Invention Grant
- Patent Title: Communication apparatus and method for communicating with an external device through USB interface using a high-speed or low-speed communication mode
- Patent Title (中): 使用高速或低速通信模式通过USB接口与外部设备进行通信的通信装置和方法
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Application No.: US13159937Application Date: 2011-06-14
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Publication No.: US08527669B2Publication Date: 2013-09-03
- Inventor: Hiroki Okada
- Applicant: Hiroki Okada
- Applicant Address: JP Tokyo
- Assignee: Alpine Electronics, Inc.
- Current Assignee: Alpine Electronics, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Brinks Hofer Gilson & Lione
- Priority: JP2010-184819 20100820
- Main IPC: G06F13/14
- IPC: G06F13/14
Abstract:
A communication speed control application sets the initial communication mode of the USB controller to a full speed mode through a USB driver. If a data transfer start request is received from a USB device using application and if the requested communication speed is a high speed communication mode, the communication speed mode of the USB controller is changed to a high speed mode through the USB driver. The USB application estimates the transfer rate required for the data transfer to be executed and, if the estimated transfer rate is higher than the full speed mode or the transfer rate resulting from subtraction of a predetermined margin from the full speed, the requested communication speed is set to the high speed or is set to full speed otherwise.
Public/Granted literature
- US20120047294A1 COMMUNICATION APPARATUS Public/Granted day:2012-02-23
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