[Tinyos-devel] more bugging about current consumption on MicaZ in tinyos-2.x

[Joe Polastre]

LPM3 should be closer to ~5uA and LPM4 should be closer to ~2uA.

The extra 2-3uA over the micaz are consumed by two things: (1) the
ADG715 switch that isolates the USB circuitry from the batteries and
(2) the STM25P80 1MB flash has about a 1uA higher sleep current than
the Atmel flash.  But its also twice as big :)

-Joe

On 7/19/06, Razvan Musaloiu-E. <razvanm at cs.jhu.edu> wrote:
> Hi!
>
> On Wed, 19 Jul 2006, Eric Weddington wrote:
>
> > Philip Levis wrote:
> >
> > >
> > > It's very interesting, though, that the deep sleep state of the
> > > atmega128 is in practice so much lower than what the data sheets  claim
> > > (and what a lot of papers have used as the basis for  estimates). It's
> > > also much lower than what Joe reported measuring  (e.g., we're 40% of
> > > what he said is the lowest he's heard reported).
>
> The specs for Atmega128L ([1] page 323) indicate a typical <5uA in
> Power Down for Vcc = 3V.
>
> > > I'd really love to see what the msp430 pulls; I would not be  surprised
> > > if it is similarly lower (e.g., < 0.5uA). But measuring it  would be
> > > great. If only my Ubuntu drivers weren't so cranky...
> >
> > I would also be interested in a side-by-side comparison of this data.
>
> Here are some tests on 2 Telos Sky:
>
>         ACTIVE 1.83mA  1.83mA
>         LPM0   0.15mA  0.15mA
>         LPM1   0.15mA  0.15mA
>         LPM2   26.2uA  26.4uA
>         LPM3    7.0uA   7.1uA
>         LPM4    7.0uA   7.1uA
>
> Running basestation disconnected from the PC and no packets
> received I got 20.01mA and 20.17mA.
>
> Note: the input voltage was 3V and I used the same Extech multimeter as
> before.
>
> It would be great if Phil or Joe could post what values they got.
>
> [1] http://www.atmel.com/atmel/acrobat/doc2467.pdf
>
> --
> Razvan ME
>
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