1.2 CDC class from a particular data communication SpeakingĪs shown above, the communication section USB CDC class contains three main parts: the enumeration process, and the virtual serial data communication operation. It USB2.0 standard, and the relationship of the subclasses shown in the following figure:Īs shown above, under the USB2.0 standard defines a number of subclasses, there are audio class, CDC class, HID, printing, mass storage class, HUB, smart cards, etc., which have specific definitions in usb.org official website, where the main describes traffic class CDC. 1 USB CDC class introduces basic theoretical knowledge The relationship between the CDC class, USB2.0 standard and PSTN 1.1 USBĬDC (Communication Device Class) class is a subclass of the USB2.0 standard, defines an abstract set of associated communication devices. To see more detailed technical documentation ST can go to view, link to: This article is excerpted ST official website of "USB CDC class introductory training." I was able to organize the content is able to understand that the more practical, recorded for later review, as well as the original document to correct a clerical error in a bit.
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