STM32H753XIH6: VCAP internal connections

tyassin · ‎2026-05-06

Hi
I am trying to figure out these VCAP conections.

From the datasheet I could look like they are internally connected together, for this reason could avoid routing these three pads together on my board.
Can anybody confirm that is the case?

Thank you.

mƎALLEm · ‎2026-05-06

Hello,

No. You should connect them externally. If they are two or three pads on a package there is a reason behind.

Not connecting them externally leads to an unexpected behavior.

This is how you should connect them:

Please refer to AN4938 "Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware dev" / Figure 18. STM32H753XI reference schematic.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

View solution in original post

mƎALLEm · ‎2026-05-06

Hello,

No. You should connect them externally. If they are two or three pads on a package there is a reason behind.

Not connecting them externally leads to an unexpected behavior.

This is how you should connect them:

Please refer to AN4938 "Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware dev" / Figure 18. STM32H753XI reference schematic.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Andrew Neil · ‎2026-05-06

See AN4938, Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development:

https://www.st.com/resource/en/application_note/an4938-getting-started-with-stm32h74xig-and-stm32h75xig-mcu-hardware-development-stmicroelectronics.pdf#page=12

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

tyassin · ‎2026-05-06

Great thank you for a fast and precise answer.