For example, on the ESP32 board there are several contacts that can issue pulses when the controller starts, which is connected with the operation of the chip itself. It is not recommended to connect devices that respond to input signals from the ESP to these contacts.
Tell me, are there any contacts on the Arduino UNO (Atmega328P) that give out any impulses at startup?
In particular, it is important for me to know about the following contacts:
- PB1 (9 pin)
- PD4 (4 pin)
- PD5 (5 pin)