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Architecture
8-2 ARCHITECTURE
Figure 8-2 shows the general architecture between the host and the device using CDC
available from Micriμm.
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Figure 8-2 General Architecture between a Host and Micriμm’s CDC
The host operating system (OS) enumerates the device using the control endpoints. Once the
enumeration phase is done, the host can configure the device by sending class-specific requests
to the Communications Class Interface (CCI) via the control endpoints. The class-specific
requests vary according to the CDC subclasses. Micriμm’s CDC base class offers the possibility to
allocate an interrupt endpoint for event notification, depending on the subclass needs.
Following enumeration and configuration of the device, the host can start the transmission/
reception of data to/from the device using the bulk endpoints belonging to the Data Class
Interface (DCI). Isochronous endpoints are not supported in the current implementation.
The CDC base class enables you to have several DCIs along with the CCI. The application
can communicate with the host using the communication API offered by the CDC subclass.
119
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