The use of the internal 1.2V is not supportet for delfino. Regardless this requirement we misconfigured the delfino TMS320F28376S by connecting the Vregenz to VSS (board ground). We have never seen any functional problems but we also use not the full internal functionallity. Now i try to figure out if we need a redesign to supply the 1.2V from external or not. Have you some performance datas from the internal 1.2V supply regarding max current, thermal aspects aso. What kind of failure can be triggered through this misconfiguration and which functionalities will be affected? Will the failure trigger the XRSn?