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. 08, 2005
Filed:
Aug. 28, 2001
Naohisa Suzuki, Kanagawa, JP;
Atsushi Nakamura, Kanagawa, JP;
Naohisa Suzuki, Kanagawa, JP;
Atsushi Nakamura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
If a block read cannot be used to read out from a configuration ROM information, the number of times of issue of a quadlet read request increases. This degrades the processing efficiently of a device that issues the request. In addition, the bus occupation ratio of a 1394 serial bus by the request becomes high, and the speed of processing through the 1394 serial bus decreases. To solve these problems, information stored in the configuration ROM area of a device is read out, and it is determined on the basis of the readout information that configuration information identical to the configuration ROM information is stored in an address area (block readable area) different from the configuration ROM area, the offset is changed, and the configuration information is read out from the address area different from the configuration ROM area.