The AVR64DD28-I/SP is an 8-bit microcontroller with 64kB Flash memory, 8kB RAM, 28-pin package, 24MHz clock frequency, multi-voltage I/O, 12-bit analog to digital converter, onboard Zero Cross Detection (ZCD) module, Digital to Analog Converter (DAC), two Universal Asynchronous Receiver/Transmitter (UART) for serial communication, a Serial Peripheral Interface (SPI) and a Two-wire Interface (TWI). It is manufactured by Microchip. It offers SPI or I2C interfaces for connectivity, is suitable for a variety of sensor, motor, audio and display applications, and is RoHS compliant.