On Thu, October 3, 2013 7:29 am, Neil wrote:
> I haven't gone through all the specs yet, but so far I understand this
> PIC (18F25J50) can run the RTCC in "deep-sleep" mode, and would draw
> 2uA at the highest temp of 85 deg-C.  Realistically I can expect
> <389nA at 60 deg-C or less.
>
> Specific battery no issue at this time, and yes I can fit the thicker
> battery in there.
>
> The only issues I'll have to deal with here are that the PIC
> interfaces to other 5V devices so I'll raise the PS voltage to
> compensate for the diode drop, and the PIC needs a minimum of 2.35V to
> run, so I'll probably have to use more than one battery in series.
>
> Cheers,
> -Neil.

There are PIC18s with battery backup (Vbat) for the RTCC- the PIC18F97J94
family. There are also PIC24s with Vbat for their RTCC- the
PIC24FJ128GA310 family, amongst others.

Matt Bennett
Just outside of Austin, TX
30.51,-97.91

The views I express are my own, not that of my employer, a large
multinational corporation that you are familiar with.
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