A hardware device, inserted in a universal serial bus port of a computing device, is detected. A counter is set to an initial value of one. In response to determining that one or more device descriptors associated with the hardware device are not received by the computing device within a predetermined time period, the hardware device is prevented from discharging a high-voltage charge into the computing device by inhibiting the hardware device from storing the high-voltage charge in a capacitor of the hardware device.

Provided are a terminal, a terminal peripheral, a signal transmission system, and a signal sending and receiving method. The terminal includes: a first audio module, which is connected to the USB receptacle in a terminal through an I2S bus channel and is configured to send a signal to be sent to a USB receptacle; the USB receptacle is configured to provide a physical connection interface between the terminal and a terminal peripheral.

The present invention discloses a display driver board with multiple TYPE-C full-function interfaces, including a first TYPE-C interface and a second TYPE-C interface, where the two TYPE-C interfaces are connected to a first connection device, a second connection device, a PD power control circuit, a protocol chip, a display signal processing circuit, and a USB HUB chip, respectively; the PD power control circuit is connected to a system power supply and the protocol chip; and the protocol chip is connected to forward/reverse insertion control signal ends of the first and second SWITCH chips, respectively.

A mode switching system including a first electronic device and the second electronic device is provided. The first electronic device includes a main control unit, a USB Type-C interface controller and a USB hub. The interface controller is coupled to the main control unit. The USB hub is coupled to the interface controller. The second electronic device is coupled to the interface controller of the first electronic device. The main control unit is configured to: (1) disable the USB hub in response to a mode switching instruction; (2) switch the mode of the interface controller from a first mode to a second mode; (3) command the interface controller to re-communicate with the second electronic device.

A power-governing method is for a USB docking station. The USB docking station includes a connector, ports, output-monitoring circuits, and a control circuit. The connector connects to a master device and has a power supply channel. The ports connect to power-receiving devices. The output-monitoring circuits correspond to the ports. The output-monitoring circuits selectively connect the power supply channel to the corresponding ports. Each the output-monitoring circuit has an upper limit power value. Each the output-monitoring circuit obtains a current output power of the corresponding port. The output-monitoring circuit disconnects the connection between the corresponding port and the power supply channel when the current output power is greater than its upper limit power value. The control circuit has rated power values corresponding to the ports. The control circuit sets upper limit power values according to the rated power values, current output powers, and a power supply option of the master device.

An electronic device includes a connector (e.g., a USB connector), a first element configured to operate the connector as a host device connector, a second element configured to operate the connector as a peripheral device connector, and a third element configured to generate a first signal upon connection of the connector. The first signal is indicative of whether the device is to operate as a host device or a peripheral device.

An all-in-one computer includes a display, a Universal Serial Bus (USB) Type-C port, a plurality of USB Type-A ports, a USB hub, a demultiplexer, and a Power Delivery (PD) controller. The USB hub is coupled to the plurality of USB Type-A ports. The demultiplexer is coupled between the display, the USB Type-C port, and the USB hub. The PD controller is to control the demultiplexer and the USB hub to pass a display signal input to the USB Type-C port to the display and pass signals input to the USB hub from the plurality of USB Type-A ports to the USB Type-C port with a computing device coupled to the USB Type-C port.

A universal serial bus (USB) hub includes detection circuits for a D− and a D+ connection of a USB port and a control circuit. The control circuit is configured to disable, detection circuits, respective impedances. After disabling the respective impedances, the USB hub is further configured to detect, at the detection circuits, respective values from the D+ connection and the D− connection. The USB hub is further configured to, based upon the respective values, switch the USB port between a device port configuration and a host port configuration.

An image processing chip includes a first interface port, a second interface port, a first upstream facing port (UFP) physical layer module, a first configuration channel detection module, a second upstream facing port (UFP) physical layer module, a second configuration channel detection module, a display signal processing module, a USB signal processing module, an image signal output port and a USB signal output port.

A method of operating a system (1) having a first controller (2) to which a second controller (3) is connected, wherein the first controller (2) is connected via a data link (4) to the second controller (2) and exchanges data therebetween, and the first controller (2) is connected to the second controller (3) via a power link (5) and supplies the second controller (3) with power from a power source (7), characterized in that a sensor (8) of the first controller (2) is used to measure the current flow via the power link, and that the current flow is influenced by means of a load (13) of the second controller (3) for the purpose of data transmission between the two controllers (2 and 3) via the power link (5).