TouchGFX configuration not reflecting STM32H743I-EVAL board schematics

[Southbranch]

We are considering a custom PCB design similar to the STM32H743I-EVAL.

However, we just discovered that when creating a TouchGFX project for this board, many configured pins are set different (shown in STM32CubeMX) than given on these schematics:

https://www.st.com/resource/en/schematic_pack/mb1246-b0x_schematic.pdf

https://www.st.com/resource/en/schematic_pack/mb1246-e02_schematic.pdf

A few examples of signales routed to other pins for the SDRAM: SDNWE,SDNE1, SDCEK1. There are also a handful of pins for the LCD which are routed elsewhere. The TouchGFX project runs fine so obviously these schematics must be invalid..

Is there a newer schematic version than MB1246-E02 dated in 2019?

Many thanks in advance

[Tesla DeLorean]

There have been several versions of the board what one do you actually have?

The Rev E is EVAL2, with the ST-LINK/V3

[Southbranch]

The board has STLINKV3 and the printed label on the MCU board says: MB1246-H743XI-E02, which should indicate it has the second schematic in my post. The display board says MB1063 REV B.

However, I can't find any other schematics than listed above

[Tesla DeLorean]

Right, but that's their prerogative, you might have to talk to an FAE to get others.

You might want to cross check the BGA ball assignments, I recall there being some subtle changes in a handful of them over the development cycle for the H7's which spanned back to 2017

Also the EVAL boards tend to have a myriad of solder-bridge and resistor paths to remap or reconfigure board use cases.

[Southbranch]

You are right, there is a myriad of solder bridges on this board but nothing shown on the schematics above that would allow balls assigments they way TouchGFX does.

@ST representatives, could you please help me out finding the right version of the schematic? If no schematic is available, please let me know also. (post this elsewhere?)

Thanks

[Amel NASRI]

Hi @Lars Sörqvist​ ,

I got the confirmation that the schematic version of April 2019 for MB1246-E02 is the latest one.

So we need the help of our Experts from TouchGFX team (@Romain DIELEMAN​ & @Alexandre RENOUX​ ) to understand more how TouchGFX matches STM32H743I-EVAL hardware design.

In all cases, for your pcb setup, references are the product datasheet and the application note about the hardware getting started.

You can also have a look to the user manual UM2198 Evaluation boards with STM32H743XI and STM32H753XI MCUs to check the main updates of the hardware revisions.

-Amel

[Southbranch]

Hi Amel!

Many thanks for helping out -:)

I believe my MB1246-E02 schematic is dated 13th Feb. 2019 and not April. Is there a link to a newer schematic verison?

In any case, I'll await some hints from your collegues about the matching TouchGFX (BGA pins) vs. schematic for this board.