* This event is time-critical; each packet within the request transaction must be acknowledged or\r
* sent within 50ms or the host will abort the transfer.\r
*\r
+ * The library interally handles all standard control requests with the exceptions of SYNC FRAME,\r
+ * SET DESCRIPTOR and SET INTERFACE. These and all other non-standard control requests will be left\r
+ * for the user to process via this event if desired. If not handled in the user application, requests\r
+ * are automatically STALLed.\r
+ *\r
* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see\r
* \ref Group_USBManagement documentation).\r
*\r