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USB (Universal Serial Bus) equipment and detection method thereof

A technology of equipment and resistance, which is applied in the field of USB equipment and its detection, can solve the problem of occupying pin resources and achieve the effect of saving pin resources

Active Publication Date: 2012-05-30
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defect of this detection method is: there must be an ID pin in the USB device, which occupies a pin resource of the chip of the USB device.

Method used

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  • USB (Universal Serial Bus) equipment and detection method thereof
  • USB (Universal Serial Bus) equipment and detection method thereof
  • USB (Universal Serial Bus) equipment and detection method thereof

Examples

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Embodiment Construction

[0025] In the USB device provided by the embodiment of the present invention, on the basis of the existing USB device, a pull-up resistor R2 and a switch S2 are added on the D+ data line, and a pull-up resistor R3 and a switch S3 are added on the D- data line.

[0026] The first USB device provided by the embodiment of the present invention, such as Figure 2a As shown, the USB device is a high-speed or full-speed USB device, wherein the pins of the USB device include: VBUS pins, D+ / D- pins, GND pins, and the USB device includes:

[0027] Data transceiver circuit, the output of which is connected to the D+ / D- pin of the USB device through the D+ and D- data lines;

[0028] VBUS drive control module, the output is connected to the VBUS pin of the USB device through the VBUS data line;

[0029] One end of the series branch composed of pull-up resistor R1 and controllable switch S1 is connected to the power supply VCC (such as 3.3V), and the other end is connected to the D+ data...

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Abstract

The invention relates to the field of communication equipment and discloses USB (Universal Serial Bus) equipment and a detection method thereof. The USB equipment can be detected to be host equipment or slave equipment without an ID (Identification) base pin, and thus, the base pin resources of the USB equipment are saved. The USB equipment disclosed by the invention comprises a series branch (1) consisting of a first pull-up resistor and a first switch, a series branch (2) consisting of a second pull-up resistor and a second switch, a series branch (3) consisting of a third pull-up resistor and a third switch, a series branch (4) consisting of a fourth pull-down resistor and a fourth switch, a series branch (5) consisting of a fifth pull-down resistor and a fifth switch, wherein one end of the series branch (1) is connected with a VCC (Virtual Channel Connection), the other end of the series branch (1) is connected with a D+ data line or a D- data line, one end of the series branch (2) is connected with the VCC, the other end of the series branch (2) is connected with the D+ data line, one end of the series branch (3) is connected with the VCC, the other end of the series branch (3) is connected with the D- data line, one end of the series branch (4) is grounded, the other end of the series branch (4) is connected with the D+ data line, one end of the series branch (5) is grounded, the other end of the series branch (5) is connected with the D- data line.

Description

technical field [0001] The invention relates to the field of communication equipment, in particular to a USB equipment and a detection method thereof. Background technique [0002] A USB device (Universal Serial Bus, universal serial bus) conforming to the USB2.0 specification is generally a DRD (Dual Role Device, dual-role device) device, which can be used as a master device or as a slave device. Such as figure 1 As shown, it is a schematic structural diagram of a USB device conforming to the USB2.0 specification. The connection pins of the USB device include: VBUS pins, ID pins, GND pins, and D+ / D- pins. The internal structure of the USB device includes: The data transceiver circuit, its output is connected to the D+ / D- pin through the D+, D- data lines, the VBUS drive control module is connected to the VBUS pin through the VBUS data line, the D+ data line is grounded through the pull-down resistor R4 and the switch S4, and the D - The data line is grounded through the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/267
CPCG06F13/385G06F11/267G06F13/4072G06F2213/0042
Inventor 余静黄少彬杜夔
Owner ACTIONS ZHUHAI TECH CO
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