I have managed to output 500kHz PWM at 50% duty cycle on PA2 TOCC1 of ATTiny841.
DDRA = (1 << PA2);//PA2 pin as an output TOCPMSA0 = (1 << TOCC1S0);//TOCC1 linkage TOCPMCOE = (1 << TOCC1OE);//Enable PWM TCCR1A = (1 << COM1A1) | (1 << WGM11);//Fast PWM 1110 TCCR1B = (1 << CS10) | (1 << WGM12) | (1 << WGM13);//Fast PWM 1110 ICR1 = 1;//Not sure how clock is calculated but this gives me 500kHz on scope
I would like now to generate a 450kHz PWM on that same pin. 444.44kHz = 8MHz/18 would be acceptable. How can I do that?
The datasheet of ATTiny 841 is available here: http://www.atmel.com/Images/Atmel-8495-8-bit-AVR-Microcontrollers-ATtiny441-ATtiny841_Datasheet.pdf