Title:
データ転送制御装置、及び電子機器
Document Type and Number:
Japanese Patent JP4063200
Kind Code:
B2
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.
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Inventors:
Kuniaki Matsuda
Application Number:
JP2003388045A
Publication Date:
March 19, 2008
Filing Date:
November 18, 2003
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G06F1/28; G06F1/26; H04L29/00
Domestic Patent References:
| JP10301899A | ||||
| JP2002095181A | ||||
| JP2002237972A | ||||
| JP2003061256A | ||||
| JP2003263245A | ||||
| JP2003263253A | ||||
| JP3979381B2 |
Attorney, Agent or Firm:
Takekoshi Noboru
Enami Tomokazu
Yasushi Kuroda
Inoue Ichi
Yukio Fuse
Mitsue Obuchi
Enami Tomokazu
Yasushi Kuroda
Inoue Ichi
Yukio Fuse
Mitsue Obuchi