Data Sheet

Specifications
Microcontroller
• MCU Type: Atmel ATmega328P
• Operating Voltage: 5V
• MCU Clock Speed: 16 MHz
EtherTen
• Input Voltage: 7-12V DC recommended, 6-20V DC maximum
• Digital I/O pins: 14 (6 provide PWM output)
• Analog Input Pins: 8 (analog input pins also support digital I/O, giving 22 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 For 3.3V Output: 50mA maximum
Memory
• Flash Memory: 32 KB Flash Memory, of which less than 1 KB is used by bootloader
• SRAM, EEPROM: 2 KB SRAM, 1 KB EEPROM
• microSD: microSD card slot with SPI interface. Uses pins D4 (select), D11, D12, D13
Communications
• Serial: 1 x hardware USART, SPI (Serial Peripheral Interface), I2C
• Ethernet: 1 x 10/100 LAN port using the Wiznet W5100. Uses pins D10 (select), D11, D12,
D13
• Other: Integrated USB programming and communication port. Many other one-wire, multi-
wire, LCD and expansion devices supported by free code and libraries