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3.3. Endpoint Configuration
Table 6 illustrates the endpoint configuration for the Abstract Control Model.
Figure 2 shows a standard CDC communication flow.
Figure 2. USB CDC Communication Flow
Table 6. UART State Bitmap
Endpoint Direction Type Max Packet
Size
Description
EP0 In/Out Control 64 Standard requests, class requests.
EP1 In Interrupt 16 State notification from device to host.
EP2 In Bulk 64 Data transfer from device to host.
EP3 Out Bulk 64 Data transfer from host to device.
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