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USB device testing module, USB device and testing method thereof

A test mode, test data technology, applied in error detection/correction, instruments, electrical digital data processing, etc., can solve the problems of low efficiency, difficult operation and maintenance, high cost of test equipment, and achieve the effect of low cost

Inactive Publication Date: 2009-05-06
ACTIONS SEMICONDUCTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the controller, transmitter, and receiver of the USB device all contain analog circuits, they cannot be tested by simply testing digital circuits during mass production testing, and must rely on external testing equipment such as oscilloscopes and signal generators. This test method belongs to the technology known to those of ordinary skill in the art, and will not be repeated here. The cost of the test equipment is relatively high, the test steps are relatively complicated, the efficiency is low, and it is not easy to operate and maintain.

Method used

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  • USB device testing module, USB device and testing method thereof

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Embodiment Construction

[0029] Referring to the accompanying drawings, the figure discloses a circuit structure block diagram of a preferred embodiment of the USB device of the present invention, including a test mode controller 1, a test data generator 2, a data comparator 3, a USB controller 4, a transmitter 5, a receiver device 6, external controller 7, USB interface 8 and multiplexer 9,10. For the sake of clarity, thick solid lines in the figure represent data signal transmission lines, while relatively thin solid lines represent control signal transmission lines. Arrows indicate the direction of signal transmission. The connection relationship and working mode of each component will be described in detail below in conjunction with the diagram.

[0030] The USB device shown in the figure has two working modes, one is the test working mode during testing, and the other is the data transmission mode during normal use.

[0031] Under the data transmission mode of normal use, test mode controller 1...

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Abstract

The invention relates to a testing module of USB device, a USB devices and its testing method. Its main principle is that it tests a USB device via a USB controller of the USB device, a transmitter, a receiver, an integrated test data generator, a data comparison and a test mode controller.

Description

technical field [0001] The invention relates to an improved USB device, a USB device testing module and a testing method for the USB device. Background technique [0002] USB (Universal Serial Bus, Universal Serial Bus) is a widely used data transmission standard, and all USB devices adopting this standard include standard USB devices. A USB device generally includes a transmitter, a receiver, a USB controller, and a USB interface, and the USB controller controls the transmitter or receiver to send or receive data from the USB interface. [0003] Usually, after the USB device is manufactured, it is necessary to test whether its working performance is perfect. The primary focus is to test whether it can work normally, and the most important part of normal work is that the transmitter or receiver of the USB device can be completely and correctly. The data is sent or received. Therefore, testing the accuracy of data sending or receiving is the most critical link in product tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/267
Inventor 方亮
Owner ACTIONS SEMICONDUCTOR