i.MX 8M Plus and RTL8211F

[www1519]

Hi NXP Engineer

In my design refer to NXP EVK, imx8m plus + RTL8211F is used.

5 PCBs are producted, and only 1 PCB ‘s network card had problem.

as below, when ifconfig, only lo

but when ifconfig -a ,  eth0 is shown.

The communicaiont is failure for PC and RTL 8211.

the remaining 4 PCBs ，have eth0 when using config not ifconfig -a.

please confirm. Thanks a lot.

Best Regards！

[www1519]

Hi @JosephAtNXP 

As below, confirm pls. thanks.

Best Regards!

[JosephAtNXP]

Hi @www1519,

I assume that your five boards are exactly the same schematic with exactly same part number for every component, am I right?

Seems that PHY is not responding maybe in time or speed, could you scope that the PHY is properly clock-fed and the MDIO lines actually have both-side communication?

Also, check for bootstrapping settings, did you populate the same bootstrap resistors?

Thank you

[JosephAtNXP]

Hi,

Thank you for your interest in NXP Semiconductor products,

Does the PHY still fail when you run this command?

$ ifconfig eth0 up

The IF hasn't the UP flag, that's why it doesn't appear on ifconfig output.

The ping will fail until it has an IP and a RUNNING flag.

Regards