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:
Nov. 13, 2012
Filed:
Jan. 20, 2010
Hideki Mitsubayashi, Kanagawa, JP;
Hideki Mitsubayashi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An access key generating apparatus includes: a bit field converting unit which converts a partial bit field into a reduced bit field having a bit width shorter than a bit width of the partial bit field; an access key retaining unit which retains a plurality of access keys to control access to a memory from peripheral devices in association with each of the peripheral devices; and an indexing unit which indexes the access keys from the access key retaining unit using an index address including the reduced bit field if the conversion of the partial bit field into the reduced bit field is successful, and indexes the access keys from the access key retaining unit using an index address including the partial bit field if the conversion of the partial bit field into the reduced bit field is unsuccessful.