I should probably have added : Jan-Erik Soderholm XA (TN/PAC) wrote: > And, if *all* used cells are written with an intervall < D124, > you don't have to refresh anything. And, if *no* cell at all is written > D124 times during the product's lifetime, no refresh is needed either. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.