I'm looking to control PWM computer cooling fans directly from an ATTiny85, the fans want a ~15-25khz PWM signal.
The currant involved in minimal.
At default settings with Coding Badly's excellent arduino port
I got 500hz from pin0 and 1khz from pin1.
However from reading about AVRs in general it appears that far higher is possible
just not doable through the arduino environment.
If I use " TCCR0B = TCCR0B & 0b11111101 | 0x01;" from the Arduino PWM frequency howto, I can get 1khz from pin0 and 2khz from pin1.
EDIT:That worked beautifully! I now have a pair of 15.6khz PWM outputs from my attiny85.Thank you very much!