We have used plenty of these low-cost Arduino boards with CH340 chips, and have found them to work perfectly. generic description applicable to all port pins in the AVR microcontroller family. It is assembled with the CH340 USB to Serial converter chip, instead of using an Atmega16U2 chip. Micro controller is atmega328, operating voltage (logic level)5 v input voltage (recommended)7-12 v input voltage) limits) 6-20v digital i/o pins 14 (of which 6 provide pwm output) analog input pins 8 dc current per i/o pin 40 ma flash memory 32 kb (atmega328) of which 2 kb used by boot loader ram 2 KB (atmega328) eeprom 1 kb (atmega328) clock speed 16 mhz. The Uno R3 CH340G ATmega328p Development Board is the low-cost version of the popular Uno R3 Arduino. ATmega328 and IC Wi-Fi ESP8266 with 32 MB flash. It's must be in data sheet but wait what I actually found was tuns of pages about pin layouts when search for arduino uno r3 datasheet. Full integration of microcontroller Atmel. But shouldn't there be some description for these macros and addresses.
The Arduino Nano R3 Board chip without USB Cable is vital for your small project where you don’t need much of a pin-outs but the small size is very important to make it look good. It is a customized version of the classic ARDUINO UNO R3 board.
The Arduino Nano R3 Board with CH340 chip without USB Cable chipboard is based on the famous Arduino platform and does all the functions of Uno, but with a smaller footprint.
