> I wasn't able to find the early errata sheets online. Do you by any chance > have a document number? Now that you mention it, I didn't get it on line either. It was handed to me by a Microchip sales guy when we were considering using the 18F452. The list of bugs in the pre-release silicon was so bad that we decided to prototype with the 16F877 with reduced features until the real 18F452s were available. That was about a year ago. I just looked and couldn't find it. I'm pretty sure I tossed it in disgust a while back. You must have gotten something similar when you got your pre-release chips. Maybe your local Microchip guy still has a copy. However, I would toss all pre-release versions of the 18F452 and replace them with the real production parts now that they are finally available. There may be more gotchas lurking that you haven't bumped into yet. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics