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

[Tom Cubie]

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?
>> >
>> > _______________________________________________
>> > arm-netbook mailing list arm-netbook at lists.phcomp.co.uk
>> > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook
>> > Send large attachments to arm-netbook at files.phcomp.co.uk
>>
>>
>>
>> --
>> Keep simple, stay foolish.
>>
>> _______________________________________________
>> arm-netbook mailing list arm-netbook at lists.phcomp.co.uk
>> http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook
>> Send large attachments to arm-netbook at files.phcomp.co.uk
>
>
>
> _______________________________________________
> arm-netbook mailing list arm-netbook at lists.phcomp.co.uk
> http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook
> Send large attachments to arm-netbook at files.phcomp.co.uk



-- 
Keep simple, stay foolish.