USB IC Routing Circuit for USB4 V2 Gen4 Signal Testing
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Solution Overview
Problem
Current programmable logic devices support limited transmission standards and cannot execute tests on signals conforming to the USB4 V2 Gen4 specification, hindering the development and testing of electronic devices that require these standards.
Innovation Solution
A USB integrated circuit with a first USB port physical layer circuit, lane adapters, and a routing circuit that can switch between testing and working modes to transmit differential signals conforming to USB4 V2 Gen4 specifications, allowing for the execution of tests on devices that do not support the USB4 V2 Gen4 specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a programmable logic device is used for testing, then the device can be programmed for various functions, but it cannot support USB4 V2 Gen4 specification testing
Solution Approach 1:
A USB integrated circuit is introduced as an intermediary device between the testing machine and the device under test. This intermediary IC supports USB4 V2 Gen4 specification and performs signal conversion, enabling the testing machine to test devices that do not natively support USB4 V2 Gen4. The intermediary IC includes a first USB port physical layer circuit, lane adapters, and a routing circuit that together bridge the capability gap.
Solution Approach 2:
The USB integrated circuit changes signal parameters by converting USB4 V2 Gen4 differential signals to USB4 V1 or USB3 differential signals. This parameter transformation allows the testing machine to communicate with devices under test using different signal standards, expanding testing capability while maintaining reliability for the specific USB4 V2 Gen4 specification.
2Adaptability or versatility
If a USB integrated circuit with lane adapters is used, then USB4 V2 Gen4 signal transmission is enabled, but the device complexity increases
Solution Approach 1:
The USB integrated circuit is segmented into distinct functional modules: a first USB port physical layer circuit for signal reception, multiple lane adapters for signal conversion, and a routing circuit for signal distribution. This segmentation allows each module to perform a specific function, making the complex circuit more manageable and maintainable while enabling USB4 V2 Gen4 signal transmission capability.
Solution Approach 2:
The USB integrated circuit is designed with multi-functionality to handle both USB4 V2 Gen4 and USB4 V1/USB3 protocols. The routing circuit can selectively connect the USB port physical layer circuit to different lane adapters based on the required protocol, making the device versatile and reducing the need for multiple separate testing devices.
3Ease of operation
If the routing circuit switches between testing mode and working mode, then flexible signal routing is achieved, but the control complexity increases
Solution Approach 1:
The routing circuit is designed to be dynamic, automatically switching between testing mode and working mode based on the operational requirements. In testing mode, it connects the USB port physical layer circuit to the first lane adapter for USB4 V2 Gen4 signal transmission. In working mode, it connects to the second lane adapter for USB4 V1 or USB3 signal transmission. This dynamic switching provides routing flexibility while the automated mode selection reduces control complexity.
Data Source
AI summary
A USB integrated circuit (IC), a testing platform and an operating method for USB integrated circuit are provided. The USB integrated circuit includes a USB port physical layer (PHY) circuit, a first lane adapter, a second lane adapter, a routing circuit, and a USB transport layer circuit. The USB PHY circuit is configured to transmit a differential signal between the USB integrated circuit and an outside device. When the USB integrated circuit operates in a testing mode, the routing circuit electrically connects the first lane adapter to the USB PHY circuit. When the USB integrated circuit operates in a working mode, the routing circuit electrically connects the second lane adapter to the USB PHY circuit. The USB transport layer circuit is coupled to the first lane adapter and the second lane adapter.