#Arduino mega 2560 pin interrupt pins pro

Normally the system clock is 16MHz, but for the Arduino Pro 3.3V it is 8Mhz. The timer3, timer4 and timer5 are all 16bit timers, similar to timer1. All timers depend on the system clock of your Arduino system. Timer 0, timer1 and timer2 are identical to the ATmega168/328. The controller for the Arduino Mega series is the Atmel AVR ATmega1280 or the ATmega2560. Again, identical but differs in memory size. 8bits means 256 values where 16bit means 65536 values for higher resolution or longer count. The most important difference between 8bit and 16bit timer is the timer resolution. Timer0 and timer2 are 8bit timers, where timer1 is a 16bit timer. Both have 3 timers, called timer0, timer1 and timer2. These chips are pin compatible and only differ in the size of internal memory. You can configure the prescaler for the timer, or the mode of operation and many other things. The controller of the Arduino is the Atmel AVR ATMega 168 or ATmega328. The timer can be programmed by some special registers.

It is like a clock, and can be used to measure time events. And the Servo library uses timers and interrupts. The original tutorial is here: Ī timer or to be more precise a timer / counter is a piece of hardware built into the Arduino controller (other controllers have timer hardware, too). The PWM function analogWrite() uses timers, as do the tone() and the noTone() functions. Many Arduino functions use timers, for example the time functions: delay(), millis() and micros() and delayMicroseconds(). As an Arduino programmer you will have used timers and interrupts without detailed knowledge, because all the low level hardware stuff is hidden by the Arduino API. This tutorial shows the use of timers and interrupts for Arduino boards.

Arduino mega 2560 pin interrupt pins