USB bus interface checking device and checking method

Abstract

A USB bus interface detection device comprises a USB transfer unit, a displaying and alarming unit and a short-circuit detection unit used to detect whether the USB interface is in short circuit; wherein, the USB transfer unit is provided with an input terminal and an output terminal corresponding to the terminals of the detected USB interface; the short-circuit detection unit comprises a plurality of input terminals and at least one output terminal; the input terminals of the short-circuit detection unit are connected with the corresponding terminals of the detected USB interface through the USB transfer unit, and the output terminal of the short-circuit detection unit outputs the signal of the short-circuit detection result; the displaying and alarming unit is used to display the detection result and to make alarming caution for the short circuit. The present invention has the advantages that the design of the software and the hardware is simple, the speed is fast and the cost is low, before the detected unit is powered, the short-circuit detection of the USB bus interface is performed at first, thereby effectively guaranteeing the security of the detected unit and the detection environment; the device can also be used as a part of the USB bus interface test circuit in the production testing environment.

Description

【Technical field】 [0001] The invention relates to an electronic detection device and a detection method thereof in the technical field of communication, in particular to a USB bus interface detection device and a detection method thereof. 【Background technique】 [0002] The USB bus is widely used in the fields of communication and electronics. In the process of mass production of single boards that provide USB interfaces, it is necessary to test and verify the function and performance of this interface, so as to ensure the production quality of the USB interface functions of the single board. A conventional and simple approach in the prior art is to equip an external USB flash drive as a test environment, and judge whether the read and write operations of the single board to the USB flash drive are successful or not. However, in the actual application of this test method, since the USB interface circuit may have a short circuit (specifically, the differential signal D+ of th...

AI Technical Summary

Problems solved by technology

However, this patent has the following disadvantages: 1. It is necessary to judge the combination of short circuit and open circuit between the power supply, ground and differential signal lines one by one through software, and the test efficiency is low; 2. The device under test needs to be powered on to perform the test operation. In the case of a short circuit, the DUT will be damaged; 3. This circuit is not easy to be applied to the production test environment for further functional and performance tests on the USB interface

However, the structure design of this patented technology is complicated, and it involves the conversion of a relatively complicated state machine, and the circuit cost is relatively high; at the same time, it is not suitable for testing the data transmission performance of the USB interface in a production test environment.

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