AVR-Chat

On 13 Dec 2006 at 14:53, dr_bitbucket wrote:

> I'm writing some assembly code for an ATtiny24 for a new project.  I 
> need to use timer1 to PWM output PA5 (OC1B) (pin 8, I believe) at 
> close to 38 kHz and 50% PW, it's for an IR LED being sensed by an 
> IS1U60.  I am using timer0 for PWM motor control (which works just 
> fine), and I would prefer to use timer1 for this application as it 
> offers a phase and frequency correct PWM mode, and I think that's 
> snazzy.
> 

	You don't need PWM mode for 38kHz @50% duty cycle.
	Just use the Timer1 in CTC mode and adjust COM0/1.
	See the datasheet Table 14.4 mode 4.

	Mark Jordan