SNLA435A September   2023  – January 2024 DS320PR1601 , DS320PR410 , DS320PR810

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Device Overview
  6. 3Intention of Eye Scan
    1. 3.1 An Introduction to Lane Margining
    2. 3.2 How Does Eye Scan Work?
    3. 3.3 Programming Steps for Manual Eye Scan Capture
    4. 3.4 Eye Scan Capture Registers
    5. 3.5 CTLE Sweep Result
    6. 3.6 Eye Scan DAC Range
  7. 4Eye Scan Applications
    1. 4.1 Eye Scan Application: PCIe Compliance
    2. 4.2 Eye Scan Application: System
  8. 5Eye Scan in SigCon Architect GUI
  9. 6Summary
  10. 7References
  11. 8Revision History

3 Intention of Eye Scan

The Eye Scan feature of the Texas Instruments PCIe Gen5.0 redrivers was developed to allow users to determine an approximation of suitable equalization (EQ) boost settings for the PCIe redrivers, including CTLE and Flat Gain, in a quick and timely manner. Please note that this feature is designed to be used as an initial evaluation reference and cannot make sure of good system performance. The recommendation is to use other lane margining tools to monitor signal quality at each end of the PCIe link, or a compliance setup using equivalent BERT and or scope functionality to fine tune the redriver’s EQ boost settings to guarantee BER performance.