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- Interfacing the DS12887 with PIC
February 16, 2007, 7:48 pm
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I'm trying to interface the real-time clock DS12887 with PIC18F452 but
since I'm new in these things I'm not getting any results.. Does
anyone have experience with this?
Or with any other multiplexed-bus real-time clock interface with PICs?
I think it would be easier using a RTC with I2C or SPI, the reason I'm
using this RTC is because it comes already with integrated crystal and
backup battery (the clock must never stop).
Can someone please help me?
Re: Interfacing the DS12887 with PIC
If I remember correctly that Dallas RTC was made to be used in a PC, on
the address and data busses like a rom chip, it was also the
non-volatile ram. One of the Epson clocks, like an RTC58321 would be a
better bet, it can get by with 4 I/O pins. Just add a backup battery,
it has an internal crystal.
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