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RhSilicon
RhSilicon
Lead
June 17, 2023
Solved

Is there any STM32 F7 or H7 pin compatible with STM32F407VGT6 - LQFP100?

  • June 17, 2023
  • 2 replies
  • 4465 views

Hi,

 

I was very disappointed to note that STM32H743VIT6 is not pin compatible with STM32F407VGT6 in the LQFP100 enclosure.

 

It would be nice if MCU F7 and H7 could replace F4, without having to redo the PCB board again.

This topic has been closed for replies.
Best answer by STOne-32

Dear @RhSilicon ,

Unfortunately it is not possible from F4 to H7, here is the last series we released STM32H5 with Cortex-M33 secure core instead of M4 core and this is below the best we have done to keep pin compatibility ( strongly  requested by our customers like you ) . For LQFP 100 package 

IMG_3732.jpeg

thank You very much for the valuable feedback! Minor re-spin of PCB is required on these few power pins . 

Ciao 

2 replies

Tesla DeLorean
Tesla DeLorean
Guru
June 17, 2023

I think them changing the bond-out of the IC to suit is a more involved / expensive task than you revising your PCB..

The 144-pin packages have a much better history of back/forward compatibility. Although some still need accommodation for a handful of pins at a BoM level. See perhaps NUCLEO designs.

There's a "will-it-blend" type of tool within CubeMX / IDE for identifying parts.

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STOne-32
STOne-32
ST Technical Moderator
June 17, 2023

Dear @RhSilicon ,

Indeed LQFP100 is the only package not pin-to-pin compatible with STM32F7 series due to optimized performances and sustain the power rails . Here is attached screenshots from our Application note of Migration 

IMG_3731.jpeg

IMG_3730.jpeg

by the way , why moving to F7 or H7 series - curious to know if you need more memories or performance .

Ciao

STOne-32

RhSilicon
RhSiliconAuthor
Lead
June 17, 2023

Thanks,

I just need the USB Host to stop crashing in the enumeration.

Do all line 4 MCUs (F4, L4, G4) have the same USB OTG design?

I found this, about peripheral mode:

"When we ported the USB (device) driver to the L4 we had problems because a strange behavior of the OTG peripheral, we had to introduce workarounds in the driver, I don't know if the host mode driver could be affected in a similar way."

[No interrupt generated on USB device connection while USB OTG_FS core is running as USB host only]

http://forum.chibios.org/viewtopic.php?t=4966

STOne-32
STOne-32
ST Technical Moderator
June 17, 2023

Dear @RhSilicon,

Yes, on all of these products MCUs the USB Peripheral can be configured either a Host or a peripheral in Full speed mode ( using internal PHY) or High Speed HS using ULPI external PHY, except the F72x that embeds a High Speed PHY in addition to the full speed PHY.

now, regarding a potential issue in enumeration or detecting VBus presence I would suggest to debug the issue or to start from reference examples we provide in CubeMX or GitHub and then to add the features in the software stack to be robust enough in your application. If it persist , you escalate the case and have a Direct FAE helping you locally .

have a great end of day 

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