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!<br><br><div class="gmail_quote">2012/7/13 Tom Cubie <span dir="ltr"><<a href="mailto:mr.hipboi@gmail.com" target="_blank">mr.hipboi@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Fri, Jul 13, 2012 at 7:59 PM, krasi gichev <<a href="mailto:krasimirr@gmail.com">krasimirr@gmail.com</a>> wrote:<br>
> Thanks for comments, my calculations are based on specification (in<br>
> internet). As I said, they claim 18 days with 3200mAh, so this means 432<br>
> hours with 3200mAh, and this gives 7mA . My tablet is Ployer MOMO 9 variant,<br>
> built around March 2012. I can try to measure the battery current in various<br>
> modes. But this can be misleading because it might not represent the real<br>
> capabilities of the A10.<br>
> I am pretty sure that idle will never be so high as cnxsoft claims, my<br>
> tablet manages several days on stand by. If it was 0.34A it will hardly last<br>
> 10 hours. I suppose that this 0.34A is for mele or other non-portable<br>
> device.<br>
><br>
> Tom, you are saying that in suspend to RAM A10 is completely off, and this<br>
> 5mA are mainly RAM self refresh consumption? Is there something easy that<br>
> can be done to bring it a little bit down - different RAM chips (DDR3L),<br>
> different power management chip instead of AXP? In general, could we find<br>
> out how this 5mA are spread over subsystems and decide which one makes sense<br>
> to optimize?<br>
</div>What? you want to optimize further? Write a mail to<br>
<a href="mailto:service@allwinnertech.com">service@allwinnertech.com</a>, it will be forwarded to the right person to<br>
answer your question. Don't mention me, please.<br>
<div class="HOEnZb"><div class="h5">><br>
> 2012/7/13 Tom Cubie <<a href="mailto:mr.hipboi@gmail.com">mr.hipboi@gmail.com</a>><br>
>><br>
>> On Fri, Jul 13, 2012 at 1:55 PM, krasi gichev <<a href="mailto:krasimirr@gmail.com">krasimirr@gmail.com</a>> wrote:<br>
>> > I am looking into applying A10/A13 into automotive (entertaiment)<br>
>> > application. Is anybody aware how low the current consumption can go in<br>
>> > mode<br>
>> > where OS is sleeping? I mean not powered off, but booted, ready to wake<br>
>> > up<br>
>> > in several seconds, but doing nothing else beside waiting for GPIO<br>
>> > (button)<br>
>> > wake up command? Something like sleep mode of the android tablets.<br>
>> > My best estimation is based on specs of one tablet that says that it has<br>
>> > stand by time of 18 days (with 3200mAh battery). This resolves to around<br>
>> > 7mA<br>
>> > stand by consumption (this should be A10 + AXP209 total).<br>
>> When your tablet is bought? Because the new firmware of A10/A13 tablet<br>
>> supports suspend to ram, which will power off the cpu and only leave<br>
>> the dram in self refresh mode when standby. Which is typical 5mA for<br>
>> 512MB ram of two chips.<br>
>> ><br>
>> > Any input on this?<br>
>> ><br>
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>><br>
>><br>
>> --<br>
>> Keep simple, stay foolish.<br>
>><br>
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