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communicate PIC and shift register

Discussion in 'General Electronics Discussion' started by ami85t, Mar 5, 2014.

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  1. ami85t

    ami85t

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    Feb 19, 2014
    Hi,
    In a project which I'm building i need to send and receive data between
    a shift register (CD43034B) and a pic (pic16f877).
    the SR is a bidirectional one and its role is to send and receive
    a frequency to and from the PIC, whom checks the change in the frequency.
    Therefore there's data been sent all the time, and I need to Know when the
    end of transmission of the data from the SR is finished its cycle.
    as far as I see in the data sheet of the SR there is no indication for such
    thing.
    does that need to be by a code which counts the
    number of data packets which are received? counting clock cycles of common
    clock of the components?
    or maybe there's a better and easier way for finding that out?

    Thanks, Amitai
     
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