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atmega328p - Arduino/Atmega328: check if PIN is shorted to GND - Electrical Engineering Stack Exchange
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AREF shows 0 volts at any configuration, whether internal 1.1V or Vcc - Microcontrollers - Arduino Forum
![Program and upload bootloader in new ATmega328p IC. Program ATtiny25/45/85, ATmega8 with Arduino UNO. Program and upload bootloader in new ATmega328p IC. Program ATtiny25/45/85, ATmega8 with Arduino UNO.](https://www.circuitstoday.com/wp-content/uploads/2021/04/circuit-1.jpg)
Program and upload bootloader in new ATmega328p IC. Program ATtiny25/45/85, ATmega8 with Arduino UNO.
![voltage reference - Does AREF pin of ATMEGA series consume any current? - Electrical Engineering Stack Exchange voltage reference - Does AREF pin of ATMEGA series consume any current? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/jucr4.png)