Abstract: Embodiments of methods of communications, communications devices, and redrivers are disclosed. In an embodiment, a method of communications involves enabling a Loss of Signal (LOS) detector and a Low Frequency Periodic Signaling (LFPS) detector connected to a communications channel, using a digital logic circuit, combining an output of the LOS detector and an output of the LFPS detector to generate a combined LFPS output, and outputting the combined LFPS output and the output of the LOS detector to control data communications through the communications channel.

Abstract: A redriver includes a plurality of channels coupled to an interface, a number of detectors coupled to the plurality of channels, and a controller that determines an orientation of the interface based on states detected by the number of detectors. The controller determines that the interface is in a first orientation when a first combination of states is detected for the plurality of channels, and determines that the interface is in a second orientation when a second combination of states is detected for the plurality of channels.

Abstract: Embodiments of bidirectional repeaters and communications systems are disclosed. In an embodiment, a bidirectional repeater includes a digital state machine configured to control the bidirectional repeater to operate under a functional mode or under a bypass mode and a bypass mode driver configured to automatically detect a direction of signal through input/output (I/O) terminals of the bidirectional repeater and to allow a signal to pass through the bidirectional repeater based on the direction of signal under the bypass mode.

Abstract: Embodiments of methods of communications, communications devices, and redrivers are disclosed. In an embodiment, a method of communications involves enabling a Loss of Signal (LOS) detector and a Low Frequency Periodic Signaling (LFPS) detector connected to a communications channel, using a digital logic circuit, combining an output of the LOS detector and an output of the LFPS detector to generate a combined LFPS output, and outputting the combined LFPS output and the output of the LOS detector to control data communications through the communications channel.

Abstract: A redriver chip includes a controller and a plurality of circuits coupled to the channel. The controller adjusts a set of parameters of the plurality of circuits to have first values during a first mode of operation and second values during a second mode of operation. The first values generate a first level of power consumption during the first mode of operation, and the second values generate a second level of power consumption during the second mode of operation. The first level of power consumption is lower than the second level of power consumption, and the first mode of operation corresponding to a low-power mode of the redriver chip.

Abstract: A redriver chip includes a controller and a plurality of circuits coupled to the channel. The controller adjusts a set of parameters of the plurality of circuits to have first values during a first mode of operation and second values during a second mode of operation. The first values generate a first level of power consumption during the first mode of operation, and the second values generate a second level of power consumption during the second mode of operation. The first level of power consumption is lower than the second level of power consumption, and the first mode of operation corresponding to a low-power mode of the redriver chip.

Abstract: A redriver includes a plurality of channels coupled to an interface, a number of detectors coupled to the plurality of channels, and a controller that determines an orientation of the interface based on states detected by the number of detectors. The controller determines that the interface is in a first orientation when a first combination of states is detected for the plurality of channels, and determines that the interface is in a second orientation when a second combination of states is detected for the plurality of channels.

Abstract: Embodiments of a method and a device are disclosed. In an embodiment, an electronic device includes a plurality of input ports configured to receive at least two serial communication signals, an encoder circuit configured to encode the at least two serial communication signals based on signal edges of the at least two serial communication signals to generate an encoded serial communication signal, the encoded serial communication signal enabling reconstruction of the at least two serial communication signals independent of a clock signal, and a transmitter configured to transmit the encoded serial communication signal.

Abstract: A circuit for detecting charger connection through a universal serial bus (UBS) connector is disclosed. The circuit includes a comparator having a first input coupled to a fixed voltage reference and a second input coupled to D+ pin of the USB connector, a voltage controlled current source (VCCS) coupled having a first terminal coupled to a supply and a second terminal coupled to the D+ pin and a resistor coupled between the first terminal and the second terminal of the VCCS. The VCCS is configured to bring voltage at the D+ pin within a preselected voltage range at the D+ pin when the voltage at the D+ pin varies beyond the preselected voltage range.

Abstract: A universal serial bus (USB) circuit includes a USB interface configured to transmit and receive power and data, a random number generator circuit configured to generate a random number, and a controller configured to receive the random number and to select a dual role port (DRP) duty cycle and to select a DRP duration based upon the random number, wherein the DRP duty cycle time and DRP duration are used when connecting a USB type-C DRP device to another USB type-C DRP device.

Abstract: A protocol can specifie a power-sourcing voltage range that indicates power sourcing capabilities. Additional power sourcing capabilities can be communicated using voltage variations within the power-sourcing voltage range. A power-sourcing device can provide power to an external power-sinking device over a wired connection containing a plurality of wires. A voltage control circuit can be configured to drive a voltage over a wire of the plurality of wires. Processing circuitry can communicate, using the voltage control circuit, first power-sourcing capabilities to the external power-sinking device by setting the voltage over the wire to a value within the power-sourcing voltage range. The processing circuitry can also communicate, using the voltage control circuit, the additional power sourcing capabilities of the power-sourcing device using voltage variations on the wire, the voltage variations maintaining voltage on the wire within the power-sourcing voltage range.

Abstract: A system including a device that is configured to communicate current sourcing capabilities to an external power source over a wired connection containing a plurality of wires. The device includes a power supply circuit configured to provide operating power for the device. A first pull-down circuit is configured to provide a pull-down for a particular wire of the wired connection using a first resistive element that is actively trimmed using the operating power. A second pull-down circuit includes at least one transistor that, in the absence of the operating power, is configured to enable a current path, in response to a gate voltage generated from a voltage on the particular wire, between the particular wire and a second resistive element.

Abstract: Disclosed is a method of controlling a USB Power Delivery System including determining whether at least a predetermined length of initial bits of a message is received, turning on a clock when the predetermined length is received, determining whether the message has stopped, starting a counter when the message has stopped, determining whether a count value of the counter has reached a predetermined value, and turning off the clock when the predetermined count value has been reached.

Abstract: Disclosed is a universal serial bus (USB) circuit, comprising including a USB interface configured to transmit and receive power and data, a random number generator circuit configured to generate a random number, and a controller configured to receive the random number and to select a dual role port (DRP) duty cycle and to select a DRP duration based upon the random number, wherein the DRP duty cycle time and DRP duration are used when connecting a USB type-C DRP device to another USB type-C DRP device.

Abstract: Disclosed is a method of controlling a USB Power Delivery System including determining whether at least a predetermined length of initial bits of a message is received, turning on a clock when the predetermined length is received, determining whether the message has stopped, starting a counter when the message has stopped, determining whether a count value of the counter has reached a predetermined value, and turning off the clock when the predetermined count value has been reached.

Abstract: Low power solutions can be provided in a serial bus system with a logic controller circuit. The logic controller circuit can include analog circuitry that includes a plurality of analog components and trimming circuitry for configuring the analog components. Digital circuitry can be configured to switch between an active mode and a hibernation mode, wherein the hibernation mode consumes less current than the active mode. A voltage regulator circuit can be configured to generate a regulated voltage from a supply voltage. A reset generation circuit can be configured to determine that the supply voltage has reached a first threshold voltage level and enable the voltage regulator circuit. When the regulated voltage has reached a second threshold voltage level and the supply voltage has reached a third threshold voltage level, the digital circuitry can be switched to the active mode.

Abstract: A protocol can specifie a power-sourcing voltage range that indicates power sourcing capabilities. Additional power sourcing capabilities can be communicated using voltage variations within the power-sourcing voltage range. A power-sourcing device can provide power to an external power-sinking device over a wired connection containing a plurality of wires. A voltage control circuit can be configured to drive a voltage over a wire of the plurality of wires. Processing circuitry can communicate, using the voltage control circuit, first power-sourcing capabilities to the external power-sinking device by setting the voltage over the wire to a value within the power-sourcing voltage range. The processing circuitry can also communicate, using the voltage control circuit, the additional power sourcing capabilities of the power-sourcing device using voltage variations on the wire, the voltage variations maintaining voltage on the wire within the power-sourcing voltage range.

Abstract: A system including a device that is configured to communicate current sourcing capabilities to an external power source over a wired connection containing a plurality of wires. The device includes a power supply circuit configured to provide operating power for the device. A first pull-down circuit is configured to provide a pull-down for a particular wire of the wired connection using a first resistive element that is actively trimmed using the operating power. A second pull-down circuit includes at least one transistor that, in the absence of the operating power, is configured to enable a current path, in response to a gate voltage generated from a voltage on the particular wire, between the particular wire and a second resistive element.