[Hardware] Re: Charging Neo Freerunner via USB port

Michael Shiloh michael at openmoko.org
Tue Apr 22 17:03:57 CEST 2008


Beautifully documented. Please make a nice wiki or doc page of this and 
give me a link, I'll reference it in my quickstart guide.

Michael

Joachim Steiger wrote:
> 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 ;)
> 
> 
> 
> 
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