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:
May. 23, 2006
Filed:
May. 09, 2002
Takuya Ishida, Sapporo, JP;
Yoshiyuki Kamihara, Sapporo, JP;
Takuya Ishida, Sapporo, JP;
Yoshiyuki Kamihara, Sapporo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A buffer is provided with a CBW area (a randomly accessible command storage area) and an EParea (data storage area set to FIFO), when a CBW and data are allocated as informations to be transferred through one end point EP. When a phase switches from a USB command phase (command transport) to a data phase (data transport), the information write area is switched from the CBW area to the EParea and OUT data transferred from the host to the end point EPis written into the EParea. The area switches from the CBW area to the EParea on condition that an acknowledgment has returned to the host in the command phase. In case of a toggle missing, area switching does not occur even if ACK is returned.