Make the MG tx pin open collector and put a pullup on it, might even be possible to make it open collector and pullup as a setting to the MG, some uCs can do it even on peripheral pins. Ideally the pullup should be on the ATSAM VCC side.
Make the MG tx pin open collector and put a pullup on it, might even be possible to make it open collector and pullup as a setting to the MG, some uCs can do it even on peripheral pins. Ideally the pullup should be on the ATSAM VCC side.