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:
Aug. 13, 2002
Filed:
Apr. 14, 1999
Keigo Ejiri, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A peripheral device and peripheral device control method assure the immediacy of status information while opening the greatest possible bandwidth when communicating status information using a USB interface enabling simultaneous access to a plurality of peripheral devices. A first transfer function enables sending status information to a peripheral device such as a printer using the USB bulk transfer type, and a second transfer function enables sending status information using the USB interrupt transfer type. Status information sent in response to a host request where the host can control the timing of status information transfers is sent by bulk transfer using the first transfer function, thereby assuring bandwidth for bulk transfers. Autonomous status information communicated at a timing unknown to the host is communicated by the second transfer function using the short transfer period interrupt transfer type, thereby assuring the immediate communication of the status information.