Not realy answering your question, but... I do hope you have a *realy* good reason to use the now obsolet 16F84 chip. If you can, look at anyone of the newer 16F-chips, or maybe one in the 18F-series. Jan-Erik S=F6derholm -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body