expanded view of components

Werner Almesberger werner at openmoko.org
Thu May 14 15:39:11 CEST 2009

Dave Ball wrote:
> I've gone back over the CPU pintypes, and corrected a few in the  
> attached patch.

Applied, thanks ! I've also updated

By the way, I've asked the Openmoko admins if it's possible to give
you checkin access to svn.openmoko.org/trunk/gta02-core so that we
don't an intermediary.

> I realised that I made an implicit assumption about a large number of  
> pins that are type t8 or t12.  These are nearly identical bi-directional  
> pins, that seem to also be tri-state in output mode.  I've labeled all  
> those as BiDi - but would these be better as 3-state?

I think BiDi is fine - being able to be an input implies that it
can be 3-stated. Exceptions to this rule are generally remembered
as accidents, e.g., the unfortunate AUX LED in old GTA02s :-)

3-state seems to mean that it's an output that can also be set to
High-Z, but that it can never be an input.

I think it would be nice if one could tell KiCad that a pin will
only be used in a restricted way to avoid unnecessary warnings.

> /CE & /WP don't seem to be in the table of i/o types I've been using  
> (table 1-2), but 'input' seemed right to me...

Yup, that looks good.

- Werner

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