Error message when booting Verdin AM62

Hello,

We have developed our own PCB with an AM62 on it. Version 1 of the PCB booted fine. Now the version 2 gives the following error message:

U-Boot SPL 2023.04-6.5.0-devel+git.9c8485712f05 (Dec 19 2023 - 08:33:12 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.1.8--v09.01.08 (Kool Koala)')
SPL initial stack usage: 1856 bytes
Trying to boot from MMC1
Authentication passed
Authentication passed

U-Boot 2023.04-6.5.0-devel+git.9c8485712f05 (Dec 19 2023 - 08:33:12 +0000)

SoC:   AM62X SR1.0 HS-FS
DRAM:  1 GiB
Core:  143 devices, 31 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from MMC... OK
In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
Model: Toradex 0075 Verdin AM62 Dual 1GB WB IT V1.1A
Serial#: 15207094
Timed out in wait_for_event: status=0000
Check if pads/pull-ups of bus are properly configured
Timed out in wait_for_event: status=0000
Check if pads/pull-ups of bus are properly configured

The last message keeps repeating.

When we switch the AM62 with an older iMX8MM on version 2 PCB booting works fine.
There are no changes between PCB version 1 and 2 regarding the connections with the SOM. It looks like as if there is an pin shortcutted or a missing pullup. But which pin?

Regards,
R. van den Heuvel

Hello @RemcoSeascape ,

Would it be possible for you to share the schematics of both carrier board versions?
You can share them via share.toradex.com and then send us the generated link via email , mentioning this ticket.

Best regards,
Josep