New Contributor
Regular ContributorHi,
Please see my responses to your latest inquiries as following:
1. Please, give me the link to the document about the supported refclk IO standards for L/H Tile.
[CP] You may refer to the S10 datasheet at https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/stratix-10/s10_datasheet.pdf. Look for "L-Tile Reference Clock Specifications" and "H-Tile Reference Clock Specifications" sections.
Please, give me the link to the document about Quartus assigning 100 Ohm OCT for refclk by default.
[CP] You would need to run a compilation with Quartus to check on this.
You say that, if there is no termination on the board, I should just assign LVDS I/O standard in the Assignment Editor, and don't assign any internal termination at all?
[CP] You can verify if the 100 Ohm OCT is turned ON from the Fitter report after compilation. You can create a simple test design with Native PHY to try out.
Please let me know if there is any concern. Thank you.
New ContributorHi,
I created a test project, as you said.
My project has many clocks set as LVDS in the Assignment Editor, and with no termination set by me.
After compilation, the Fitter actually reports terminations as being OFF (see attached).
Also, I can't find "OCT" in any of the Fitter's messages.
Please tell me where exactly in the Fitter report can I see that the 100 Ohm OCT is turned ON , as you said.
Thank you.
