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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.forth
Subject: Re: polyForth multitasker question
Date: Sat, 15 Apr 2017 17:32:07 -0700
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rickman <gnuarm@gmail.com> writes:
> The timer will be running any time you have a time sensitive task, no?
> So the power used to wake up at 10 Hz by your numbers is just 150 nA.

In the keypad example there is no activity at all until someone presses
a key.  So no need to wake up at 10 hz.  You can stop all the timers.
When someone presses a key you would want to start a timer to be able to
handle inputting the entry code (or timing out), debouncing, etc.