RTC chip or PIC?

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  1. - 28th July 2009, 10:15 #5
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    flotulopex
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    Default How to trigger the "second" increment?

    I have started some trials with a DS1307.

    Since the smallest "common" change in RTC are seconds, I assume there is no use for the PIC to query constantly the RTC; every second should be enough.

    How do I achieve this? I couldn't find a clue in either datasheets
    http://www.datasheetcatalog.org/data...xim/DS1307.pdf
    http://www.datasheetcatalog.org/data...onics/7529.pdf

    Maybe, I should rather use a RTC chip with alarm such as a DS1678
    http://datasheets.maxim-ic.com/en/ds/DS1678.pdf
    Last edited by flotulopex; - 28th July 2009 at 10:49. Reason: adds
    Roger
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