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So we can say that the duty cycle is 50%. Like in 100ms pulse signal, if the signal is HIGH for 50ms and LOW for 50ms, it means the pulse was half time HIGH and half time LOW. The percentage of time in which the PWM signal remains HIGH (on time) is called as duty cycle. There are two important parameters for a PWM as discussed below: The time during which the signal stays high is called the “on time” and the time during which the signal stays low is called the “off time”. Pulse Width Modulation (PWM) is a digital signal which is most commonly used in control circuitry. If you don’t know what is duty cycle in PWM then let’s discuss in brief. In this Atmega16 PWM tutorial we will use Timer2. In generating PWM, a faster PWM frequency will give finer control over the output because it can respond faster to new PWM duty cycles. So the higher frequency will give us a faster timer. As we know that the frequency is number of cycles per second that the timer runs at. To generate PWM we must have an overview of timers as timers are used to generate PWM. Timer0 and Timer2 are 8-bit timers whereas Timer1 is 16-bit timer.

These pins are PB3(OC0), PD4(OC1B), PD5(OC1A), PD7(OC2).Īlso Atmega16 has two 8-bit timers and one 16 bit timer. Generating PWM signals on GPIO pins of PIC MicrocontrollerĪtmega16 has four dedicated PWM pins.Pulse width Modulation (PWM) in STM32F103C8: Controlling Speed of DC Fan.Generating PWM using PIC Microcontroller with MPLAB and XC8.Pulse width Modulation (PWM) using MSP430G2: Controlling Brightness of LED.ARM7-LPC2148 PWM Tutorial: Controlling Brightness of LED.