SLLA680 August   2025

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2DisplayPort Link Training Sequence
  6. 3AUX Transaction Syntax
    1. 3.1 Request Command Definition of AUX Transaction
    2. 3.2 Reply Command Definition of AUX Transaction
  7. 4Introduction of DS90LV047-48AEVM
  8. 5Configuration of Measuring AUX CH With DS90LV047-48AEVM and Logic Analyzer
  9. 6Summary
  10. 7References

Abstract

The DisplayPort interface has an auxiliary (AUX) channel for bi-directional communication between the DisplayPort source and DisplayPort sink. The AUX channel is used for DP link training to optimize channel configuration. This application note is an introduction to monitor the DisplayPort AUX channel while link training. This assists in understanding the link training sequence and behavior between DisplayPort sink and source by extracting the discrete AUX transactions.