Ryan Pogge wrote: > so the advantage is an easy way to update firmware in products, or an easy > way to develop software and reprogram without ISP.... > cool... It is certainly a time saver, especially when developing code for two or more PICs that need to communicate with each other. I'm sure I've saved days so far. One thing struck me about this approach though. You (I) tend to get a little bit slack with the code writing because it is so easy to change if a mistake is made. Previously in the program - bug - phooey - UV erase - program - bug - more phooey - UV erase etc..., you tend to be more careful about what goes on the chip because it's a pain to change it. -- Best regards Tony http://www.picnpoke.com mailto:sales@picnpoke.com