KEYESTUDIO W5500 Ethernet Development Board(Without Poe)+USB Cable for Arduino, UNO R3+W5500 Ethernet

Parameters 1?Main Chip?ATMEGA328 microcontroller 2?USB power supply?5v 3?external power?7-12v?(9v recommended) 4?digital input/output pins: 14?of which 6 pins support PWM? 5?analog input pin: 6 6?built-in flash memory?32K 7?SRAM: 2k 8?EEPROM:1K 9?clock frequency?16MH 10.TCP/IP Ethernet controller W5500?MicroSD card mount?TF card??MicroUSB 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