USB interface circuit of Newman MP4 machine

Newman MP4 machine's USB interface circuit, as can be seen from the figure, the USB interface mainly has 4 pins: one
is the power terminal, used to receive the +5 V voltage provided by the computer ; two data terminals, used to communicate with the computer Pass data information: the last one is the
ground terminal. Different models of USB interface circuits have slightly different peripheral components. There is a filter/ protection circuit in the circuit to absorb
interference signals in the circuit.