[Arm-netbook] micro desktop

[Luke Kenneth Casson Leighton]

On Fri, May 30, 2014 at 12:31 PM, Stéphane Goujet
<stephane.goujet at wanadoo.fr> wrote:
> On Fri, 30 May 2014, Luke Kenneth Casson Leighton wrote:
>
>> On Thu, May 29, 2014 at 11:20 PM, Stéphane Goujet
>> <stephane.goujet at wanadoo.fr> wrote:
>>>
>>> On Thu, 29 May 2014, Luke Kenneth Casson Leighton wrote:
>>>
>>>> BOM and schematic PDF are here, review appreciated.
>>>
>>>   I can get the BOM, but not the PDF :
>>> You don't have permission to access
>>
>> sorted.
>
>
>   Thanks.
>
>   A few quick remarks:
>
> *1* ACIN: should be renamed DCIN, I guess.
>
> *2* PW_EN: when connected to U9 its wire has an output symbol. It should be
> an input symbol.
>
> *3* PW_EN: not generated anywhere yet.
>
> *4* resistors around U9: R53 and R54 have very high values (they are usually
> chosen around the range 10k-100k, not 100k-1M). Was there an advise to do
> so, or a reference design doing so ?

 finally got round to looking at this, yes it's the reference design.
the values are chosen to give the voltage required, there is a table
(and a calculation) in the ref. design.

> *5* RESET circuit: I do not quite understand it. First, because VCC-3V3
> depends on PW_EN (U9 switching regulator). Second, because you seem to
> assert RESET (RESET#=0) when PW_EN==1: is this what you really want ? Third,
> because... what is RESET# used for ?

 i'm going to remove it.  poweroff will be "reset".