![]() But it gets divided by the Prescaler, then it gets fed to the timer.īasically, in timer mode, the TCNT register is incremented by 1 each clock cycle the following frequency (Fsys/PSC). And as you can see, the Fsys is not the frequency that is incrementing the timer module. Every clock cycle, the value of the timer is incremented by 1. As a 16-Bit time, it can count from 0 up to 65535. Let’s consider a basic 16-Bit timer like the one shown below. It can also have circuitry for input capture, PWM signal generation, and much more as we’ll see in this tutorial. It can have a Prescaler to divide the input clock frequency by a selectable value. More functionalities are implemented in hardware to support the timer module so it can count up or down. A Timer Module in its most basic form is a digital logic circuit that counts up every clock cycle. ![]()
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