[Hardware] Re: Charging Neo Freerunner via USB port

Joachim Steiger roh at openmoko.org
Tue Apr 22 23:19:24 CEST 2008

Flemming Richter Mikkelsen wrote:
> Hello Joachim.
> Thank You for the information.
> On 4/19/08, Joachim Steiger <roh at openmoko.org> wrote:
>> the id pin is connected directly to pin9 of the pmu (adcin1)
>> in addition to that there is one resistor of 100k(1%) to gnd and one of
>> 39k(1%) to pin8 of the pmu (accsw)
>> now everyone should be able to do the math while looking at the pmu
>> datasheet. ;)
> I am looking at the PMU datasheet, and I just want to verify Your information.
> In PCF50633 at page 14 (page 119 in PCF50633 user manual), accsw is
> connected to adcin1 with a 100k resistor and adcin is connected to gnd
> with Racc. Is the information I got from You correct?
> I will look at the current kernel driver to see how it is implemented, but I
> assume ratiometric measurement is used (ref. PCD50633 user manual
> @ page 102).
to be fair, ive still not looked at the drivers or uboot, but to make
sure we do not misunderstand each other I've taken the liberty to
capture 2 small png from the V5 schems for you:

U1701 is the PMU

ps: i've changed the cc to hardware at lists. already too much noise on
community@, i doubt somebody who can use this reads that list a lot ;)


Joachim Steiger
developer relations/support
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