文件名称：usb communication devices protocol
文件大小：2.52MB
文件格式：RAR
更新时间：2013-02-11 19:07:52
usb communication devices
There are three classes that make up the definition for communication devices: the Communication Device Class, Communication Interface Class and the Data Interface Class. The Communication Device Class is a device level definition and is used by the host to properly identify a communication device that may present several different types of interfaces. The Communication Interface Class defines a general-purpose mechanism that can be used to enable all types of communication services on the Universal Serial Bus (USB). The Data Interface Class defines a generalpurpose mechanism to enable bulk or isochronous transfer on the USB when the data does not meet the requirements for any other class.
【文件预览】：
Communications Device Class
----cdc_wmc10.zip(716KB)
----CDC_EEM10.pdf(865KB)
----cdc_wmc10.pdf(1.44MB)
----usbcdc11.pdf(604KB)