Abstract: Provided is a controller circuit that controls an external circuit and includes a power supply terminal that receives a power supply voltage, a first undervoltage lockout circuit that compares the power supply voltage with a first detection voltage and generates a first detection signal corresponding to a result of the comparison, a regulator circuit that receives the power supply voltage to generate an internal power supply voltage and stops operating according to the first detection signal, a control circuit that receives the internal power supply voltage to operate and controls a state of the external circuit, and a second undervoltage lockout circuit that compares the power supply voltage with a second detection voltage and generates a second detection signal corresponding to a result of the comparison.

Abstract: Provided is an oscillation circuit including a first terminal to which a first end of a crystal resonator is to be connected, a second terminal to which a second end of the crystal resonator is to be connected, a first resistor connected between the first terminal and the second terminal, a first transistor that is an N-channel transistor whose source is grounded, whose gate is connected to the first terminal, and whose drain is connected to the second terminal, a second transistor that is a P-channel transistor whose drain is connected to the drain of the first transistor, a third transistor that is a P-channel transistor biased by a constant current. A first state in which the first transistor and the second transistor operate as an inverter circuit, and a second state in which the second transistor and the third transistor operate as a current mirror circuit are switchable.

Abstract: The present disclosure provides a port controller and an electronic device. The port controller is compatible with a Universal Serial Bus (USB) Type-C standard and is used in a device operable as a sink device. The port circuit is communicable with an external main controller. A transceiver is communicable with a source device via a configuration channel (CC) pin of a receptacle. A control unit is capable of negotiating with the source device via the transceiver. A pin control circuit controls a state of the CC pin and monitors the state of the CC pin. A power supply circuit receives a bus voltage supplied from the source device and generates a power supply voltage of the main controller.

Abstract: A slave circuit that is connected to a master circuit via a bus, receives a power supply voltage via the bus, and receives a communication signal superimposed on the power supply voltage includes a diode bridge circuit configured to rectify a voltage of the bus, a capacitor connection pin to which a capacitor is connected, a P-type transistor connected between an output of the diode bridge circuit and the capacitor connection pin, an operational amplifier having a first input configured to receive a feedback voltage, having a second input configured to receive a reference voltage, and having an output connected to a gate of the P-type transistor, a receiving circuit configured to receive the communication signal, a first switch connected between the gate and source of the P-type transistor, and a control unit configured to control the first switch by generating a control signal synchronous with the communication signal.

Abstract: Provided is a semiconductor apparatus including a power supply pin configured to receive a power supply voltage from an outside, a capacitor connection pin to be connected with a capacitor, a power supply circuit having an input connected to the power supply pin and having an output connected to the capacitor connection pin, the power supply circuit being configured to generate an internal power supply voltage at the output of the power supply circuit, a nonvolatile memory configured to operate by receiving the internal power supply voltage, a switch disposed between a power supply terminal of the nonvolatile memory and the capacitor connection pin, and, a control unit configured to turn on the switch when the internal power supply voltage exceeds a predetermined threshold value.

Abstract: The present disclosure relates to a physical layer chip and an electronic device. The physical layer chip is compatible with (Universal Serial Bus) USB Type-C standard and used in a device operable as a sink device. The physical layer chip includes an interface circuit, a transceiver, a non-volatile memory, a pin control circuit and an initial negotiation circuit. The interface circuit is communicable with an external main controller. The transceiver is communicable with a source device via a CC (Configuration Channel) pin. The non-volatile memory stores information required for an initial negotiation with the source device. The pin control circuit controls a state of the CC pin and monitors the state of the CC pin. The initial negotiation circuit is capable of performing the initial negotiation with the source device via the transceiver based on the information stored in the non-volatile memory.

Abstract: The present disclosure provides a port controller and an electronic device. The port controller is compatible with a Universal Serial Bus (USB) Type-C standard and is used in a device operable as a sink device. The port circuit is communicable with an external main controller. A transceiver is communicable with a source device via a configuration channel (CC) pin of a receptacle. A control unit is capable of negotiating with the source device via the transceiver. A pin control circuit controls a state of the CC pin and monitors the state of the CC pin. A power supply circuit receives a bus voltage supplied from the source device and generates a power supply voltage of the main controller.