[Arm-netbook] A minimal A10 SBC

luke.leighton luke.leighton at gmail.com
Fri Mar 29 05:34:46 GMT 2013


On Fri, Mar 29, 2013 at 2:04 AM, Ajith Kumar <bpajith at gmail.com> wrote:
>
>> ground layer next to the DDR3 tracks to get the characteristic impedance
>>
>> > correct and also to give good return path. Something like:
>> > L1 : tracks , L2 : ground, L3 : power, L4 : tracks, L5 : GND, L6 :
>> > tracks
>>
>>  that looks about right.
>>
>> > Since you already have done it,
>>
>>  i have not.  what i have done is asked SoC manufacturers to supply
>>
>> full EVB schematics.  i have then NOT ONCE MADE ONE SINGLE ALTERATION
>> TO THE DDR3 LAYOUT, precisely because i know that it is beyond my
>
>
> Hi Luke,  This is the only uncertain stuff I think, I go by the old saying
> "When you don't get what you want, what you get is experience". I have no
> other option.

 :)

> If you find time, please check for mistakes in the DDR part of the
> schematic. I have uploaded with some more changes. I have the A13 core board
> from WITS, that gives some idea about the AXP209 layout.

 lovely.



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