> And, if *no* cell at all is written > D124 times during the product's > lifetime, no refresh is needed either. > Uh, no... The correct statement here is: if the total of writes to all cells is less than D124 during the product's lifetime, no refresh is needed either. Bob Ammerman RAm Systems -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.