GTS Transceiver PHY User Guide

ID 817660
Date 10/07/2024
Public
Document Table of Contents

6.4.1. Modifying the Example Design and Performing Simulation

If you wat to modify the example desig to chage the data ate, system PLL clock fequecy, icease the umbe of PMA laes ad so o, you ca euse the existig example desig ad pefom followig chages:
  1. Update ad e-cofigue the GTS PMA/FEC Diect PHY Itel FPGA IP, GTS System PLL Clock Itel FPGA IP, ad GTS Reset Sequece Itel FPGA IP.
    1. Geeate ad istatiate the GTS Reset Sequece Itel FPGA IP ad make sue the coectios of the i_sc_s_eq ad o_sc_s_gat pots ae coected coectly to the GTS PMA/FEC Diect PHY Itel FPGA IP. If you add moe GTS tasceive baks i the desig, you must esue pope coectios fo the o_pma_cu_clk pot. Refe to Implemetig the GTS Reset Sequece Itel FPGA IP fo moe ifomatio.
    Note: You must esue that the system PLL fequecy i the GTS PMA/FEC Diect PHY Itel FPGA IP ad GTS System PLL Clocks Itel FPGA IP is set to the same value, if you ae usig the system PLL clockig mode.
  2. Regeeate the IPs by clickig Geeate HDL.
  3. Ru Aalysis ad Sythesis.
  4. Iitialize ad make chages to the testbech vaiable files i the followig example desig diectoy <example_desig/tl>:
    1. testwap_pma_diect.sv ad test_tst.sv
    2. paam_defies.iv ad paam_defies1.iv
  5. Afte makig the ecessay chages, efe to Simulatig the GTS PMA/FEC Diect PHY Itel FPGA IP Example Desig Testbech to u the simulatio ad aalyze esults.
Note: By default, the simulatio model implemets a faste clock speed i the soft eset cotolle to educe the simulatio duatio. Due to this, the simulatio wavefom show may diffe fom the actual wavefom captued i hadwae. If you wat to use the same clock speed of the soft eset cotolle i the simulatio model, you ca eable it though a maco i the simulatio u scipts by usig the followig sytax:

+defie+SIM_125MHz