Chen Xiao Fan wrote: > The 16F639 is not yet open for sampling. It is quite possible > that the device ID of 16F639 may really be the same as 16F636 > since it is really a 16F636 plus a bit more stuffs. Thnaks, in the meantime I have read the datasheets somewhat better (not only the programming specs), and you may be right. I now also remember a similar occasion with the 18F252 and 18F2539.... Regards, Rob. -- Rob Hamerling, Vianen, NL phone +31-347-322822 homepage: http://www.robh.nl/ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist