> I guess to me interrupt-on-change is simpler than that - you don't
> have to reset the the timer to FF, and you have 6 available pins to
> choose from rather than one that's fixed.
> 
> Not to be contrary, just wondering if I've overlooked something

No, IOC is an option. IOC isn't necessarily any easier, just another
way to do it. One advantage of T0CKI being unique is that if you
have other activity on GPIO, that might cause headaches with IOC.
But that's for the designer to sort out. IOC itself is perfectly viable

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