dram refresh

from The Free On-line Dictionary of Computing (8 July 2008)

DRAM refresh

   <storage> The operation which cycles through a {DRAM} reading
   each row and writing it back again to compensate for the
   gradual leakage of charge from the {capacitors} which store
   the data.  This may be done by the {CPU} but is often done by
   a dedicated {memory controller}.

   (1997-02-23)