![]() Note: ~0.5k of the Flash is used for the bootloader for USB communications Lose a small amount of Flash for the convenience of push button Flash Which allows the Arduino IDE to upload programs the Arduino Uno. you canĭownload your programs into Flash just by re-writing the Flash (all doneĪbout 0.5k of the flash is dedicated to the bootloader operation It is alsoĮrasable which gives you the ability change its contents i.e. it retains information when the power is off. The Arduino Uno has three types of memory.įlash is the memory that permanently stores your programs i.e. This is for the ATMega328p and not necessarily for the whole board! ATmega328p datasheet chapter 29 electrical Characteristics. The USART is dedicated to communication over the USB interface (pins 0 &1). Timer 2 can accept an asynchronous input signal, and can use a 32kHz crystal. Analogue & PWM pins are also digital capable pins. 2 digital I/O are dedicated to the USB interface. ![]() All pins except the reset pin which can withstand 13V for ![]()
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