5 References AVR130: Using the timers on tinyAVR and megaAVR devices AVR135: Using Timer Capture to Measure PWM Duty Cycle on tinyAVR and megaAVR devices AVR205: Frequency measurement made easy with Atmel tinyAVR and Atmel megaAVR AVR504: Migrating from ATtiny26 to ATtiny261/461/861
