Why is there an STM32F103 on the B-G431B-ESC1 ?

davreg · ‎2025-04-16

Split from https://community.st.com/t5/stm32-mcus-motor-control/use-of-b-g431b-esc1-to-implement-my-own-algorithm/td-p/794170 as that is answered, and this is a new question.

I needed to confirm this before making use of it.

In the same thread, I have seen that these boards, although an STM32G431 is programmed, also have an STM32F103 on the daughtboard:

https://www.st.com/en/evaluation-tools/b-g431b-esc1.html#featured_resources-0

What is its function on the board?

Andrew Neil · ‎2025-04-16

It's probably the ST-Link - details should be in the User Manual.

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.

mƎALLEm · ‎2025-04-16

Indeed this is the STLINK block (used to program the STM32G4 MCU):

According to the board's schematic.

And this is the view on the PCB with the MCU and the ST-LINK (USB) connector:

And from the description on the board's page:

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Tesla DeLorean · ‎2025-04-16

Embedded ST-LINK/V2-1, provides a serial debug connection, and drag-n-drop .BIN file programming of the STM32G4 firmware.