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In ST MotorControl Workbench 6.4.1, STM32G431CBUX fails on Internal OpAmps + External gain network configuration

fanghaha
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I am using ST MotorControl Workbench 6.4.1 with the STM32G431CBUX** MCU for a motor control project. When configuring the current sensing module for Three Shunt Raw Currents topology with the option Internal OpAmps + External gain network, the code generation fails with an RCSConnect error.But when I choose the option  Internal OpAmps +  Internal PGA eveything is good.

I am looking to understand:
1. Is the Internal OpAmps + External gain network configuration officially unsupported for STM32G431CBUX in MC SDK 6.4.1?
2. Or is this a hardware resource limitation (e.g., insufficient internal op-amps, pin conflicts) specific to this MCU that blocks this configuration?

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