[Arm-netbook] rk3399 what full schematics does lkcl want?

[Allan Mwenda]

Hi Luke ive been doing some googling and found this
https://drive.google.com/drive/mobile/folders/0B7HO8lbGgAqAT1pZQTBxM3gzRFk
Are any of these files useful?

On 19 May 2017 20:20:31 GMT+03:00, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>> To undertake such a design reference design is needed. Without
>reference
>> design it is virtually impossible or so time consuming that it makes
>no
>> sense to even start. Luke pointed out some of most difficult parts
>that
>> include memory design but also all other high speed parts (hdmi, usb
>etc..)
>> then power section position i.e. position of capacitors, positions of
>power
>> supply ic, then how to route ever increasing number of lines and so
>on. Even
>> with well documented producers like TI or Freescale with all
>documentation
>> and all reference cad designs it is hard.
>
> yyep.  usually i now just take a reference design and, as best i can,
>change as little as possible.  on the RK3388 PCB i had to rotate the
>entire Power Management block - ICs, wires, power planes - by 90
>degrees, to shoe-horn it into the available space.  it worked.  saved
>a *massive* amount of time, not having to redesign a power layout that
>is known to work.
>
> and you know what? it worked!  the power section worked perfectly,
>first time.  ok, so i shorted out some of the inductors and blew up
>$200 worth of components, on one of the boards, but hey, omelettes and
>eggs... :)
>
>l.
>
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