An example on this page:
Example code:
#include <TimerHelpers.h>
...
// Timer 1 - vertical sync pulses
pinMode (vSyncPin, OUTPUT);
Timer1::setMode (15, Timer1::PRESCALE_1024, Timer1::CLEAR_B_ON_COMPARE);
OCR1A = 259; // 16666 / 64 uS = 260 (less one)
OCR1B = 0; // 64 / 64 uS = 1 (less one)
In this particular case the frequency was 60 Hz and the duty cycle 1 / 260. However by making OCR1A larger you could get a smaller duty cycle and thus a higher resolution (but a lower frequency). You can change the frequency to an extent by altering the prescaler.