8-bit AVR Microcontroller with 32KBytes In-System Programmable Flash
Get interfacing with:
-Internal hardware (DIO, ADC, Interrupt, Timers)
-External hardware (LEDs, LCD, KEYPAD, 7SEGMENTS, BUTTONS, TRANSISTORS)
-Communication Protocols (SPI, UART)
DataSheet: http://ww1.microchip.com/downloads/en/DeviceDoc/doc2503.pdf