+                       #if defined(ARCH_HAS_FLASH_ADDRESS_SPACE)
+                               uint8_t CDC_Device_SendString_P(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+                                                               const char* const String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+                       #endif
+
+                       /** Sends a given data buffer from PROGMEM space to the attached USB host, if connected. If a host is not connected when the
+                        *  function is called, the string is discarded. Bytes will be queued for transmission to the host until either the endpoint
+                        *  bank becomes full, or the \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows
+                        *  for multiple bytes to be packed into a single endpoint packet, increasing data throughput.
+                        *
+                        *  \pre This function must only be called when the Device state machine is in the \ref DEVICE_STATE_Configured state or
+                        *       the call will fail.
+                        *
+                        *  \note This function does not exist on architectures that do not have a separate flash memory space.
+                        *
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.
+                        *  \param[in]     Buffer            Pointer to a buffer containing the data to send to the device.
+                        *  \param[in]     Length            Length of the data to send to the host.
+                        *
+                        *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
+                        */
+                       #if defined(ARCH_HAS_FLASH_ADDRESS_SPACE)
+                               uint8_t CDC_Device_SendData_P(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
+                                                             const void* const Buffer,
+                                                             const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+                       #endif