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:
Jun. 07, 2005
Filed:
Mar. 23, 2001
Kosuke Matsunaga, Oita, JP;
Hiroyuki Kanai, Shiojiri, JP;
Shinichiro Fujita, Beppu, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The objective of the present invention is to provide a data transfer control device, information storage medium, and electronic equipment that can relieve the inconveniences caused whenever a reset that clears node topology information occurs. If a bus reset occurs during a data transfer period in a data transfer control device in accordance with the IEEE 1394 standard, and also the content of ORBs before and after the bus reset is the same, data transfer restarts from a resumption at the point at which the bus reset occurred, thus preventing duplicate printing in a printer. Whenever a bus reset occurs during a data transfer period, the continuation flag is set to on. The first command block ORB comprising a print command that transferred in after the bus reset is used in the comparison with the pre-bus-reset ORB. When no ACK is returned from the initiator because of a bus reset, a transition to a dead state occurs. The part of transfer data from a scanner that has not yet been transferred to the initiator at point at which the bus reset occurred is retained without being destroyed.