[Arm-netbook] EOMA/CF idea

[Baybal Ni]

But you can always try waffle design, it's much more cheaper than pop.

On 3 January 2012 16:03, Baybal Ni <nikulinpi at gmail.com> wrote:
> moreover, I doubt that there are POPs for allwinner already.
>
> On 3 January 2012 09:02, Vladimir Pantelic <vladoman at gmail.com> wrote:
>> Gordan Bobic wrote:
>>>   On Tue, 03 Jan 2012 17:45:15 +0100, Vladimir Pantelic
>>>   <vladoman at gmail.com>  wrote:
>>>>  lkcl luke wrote:
>>>>>  On Tue, Jan 3, 2012 at 3:13 PM, Vladimir
>>>>>  Pantelic<vladoman at gmail.com>   wrote:
>>>>>>   lkcl luke wrote:
>>>>>>
>>>>>>>      hardkernel got away with 42x25mm for goodness sake, and that
>>>>>>>  was
>>>>>>>   mostly single-sided!  B2B connectors on the other side.
>>>>>>>
>>>>>>>  http://www.hardkernel.com/renewal_2011/products/prdt_info.php?g_code=G129705564426
>>>>>>>
>>>>>>>      but, they had to do a 10 (possibly 12-layer) board to get
>>>>>>>  everything
>>>>>>>   into that space.
>>>>>>
>>>>>>   and POP, so no SDRAM routing....
>>>>>
>>>>>    good point! hmmm.... maybe there's an advantage to POP after
>>>>>  all...
>>>>
>>>>  in saving board space, there is. But I don't think there is non-LPDDR
>>>>  POP
>>>>  anyway...
>>>
>>>   I don't really see a problem with POP, given that the RAM is soldered
>>>   on anyway. If you can max out the capability of the SoC in terms of RAM
>>>   it can handle, and you can do it using a POP arrangement, then it's a
>>>   great idea. Sure, the ICs might be a bit more expensive, but it removes
>>>   a lot of scope for mistakes in terms of trace lengths and timing issues,
>>>   so it is probably worth it - not to mention that it makes things much
>>>   more compact.
>>>
>>>   The only case where it's an issue is where it isn't possible to get a
>>>   big enough RAM chip. But if your SoC can only handle a gig and you can
>>>   get a gig POP chip, go for it. :)
>>
>> I don't see a problem with POP either, except for the fact that I know
>> only LPDDR POP and not ordinary DDR3 POP.... And you surely don't want
>> LPDDR due to the extremely high price...
>>
>>
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