Description: CPU kernel: AVR CPU Max primary frequency: 16 MHz working voltage range: 4.5V~5.5V internal oscillator: with program FLASH capacity: 128K@x16bit RAM Total capacity: 8KB EEPROM / data FLASH capacity: 4KB GPIO port number: 86 ADC (cell / channel number / digit): 1 @ 1 x 16 ch / 10bit peripherals / functions / protocol stack: