Usb type-c signal interface circuit

A USB-C controller comprising:

• a first set of terminals to be coupled to a host controller, the first set of terminals comprising a positive data system terminal and a negative data system terminal;
• a second set of terminals to be coupled to sets of D+/D− terminals of a type-C receptacle;
• a multiplexer to selectively couple the first set of terminals to the second set of terminals;
• and
• a charger detector circuit coupled between the positive data system terminal and the negative data system terminal of the first set of terminals, the charger detector circuit to detect whether the second set of terminals is coupled to a USB charger through the type-C receptacle;
• wherein the USB-C controller is instantiated as an integrated circuit (IC) chip.

A system comprising:

• a Universal Serial Bus (USB) host controller;
• a host controller;
• a USB type-C receptacle;
• and
• a USB-C controller instantiated as an integrated circuit (IC) chip, wherein the USB-C controller is coupled to the USB type-C receptacle, to the USB host controller, and to the host controller, and wherein the USB-C controller comprises:
• a first set of first terminals coupled to the USB host controller, the first set of terminals comprising a positive data system terminal and a negative data system terminal;
• a second set of terminals coupled to the host controller;
• a third set of terminals coupled to sets of D+/D− terminals of the USB type-C receptacle;
• a multiplexer to selectively couple the first and second sets of terminals to the third set of terminals;
• and
• a charger detector circuit coupled between the positive data system terminal and the negative data system terminal of the first set of terminals, the charger detector circuit to detect whether the third set of terminals is coupled to a USB charger through the type-C receptacle.

A method comprising:

• operating a USB-C controller instantiated as an integrated circuit (IC) chip, wherein the USB-C controller comprises a multiplexer and a charger detector circuit, and wherein operating the USB-C controller comprises:
• selectively coupling, by the multiplexer, a first set of terminals to a second set of terminals, wherein the first set of terminals are coupled to a host controller and the second set of terminals are coupled to sets of D+/D− terminals of a type-C receptacle;
• and
• detecting, by the charger detector circuit, whether the second set of terminals are coupled to a USB charger through the type-C receptacle, wherein the charger detector circuit is coupled between a positive data system terminal and a negative data system terminal of the first set of terminals.