Related Introduction

About Chip:

1.  ATMEGA328P-AU

2.  Atmega16U2 

USB to serial chip

3.  AMS1117

4.  5V and 3.3V stabilivolt chip

5.  W5500 network chip

About Interface:

1. ICSP interface

Program firmware to ATMEGA328P-AU

2. Digital interface D0-D13

Serial communication：D0(RX) and D1(TX)

External interruption：D2（interrupt 0）、 D3（interrupt 1）

PWM interface：D3、D5、D6、D9、D10 、D11

SPI communication：D10(SS)、D11(MOSI)、D12(MISO)、D13(SCK)

3. ICSP interface

Program firmware to Atmega16U2

4. USB port

For program download or serial debugging

5. DC power connector

Access to 7V-12V voltage

6. Power output port

Output 3.3V or 5V，for external power supply or common ground handle

7. Analog interface A0-A5

IIC communication：A4(SDA) and A5(SCL)

Also can be used as digital interface：A0(D14)、A1(D15)、A2(D16)、A3(D17)、A4(D18)、A5(D19)

8. Network connector

  RJ－45 network port

About Component:

1. reset button

2. 16MHz crystal oscillator

3. 25MHz crystal oscillator