Features:
28-pin AVR Microcontroller
Flash Program Memory: 8 kbytes
EEPROM Data Memory: 512 bytes
SRAM Data Memory: 1 kbytes
I/O Pins: 23
Timers: Two 8-bit / One 16-bit
A/D Converter: 10-bit Six Channel
PWM: Three Channels
RTC: Yes with Separate Oscillator
MSSP: SPI and I²C..