Introduction

The processor core of Keyestudio Nano CH340 is atmega328p-au. It is as same as the official Arduino Nano in addition to driver file and USB to serial chip (CH340G). It also has a 14 digital input / output interfaces (6 of which can be used as PWM output), 8 analog input interfaces, 1 16MHz crystal oscillator, 1 mini USB port, 1 ICSP interface, and a reset button.

The ICSP interface is used to burn firmware to Atmega328P-Au. Since this chip we burn firmly in front of the factory, it is generally not available. When using the Mini USB cable, we can use the VIN GND (DC 7-12V) to power.

What’s more, you can burn the firmware for Atmega328P-Au through the built-in ICSP port. The firmware of this chip is burnt well before delivery, therefore, you don’t need to burn the firmware.

The power can be supplied through USB cable, port 5V , GND（DC 5V), as well as Vin GND (DC 7-12V).

Specification

Microcontroller: ATMEGA328P-AU

Operating Voltage: 5V

Input Voltage (recommended): DC 7-12V

Digital I/O Pins: 14 (D0-D13)

PWM Digital I/O Pins：6 (D3 D5 D6 D9 D10 D11)

Analog Input Pins: 8(A0-A7)

DC Current per I/O Pin: 40 mA

Flash Memory: 32 KB of which 2 KB used by bootloader

SRAM:2 KB

EEPROM: 1 KB

Clock Speed:16 MHz

LED_BUILTIN:D13

Tutorial

https://fs.keyestudio.com/CH340-MAC   NANO PLUS Development Board

https://fs.keyestudio.com/KS0173   Nano ch340

NANO PLUS Development Board

Nano ch340