Automatic detection and control device and automatic detection and control method thereof

Abstract

The invention discloses an automatic detection control device and an automatic detection control method thereof. The automatic detection control device adopts a system power signal or an external device as the power supply, and carries out a detection action when being coupled with the external device. The automatic detection control device comprises a detection module, a power management module and a control module, wherein the detection module is used for detecting whether a first power signal of the external device exists or not, and judging whether the external device is self-powered or not according to the first power signal to generate a first result; the power management module is used for preventing the first power signal from conflicting with the system power signal; and the control module is used for determining whether the power management module needs to supply power to the external device through the system power signal or not according to the first result.

Description

technical field [0001] The invention relates to an automatic detection control device and its detection control method, in particular to an automatic detection control device and its detection control method for preventing power supply conflicts. Background technique [0002] In recent years, USB (Universal Serial Bus) has provided a unified interface for connection and control between computers and different peripheral devices. Generally speaking, the computer acts as a USB host (HOST) device, and the peripheral device acts as a USB slave (SERVICE) device. The USB host device provides power to the USB slave device and transmits and receives data. [0003] However, in order to enable connection and control between different peripheral devices, the USB on the go (OTG) specification was proposed. The master-slave relationship needs to be changed. The USB connection port of a traditional USB device has only four pins, but a USB device conforming to the USB OTG specification n...

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Problems solved by technology

[0006] Therefore, one of the many purposes of the present invention is to provide an automatic detection control device and its detection method to solve the power supply conflict between the two parties when a device that has a power supply and does not determine the master-slave relationship is coupled with an external device. problems to improve the absence of known technologies

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