Data Sheet

• Optional Power-over-Ethernet support, both cheapie DIY or full 802.3af standards-compliant
• Ethernet activity indicators on both the PCB and the jack
• 10/100base-T auto-selection
• Fully compatible with standard Ethernet library
• Reset management chip
• Fixed SPI behavior on Ethernet chipset
• Robust power filtering
• Sexy rounded corners
Specifications
Microcontroller
• MCU Type: Atmel ATmega2560
• Operating Voltage: 5V
• MCU Clock Speed: 16 MHz
EtherMega
• Input Voltage: 7-28V DC (onboard switchmode power supply)
• Digital I/O pins: 54 (14 provide PWM output)
• Analog Input Pins: 16 (analog input pins also support digital I/O, giving 70 digital I/O total if
required)
• Analog Resolution: 10 bits, 0-1023 at 5V AREF is approx 0.00488V; 4.88mV per step
• Current Per I/O Pin: 40 mA maximum
• Total Current For All I/O Pins: 200mA maximum
• Current At 3.3V: 50mA maximum
Memory
• Flash Memory: 256 KB Flash Memory, of which 8 KB is used by bootloader
• SRAM, EEPROM: 8 KB SRAM, 4 KB EEPROM
• microSD: microSD card slot with SPI interface. Uses pins D4 (select), D50, D51, D52
Communications
• Serial: 4 x hardware USARTs, SPI (Serial Peripheral Interface), I2C
• Ethernet: 1 x 10/100 LAN port using the Wiznet W5100. Uses pins D10 (select), D50, D51,
D52
• Other: Integrated USB programming and communication port. Many other one-wire, multi-
wire, LCD and expansion devices supported by free code and libraries