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i.MX8M Mini with PHY KSZ9031RNXIC-TR - Ethernet Communication issue

Question asked by Nija Mankodi on Jul 2, 2020
Latest reply on Jul 3, 2020 by igorpadykov

Hi NXP team,

We are using i.MX8M mini SoC with PHY KSZ9031RNXIC-TR in our product.

We are facing Eth communication issue in some of the boards (not all) where we are not getting proper IP (either static or dynamic).


PHY is detected as per log but we dont get IP and hence no communication takes place (ping or data transfer).


I have attached schematic for your reference. Also, attached debug console logs of working (where we get proper IP and communication happens) and non-working boards (where we dont get IP).


When we compared working and non-working logs, we got only one difference of below log,

"init: processing action (sys.sysctl.tcp_def_init_rwnd=*) from (/init.rc:734)"


Please check and provide your valuable feedback ASAP.