On Wed, 21 Aug 2002, Tony Pan wrote: >>> So what does UL1998 (?) specify ? > 1:2^N where N is the number of rom >bits you have ? ;-) >>> Are they saying that 'just testing it' is enough or is there a target >number ? > >Depend on the type of your application, the UL1998 requires you to do either >16-bit or 32-bit CRC. > >If you don't do CRC, you can choose to do other tests on their list. You can >even come up with your own test as long as you can prove that your test is >equivalent to those on their list. Ok, now I understand. I have not read UL1998 (I don't need it - yet). Are the used CRC algorythms patented by anyone ? Just asking. Peter -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.