EEPROM memory card device having defect relieving means
US6161195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1993 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | May 7, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/765
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention provides a memory card device using an EEPROM as a semiconductor memory. When a data write-in defective area is detected in the storage area of the EEPROM, a space area is retrieved from the storage area of the EEPROM as a relieving area and data to be written into the data write-in defective area is written into the relieving area. Then, when the relieving area becomes full and a data write-in defective area is detected in the storage area of the EEPROM, another space area is retrieved from the storage area of the EEPROM as a new relieving area and data to be written into the data write-in defective area is written into the new relieving area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.