G PHYSICS
G11 INFORMATION STORAGE
G11C STATIC STORES
13/00 Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
G11C13/0002 using resistive RAM [RRAM] elements
G11C13/0021 Auxiliary circuits
G11C13/0035 Evaluating degradation, retention or wearout, e.g. by counting writing cycles