Atmega 8 bit avr microcontrollers atmel atmega328 pu low power avr 8 bit microcontroller atmega family 18v to 55v supply voltage 32kb flash memory 1kbytes eeprom memory 2kbytes sram data memory 23 io pins 6ch x 10bit adc channels 2 timers 6 pwm channels 20mhz clock speed serial 2 wire spi usart interfaces 28 dip case high performance low power avr 8 bit microcontroller advanced risc architecture high endurance non volatile memory segments power on reset and programmable