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Can't get the ADIN1300 to work at 100M in unmanaged mode

Thread Summary

The user encountered issues with the ADIN1300 PHY not establishing a stable link at 100M when configured in non-1G modes with the KSZ9477 switch. The problem was resolved by adjusting the RGMII port settings on the switch to match the 100M configuration. No SMI interface was required for this solution.
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Category: Hardware
Product Number: ADIN1300

Hello,

I have an ADIN1300 set up in unmanaged mode and hooked up to a KSZ9477 and everything works perfectly at 1G.

When I change the PHY Configuration using external resistors to other non-1G modes (I've tried rows 5, 9 and 14 on page 32 of the data sheet), the ADIN1300 blinks establishing a link and all partner devices I've tried also "blink yellow" to indicate 100M, but there's no actual data communication. The link hangs for a while then returns an error. The intention is to use the ADIN1300 unmanaged, so the board is not even equipped for handling the Management Interface at the moment. Is there anything I can try without having to resort to the SMI?

Thanks for any insights.

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