- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I have a ref clock of 312.5 MHz as input at the FPGA, a transceiver which requires 322.265625 MHz and 5.15625 GHz as reference clock inputs. The 5.15625 GHz can I make with a fPLL or ATX-PLL and connect to the transceiver. The 322.265625 MHz can I make with an IO-PLL, but the fitter complains when connecting the output of the IO-PLL to the transceiver. It is the rx_cdr_ref_clk_10g input pin of the transceiver.
Is there a workaround for this? I am using the transceiver for a 10 Gbps optical link and as far as I know the 322.265625 MHz is required.
Best regards
Link Copied
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Which IP and device part number you are using ? So I can try it out and create one example design and send to you.
Thank you ,
Regards,
Sree
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear Sree,
I am using the Arria 10 (10AS027E4F29E3SG) as device part and the IP I am using is the "1G/10GbE and 10GBASE-KR PHY Intel Arria 10" (where the 1 GbE interface is disabled). I want to use it in combination with the "Low Latency Ethernet 10G MAC". I also use the "Transceiver PHY Reset Controller".
Best regards,
Frank
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Frank ,
Thank you for the input ,
I could able to do fitter compliation passed with two method as below
i) IOPLL output connected to FPLL aand FPLL generate the required datarate clock. (More jitter )
ii) FPLL output connected to ATX PLL and ATX PLL generate the required datarate clock. (Recommeded Method)
Here is attached example design for your reference and let me know if you have any question/concern
Note : This is not complete design for 10G KR base PHY ; just to make sure i can route the XCVR PLL use Fabric PLL.
Hope Helps
Thank you ,
Regards,
Sree
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Frank ,
Sorry i didnt check with you the quartus version to be use before I start and yes I used 19.3 pro version.
If iam not mistaken , i dont think so we have backward compatibilityoptions in quartus.
Anyway i will change the design to 19.2 pro and attach it
Thank you ,
Regards,
Sree
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Dear Sree,
Thanks again. I was able to build your design. I will try to connect it at the same way in my own design.
Best regards,
Frank

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page