Uwe Klein wiederling at googlemail.com
Wed Aug 20 22:24:46 CEST 2008

On 8/20/08, Andy Green <andy at openmoko.com> wrote:

>  Yes, but the datasheet does not have all the info.  There are various
>  mask-programmed options on our variant I don't know are listed anywhere
>  externally.  But the basic deal is it switches on a bunch of regulators
>  all at the same moment with a high current limit pretty much
>  guaranteeing major dip in the rail that supplies them, when that rail is
>  fed from USB with a 500mA limit itself and the battery.  If the battery
>  isn't "there" enough to support the supply rail (or at all) then the
>  system fails to start up even.
Explains a bit why the batlevel is a jojo.

Is that supplemental info available somewhere?

The sensible thing to do is raise a minimal system and then
power up units one by one.  Isn't ARM fully static?
i.e. could i have the cpu running from rom and some sram
in bits and bouts when "switched off"?

I'le read up a bit and then come back to you if I have a good idea.


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