G PHYSICS
G11 INFORMATION STORAGE
G11C STATIC STORES
16/00 Erasable programmable read-only memories
G11C16/02 electrically programmable
G11C16/06 Auxiliary circuits, e.g. for writing into memory
G11C16/34 Determination of programming status, e.g. threshold voltage, overprogramming or underprogramming, retention
G11C16/349 Arrangements for evaluating degradation, retention or wearout, e.g. by counting erase cycles