On Jun 19, 2008, at 3:28 PM, Olin Lathrop wrote:

> The point was that it's often more appropriate to get a bigger PIC  
> than to perform unnatural acts to make I/O pins peform multiple  
> function.

It's also frequently more appropriate to "expand" pin functionality  
at a level BEFORE you're down to "only one pin left."  For instance,  
when you have three pins left, it's relatively easy to expand those  
into 8, 16, or more "low speed" outputs using shift registers or SPI  
"expanders."  Likewise, there are schemes for expanding input pins  
using A-D converters that are much more straight-forward than the  
schemes we're talking about for driving two LEDs from one pin....

BillW

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