What is a USB analyzer?

A USB analyzer is a specialized tool for analyzing and debugging USB (Universal Serial Bus) communication. This device monitors data exchanges between USB devices and hosts, detecting the content, protocols, timing, and errors in the data transfer. USB analyzers are essential for identifying both hardware and software issues and are commonly used in the development and testing of USB devices.

By using a USB analyzer, developers can ensure the accuracy of USB communication, track down the causes of errors, and easily troubleshoot issues. For example, if a USB driver is not functioning properly or a connected device encounters communication errors, the analyzer can help pinpoint the issue. It can also analyze high-speed and low-speed transfers as well as hub behavior, contributing to product quality improvement.

Application of USB analyzer

１．Analyzing USB Device Connection Errors: Using a USB analyzer, the communication between a USB flash drive and a computer is monitored to ensure it works correctly. When the device is not recognized, the analyzer identifies a communication protocol mismatch as the cause of the connection error.
２．Debugging USB Drivers: When a newly developed USB driver fails to function correctly, a USB analyzer is used to examine the data transfer in detail. Errors during transfer are detected, and the driver bug is fixed, allowing the device to work properly.
３．Verifying High-Speed Transfers: A USB 3.0 device is tested for high-speed data transfer using a USB analyzer. When the transfer rate is found to be lower than expected, an analysis reveals that incorrect hardware settings were responsible for the transfer errors.

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