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Device for identifying type of USB equipment interface and terminal equipment

A device interface and identification device technology, applied in the field of USB interfaces, can solve the problems of re-identification of external USB device interfaces, uncorrectable errors, and rising costs for terminal solution manufacturers.

Active Publication Date: 2020-10-23
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing technology is based on the BC1.2 protocol circuit module in the USB specification, which requires that each mobile terminal device must add the circuit module when designing the solution, which directly results in an increase in the cost of the terminal solution manufacturer.
[0011] At the same time, part of the integrated BC1.2 protocol circuit module scheme does not open the control authority of the module, so that when the BC1.2 protocol detection error occurs, the terminal cannot actively re-identify the interface type of the external USB device, and the error cannot be corrected. Charging current matching error

Method used

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  • Device for identifying type of USB equipment interface and terminal equipment
  • Device for identifying type of USB equipment interface and terminal equipment
  • Device for identifying type of USB equipment interface and terminal equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a device for identifying a type of a USB device interface, which is used for identifying the type of an external USB device interface. refer to figure 2 , the external USB device 2 includes a USB device interface 201, and the USB device interface 201 includes a VBUS signal line, a DP signal line, a DM signal line, and a GND signal line. Among them, the VBUS signal line is the USB power line; the DP signal line is the USB data line + (or represented by "D+"); the DM signal line is the USB data line - (or represented by "D-"); the GND signal line is the USB Ground signal line, GND signal line is grounded.

[0042] The device for identifying the type of the USB device interface includes an enumeration unit 101 , a first comparison unit 102 , and a control unit 103 .

[0043] The enumeration unit 101 is electrically connected with the DP signal line and the DM signal line, and the enumeration unit 101 is used to initiate an enumeration operation ...

Embodiment 2

[0055] This embodiment provides a device for identifying a type of a USB device interface, which is used for identifying the type of an external USB device interface. refer to Figure 4 , the external USB device 2 includes a USB device interface 201, and the USB device interface 201 includes a VBUS signal line, a DP signal line, a DM signal line, and a GND signal line. Among them, the VBUS signal line is the USB power line; the DP signal line is the USB data line + (or represented by "D+"); the DM signal line is the USB data line - (or represented by "D-"); the GND signal line is the USB Ground signal line, GND signal line is grounded.

[0056] The device for identifying the type of the USB device interface includes an enumeration unit 101 , a first comparison unit 102 , a control unit 103 , and a second comparison unit 104 .

[0057] The enumeration unit 101 is electrically connected with the DP signal line and the DM signal line, and the enumeration unit 101 is used to ini...

Embodiment 3

[0069] This embodiment provides a terminal device. refer to Image 6 , the terminal device includes the device for identifying the type of the USB device interface in Embodiment 1 or Embodiment 2.

[0070] When an external USB device is connected to the USB device interface type identification device of the terminal device in this embodiment through its USB device interface, the USB device interface type identification device identifies the USB device interface type of the external USB device. For the specific identification process, refer to Embodiment 1 or Embodiment 2, which will not be repeated here.

[0071] Based on the result of the enumeration operation, combined with the judgment result of the voltage value on the DM signal line and the reference value, the terminal device in this embodiment can quickly identify the type of the USB device interface.

[0072] As an optional implementation manner, the terminal device of this embodiment includes a USB communication mod...

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Abstract

The invention discloses a device for identifying the type of a USB equipment interface and terminal equipment. The device for identifying the type of the USB equipment interface comprises an enumeration unit, a first comparison unit and a control unit, the enumeration unit is electrically connected with a DP signal line and a DM signal line; the enumeration unit is used for initiating enumerationoperation and outputting an enumeration result; the first comparison unit is electrically connected with the DM signal line; and the first comparison unit is used for comparing the voltage of the DM signal line with a first reference voltage to output a first comparison result; and the control unit identifies the type of the USB equipment interface according to the enumeration result and the firstcomparison result. According to the technical schemes, the type of the USB equipment interface is identified based on the result of the enumeration operation in combination with the judgment result of a voltage value on the DM signal line and a reference value.

Description

technical field [0001] The invention belongs to the technical field of USB (Universal Serial Bus, universal serial bus) interface, and in particular relates to an identification device and a terminal equipment of a USB device interface type. Background technique [0002] With the continuous evolution of battery technology and charging technology, the scale of rechargeable mobile terminals continues to expand, and more and more terminal products have changed from wired to wireless. At the same time, with the increasing demand for battery capacity and battery life of mobile terminals In order to avoid the safety risk and efficiency risk caused by the charging current mismatch between the charging device and the battery, it is necessary to distinguish different charging devices to adapt to the appropriate charging current. recharging current. [0003] USB interface technology was first used in the computer field, and is currently widely used in mobile terminals such as mobile ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/30G06F13/42H02J7/00
CPCG06F11/3041G06F13/4282H02J7/00032H02J2207/30
Inventor 徐超董泰安香妹房柏阳
Owner SPREADTRUM COMM (SHANGHAI) CO LTD