Stan, sorry my text was a bit short.
VDD for the controller was round 3.0V. With the higher 3.3V at ADC_3V3 the difference from ADC_3V3 to VDD is 0.3V, maybe limited by an internal protection diode. And by the current via this protection the voltage was pulled to 3.3V, around 7.3V across R112.
?
73 Ludwig
