USB : USB Classes    USB Classes for Microcontrollers  

There are over a dozen different types of USB classes, organized by function: i.e., grouped by the kinds of devices and the things that those devices have to do, or maybe the kinds of data that those devices have to exchange with the PC Host.

This makes sense, of course: a USB disk drive is going to need to handle things like tracks and sectors of data, whereas a USB audio device will work with streams of data that represent sounds.


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