I have a circuit where I am using a PIC18f26J11 and am quite pin (and 
space) constrained, so I'm using the PGC and PGD (RB6/RB7) pins in my 
application.   These are being used as outputs from the pic and input 
into a 3.3V ATF22LV10.

I am programming this whole thing with a CCS ICD-U64.

Having had relatively no problems with a previous prototype board, the 
new one was giving me fits with the programming - until I pulled the 
ATF22LV10 out of it's socket and bent the appropriate pins outward to 
disconnect it from the programming pins.   Now everything seems perfect.

I was under the impression that it was relatively safe to use pgc and 
pgd in a circuit, provided there wasn't a lot hanging off of them (I 
don't feel that 1 logic-level input is a lot), and that they were used 
as outputs, and that my circuit could handle the 'strangeness' of having 
something drive those pins other than the PIC.   Which I thought I had met.

Is there something obvious that I missed?

-forrest


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