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Frequency adjustment method and device and slave

A frequency adjustment and operating frequency technology, applied in the field of communication, can solve the problems of high cost and high cost of USB slave devices, and achieve the effect of reducing the cost of slave devices and ensuring normal communication

Pending Publication Date: 2022-07-05
合肥宏晶半导体科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of a high-cost crystal oscillator as the frequency input source, the cost of the USB slave device is high

Method used

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  • Frequency adjustment method and device and slave
  • Frequency adjustment method and device and slave
  • Frequency adjustment method and device and slave

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Embodiment Construction

[0025] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, and they should be considered to be exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted from the following description for clarity and conciseness.

[0026] Various embodiments of the present disclosure and various features of the embodiments may be combined with each other without conflict.

[0027] As used herein, the term "and / or" includes any and all combinations of one or more of the associ...

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Abstract

The invention provides a frequency adjustment method and device and a slave. The method comprises the following steps: determining a sending interval of a detection packet sent by a host; determining a first working frequency of the host according to the sending interval; under the condition that the first working frequency and the second working frequency of the slave do not meet the frequency matching condition, generating a frequency control signal; and the frequency control signal is sent to the oscillation device, so that the oscillation device adjusts the working parameters according to the frequency control signal, and the slave is adjusted to the third working frequency from the second working frequency. According to the embodiment of the invention, the cost of the slave can be reduced, and the working frequency of the slave is ensured to be matched with the working frequency of the host.

Description

technical field [0001] The present disclosure relates to the field of communication technologies, and in particular, to a frequency adjustment method, device and slave. Background technique [0002] The master and slave devices based on Universal Serial Bus (Universal Serial Bus, USB) use asynchronous mode to transmit data, which has higher requirements on the precision of frequency or clock. In a slave device, in order to generate a high-precision frequency that matches the master, an external crystal oscillator is usually used as the frequency input source, and the final frequency is obtained through a phase-locked loop (PLL) frequency multiplication and other methods. Since a high-cost crystal oscillator is used as the frequency input source, the cost of the USB slave device is high. SUMMARY OF THE INVENTION [0003] The present disclosure provides a frequency adjustment method, device and slave. [0004] In a first aspect, the present disclosure provides a frequency ...

Claims

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Application Information

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IPC IPC(8): H04L7/033H03L7/099
CPCH04L7/033H03L7/099
Inventor 杨新约刘伟
Owner 合肥宏晶半导体科技有限公司