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SoCalJim
Associate III
Feb 18, 2025 12:10 AM UTC
Solved

Processor pin assignments

Given an MCU (say an STM32H755ZIT) and a function (say SPI2_MOSI), how can you find which pins may be configured as SPI2_MOSI, short of clicking on every pin in the Pinout View of the MX Device Configuration Tools?

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Andrew Neil
Andrew NeilBest answer
Super User
Feb 18, 2025 12:25 AM UTC

The Datasheet has a table which tells you what alternate functions are mapped to each pin.

For the case of STM32H755ZIT:

AndrewNeil_0-1739838195873.png

https://www.st.com/resource/en/datasheet/stm32h755zi.pdf#page=61

For how to select each Alternate Function, see:

AndrewNeil_1-1739838286998.png

 

 

 

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.
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4 replies

TDK
TDK
Feb 18, 2025 12:21 AM UTC

Two ways:

On the bottom right, you can search pins by function. Typing in "SPI2_MOSI" will have all pins that can be configured as that flash. Typing in "SPI2" will flash all pins with an SPI2 function.

TDK_0-1739838022387.png

 

It's also listed in the datasheet where you could Ctrl+F to search for it.

"If you feel a post has answered your question, please click ""Accept as Solution""."
Andrew Neil
Andrew NeilBest answer
Super User
Feb 18, 2025 12:25 AM UTC

The Datasheet has a table which tells you what alternate functions are mapped to each pin.

For the case of STM32H755ZIT:

AndrewNeil_0-1739838195873.png

https://www.st.com/resource/en/datasheet/stm32h755zi.pdf#page=61

For how to select each Alternate Function, see:

AndrewNeil_1-1739838286998.png

 

 

 

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.
SoCalJimAuthor
Associate III
Feb 18, 2025 12:57 AM UTC

Thanks! :)

    Andrew Neil
    Andrew Neil
    Super User
    Feb 18, 2025 1:32 AM UTC

    You're welcome.

    It it's answered your question, please mark the solution:

    https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256 

    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.
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