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Title: Andromeda PHY not detected
Post by: akarcher on July 03, 2025, 02:25:42 AM

I am using the prebuilt reference design files on AM0010-02-4DE21MA.
Board does boot, but I do not see ethernet. Since the Phy is on the module I don't think this can be an issue with baseboard I built. I did copy the AMB0010 for Ethernet, USB and SD card.

from U-boot:
ZynqMP> net list
Could not get PHY for eth0: addr 3
Could not get PHY for eth0: addr 3
eth0 : ethernet@ff0e0000 00:00:00:00:00:00

Title: Re: Andromeda PHY not detected
Post by: akarcher on July 07, 2025, 11:36:42 PM

I did resolve this: The implementation of the level shifters for the LEDs was flawed on my base board, and this causes a change in the PHY address. I was unaware that the LEDs and PHY address were related at all.

Title: Re: Andromeda PHY not detected
Post by: Vadim Y on July 22, 2025, 09:22:32 AM

Dear Akarcher,

It's good to hear that you've solved the problem. Thank you for a feedback.

Good luck.

Best Regards,
Vadim Yunitski

Title: Re: Andromeda PHY not detected
Post by: CTSchorsch on November 07, 2025, 01:31:56 PM

Hi @akarcher,

can you go a little bit more in details how you fixed this issue ? I have a similiar problem with my phy addr

Thanks
Georg

Title: Re: Andromeda PHY not detected
Post by: M Kirberg on November 12, 2025, 12:41:31 PM

Hi,

the PHY uses the LEDs as strapping pins. So during reset the Pullups on the AM0010 have to be strong enough, they are 4K7.

So on the baseboard there should not be something pulling down (or at least with more resistance than 4K7 Ohm)

This is also an Error in the AMB0010 Carrier which will be fixed by increasing R38 and R39 to 10kOhm with a PCN

Trenz Electronic GmbH Support Forum

Trenz Electronic Products => Trenz Electronic FPGA Modules => Topic started by: akarcher on July 03, 2025, 02:25:42 AM