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Altera_Forum
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15 years ago

Ethernet link speed auto detection

Hi I have a custom board with a ethernet PHY connected to the FPGA using RGMII. I am using triple speed ethernet and iniche. I do not have the signals set_10 and set_1000 from the PHY. I can...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Thank you. Figure 4-12 on page 4-24 is for MII/GMII interface. I am using a RGMII interface so I think the correct figure should be 4-13. My logic is as shown in 4-13 with set_1000 and set_10 tied to 0 in the FPGA. With this logic I can use the MAC in 1000 or 100, but I have to manually select the speed with the ETH_SPEED bit in the command_config register. What I am looking for is a way to make the MAC or iniche detect the ethernet link speed without using the set_1000 input.