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

[Razvan Musaloiu-E.]

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