USB Integrated Circuit with Dynamic PHY Switching
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Solution Overview
Problem
Current USB integrated circuits lack a flexible connection configuration, leading to inefficiencies such as idle TX PHY and RX PHY circuits when connecting devices with different USB standards, resulting in wasted chip area and power consumption.
Innovation Solution
The USB integrated circuit incorporates a flexible connection configuration with dynamically switchable connecting component pairs and switching circuits, allowing adaptive coupling to different USB connectors and usage scenarios, reducing the number of TX PHY and RX PHY circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple USB connectors are provided with dedicated TX PHY and RX PHY circuits for each, then high-speed transmission capability is improved, but chip area and power consumption increase
Solution Approach 1:
The patent merges multiple USB connector interfaces into a single shared TX PHY and RX PHY circuit. The first USB connector (Type-C) and second USB connector (Type-A) both share the same physical layer circuits through switching mechanisms, eliminating the need for separate dedicated PHY circuits for each connector type.
Solution Approach 2:
The TX PHY and RX PHY circuits are designed to serve multiple USB connector types universally. The same physical layer circuits can handle both Type-C and Type-A connections, as well as multiple USB versions (2.0, 3.0, 3.1), making the PHY circuits multi-functional rather than dedicated to a single connector type.
2Reliability
If dedicated TX PHY and RX PHY circuits are allocated to each USB connector, then transmission reliability is improved, but power consumption increases due to idle circuits
Solution Approach 1:
The patent introduces dynamic switching mechanisms that actively route active PHY circuits to the currently connected USB device. When a device is connected to the first Type-C connector, the switching circuit directs the TX PHY and RX PHY to that connector, while disconnecting power or placing idle PHY circuits in low-power states, thereby dynamically optimizing power consumption based on actual usage.
Solution Approach 2:
The system automatically detects which USB connector has an active device and self-adjusts the PHY circuit allocation accordingly. The switching circuit monitors connection status and autonomously routes the active PHY circuits to the appropriate connector without manual intervention, ensuring that only necessary circuits remain active and consume power.
3Adaptability or versatility
If separate TX PHY and RX PHY circuits are provided for each USB connector, then adaptability to different USB standards is improved, but device complexity increases
Solution Approach 1:
The patent implements universal PHY circuits that can adapt to multiple USB standards (USB 2.0, USB 3.0, USB 3.1) and connector types (Type-C, Type-A) through a single shared resource. The same TX PHY and RX PHY circuits are capable of operating across different USB versions and connector formats, eliminating the need for separate dedicated circuits for each standard combination.
Solution Approach 2:
The switching circuit acts as an intermediary between the USB connectors and the shared PHY circuits. It manages the interface between multiple connector types and the unified physical layer resources, handling the complexity of routing and configuration internally while presenting a simplified interface to the rest of the system.
4Area of stationary object
If multiple USB connectors share common TX PHY and RX PHY circuits, then chip area is reduced, but connection configuration flexibility is limited
Solution Approach 1:
The patent employs dynamic switching circuits that can reconfigure connections in real-time based on which USB device is currently connected. When a device is connected to the first Type-C connector, the switching circuit dynamically routes the shared PHY resources to that connector. When a device is connected to the second Type-A connector, the switching circuit dynamically reconfigures to route resources accordingly, providing operational flexibility despite shared hardware resources.
Data Source
AI summary
A USB integrated circuit includes three TX connecting component pairs and three RX connecting component pairs. The first TX connecting component pair and the first RX connecting component pair are respectively coupled to the first TX pin pair and the first RX pin pair of the first USB connector. The second TX connecting component pair and the second RX connecting component pair are respectively coupled to the first TX pin pair and the first RX pin pair of a second USB connector. The third TX connecting component pair is coupled to the second TX pin pair of the first USB connector or to the second TX pin pair of the second USB connector. The third RX connecting component pair is coupled to the second RX pin pair of the first USB connector or to the second RX pin pair of the second USB connector.