The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 1998
Filed:
Aug. 28, 1996
Kazuo Konishi, Yokohama, JP;
Shimpei Yoshioka, Yokohama, JP;
Koji Maruyama, Yokohama, JP;
Tomoyuki Maekawa, Yokohama, JP;
Toshiaki Sato, Fukaya, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A memory card apparatus has an EEPROM as a semiconductor memory. Each time data is written in the EEPROM, link data representing a recording location of the data is written and managed in a link table. The link table has a flag region with a flag which is set when data write in the EEPROM is requested and is reset when the link data has completely been written in the link table. In case of card removal during operation or power failure, the flag set in the flag region of the link table is not reset and remains. Thus, by checking the flag area of the link table, the occurrence of card removal during operation or power failure can be detected, and various countermeasures can be conducted. Thus, the correspondency between the recorded contents in the EEPROM and the contents in the link table can be maintained as much as possible.