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USB defines class code information that is used to identify a device's functionality and to nominally load a device driver based on that functionality.

This field identifies the release of the USB Specification with which the device and its descriptors are compliant. 4, bDeviceClass, uint8_t, 1, Class. Class ...

bDeviceClass. The class code indicating the behavior of this device. DriverKit 19.0+.

2021/12/14 -The device class field of the device descriptor (bDeviceClass) must contain a value of zero, or the class (bDeviceClass), subclass ...

USB-IF protocol code for the device, qualified by the bDeviceClass and bDeviceSubClass values. uint8_t, bMaxPacketSize0. Maximum packet size for endpoint 0.

FTDI have defined our own device class, so FTDI devices return a 0 for the bDeviceClass (Vendor class). The class cannot be configured by the designer. Our ...

Subclass code (assigned by the USB-IF). These codes are qualified by the value of the bDeviceClass field. ... These codes are qualified by the values of the ...

2012/1/9 -The USB specification defines a composite class device as a device whose device-descriptor fields for device class ( bDeviceClass ) and device ...

2024/1/17 -Note the bDeviceClass, bDeviceSubClass, and bDeviceProtocol values. Those values indicate that the device contains one or more USB interface ...

bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0. So it appears to be doing what the spec says, however its not using the ...