The Arduino Ethernet is a microcontroller board based on 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. A Power over Ethernet (PoE) module is also added to the board.
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. This is the same interface found on the Ethernet shield. 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.
The Ag9120-S is a module designed to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet (PoE) standard.
The Ag9120-S provides the PoE compatibility signature and power classification required by the Power Sourcing Equipment (PSE) before applying up to 15W power to the port. The high efficiency DC/DC converter operates over a wide input voltage range (36V to 48V typ) and provides a regulated low ripple and low noise output. The DC/DC converter also has built-in overload and short-circuit output protection.
Features: IEEE802.3af compliant Small SIL package size – 56mm (h) x 14mm (h) Low output ripple and noise Input voltage range 36V to 57V Overload and short-circuit protection High efficiency DC/DC converter (75% typ) 1500V isolation (input to output).
- 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