SNLU293A December   2022  – December 2022 DS560DF810

 

  1.   DS560DF810EVM User's Guide
  2.   Trademarks
  3. 1Hardware Description and Setup
    1. 1.1 Required Hardware
    2. 1.2 General Hardware Test Setup Procedure
    3. 1.3 Hardware Configuration to use Onboard 25 MHz Oscillator for CAL_CLK_IN
  4. 2Software Description
    1. 2.1 Software Installation Sequence
    2. 2.2 Latte Functional Overview
    3. 2.3 Useful Latte Short-Cuts
    4. 2.4 DS560DF810EVM Initialization Through the Latte GUI
      1. 2.4.1 Connect Latte to Board
      2. 2.4.2 Compile Libraries
      3. 2.4.3 Example: Programming DS560DF810EVM for 26.5625 GBd PAM4 Test Case
      4. 2.4.4 Retimer Configuration
      5. 2.4.5 Retimer “Useful Functions” (Contained in the usefulFunctions.py Latte Script)
      6. 2.4.6 Vertical Eye Monitor
  5. 3Test Case Examples
    1. 3.1 Transmitter Test Case – EVM Board Output Evaluation for 26.5625 GBd PAM4 Data
    2. 3.2 Receiver Test Case – High Loss Input Channel to Retimer EVM, 26.5625 GBd PAM4
  6. 4Supplemental Documents
  7. 5EVM Cable Assemblies
  8. 6Revision History

2.4.6 Vertical Eye Monitor

To implement the retimer internal eye monitor function the user needs to load the Latte “custom GUI” shell. The steps are as follows:

  1. In the menu bar of Latte, select Session-> Load session.

  2. Select file “C:\Users\<User ID>\Documents\Texas Instruments\DS560Latte\projects\DS560_V3P0\setup\customGUI.astx”.

(Replace the <User ID> with proper Windows login ID.)

  1. You can now see “CGui_CGui_CGui_VerticalEyeMonitor” reflect in “Custom GUI List” (Window 6) of Latte.

Once the customGUI is loaded the vertical eye histogram of the received data across 64 bins can be plotted in Latte as shown in Figure 2-8 below. Data can be captured in a finite set of approximately 64k samples or continuously.

  1. Under controls tab, channel has to be set to desired one (valid range is 0 to 3).

  2. Set Capture type to Continuous or Finite samples from the drop-down mode.

  3. Click on Start Capture to get the vertical eye in the “Plot Eye data” tab.

GUID-20221026-SS0I-MWBS-R2D0-23NVFTPGK4XG-low.png Figure 2-8 Vertical Eye Monitor GUI