Smallest USB Analyzer with Low Speed

The project is termed as Atapchi which refers to a small fruit in Singapore since the device is probably the world’s smallest low-speed USB analyzer.

The low-speed USB specifications are fully supported by the device which can perform a capacity of 500 transactions in non-volatile memory. It is powered using the bus and can be triggered externally with one device to dedicate the capturing. Other features that Atapchi possesses are the checking of data overflow, checking of stuffing bit, checking of matched CRC, and checking of signal quality.

The USB analyzer will be suitable in the development of HID class low-speed USB peripheral devices and development of small scale USB based networks. The microcontroller units that can be used with Atapchi may include the brands like, Cypress, Microchip, Motorola, St, and others.

During the modes of operation, the input of low-speed USB traffic is being recorded. This is made possible by plugging the Atapchi into a SUB self-powered hub, a USB repeater is plugged into Atapchi, and the device under development is plugged into the repeater and all traffic from/to the device is recorded. The output is obtained by downloading the data.

Rest of the project