cancel
Showing results for 
Search instead for 
Did you mean: 

stm32h755 power review

baselimadt
Associate II

Hi,

I am designing a board based on STM32h755zit6 MCU and it's the first time for me working on this MCU, I am trying to simplify the design as possible to avoid any problem in the development, since we are short in time.
I found out that there is a firmware configuration for the power, is there a default configuration so I can make the hardware based on it? right now I made this schematic based on the Nucleo board, but I want to make sure that it's right configuration, Also I have the ST-link 2 is it possible to use it for programming? 

thanks 

Basel 

baselimadt_0-1731505805185.png

 

1 ACCEPTED SOLUTION

Accepted Solutions

Again please review the AN4938 "Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware" development:

SofLit_0-1731590016221.png

And reference design schematics:

SofLit_1-1731590140921.png

 

 

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

14 REPLIES 14
SofLit
ST Employee

Hello @baselimadt and welcome to the community,

Better to remove the grid from the background in your schematics for more visibility.

Thanks.

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.
liaifat85
Senior III

Shouldn't there be a pull-up resistor (typically 10 kΩ)  connected to the NRST pin?

No need for external pull-up resistor on NRST pin. There is one internal:

SofLit_0-1731508901755.png

 

 

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.

@liaifat85 wrote:

Shouldn't there be a pull-up resistor (typically 10 kΩ)  connected to the NRST pin?


No - As @SofLit said, there's one internally.

See Application note AN4938Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development:

AndrewNeil_0-1731509460003.png

https://www.st.com/resource/en/application_note/an4938-getting-started-with-stm32h74xig-and-stm32h75xig-mcu-hardware-development-stmicroelectronics.pdf#page=17

 

@baselimadt - study that app note.

here is a picture without it 

baselimadt_0-1731512095636.png

 

I did read it in a hurry, but I found that people still facing problem with it here in the community, so I decided to make a quick review with you, to make everything is good.
since we don't have time for redesign if there were a problem

To me, C74: you have 150pF but in the Nucleo-H755 is 220pF so I suggest to use that value.

 

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.
Sco
ST Employee

From hardware point of view:

1. STLINK V2 VS STLINK V3, the main point is speed. 

2. I reminder you that pin17(VFBSMPS) is an input pin, not a power pin.

3. Normally, if it's a first design your side, to reserve some 0R would be better, easier to debug.