next-generation (now) MPU discussion / Backup battery on PMU only

joerg at joerg at
Fri Apr 25 14:00:20 CEST 2008

Am Fr  25. April 2008 schrieb Werner Almesberger:
> - we give the MPU its own LDO in the PMU that is kept active even in
>   PMU.Standby (this has to be configured by software, so this has to be
>   an LDO that is enabled by default when going NoPower->Standby->Active
>   and it has to have the right voltage. In out PCF50633-04, this would
>   be LDO1 or LDO4, both 2.8V, or LDO6 at 3.0V. LDO6 has the lowest
>   quiescent current of the three.)

Sounds perfect to me. LDO6.Also is pretty beyond the 2.7V for flash, we need 
for some of the 430 models. 
Had no look at he specs though thus far, to do my bugbuster-job.


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