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USB device and data transfer method thereof

一种通用串行总线、数据传输方法的技术，应用在电数字数据处理、气候可持续性、仪器等方向，能够解决降低主机效能、影响使用者体验等问题，达到提升主机效能、提升使用者体验、缩短传输延迟的效果

Active Publication Date: 2020-09-04
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the packet P3 is a time-critical packet (must be sent to the host as soon as possible), such a transmission mechanism may affect the user experience or reduce the performance of the host

Method used

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  • USB device and data transfer method thereof
  • USB device and data transfer method thereof
  • USB device and data transfer method thereof

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Embodiment Construction

[0015] The technical terms in the following description refer to the customary terms in this technical field. If some terms are explained or defined in this manual, the explanations of these terms shall be based on the descriptions or definitions in this manual.

[0016] The disclosed content of the present invention includes the USB device and the data transmission method of the USB device. Since some components included in the USB device of the present invention may be known components individually, the details of the known components will be omitted in the following description without affecting the full disclosure and practicability of the device invention. In addition, part or all of the process of the data transmission method of the USB device of the present invention can be in the form of software and / or firmware, and can be executed by the USB device of the present invention or its equivalent device, without affecting the sufficient nature of the method invention. Unde...

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Abstract

The invention provides a USB device and a data transfer method thereof. The USB device is coupled to a host and transfers at least one packet to the host. The USB device includes a memory, a USB controller, and a transfer management circuit. The memory stores packets. The USB controller is configured to transfer the packets to the host. The transfer management circuit is coupled between the memoryand the USB controller and configured to sequentially read the packets from the memory and sequentially transfer the packets to the USB controller, and to perform the following operations: ending thedata transfer when a stored content of the memory does not meet a condition for continuing packet transfer; or ending the data transfer when a last transferred packet meets a preset condition and a next packet that follows the last transferred packet does not meet the preset condition.

Description

technical field [0001] The invention relates to a universal serial bus (Universal Serial Bus, USB), in particular to a universal serial bus device and a data transmission method thereof. Background technique [0002] In the actual operation of the Universal Serial Bus, the aggregation method is usually used to transmit the data in the device to the host via the USB, so as to reduce the number of times of data transfer, thereby reducing the host processor ( For example, the burden on the central processing unit, microcontroller unit or microcontroller, etc.) and increase the transmission volume per unit time. The device must wait for the host to initiate the transfer before it can start transferring data. [0003] figure 1 Display the content of a USB transfer (USB transfer) according to the existing transfer mechanism. The host starts transmission at time T0, and the device starts to transmit packets P1, P2, P3, ... in sequence until the accumulated transmission volume re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/38G06F13/42
CPCG06F13/4282G06F13/385G06F2213/0042G06F13/1668G06F13/4295G06F13/28G06F13/26
Inventor 翁而咨黄振庭朱世强刘松高张加易
Owner REALTEK SEMICON CORP