An USB isolator assists do away with ground loops and lessens electromagnetic interference (EMI) in between the pc as well as the connected machine.1x GND 3V3 (P2 with two pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to remove the P4/SHUNT in that scenario it is not obligatory as the 3V3 LDO IC1 is safeg