Nucleo-G491RE and opamp1

frogsdaddy · ‎2025-06-25

I am using Nucleo-G491RE. I am debugging through the built-in ST-Link using STM32CubeIDE 1.18.1. My design uses opamp1 in standalone mode, which assigns OPAMP1_VOUT to PA2 and OPAMP1_VINM to PA3. What configuration of solder bridges will bring these opamp signals to the Arduino or Morpho connectors? I have studied the user manual (MB1367) section 6.7, but it is not clear to me.

TDK · ‎2025-06-25

SB18/SB22 on

SB13/SB17/SB19/SB23 off

PA2/PA3 are then brought to the headers instead of the default PC4/PC5.

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Andrew Neil · ‎2025-06-25

It might be clearer to look at the schematics?

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.

frogsdaddy · ‎2025-06-25

Thank you. Where can I find the schematics? I have looked.

TDK · ‎2025-06-25

On the product page under CAD Resources.

https://www.st.com/en/evaluation-tools/nucleo-g491re.html#cad-resources

https://www.st.com/resource/en/schematic_pack/mb1367-g491re-c05_schematic.pdf

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