NOT KNOWN FACTS ABOUT HYDRABUS

The reader initializes the communication. The RF discipline is activated, and a number of other minimal stage commands are exchanged to detect a suitable card.1x GND 3V3 (P2 with two pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to eliminate the P4/SHUNT in that case It's not required as the 3V3 LDO IC1 i