How to synchronize the inputs of multiple ADC chips using the JESD204B IP core in an FPGA?

[allen18]

        Hello everyone, I have encountered some issues in designing an FPGA solution for receiving ADC data. The FPGA I am using is stratix10-1SX110HN2F43I2VG, which has two tiles, with each tile having 4 banks. Each bank has 6 channels and two reference clock inputs.
I need to use the JESD204B interface to synchronize the inputs of 8 ADC chips. I have checked the IP core guideline, which tells me that I need to instantiate 8 IP cores for the 8 links. I plan to use 4 lanes for each IP core, requiring a total of 32 channels.
        I intend to use the first H tile for 24 channels, accommodating 6 IP cores, while the remaining 2 IP cores will be placed in the second H tile. I also plan to distribute the device clock output from the LMK0482X chip to the reference clock of the first H tile, and I will also connect this clock to the PLL core to generate the frame clock and link clock.
       I plan to share the sysref signal connected to the FPGA to the 8 IP cores. Assign it to common IO pins ,because it's a low-speed signal .

      1.I want to know if the 8 IP cores in the two tiles can share the reference clock connected to the first H tile ?  If not, I may need to connect another device clock to the reference clock of the second H tile. These two clocks will be used for the 6 IP cores in the first tile and the 2 IP cores in the second tile.
      2.Another issue is that the LMK0482X chip can only output a maximum of 7 sets of device clocks and sysref signals, but my design seems to require 9 sets of device clocks and sysref signals or more. How should I design it more reasonably?

[ZH_Intel]

Hi Allen,

Thank you for reaching out.

Just to let you know that Intel has received your support request and currently we are confirming the details with our internal team.

I shall come back to you with findings.

Thank you for your patience.

Best Regards,

ZulsyafiqH_Intel

[allen18 · Accepted solution]

I have solved this problem. I used a clock buffer chip to replicate multiple sets of clocks.

[ZH_Intel]

Hi Allen,

Apologize for the delayed response as we encounter some technical difficulty.

Glad that your problem is solved, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread.

Thank you.

Best Regards,

ZulsyafiqH_Intel