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Ask an Expert Forum External 10 MHz Reference Clock for ZCU208 via Simulink HDL IP Core Generation
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  • 10 MHz Reference Clock
  • zcu208
  • IP Core Generation
  • simulink
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External 10 MHz Reference Clock for ZCU208 via Simulink HDL IP Core Generation

dchien
dchien over 3 years ago

I am using Xilinx ZCU208 evaluation board with Simulink HDL IP Core Generation design process. The CLK104 board that comes with the ZCU208 uses the onboard 10 MHz reference clock as default. With the Avnet RFSoC Explorer, I can interactively configure the CLK104 to use external 10 MHz clock. I need to configure the LMK reference clock configuration to use the external 10 MHz clock. How do you configure the source of the 10 MHz reference clock in the Simulink design flow with the ZCU208 board?

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  • mbrown
    mbrown over 2 years ago in reply to dchien +1
    I believe we fixed this issue with rftool, which is included in a newly released version (v1.0.3) of the 'hdlcoder-zcu208' SD image. Download here: https://github.com/AvnetDev/hdlcoder-zcu208-zip/releases…
  • lightcollector
    lightcollector over 2 years ago in reply to dchien +1
    Hi dchien, I am sorry to tell you officially I cannot recommend you do any of this. Some of the clocking restrictions are due to limitation of the RFSoC and some of them are from how the HDL Coder for…
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  • mbrown
    0 mbrown over 3 years ago

    You could try the RFSoC Explorer API command below, which allows you to program the Texas Instruments LMK04828 onboard the CLK104.

     

    >> Avnet_RFSoC_Explorer('help','CLK104')

     

    [error_flag, data, msg] = Avnet_RFSoC_Explorer('Program_CLK104_LMK', <option>)

     

      Programs the Xilinx CLK104 LMK04828 PLL with the configuration specified

      by <option>. All predefined <option> set ADC and DAC RefClk = 245.76 MHz.

     

      Valid <option>:

     

        'Xilinx Default'

        '122.88MHz REFCLKOUT, 10MHz TCXO REF'

        '122.88MHz REFCLKOUT, 10MHz EXT REF' 

        'custom_TCS.txt'

     

      A custom LMK04828 configuration file can be created using Texas Instruments

      TICSPRO utility, saved as TEXT format with filename custom_TCS.txt, and

      located in the same directory as the RFSOC Explorer app.

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  • mbrown
    0 mbrown over 3 years ago in reply to mbrown

    FYI, you can find other RFSoC-related forum posts @ /products/devtools/avnetboardscommunity/avnetboard-forums/f/rfsoc-hardware-design

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  • mbrown
    0 mbrown over 3 years ago in reply to mbrown

    FYI, you can find other RFSoC-related forum posts @ /products/devtools/avnetboardscommunity/avnetboard-forums/f/rfsoc-hardware-design

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