I got one of these RTC's as a sample from Texas Instruments, and I am lost as to how to communicate with it, the datasheet is very confusing: http://www.ti.com/lit/ds/symlink/bq3285e.pdf could anyone shed some light on to how I can go about interfacing with it?
Its designed to be memory-mapped, with the ADn lines having address strobed on them, then a data access on same bus. This chip will use up all your Arduino pins to interface to, its designed for a full blown microprocessor bus.
ah ok then. I figured it was, what with the option of intel or motorolla bus speed.