[Arm-netbook] Sleep (stand by) power consumption of A10/A13 device?

[krasi gichev]

No, it is no so important, 5mA are good enough :-). Don't worry, I know you
had troubles because of your willingness to help here!

2012/7/13 Tom Cubie <mr.hipboi at gmail.com>

> On Fri, Jul 13, 2012 at 7:59 PM, krasi gichev <krasimirr at gmail.com> wrote:
> > Thanks for comments, my calculations are based on specification (in
> > internet). As I said, they claim 18 days with 3200mAh, so this means 432
> > hours with 3200mAh, and this gives 7mA . My tablet is Ployer MOMO 9
> variant,
> > built around March 2012. I can try to measure the battery current in
> various
> > modes. But this can be misleading because it might not represent the real
> > capabilities of the A10.
> > I am pretty sure that idle will never be so high as cnxsoft claims, my
> > tablet manages several days on stand by. If it was 0.34A it will hardly
> last
> > 10 hours. I suppose that this 0.34A is for mele or other non-portable
> > device.
> >
> > Tom, you are saying that in suspend to RAM A10 is completely off, and
> this
> > 5mA are mainly RAM self refresh consumption? Is there something easy that
> > can be done to bring it a little bit down - different RAM chips (DDR3L),
> > different power management chip instead of AXP? In general, could we find
> > out how this 5mA are spread over subsystems and decide which one makes
> sense
> > to optimize?
> What? you want to optimize further? Write a mail to
> service at allwinnertech.com, it will be forwarded to the right person to
> answer your question. Don't mention me, please.
> >
> > 2012/7/13 Tom Cubie <mr.hipboi at gmail.com>
> >>
> >> On Fri, Jul 13, 2012 at 1:55 PM, krasi gichev <krasimirr at gmail.com>
> wrote:
> >> > I am looking into applying A10/A13 into automotive (entertaiment)
> >> > application. Is anybody aware how low the current consumption can go
> in
> >> > mode
> >> > where OS is sleeping? I mean not powered off, but booted, ready to
> wake
> >> > up
> >> > in several seconds, but doing nothing else beside waiting for GPIO
> >> > (button)
> >> > wake up command? Something like sleep mode of the android tablets.
> >> > My best estimation is based on specs of one tablet that says that it
> has
> >> > stand by time of 18 days (with 3200mAh battery). This resolves to
> around
> >> > 7mA
> >> > stand by consumption (this should be A10 + AXP209 total).
> >> When your tablet is bought? Because the new firmware of A10/A13 tablet
> >> supports suspend to ram, which will power off the cpu and only leave
> >> the dram in self refresh mode when standby. Which is typical 5mA for
> >> 512MB ram of two chips.
> >> >
> >> > Any input on this?
> >> >
> >> > _______________________________________________
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> >>
> >>
> >> --
> >> Keep simple, stay foolish.
> >>
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> >
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>
> --
> Keep simple, stay foolish.
>
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