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Author Topic: A10 and A20 chip differents  (Read 2328 times)

uolli

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A10 and A20 chip differents
« on: April 28, 2014, 05:04:36 AM »
Hi

I like A10-OLinuXino-LIME design, i saw lot of peoples said the A10 and A20 is same (pin to pin), so, my question is can i change the A10-OLinuXino-LIME board A10 to A20 by directly :)

Thanks
« Last Edit: April 28, 2014, 05:22:22 AM by uolli »

flobber

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Re: A10 and A20 chip differents
« Reply #1 on: April 29, 2014, 04:06:37 AM »
I *think* the pinout is compatible - there was a
post on the blog sometime ago where Olimex did
change the A10 to an A20.

BUT, and that's a big BUT: do you have any experience
desoldering and soldering a 441-pin BGA package???
If not - forget it.  Just to scare you:

  http://asset.soup.io/asset/1664/5653_5c93.jpeg

:-)

Even if you manage to successfully change the chips,
I doubt you will see any performance improvements.
The LIME has only a 16-bit memory interface.  That's
a bottleneck even for a single core - two cores will
only fight each other for the memory.

Take a real A20 board.

Ciao.

uolli

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Re: A10 and A20 chip differents
« Reply #2 on: April 29, 2014, 04:19:05 AM »
Thank you, Ciao.
Wow, who did that BGA soldering, i can't imagine people can do that :)

Yu

djrose

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Re: A10 and A20 chip differents
« Reply #3 on: April 29, 2014, 09:33:29 AM »
Flobber,

  http://asset.soup.io/asset/1664/5653_5c93.jpeg

That is one brilliant picture  :o - Thanks for sharing