The Arduino Ethernet is a microcontroller board based on the Arduino Uno and the ATmega328 (datasheet). It has 14 digital input/output pins, 6 analog inputs, a 16 MHz crystal oscillator, a RJ45 connection, a power jack, an ICSP header, and a reset button.
The Ethernet differs from other boards in that it does not have an onboard USB-to-serial driver chip, but has a Wiznet Ethernet interface. An onboard microSD card reader, which can be used to store files for serving over the network, is accessible through the SD Library.
The 6-pin serial programming header is compatible with the USB Serial adaptor and also with the FTDI USB cables or with Sparkfun and Adafruit FTDI-style basic USB-to-serial breakout boards. It features support for automatic reset, allowing sketches to be uploaded without pressing the reset button on the board. When plugged into a USB to Serial adaptor, the Arduino Ethernet is powered from the adaptor.
- Microcontroller ATmega328
- Operating Voltage 5V
- Input Voltage Plug(limits) 6-18V
- Input Voltage PoE (limits) 36-57V
- Digital I/O Pins 14 (of which 4 provide PWM output)
- Arduino Pins reserved 10 to 13 used for SPI, 4 used for SD card, 2 W5100 interrupt (when bridged)
- Analog Input Pins 6
- DC Current per I/O Pin 40 mA
- DC Current for 3.3V Pin 50 mA
- Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader
- SRAM 2 KB (ATmega328)
- EEPROM 1 KB (ATmega328)
- Clock Speed 16 MHz
- W5100 TCP/IP Embedded Ethernet Controller
- Power Over Ethernet ready Magnetic Jack
- Micro SD card, with active voltage translators
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