Elaboração de uma metodologia para análise de parâmetros de integridade de sinais em barramentos USB 3.0..

Abstract

The work presents methodological research for the analysis of signal integrity parameters in USB 3.0 buses using Time Domain Reflectometry (TDR) technique, aiming at the feasibility of pre-compliance analysis of products in the development phase that contain this standard type of communication. Initially, there is research on the specifications of USB 3.0 and USB Type-C cable to categorize the board to be tested (which can be a host, a peripheral device, a hub, or an interconnection), resulting in the identification of compliance equipment according to the USB-IF standard. Subsequently, market research evaluates the costs of the equipment, seeking more affordable alternatives, with a special emphasis on TDR. Preliminary tests are conducted with the TDR in the laboratory, calibrating it, configuring other instruments such as the oscilloscope, and identifying the necessary accessories for the final tests. The tests are carried out following the proposed methodology, documenting each step, from the characterization of the Device under Test (DUT) to the analysis of the obtained results. The tests encompass the analysis of the chosen fixture, data collection with the DUT and an equivalent device, aiming for comparison. The main results obtained include the analysis of impedance profile and the estimation of the frequency band that defines the DUT as a non compliant USB 3.0 device, thus validating the proposed pre-compliance testing methodology. Finally, the conclusions address the collected data, the performance of the proposed methodology, and suggestions for improving result accuracy. Keywords: , ,