to disrupt on the bus a transaction in which a bus-master device attempts to access a peripheral device without authorization, by forcing one or more dummy values on at least one line of the bus in parallel to at least a part of the transaction.


Patent
Nuvoton Technology Corporation | Date: 2016-04-21

A function programmable circuit and an operation method thereof are provided. The function programmable circuit includes a micro-controller unit (MCU) and a field programmable gate array (FPGA). The FPGA is coupled to the MCU, and is capable of being configured to execute a first function and work with the MCU in a first period, while the FPGA is being programmed a second function by the MCU in the same first period. The FPGA is controlled by a function switch pulse output from the MCU to terminate the first period, and switched from the first function to the second function, and then executes the second function and works with the MCU in a second period.

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