STM32H743: errata sheet reports a bug impacting FDCAN

[michael from rentron]

STM32H743: errata sheet reports a bug by using both CAN-Interfaces (CANFD), is this bug

still valid for currently manufactured silicon or fixed ?

[Tesla DeLorean]

Does it attribute it to Rev Y silicon? Because that relates to most everything currently shipped.

[michael from rentron]

Thanks for that info, i wil check it tomorrow when i'm back in office,

[Tesla DeLorean]

The Rev X might be available as an engineering sample, you would need to discuss your specific issue with the FAE servicing your account.

Rev Y has been on all the NUCLEO-H743ZI boards I have in stock. I have an old EVAL board with an earlier Rev Z part.

[michael from rentron]

Good evening from here, thanks for further clarification.

The error comes up by using both CAN at the same time, because they are sharing the same

memory buffer - so i understand the errata sheet. For me, it's not important when the bug exists

today - i'm just at the beginning regaring the H7-chip - but it's very important to know, that people

working to fix this issue in a later silicon - otherwise it would be a bit waste of time, because i need

both CAN's in the future - may be in a couple of months... When this becomes true, i can survive

easely for the time beeing. Only the current workaround proposed is not what i would call so:

"do not use both CAN at the same time"...

[Khouloud GARSI]

Hi @michael from rentron​ ,

As indicated in the Errata-sheet, this limitation will be fixed in the next Silicon revision.

Khouloud.

[michael from rentron]

Hi Khouloud,

Thank's for this information, i've not seen by reading the sheet, but anyway this solves the problem.

Michael.

[Khouloud GARSI]

Hi Michael,

It's indicated in the "Summary of device limitations" table:

where “-�? means "limitation absent".

You're always welcome and in case you have any other questions, do not hesitate to post them here in our STM32MCUs forum :smiling_face_with_smiling_eyes:

Khouloud.

[Tesla DeLorean]

When might we expect to see Rev X silicon in the wild?

[Khouloud GARSI]

Hi @Community member​ ,

All information regarding the new silicon revision will be communicated in ST website.

If you need any details urgently, you may contact your FAE.

Khouloud.