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zik
on Oct 31, 2018
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iPhones are allergic to helium
Nit-pick - you mean to divide 32.768kHz by 2^15, not 2^16 to get 1 pps.
tejuis
on Oct 31, 2018
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More nit-picking... according to wikipedia Lavet requires two states for one step, so 2^16 looks good based on this.
tejuis
on Oct 31, 2018
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Damn... I mean 2^14 looks good. :)
davrosthedalek
on Oct 31, 2018
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If you divide by 2^15, you have 1pps, but two states per second (high/low). That might be enough.
tejuis
on Oct 31, 2018
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Well, division was to be made with a binary counter. They typically work with rising edge clock, and you get a smaller circuit if you have 14 bits compared to 15 bits. I agree that 2^15 can be made to work by using both edges of clock signal.
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