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TSchu3's avatar
TSchu3
Icon for Occasional Contributor rankOccasional Contributor
8 months ago

GMII to RMII Converter usage restrictions

Hello, I am interested in using the GMII to RGMII converter core on an Arria 10 without using the HPS. In the Embedded Peripherals guide section 49 it has a note stating this IP is only supported...
Ethernet
ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
8 months ago

Hi,


The GMII to RGMII converter core is supported in Arria 10 check this link https://www.intel.com/content/www/us/en/docs/programmable/683130/24-3/device-support.html

However, cannot use the GMII to RGMII Converter with the Triple-Speed Ethernet. Check internal message below:

Our internal team replied that RGMII is supported for our Arria 10 SoC HPS EMAC.

However, to use the Triple-Speed Ethernet IP, the RGMII interface is not supported in Intel Arria 10.

So the answer is no, you cannot use the HPS GMII to RGMII Converter with the Triple-Speed Ethernet, since the RGMII interface is not supported for Arria 10.

Check this KDB as well: https://www.intel.com/content/www/us/en/support/programmable/articles/000077033.html


Thanks,

Regards,

Sheng


TSchu3's avatar
TSchu3
Icon for Occasional Contributor rankOccasional Contributor
8 months ago

Hi thanks for confirming that the IP is supported in the Arria 10.
However, I am confused on the second part of the answer.
Based on the KDB link. RGMII should not work at all for Arria 10 because it fails timing.
So how can the IP work with the HPS but not the Triple Speed Ethernet?

Thank you