CH340G Replace FT232RL.
Operating Voltage(logic level): 5V.
8 analog inputs ports:A0 ~ A7.
14 Digital input / output ports:TX,RX,D2 ~ D13.
6 PWM ports:D3, D5, D6, D9, D10, D11.
1 pairs of TTL level serial transceiver ports RX / TX.
Support USB download and Power.
Support for external 5V ~ 12V DC power supply.
Support power supply by 9V battery.
Support ISP download.
The LAFVIN Nano can be powered via the Mini-B USB connection.
ATmega328P – 8 bit AVR family microcontroller.
The button can resets the microcontroller.
FTDI USB Chip
The FTDI FT232RL chip on the Nano is only powered if the board is being powered over USB.