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

1.3 Hardware Configuration to Use External 25 MHz Oscillator for CAL_CLK_IN

Figure 1-3 shows the schematic segment for CAL_CLK_IN. As per the schematic, different jumper placements are used to enable implementation of external CAL_CLK_IN signal or onboard 25 MHz oscillator respectively.

Default jumper settings: Onboard CAL_CLK_IN

  • On P100 header, jumper placed between pins 1 and 3 to connect the onboard oscillator output to the retimer CAL_CLK_IN input.

Jumper settings to enable external CAL_CLK_IN option

  • Place jumper on P101 header to turn off the onboard oscillator.
  • On P100 header:
    • Remove the jumper connecting pins 1 and 3.
    • Place jumper to connect pins 3 and 5, to connect the J100 SMA connector signal to the retimer CAL_CLK_IN input pin.
Figure 1-3 DS560DF410EVM Schematic Portion for CAL_CLK_IN Input Circuit