Attiny 8 bit avr microcontrollers atmel attiny2313 20su low power avr 8 bit microcontroller attiny family 27v to 55v supply voltage 2kb flash memory 128bytes eeprom memory 128bytes sram data memory 18 io pins 2 timers 4 pwm channels 20mhz clock speed usi usart interfaces 20 soic case high performance low power avr 8 bit microcontroller advanced risc architecture high endurance non volatile memory segments debugwire on chip debug system in system programmable via spi port