A system of Flash EEprom memory chips with controlling circuits serves as non-volatile memory such as that provided by magnetic disk drives. Improvements include selective multiple sector erase, in which any combinations of Flash sectors may be erased together. Selective sectors among the selected combination...http://www.google.com.tw/patents/US5535328?utm_source=gb-gplus-share專利 US5535328 - Non-volatile memory system card with flash erasable sectors of EEprom cells including a mechanism for substituting defective cells
