An USB isolator assists eradicate floor loops and minimizes electromagnetic interference (EMI) involving the computer along with the related unit. 1x GND 3V3 (P2 with 2 pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to get rid of the P4/SHUNT in that https://englandv494dvm0.wikicommunications.com/user