Arduino Open-Source Single Board Computer Boards
- Arduino A000022, The Arduino Leonardo Ethernet board is based on the ATmega 32U4 microcontroller & the new Wiznet W5500 embedded Ethernet controller. The board has 20 digital I/O pins (7 can be used as PWM outputs & 12 as analog inputs). Additional features include a 16 M Hz xtal oscillator, RJ45 connection, micro USB (Universal Serial Bus) connector, power jack, ICSP header, & a reset button. The Leonardo ETH differs from the preceding Ethernet board in that the ATmega 32u 4 has built-in USB (Universal Serial Bus) communication, eliminating the need for an external USB (Universal Serial Bus)-to-serial converter. This allows the Leonardo ETH to appear to a connected computer as a mouse & keyboard, in addition to a virtual (CDC) serial / COM port. The Eagle files can be downloaded here. The schematic can be downloaded here. The datasheet for the ATmega 32U4 can be downloaded here. The Wiznet W5500 Ethernet chip datasheet can be downloaded here. Arduino Leonardo Ethernet A000022