XPortHub feeding from Raspberry PI 3 A+ this time. 2nd board and 3rd MCU. The 1st MCU started behaving strange, so added a 2nd that did not work at all. Finally ripped off an old good one and we have a working board. Basically I need to make myself a tester for these MCU’s. Regardless, running fine at 168Mhz with USB working.
This board can as mentioned be used stand-alone powered by USB, as an add-on to Raspberry PI or as a module in a stack of similar board interconnected with CAN.