Accelerated fatigue testing

摘要

A memory such as a FeRAM implements accelerated fatigue operations that simultaneously change the storage state of large numbers of memory cells and can be rapidly repeated. In one embodiment, the FeRAM includes multiple segments with plate lines in each segment being isolated from plate lines in other segments. A first fatigue operation uses standard read/write decoding for word lines but simultaneously activates all segments. A second fatigue operation activates all segments and all plate lines and exercises one row of memory cells in each plate line group. A third fatigue operation is similar to the second but cycles through rows in the plate line groups so that a number of repetitions of the third fatigue operation equally fatigue every FeRAM cell.