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

3.1 Request Command Definition of AUX Transaction

Bit 3 = Native AUX or I2C over AUX.

1b'1 = DisplayPort transaction.

1b'0 = I2C transaction.

  • When bit3 = 1 (Native AUX transaction).
  • Bits 2:0 = Request type.
    • 000 = Write
    • 001 = Read
  • When Bit 3 = 0 (I2C over AUX transaction).
  • Bit2 = MOT (Middle of Transaction) bit.
  • Bits 1:0 = I2C_Command.
  • 00 = Write.
  • 01 = Read.
  • 10 = Write_Status_Update_Request.
  • 11 = Reserved.