Current sensing with internal Opamp and internal PGA

[Jelmer]

Hi I am trying to configure a custom board to start development for a new motor driver.

During this setup I encountered a very weird issue I don't understand. I want to use internal opamps for phase current sensing. These will be single ended opamps with internal PGA. In the board designer software this is shown as using one pin as can be seen in the image below. Yet when I configure this all and generate the IOC using the workbench I see that there are 2 more pins used for "OPAMPx_OUT". Why is that the case and how can I disable it? Please let me know if there is any more information you need.

 

[AScha.3]

Hi,

-- on which cpu ?

but in general, on F303 here, read in rm , opamp :

So output always on a pin, for debug or check, what its doing...  ok ?