USB Repeater Protocol Detection and Mode Switching
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Solution Overview
Problem
Existing USB repeaters require multiple firmware versions to accommodate different protocols, leading to increased production costs and customer service efforts, and the need for an additional PD controller on USB cables to manage working mode switching, which complicates the system and increases costs.
Innovation Solution
A USB repeater with a signal repeating circuit and a monitor circuit that can selectively adjust operating parameters based on monitoring the configuration channel pin, allowing it to run in various working modes corresponding to different protocols without relying on the firmware version of the PD controller, thus eliminating the need for additional PD controllers on USB cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the USB repeater uses multiple firmware versions to accommodate different protocols, then the USB repeater can support multiple protocols, but the production costs and customer service efforts increase
Solution Approach 1:
The USB repeater is designed with a single firmware that can universally support multiple protocols (USB3, USB4, DP, Thunderbolt, HDMI) through automatic protocol detection and adaptive mode switching. The repeater gains signals from differential pin pairs and monitors configuration channel pins to automatically determine which protocol is being used, eliminating the need for multiple firmware versions while maintaining broad protocol compatibility
2Ease of operation
If the USB cable is equipped with an additional PD controller to control the working mode switching of the USB repeater, then the working mode switching can be controlled, but the costs of the USB cable increase
Solution Approach 1:
The USB repeater performs self-service by automatically detecting the protocol through monitoring the configuration channel pin and autonomously switching between working modes without requiring external control from a PD controller. The repeater gains the differential signal and independently determines the appropriate mode, eliminating the need for an additional PD controller in the USB cable while maintaining effective working mode control
3Length of stationary object
If the USB repeater is disposed on the USB cable, then the data transmission distance can be extended, but the system complexity and costs increase
Solution Approach 1:
The USB repeater functionality is merged directly into the USB cable structure, combining the signal repeating capability with the cable itself. This integration allows the cable to extend data transmission distance while the repeater automatically handles protocol detection and mode switching, reducing overall system complexity compared to having separate control components
Data Source
AI summary
The disclosure provides a USB device, a USB cable, and a USB repeater. The USB cable or the USB device includes a USB connector and the USB repeater. The USB repeater may gain a signal of a differential pin pair of the USB connector. The USB repeater may monitor a signal of a configuration channel pin of the USB connector. The USB repeater selectively runs in one of a plurality of working modes corresponding to a plurality of protocols according to a monitoring result.