diff --git a/demos/device/device_os_none/WinCDCdriver.inf b/demos/device/device_os_none/WinCDCdriver.inf
index 80d121757..c3662e2f7 100644
--- a/demos/device/device_os_none/WinCDCdriver.inf
+++ b/demos/device/device_os_none/WinCDCdriver.inf
@@ -86,11 +86,11 @@ ServiceBinary=%12%\%DRIVERFILENAME%.sys
 [SourceDisksFiles]
 [SourceDisksNames]
 [DeviceList]
-%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_4001, USB\VID_1FC9&PID_4001&MI_00, USB\VID_1FC9&PID_4003&MI_00, USB\VID_1FC9&PID_4005&MI_00, USB\VID_1FC9&PID_4007&MI_00, USB\VID_1FC9&PID_4009&MI_00, USB\VID_1FC9&PID_400b&MI_00, USB\VID_1FC9&PID_400d&MI_00, USB\VID_1FC9&PID_400f&MI_00, USB\VID_1FC9&PID_4011&MI_00, USB\VID_1FC9&PID_4013&MI_00, USB\VID_1FC9&PID_4015&MI_00, USB\VID_1FC9&PID_4017&MI_00, USB\VID_1FC9&PID_4019&MI_00, USB\VID_1FC9&PID_401b&MI_00, USB\VID_1FC9&PID_401d&MI_00, USB\VID_1FC9&PID_401f&MI_00, USB\VID_1FC9&PID_4021&MI_00, USB\VID_1FC9&PID_4023&MI_00, USB\VID_1FC9&PID_4025&MI_00, USB\VID_1FC9&PID_4027&MI_00, USB\VID_1FC9&PID_4029&MI_00, USB\VID_1FC9&PID_402b&MI_00, USB\VID_1FC9&PID_402d&MI_00, USB\VID_1FC9&PID_402f&MI_00, USB\VID_1FC9&PID_4031&MI_00, USB\VID_1FC9&PID_4033&MI_00, USB\VID_1FC9&PID_4035&MI_00, USB\VID_1FC9&PID_4037&MI_00, USB\VID_1FC9&PID_4039&MI_00, USB\VID_1FC9&PID_403b&MI_00, USB\VID_1FC9&PID_403d&MI_00, USB\VID_1FC9&PID_403f&MI_00
+%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_4001&MI_00, USB\VID_1FC9&PID_4003&MI_00, USB\VID_1FC9&PID_4005&MI_00, USB\VID_1FC9&PID_4007&MI_00, USB\VID_1FC9&PID_4009&MI_00, USB\VID_1FC9&PID_400b&MI_00, USB\VID_1FC9&PID_400d&MI_00, USB\VID_1FC9&PID_400f&MI_00, USB\VID_1FC9&PID_4011&MI_00, USB\VID_1FC9&PID_4013&MI_00, USB\VID_1FC9&PID_4015&MI_00, USB\VID_1FC9&PID_4017&MI_00, USB\VID_1FC9&PID_4019&MI_00, USB\VID_1FC9&PID_401b&MI_00, USB\VID_1FC9&PID_401d&MI_00, USB\VID_1FC9&PID_401f&MI_00, USB\VID_1FC9&PID_4021&MI_00, USB\VID_1FC9&PID_4023&MI_00, USB\VID_1FC9&PID_4025&MI_00, USB\VID_1FC9&PID_4027&MI_00, USB\VID_1FC9&PID_4029&MI_00, USB\VID_1FC9&PID_402b&MI_00, USB\VID_1FC9&PID_402d&MI_00, USB\VID_1FC9&PID_402f&MI_00, USB\VID_1FC9&PID_4031&MI_00, USB\VID_1FC9&PID_4033&MI_00, USB\VID_1FC9&PID_4035&MI_00, USB\VID_1FC9&PID_4037&MI_00, USB\VID_1FC9&PID_4039&MI_00, USB\VID_1FC9&PID_403b&MI_00, USB\VID_1FC9&PID_403d&MI_00, USB\VID_1FC9&PID_403f&MI_00
 
 
 [DeviceList.NTamd64]
-%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_4001, USB\VID_1FC9&PID_4001&MI_00, USB\VID_1FC9&PID_4003&MI_00, USB\VID_1FC9&PID_4005&MI_00, USB\VID_1FC9&PID_4007&MI_00, USB\VID_1FC9&PID_4009&MI_00, USB\VID_1FC9&PID_400b&MI_00, USB\VID_1FC9&PID_400d&MI_00, USB\VID_1FC9&PID_400f&MI_00, USB\VID_1FC9&PID_4011&MI_00, USB\VID_1FC9&PID_4013&MI_00, USB\VID_1FC9&PID_4015&MI_00, USB\VID_1FC9&PID_4017&MI_00, USB\VID_1FC9&PID_4019&MI_00, USB\VID_1FC9&PID_401b&MI_00, USB\VID_1FC9&PID_401d&MI_00, USB\VID_1FC9&PID_401f&MI_00, USB\VID_1FC9&PID_4021&MI_00, USB\VID_1FC9&PID_4023&MI_00, USB\VID_1FC9&PID_4025&MI_00, USB\VID_1FC9&PID_4027&MI_00, USB\VID_1FC9&PID_4029&MI_00, USB\VID_1FC9&PID_402b&MI_00, USB\VID_1FC9&PID_402d&MI_00, USB\VID_1FC9&PID_402f&MI_00, USB\VID_1FC9&PID_4031&MI_00, USB\VID_1FC9&PID_4033&MI_00, USB\VID_1FC9&PID_4035&MI_00, USB\VID_1FC9&PID_4037&MI_00, USB\VID_1FC9&PID_4039&MI_00, USB\VID_1FC9&PID_403b&MI_00, USB\VID_1FC9&PID_403d&MI_00, USB\VID_1FC9&PID_403f&MI_00
+%DESCRIPTION%=DriverInstall, USB\VID_1FC9&PID_4001&MI_00, USB\VID_1FC9&PID_4003&MI_00, USB\VID_1FC9&PID_4005&MI_00, USB\VID_1FC9&PID_4007&MI_00, USB\VID_1FC9&PID_4009&MI_00, USB\VID_1FC9&PID_400b&MI_00, USB\VID_1FC9&PID_400d&MI_00, USB\VID_1FC9&PID_400f&MI_00, USB\VID_1FC9&PID_4011&MI_00, USB\VID_1FC9&PID_4013&MI_00, USB\VID_1FC9&PID_4015&MI_00, USB\VID_1FC9&PID_4017&MI_00, USB\VID_1FC9&PID_4019&MI_00, USB\VID_1FC9&PID_401b&MI_00, USB\VID_1FC9&PID_401d&MI_00, USB\VID_1FC9&PID_401f&MI_00, USB\VID_1FC9&PID_4021&MI_00, USB\VID_1FC9&PID_4023&MI_00, USB\VID_1FC9&PID_4025&MI_00, USB\VID_1FC9&PID_4027&MI_00, USB\VID_1FC9&PID_4029&MI_00, USB\VID_1FC9&PID_402b&MI_00, USB\VID_1FC9&PID_402d&MI_00, USB\VID_1FC9&PID_402f&MI_00, USB\VID_1FC9&PID_4031&MI_00, USB\VID_1FC9&PID_4033&MI_00, USB\VID_1FC9&PID_4035&MI_00, USB\VID_1FC9&PID_4037&MI_00, USB\VID_1FC9&PID_4039&MI_00, USB\VID_1FC9&PID_403b&MI_00, USB\VID_1FC9&PID_403d&MI_00, USB\VID_1FC9&PID_403f&MI_00
 
 ;------------------------------------------------------------------------------
 ;  String Definitions
diff --git a/demos/device/device_os_none/cdcd_app.c b/demos/device/device_os_none/cdcd_app.c
index 7e3010411..44e06ddf4 100644
--- a/demos/device/device_os_none/cdcd_app.c
+++ b/demos/device/device_os_none/cdcd_app.c
@@ -67,6 +67,7 @@ FIFO_DEF(fifo_serial, CDCD_APP_BUFFER_SIZE, uint8_t, true);
 
 //--------------------------------------------------------------------+
 // IMPLEMENTATION
+//--------------------------------------------------------------------+
 void cdcd_serial_app_init(void)
 {
   sem_hdl = osal_semaphore_create( OSAL_SEM_REF(cdcd_semaphore) );
@@ -82,7 +83,7 @@ void tusbd_cdc_mounted_cb(uint8_t coreid)
   tusbd_cdc_receive(coreid, serial_rx_buffer, CDCD_APP_BUFFER_SIZE, true);
 }
 
-void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes)
+void tusbd_cdc_xfer_cb(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes)
 {
   switch ( pipe_id )
   {
diff --git a/demos/device/device_os_none/keyboardd_app.c b/demos/device/device_os_none/keyboardd_app.c
index 0d62495ff..360b68f9c 100644
--- a/demos/device/device_os_none/keyboardd_app.c
+++ b/demos/device/device_os_none/keyboardd_app.c
@@ -59,9 +59,15 @@ static uint8_t keyboardd_report_count; // number of reports sent each mounted
 //--------------------------------------------------------------------+
 // tinyusb Callbacks
 //--------------------------------------------------------------------+
-void tusbd_hid_keyboard_isr(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes)
+void tusbd_hid_keyboard_cb(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes)
 {
-
+  switch(event)
+  {
+    case TUSB_EVENT_XFER_COMPLETE:
+    case TUSB_EVENT_XFER_ERROR:
+    case TUSB_EVENT_XFER_STALLED:
+    default: break;
+  }
 }
 
 void tusbd_hid_keyboard_mounted_cb(uint8_t coreid)
diff --git a/demos/device/device_os_none/moused_app.c b/demos/device/device_os_none/moused_app.c
index 4f670f109..fa1cdb13f 100644
--- a/demos/device/device_os_none/moused_app.c
+++ b/demos/device/device_os_none/moused_app.c
@@ -59,9 +59,15 @@ static uint8_t moused_report_count; // number of reports sent each mounted
 //--------------------------------------------------------------------+
 // tinyusb Callbacks
 //--------------------------------------------------------------------+
-void tusbd_hid_mouse_isr(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes)
+void tusbd_hid_mouse_cb(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes)
 {
-
+  switch(event)
+  {
+    case TUSB_EVENT_XFER_COMPLETE:
+    case TUSB_EVENT_XFER_ERROR:
+    case TUSB_EVENT_XFER_STALLED:
+    default: break;
+  }
 }
 
 void tusbd_hid_mouse_mounted_cb(uint8_t coreid)
diff --git a/demos/device/device_os_none/tusb_config.h b/demos/device/device_os_none/tusb_config.h
index 8fa5e315a..cdb15e366 100644
--- a/demos/device/device_os_none/tusb_config.h
+++ b/demos/device/device_os_none/tusb_config.h
@@ -86,8 +86,8 @@
 #define TUSB_CFG_DEVICE_HID_KEYBOARD  0
 #define TUSB_CFG_DEVICE_HID_MOUSE     0
 #define TUSB_CFG_DEVICE_HID_GENERIC   0
-#define TUSB_CFG_DEVICE_MSC           1
-#define TUSB_CFG_DEVICE_CDC           0
+#define TUSB_CFG_DEVICE_MSC           0
+#define TUSB_CFG_DEVICE_CDC           1
 
 
 //--------------------------------------------------------------------+
diff --git a/demos/device/device_os_none/tusb_descriptors.c b/demos/device/device_os_none/tusb_descriptors.c
index d3edfed76..fbdc0b5f7 100644
--- a/demos/device/device_os_none/tusb_descriptors.c
+++ b/demos/device/device_os_none/tusb_descriptors.c
@@ -140,10 +140,6 @@ tusb_descriptor_device_t app_tusb_desc_device =
     .bDeviceClass       = TUSB_CLASS_MISC,
     .bDeviceSubClass    = MISC_SUBCLASS_COMMON,
     .bDeviceProtocol    = MISC_PROTOCOL_IAD,
-  #elif TUSB_CFG_DEVICE_CDC
-    .bDeviceClass       = TUSB_CLASS_CDC,
-    .bDeviceSubClass    = 0x00,
-    .bDeviceProtocol    = 0x00,
   #else
     .bDeviceClass       = 0x00,
     .bDeviceSubClass    = 0x00,
@@ -198,7 +194,6 @@ app_descriptor_configuration_t app_tusb_desc_configuration =
     #endif
 
     #if TUSB_CFG_DEVICE_CDC
-    // USB CDC Serial Interface
     //------------- CDC Communication Interface -------------//
     .cdc_comm_interface =
     {
diff --git a/demos/device/device_os_none/tusb_descriptors.h b/demos/device/device_os_none/tusb_descriptors.h
index bacbdd144..957661534 100644
--- a/demos/device/device_os_none/tusb_descriptors.h
+++ b/demos/device/device_os_none/tusb_descriptors.h
@@ -65,8 +65,8 @@
 #define TOTAL_INTEFACES            (2*TUSB_CFG_DEVICE_CDC + TUSB_CFG_DEVICE_HID_KEYBOARD + TUSB_CFG_DEVICE_HID_MOUSE + \
                                     TUSB_CFG_DEVICE_HID_GENERIC + TUSB_CFG_DEVICE_MSC)
 
-// Interface Assosication Descriptor is required when enable CDC with any other class
-#define IAD_DESC_REQUIRED ( TUSB_CFG_DEVICE_CDC && (TOTAL_INTEFACES > 2) )
+// Interface Assosication Descriptor is required when enable CDC
+#define IAD_DESC_REQUIRED           ( TUSB_CFG_DEVICE_CDC )
 
 //--------------------------------------------------------------------+
 // Endpoints Address & Max Packet Size
diff --git a/tinyusb/class/cdc_device.c b/tinyusb/class/cdc_device.c
index 64b3e1227..bb3e86db4 100644
--- a/tinyusb/class/cdc_device.c
+++ b/tinyusb/class/cdc_device.c
@@ -211,7 +211,7 @@ tusb_error_t cdcd_control_request(uint8_t coreid, tusb_control_request_t const *
   return TUSB_ERROR_NONE;
 }
 
-void cdcd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
+tusb_error_t cdcd_xfer_cb(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
 {
   cdcd_data_t const * p_cdc = &cdcd_data[edpt_hdl.coreid];
 
@@ -219,10 +219,12 @@ void cdcd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_b
   {
     if ( endpointhandle_is_equal(edpt_hdl, p_cdc->edpt_hdl[pipeid]) )
     {
-      tusbd_cdc_xfer_isr(edpt_hdl.coreid, event, pipeid, xferred_bytes);
-      return;
+      tusbd_cdc_xfer_cb(edpt_hdl.coreid, event, pipeid, xferred_bytes);
+      break;
     }
   }
+
+  return TUSB_ERROR_NONE;
 }
 
 #endif
diff --git a/tinyusb/class/cdc_device.h b/tinyusb/class/cdc_device.h
index 6de9ab194..bb0c7644c 100644
--- a/tinyusb/class/cdc_device.h
+++ b/tinyusb/class/cdc_device.h
@@ -66,7 +66,7 @@ tusb_error_t tusbd_cdc_receive(uint8_t coreid, void * p_buffer, uint32_t length,
 //--------------------------------------------------------------------+
 void tusbd_cdc_mounted_cb(uint8_t coreid);
 void tusbd_cdc_unmounted_cb(uint8_t coreid);
-void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes);
+void tusbd_cdc_xfer_cb(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes);
 //void tusbd_cdc_line_coding_changed_cb(uint8_t coreid, cdc_line_coding_t* p_line_coding);
 
 //--------------------------------------------------------------------+
@@ -77,7 +77,7 @@ void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id
 void cdcd_init(void);
 tusb_error_t cdcd_open(uint8_t coreid, tusb_descriptor_interface_t const * p_interface_desc, uint16_t *p_length);
 tusb_error_t cdcd_control_request(uint8_t coreid, tusb_control_request_t const * p_request);
-void cdcd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes);
+tusb_error_t cdcd_xfer_cb(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes);
 void cdcd_close(uint8_t coreid);
 
 #endif
diff --git a/tinyusb/class/hid_device.c b/tinyusb/class/hid_device.c
index 8872f042b..65d41dc0c 100644
--- a/tinyusb/class/hid_device.c
+++ b/tinyusb/class/hid_device.c
@@ -82,7 +82,7 @@ tusb_error_t tusbd_hid_keyboard_send(uint8_t coreid, hid_keyboard_report_t const
 
   hidd_interface_t * p_kbd = &keyboardd_data; // TODO &keyboardd_data[coreid];
 
-  ASSERT_STATUS( dcd_pipe_xfer(p_kbd->ept_handle, p_report, sizeof(hid_keyboard_report_t), false) ) ;
+  ASSERT_STATUS( dcd_pipe_xfer(p_kbd->ept_handle, p_report, sizeof(hid_keyboard_report_t), true) ) ;
 
   return TUSB_ERROR_NONE;
 }
@@ -108,7 +108,7 @@ tusb_error_t tusbd_hid_mouse_send(uint8_t coreid, hid_mouse_report_t const *p_re
 
   hidd_interface_t * p_mouse = &moused_data; // TODO &keyboardd_data[coreid];
 
-  ASSERT_STATUS( dcd_pipe_xfer(p_mouse->ept_handle, p_report, sizeof(hid_mouse_report_t), false) ) ;
+  ASSERT_STATUS( dcd_pipe_xfer(p_mouse->ept_handle, p_report, sizeof(hid_mouse_report_t), true) ) ;
 
   return TUSB_ERROR_NONE;
 }
@@ -232,13 +232,19 @@ tusb_error_t hidd_open(uint8_t coreid, tusb_descriptor_interface_t const * p_int
         p_hid->interface_number = p_interface_desc->bInterfaceNumber;
         p_hid->report_length    = p_desc_hid->wReportLength;
 
+        #if TUSB_CFG_DEVICE_HID_KEYBOARD
         if (p_interface_desc->bInterfaceProtocol == HID_PROTOCOL_KEYBOARD)
         {
           tusbd_hid_keyboard_mounted_cb(coreid);
-        }else
+        }
+        #endif
+
+        #if TUSB_CFG_DEVICE_HID_MOUSE
+        if (p_interface_desc->bInterfaceProtocol == HID_PROTOCOL_MOUSE)
         {
           tusbd_hid_mouse_mounted_cb(coreid);
         }
+        #endif
       }
       break;
 
@@ -255,23 +261,23 @@ tusb_error_t hidd_open(uint8_t coreid, tusb_descriptor_interface_t const * p_int
   return TUSB_ERROR_NONE;
 }
 
-void hidd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
+tusb_error_t hidd_xfer_cb(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes)
 {
 #if TUSB_CFG_DEVICE_HID_KEYBOARD
   if ( endpointhandle_is_equal(edpt_hdl, keyboardd_data.ept_handle) )
   {
-    tusbd_hid_keyboard_isr(edpt_hdl.coreid, event, xferred_bytes);
-    return;
+    tusbd_hid_keyboard_cb(edpt_hdl.coreid, event, xferred_bytes);
   }
 #endif
 
 #if TUSB_CFG_DEVICE_HID_MOUSE
   if ( endpointhandle_is_equal(edpt_hdl, moused_data.ept_handle) )
   {
-    tusbd_hid_mouse_isr(edpt_hdl.coreid, event, xferred_bytes);
-    return;
+    tusbd_hid_mouse_cb(edpt_hdl.coreid, event, xferred_bytes);
   }
 #endif
+
+  return TUSB_ERROR_NONE;
 }
 
 #if defined(CAP_DEVICE_ROMDRIVER)
diff --git a/tinyusb/class/hid_device.h b/tinyusb/class/hid_device.h
index 8eebd1824..edef9e25a 100644
--- a/tinyusb/class/hid_device.h
+++ b/tinyusb/class/hid_device.h
@@ -91,7 +91,7 @@ tusb_error_t tusbd_hid_keyboard_send(uint8_t coreid, hid_keyboard_report_t const
  *              - TUSB_EVENT_XFER_ERROR   : previously scheduled transfer encountered a transaction error.
  *              - TUSB_EVENT_XFER_STALLED : previously scheduled transfer is stalled by device.
  */
-void tusbd_hid_keyboard_isr(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes);
+void tusbd_hid_keyboard_cb(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes);
 void tusbd_hid_keyboard_mounted_cb(uint8_t coreid);
 void tusbd_hid_keyboard_unmounted_cb(uint8_t coreid);
 
@@ -141,7 +141,7 @@ tusb_error_t tusbd_hid_mouse_send(uint8_t coreid, hid_mouse_report_t const *p_re
  *              - TUSB_EVENT_XFER_ERROR   : previously scheduled transfer encountered a transaction error.
  *              - TUSB_EVENT_XFER_STALLED : previously scheduled transfer is stalled by device.
  */
-void tusbd_hid_mouse_isr(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes);
+void tusbd_hid_mouse_cb(uint8_t coreid, tusb_event_t event, uint32_t xferred_bytes);
 void tusbd_hid_mouse_mounted_cb(uint8_t coreid);
 void tusbd_hid_mouse_unmounted_cb(uint8_t coreid);
 
@@ -158,7 +158,7 @@ void tusbd_hid_mouse_unmounted_cb(uint8_t coreid);
 void hidd_init(void);
 tusb_error_t hidd_open(uint8_t coreid, tusb_descriptor_interface_t const * p_interface_desc, uint16_t *p_length);
 tusb_error_t hidd_control_request(uint8_t coreid, tusb_control_request_t const * p_request);
-void hidd_isr(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes);
+tusb_error_t hidd_xfer_cb(endpoint_handle_t edpt_hdl, tusb_event_t event, uint32_t xferred_bytes);
 void hidd_close(uint8_t coreid);
 
 #endif
diff --git a/tinyusb/device/usbd.c b/tinyusb/device/usbd.c
index 90a7247e6..a2da447d1 100644
--- a/tinyusb/device/usbd.c
+++ b/tinyusb/device/usbd.c
@@ -70,7 +70,7 @@ static usbd_class_driver_t const usbd_class_drivers[TUSB_CLASS_MAPPED_INDEX_STAR
         .init            = hidd_init,
         .open            = hidd_open,
         .control_request = hidd_control_request,
-        .xfer_cb    = hidd_isr,
+        .xfer_cb         = hidd_xfer_cb,
         .close           = hidd_close
     },
 #endif
@@ -81,7 +81,7 @@ static usbd_class_driver_t const usbd_class_drivers[TUSB_CLASS_MAPPED_INDEX_STAR
         .init            = mscd_init,
         .open            = mscd_open,
         .control_request = mscd_control_request,
-        .xfer_cb    = mscd_xfer_cb,
+        .xfer_cb         = mscd_xfer_cb,
         .close           = mscd_close
     },
 #endif
@@ -92,7 +92,7 @@ static usbd_class_driver_t const usbd_class_drivers[TUSB_CLASS_MAPPED_INDEX_STAR
         .init            = cdcd_init,
         .open            = cdcd_open,
         .control_request = cdcd_control_request,
-        .xfer_cb    = cdcd_isr,
+        .xfer_cb         = cdcd_xfer_cb,
         .close           = cdcd_close
     },
 #endif