[oshug] Parallella: spare chips
Jason Flynn G7OCD
flynnjs at yahoo.com
Tue Oct 30 14:53:02 UTC 2012
On 30/10/2012 08:25, Andrew Back wrote:
> The Adapteva website says these are "324-ball 15x15mm flip-chip BGA"
>  but doesn't mention the pitch? Perhaps it's implicit — my
> knowledge of BGA devices goes as far as appreciating that they are
> difficult for hobbyists to work with.
I wouldn't be put off this. There are many back-street
workshops that routinely remove, re-ball and resolder
BGAs on laptop motherboards, without damaging any of
the adjacent devices. Worst case, you could employ one
PCB manufacturing houses often do assembly, the board
house I use would cost you about £20 each to put 8
devices down professionally.
I have a SMD preheater and hot air rig which I do QFN
and small BGA in the "shack" at the bottom of the
garden, so I follow the "get on an solder it" brigade.
As for testing, I would stick with a JTAG boundary
scan (what it was designed for) rathet than x-raying
as x-rays can damage certain technologies.
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