USB Type-C Interface Circuit Pin Bypass Method
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Solution Overview
Problem
The detection of USB type-C interfaces requires an external circuit for signal switching, making the detection process inconvenient.
Innovation Solution
A USB type-C interface circuit with a multiplexer circuit and control logic circuit that couples configuration channel pins to signal terminals in response to switching requests, allowing direct communication with a port manager without additional switching circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external switch controlled by switching signals is added to accomplish signal switching in USB type-C interface, then signal switching function is achieved, but device complexity increases and detection convenience deteriorates
Solution Approach 1:
The patent merges the switch functionality into the USB type-C interface circuit itself by integrating a multiplexer circuit within the USB controller. This consolidation eliminates the need for separate external switching circuits, thereby reducing device complexity while maintaining the signal switching function. The multiplexer circuit is directly coupled to configuration channel pins and signal terminals, enabling internal signal routing without external components.
Solution Approach 2:
The USB controller is designed with multi-functionality by incorporating the multiplexer circuit that can handle both signal switching and detection functions. The control logic circuit within the USB controller manages multiple operations including switching configuration channel pins between different signal terminals and enabling direct detection mode, thereby eliminating the need for separate external switching and detection circuits.
2Difficulty of detecting and measuring
If an external circuit is added for support in USB type-C interface detection, then detection function is achieved, but ease of operation deteriorates due to inconvenience in detection process
Solution Approach 1:
The USB controller performs self-detection by integrating the multiplexer circuit and control logic circuit that can directly detect parameters of the USB type-C interface. The control logic circuit generates control signals to configure the multiplexer circuit for detection mode, enabling the USB controller to detect interface parameters without requiring external detection circuits or complex external configurations.
Solution Approach 2:
The patent extracts the detection function from external circuits and relocates it directly into the USB controller. By removing the requirement for external detection circuits and implementing detection capabilities within the USB controller itself, the system achieves simpler detection operation. The control logic circuit directly controls the multiplexer circuit to establish detection paths without external intervention.
3Adaptability or versatility
If additional switching circuits are used for USB type-C interface detection, then signal routing flexibility is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple switching functions into a single integrated multiplexer circuit within the USB controller. The multiplexer circuit is coupled to multiple configuration channel pins and signal terminals, providing versatile signal routing capabilities. By merging these functions into one internal circuit, the patent achieves signal routing flexibility without requiring multiple separate external switching circuits.
Data Source
AI summary
A universal serial bus type-C interface circuit and a pin bypass method thereof are provided. The interface circuit includes a first configuration channel pin, a second configuration channel pin, a port manager and a port controller. The port manager has a first signal terminal and a second signal terminal. The port controller includes a multiplexer circuit and a control logic circuit. The multiplexer circuit is coupled to the first configuration channel pin, the second configuration channel pin, the first signal terminal and the second signal terminal. The control logic circuit is coupled to the multiplexer circuit and provides a multiplexer control signal to the multiplexer circuit in response to a switching request. The multiplexer circuit couples the first configuration channel pin and the second configuration channel pin to the first signal terminal and the second signal terminal respectively according to the multiplexer control signal.