Arduino core libraries

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only timer0 for millis() indeed.

Then if you use PWM on certain pins, this is where the other timers come into play. that's driven by the atmega 2560 hardware design

  • Timer 0 : pins 4 & 13
  • Timer 1 : pins 11 & 12
  • Timer 2 : pins 9 & 10
  • Timer 3 : pins 2, 3 & 5 (16 bits)
  • Timer 4 : pins 6, 7 & 8 (16 bits)
  • Timer 5 : pins 46, 45 & 44 (16 bits)

other libraries will use some timers (servo, ...)

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