On Jun 24, 2005, at 12:40 AM, Chen Xiao Fan wrote:
>
> My list of requirement:
> 1) packaging not bigger than 5mmx5mm
>
Ah, well, you are looking for different parts than me.  Part of my
problem with (eg) ARMs is the "unfriendly" packaging they come in.
I've got some sample LPC2130s (?) from Philips.  Lovely part.  Lots
of MIPS, lots of memory, lots of IO.  Then I tried to lay out a sort
of development board for it :-(  It'd be easy in four layers, I guess;
it's got those power and ground connections on every side of the QFP,
which makes it a real PITA to route signals around...

BillW
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist