I was developing code with a 16C71 (EPROM device) and suddenly it stop to allow write cycles. Does anyone knows how many write cycles a EPROM device can support? Could the uv intensity speed up the degradation of the internal insulating? Microchip (or any other) has some app note about it? see you, beto. ____________________________________________________________________ Get your own FREE, personal Netscape WebMail account today at http://webmail.netscape.com.