USB type-C signal interface circuit
First Claim
1. A device comprising a USB-C controller instantiated as a first integrated circuit, the USB-C controller comprising:
- a first set of terminals to be coupled to host controllers;
a second set of terminals to be coupled to sets of D+/D−
terminals of a type-C receptacle;
a D+/D−
multiplexer to selectively couple the first set of terminals to the second set of terminals;
an electrostatic discharge (ESD) protection circuit coupled between the D+/D−
multiplexer and the second set of terminals; and
a charger detector circuit coupled between a positive data system terminal and a 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.
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Accused Products
Abstract
A device includes a USB-C controller instantiated as a first integrated circuit that includes a first set of host terminals coupled to host controllers and a second set of terminals coupled to sets of D+/D− terminals of a type-C receptacle. A D+/D− multiplexer is to selectively couple the first set of host terminals to the second set of terminals. An electrostatic discharge (ESD) protection circuit is coupled between the D+/D− multiplexer and the second set of terminals. A charger detector circuit is coupled between a positive data system terminal and a 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.
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Citations
20 Claims
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1. A device comprising a USB-C controller instantiated as a first integrated circuit, the USB-C controller comprising:
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a first set of terminals to be coupled to host controllers; a second set of terminals to be coupled to sets of D+/D−
terminals of a type-C receptacle;a D+/D−
multiplexer to selectively couple the first set of terminals to the second set of terminals;an electrostatic discharge (ESD) protection circuit coupled between the D+/D−
multiplexer and the second set of terminals; anda charger detector circuit coupled between a positive data system terminal and a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a USB host controller and a proprietary host controller; a USB type-C receptacle; and a USB-C controller coupled to the USB type-C receptacle, to the USB host controller, and to the proprietary host controller, the USB-C controller comprising; a first set of first terminals coupled to the USB host controller; a second set of terminals coupled to the proprietary host controller; a third set of terminals to be coupled to sets of D+/D−
terminals of the USB type-C receptacle;a D+/D−
multiplexer to selectively couple the first and second sets of terminals to the third set of terminals;an electrostatic discharge (ESD) protection circuit coupled between the D+/D−
multiplexer and the third set of terminals; anda charger detector circuit coupled between a positive data system terminal and a 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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method comprising:
operating a USB-C controller instantiated as a first integrated circuit, wherein the USB-C controller comprises a D+/D−
multiplexer, a charger detector circuit, and an electrostatic discharge (ESD) protection circuit, and wherein operating the USB-C controller comprises;selectively coupling, by the D+/D−
multiplexer, a first set of terminals to a second set of terminals, wherein the first set of terminals are coupled to host controllers and the second set of terminals are coupled to sets of D+/D−
terminals of a type-C receptacle;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; and providing ESD protection by the ESD protection circuit, wherein the ESD protection circuit is coupled between the D+/D−
multiplexer and the second set of terminals.
Specification