Wouter van Ooijen wrote:
> But Olin, did you realy say you are using the programmer-PIC and the
> programmed-PIC at different Vcc's with only a series resistor to
> prevent touble? Naughty naughty you!

Well, um, yeah.  Note that PGC and PGD are always held low unless Vdd is up
and stable.  This means there is no chance of parasitic SCR latchup.  But
yes, there will be some current thru the protection diode of the target chip
when being run at a low Vdd level.

However, all the tests I reported yesterday were with the target Vdd level
set to 5V, so this was not an issue in that case.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body