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Interface circuit compatible with USB interfaces of various types

A technology of USB interface and interface circuit, which is applied in the field of interface circuit, can solve the problem of single type of USB interface circuit, etc., and achieve the effects of improving utilization rate and flexibility, reducing quantity and reducing cost

Active Publication Date: 2014-03-26
FUJIAN XINO COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the existing USB interface circuit type is single

Method used

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  • Interface circuit compatible with USB interfaces of various types

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Embodiment Construction

[0014] Such as figure 1 As shown, an interface circuit compatible with various types of USB interfaces includes a power switch unit 1, a diode D1, a P-channel field effect transistor Q1, a processor U1, and a USB interface socket J1. The power input terminal of the power switch unit is connected to the The positive pole of the power supply is connected, the power output terminal of the power switch unit 1 is connected to the positive pole of the diode D1 and the gate of the P-channel field effect transistor Q1, the control terminal (USB_DRV) of the power switch unit is connected to the processor U1, and the negative pole of the diode D1 It is connected with the source of the P-channel field effect transistor Q1 and the power terminal of the USB interface seat J1, the drain (USB_DET) of the P-channel field effect transistor Q1 is connected with the processor U1, and the power switch unit is used under the control of the control terminal Control whether the output terminal of th...

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Abstract

The invention provides an interface circuit compatible with USB interfaces of various types. The interface circuit comprises a power switch unit, a diode, a P-channel field-effect transistor, a processor and an USB interface socket. The power input end of the power switch unit is connected with the positive pole of a power source, the power output end of the power switch unit is connected with the positive pole of the diode and the grid of the P-channel field-effect transistor, the control end of the power switch unit is connected with the processor, the negative pole of the diode is connected with the source of the P-channel field-effect transistor and the power end of the USB interface socket, and the drain of the P-channel field-effect transistor is connected with the processor. The power switch unit is used for controlling whether the power output end outputs voltages of the power input end or not under the control of the control end. The interface circuit is compatible with the USB interfaces, and the problem that the type of the existing USB interface circuit is single is solved.

Description

technical field [0001] The invention relates to an interface circuit compatible with multiple USB interface types. Background technique [0002] The existing USB interface circuit simply uses one of the USB_HOST, USB_DEVICE or USB_OTG interfaces, so the type of peripherals used is relatively single, especially for devices using the USB_OTG interface, a special USB_OTG data cable must be equipped for use. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an interface circuit compatible with various USB interface types. The problem that the existing USB interface circuit type is single is solved. [0004] The present invention is achieved like this: [0005] An interface circuit compatible with multiple USB interface types, characterized in that it includes a power switch unit, a diode, a P-channel field effect transistor, a processor and a USB interface seat, the power input end of the power switch unit is connect...

Claims

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Application Information

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IPC IPC(8): G06F13/40
Inventor 蔡钰铖
Owner FUJIAN XINO COMM TECH
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