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Asked: 2026-05-30T06:55:05+00:00

This should be a simple formula but I can not figure it out. I

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This should be a simple formula but I can not figure it out.

I have a 16mHZ AVR Chip.

I need to run a PWM signal to be 24kHZ..

what is the formula to decide what is the best Prescaler.

I am using a 16bit timer.

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1 Answer

  1. Editorial Team

    Read the datasheet (here for example from ATmega328P datasheet, 16-bit Timer/Counter1 ) to get the formula:

    The PWM frequency for the output can be calculated by the following equation

    fPWM = fclk_IO / (N * (1 + TOP))

    The N variable represents the prescaler divider (1, 8, 64, 256, or 1024).

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