+ /** Determines the number of bytes received by the CDC interface from the host, waiting to be read. This indicates the number
+ * of bytes in the OUT endpoint bank only, and thus the number of calls to \ref CDC_Device_ReceiveByte() which are guaranteed to
+ * succeed immediately. If multiple bytes are to be received, they should be buffered by the user application, as the endpoint
+ * bank will not be released back to the USB controller until all bytes are read.