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From:	Kai-Martin Knaak <knaak AT iqo DOT uni-hannover DOT de>
Subject:	Re: [geda-user] ATXmega symbols
Date:	Tue, 27 Jan 2015 02:15:24 +0100
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karl AT aspodata DOT se wrote:

> ATXmegaA1.sym:
> 
> wget http://www.atmel.com/dyn/resources/prod_documents/doc8067.pdf
> ... ERROR 404: Not Found

corrected.
Thank you for the report.


> But perhaps you would like to do a version of
> ATXmegaA4.sym
> ATXmegaC4.sym
> ATXmegaD4.sym
> 
> with the same symbol size and pin layout (except where missing)
> as the '3 chip, so you could start with a '4 symbol,
> and when need arises simply exchange the '4 symbol with the '3 symbol,
> and vice versa --- as drop in replacements in the schematics.

... and make the '3 symbol so that it is a '1 symbol sans the additional 
pins of the larger package... Hmm. This would allow for a neat upgrade.  
But symbols for the 44 pin package would be rather over-sized.

How about this: 
 * Start with a 'monolithic' symbol for the 44 pin package
 * The symbol for the 64 pin package is split in two. One sub symbol 
contains all the pins that this version shares with the '4 chip. And a 
second sub symbol for the pins of the additional ports.
 * The symbol for the 100 pin package is split in three. The first two for 
the pins that match the 64 pin version. And a third sub symbol for the 
rest. 

That way, the additional pins of larger versions can be placed out of the 
way of nets connected to the lower port pins.

---<)kaimartin(>---
-- 
Kai-Martin Knaak                                  tel: +49-511-762-2895
Universität Hannover, Inst. für Quantenoptik      fax: +49-511-762-2211	
Welfengarten 1, 30167 Hannover           http://www.iqo.uni-hannover.de
GPG key:    http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get

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