Semiconductor storage device and method of controlling it
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 12, 2000
Grant Date -
N/A
app pub date -
Feb 23, 1998
filing date -
Aug 6, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The aim is to improve reliability and life of a semiconductor storage device using memory elements for which deterioration is a problem. In a semiconductor disk device equipped with a flash memory section 110 having memory elements M(0).about.M(9) having a plurality of sectors used as ordinary sectors or spare sectors, and a disk controller section 120 that performs data writing/reading in respect of memory elements M(0).about.M(9) in accordance with address information input from outside, there are provided a data error information management table 127 that stores for each memory element the situation regarding occurrence of write/read error of memory elements M(0).about.M(9), a micro CPU 131 that detects deterioration of memory elements in accordance with the situation regarding occurrence of write/read error stored in data error information management table 127, and an address conversion table 128 that effects conversion of address information such that memory elements M(0).about.M(9) for which deterioration has been detected by micro CPU 131 are not used.
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Patent Citation Ranking
- 149 Citation Count
- G11C Class
- 97.95 % this patent is cited more than
- 25 Age