Well, the RTC feature is really attractive, so having an independent power input for it is cool. The MKL25Z128VFT4 don't have that input, so the only thing you can do is to put the cpu in VLLS1 state and connect it (whole cpu) to battery (maybe second power bus with a diode?) and it should drain few μA.
Should be possible something like following? [image: Inline image 1] On Thu, Sep 12, 2013 at 5:04 AM, Ron K. Jeffries <[email protected]>wrote: > The KL2 MKL25Z128VFT4 M0+ 48 MHz 48-QFN 128 kB 16 kB USB-Reg, > ID > looks like a winner based on current information. It certainly doesn't > hurt that it costs > $2.00 > LESS than competing MCUs. Also, it has the better low-power consumption > spec. > > Unrelated [to MCU selection] question in a separate email. > > I think you are on to something with the password safe idea. Not a mega > hit, > but a nice little niche that is do-able, and just might catch on. As in > Kickstarter > is not out of the question, given a lot more work on identifying WHY > people need it > and might be motivated to invest money. If you can make money with a > retail price > NTE $50 it can work. > > Ron K Jeffries > > --- > Ron K. Jeffries > 805-567-4670 > > > > > > > On Wed, Sep 11, 2013 at 3:37 PM, Werner Almesberger < > [email protected]> wrote: > >> I wrote: >> > [ a lot ] >> >> That should of course have ended with: >> >> Any comments this far ? >> >> - Werner >> >> _______________________________________________ >> Qi Hardware Discussion List >> Mail to list (members only): [email protected] >> Subscribe or Unsubscribe: >> http://lists.en.qi-hardware.com/mailman/listinfo/discussion >> > > > _______________________________________________ > Qi Hardware Discussion List > Mail to list (members only): [email protected] > Subscribe or Unsubscribe: > http://lists.en.qi-hardware.com/mailman/listinfo/discussion > -- Felix
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