Memory apparatus which provides notification of memory capacity

Details Memory apparatus which provides notification of memory capacity Memory apparatus which provides notification of memory capacity

2008-09-10

2011-10-04

Guyton, Philip (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006100, C714S006110, C714S042000

Reexamination Certificate

active

08032783

ABSTRACT:
The service life of memory cards is to be substantially elongated against the occurrence of faulty blocks. A control logic searches blocks in a nonvolatile memory cell array for any acquired fault on the basis of a fault-inviting code in a management information section. If any faulty block is detected, the faulty block will be subjected to write/read comparison of data to judge whether or not the data in the block are normal. Any block determined to be normal will undergo rewriting of its fault-inviting code and registered as a normal block. Further, the registered block is stored into a write management table in the management area as a writable block. This enables an essentially normal block judged faulty on account of an erratic error or some other reason to be restored.

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