SNLU324 March   2023

 

  1.   Abstract
  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 External 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 DS560DF410EVM 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 DS560DF410EVM 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. 3Related Documentation
    1. 3.1 Supplemental Content
  6. 4EVM Cable Assemblies

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 listed 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_VP40\setup\customGUI.astx.

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

  1. Now CGui_CGui_CGui_VerticalEyeMonitor can be seen in the 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. Data can be captured in a finite set of approximately 64k samples or continuously.

  1. Under the controls tab, select the channel (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-20221103-SS0I-GJJZ-WPHD-CLVP7J0LRJWF-low.pngFigure 2-8 Vertical Eye Monitor GUI