the "white noise" from the PN junction of a transistor is the source of a truly random number. Software can never generate a truly random number. >My question is: how to generate a "truly" random number on the application >of power. The number should not be determined upon the compilation of the >software, but should be upon the initial powerup of the chip. (Or, it >should >be determine by each individual chip.) _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.