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:
Sep. 09, 2008
Filed:
Nov. 17, 2004
Kuniaki Matsuda, Sapporo, JP;
Kuniaki Matsuda, Sapporo, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Aspects of the invention can provide a data transfer control device and electronic equipment that can achieve to switch supplying power through a VBUS. The transfer controller can transmit a switching request packet of supplying power through a VBUS to a type-B plug connected side (a type-B device side). In the case when the transfer controller can receive a switching acknowledgment packet of supplying power through the VBUS, the transfer controller can instruct a power supply switching circuit to stop a power supply through the VBUS. A monitoring the voltage level of the VBUS can be stopped before stopping the power supply through the VBUS. A transfer controller can receive the switching request packet of supplying power through the VBUS from the type-A plug connected side (a type-A device side). In the case when the transfer controller acknowledges the switching, the transfer controller can transmit the switching acknowledgment packet of supplying power through the VBUS, and instructs the power supply switching circuit to start supplying power through the VBUS. The monitoring the voltage level of the VBUS can be stopped before starting the power supply through the VBUS. The switching request packet and switching acknowledgment packets can be transmitted using a control transfer.