diff --git a/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
index dfa67206b..115c88165 100644
--- a/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
+++ b/hw/bsp/nutiny_nuc121s/nutiny_nuc121.c
@@ -29,6 +29,17 @@
 #include "clk.h"
 #include "sys.h"
 
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USBD_IRQHandler(void)
+{
+  tud_irq_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
 #define LED_PORT              PB
 #define LED_PIN               4
 #define LED_PIN_IO            PB4
diff --git a/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
index dfa67206b..115c88165 100644
--- a/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
+++ b/hw/bsp/nutiny_nuc125s/nutiny_nuc125.c
@@ -29,6 +29,17 @@
 #include "clk.h"
 #include "sys.h"
 
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USBD_IRQHandler(void)
+{
+  tud_irq_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
 #define LED_PORT              PB
 #define LED_PIN               4
 #define LED_PIN_IO            PB4
diff --git a/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
index bdc154559..214873f8c 100644
--- a/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
+++ b/hw/bsp/nutiny_nuc126v/nutiny_nuc126.c
@@ -29,6 +29,18 @@
 #include "clk.h"
 #include "sys.h"
 
+
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USBD_IRQHandler(void)
+{
+  tud_irq_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
 #define LED_PORT              PC
 #define LED_PIN               9
 #define LED_PIN_IO            PC9
diff --git a/hw/bsp/nutiny_sdk_nuc120/nutiny_sdk_nuc120.c b/hw/bsp/nutiny_sdk_nuc120/nutiny_sdk_nuc120.c
index 0650a4e3a..906d44454 100644
--- a/hw/bsp/nutiny_sdk_nuc120/nutiny_sdk_nuc120.c
+++ b/hw/bsp/nutiny_sdk_nuc120/nutiny_sdk_nuc120.c
@@ -29,6 +29,17 @@
 #include "clk.h"
 #include "sys.h"
 
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USBD_IRQHandler(void)
+{
+  tud_irq_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
 #define LED_PORT     PB
 #define LED_PIN      0
 #define LED_PIN_IO   PB0
diff --git a/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c b/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
index 3a341de9a..9018e698d 100644
--- a/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
+++ b/hw/bsp/nutiny_sdk_nuc505/nutiny_sdk_nuc505.c
@@ -27,6 +27,17 @@
 #include "bsp/board.h"
 #include "NUC505Series.h"
 
+//--------------------------------------------------------------------+
+// Forward USB interrupt events to TinyUSB IRQ Handler
+//--------------------------------------------------------------------+
+void USBD_IRQHandler(void)
+{
+  tud_irq_handler(0);
+}
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM
+//--------------------------------------------------------------------+
 #define LED_PORT     PC
 #define LED_PIN      3
 #define LED_STATE_ON 0
diff --git a/src/portable/nuvoton/nuc120/dcd_nuc120.c b/src/portable/nuvoton/nuc120/dcd_nuc120.c
index f85af6d1e..e7bb4d431 100644
--- a/src/portable/nuvoton/nuc120/dcd_nuc120.c
+++ b/src/portable/nuvoton/nuc120/dcd_nuc120.c
@@ -306,8 +306,10 @@ void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
   ep->CFG |= USBD_CFG_CSTALL_Msk;
 }
 
-void USBD_IRQHandler(void)
+void dcd_irq_handler(uint8_t rhport)
 {
+  (void) rhport;
+
   uint32_t status = USBD->INTSTS;
   uint32_t state = USBD->ATTR & 0xf;
 
@@ -424,10 +426,4 @@ void USBD_IRQHandler(void)
   USBD->INTSTS = status & enabled_irqs;
 }
 
-void dcd_irq_handler(uint8_t rhport)
-{
-  (void) rhport;
-  USBD_IRQHandler();
-}
-
 #endif
diff --git a/src/portable/nuvoton/nuc121/dcd_nuc121.c b/src/portable/nuvoton/nuc121/dcd_nuc121.c
index fbc2361a8..e9fbc2220 100644
--- a/src/portable/nuvoton/nuc121/dcd_nuc121.c
+++ b/src/portable/nuvoton/nuc121/dcd_nuc121.c
@@ -312,8 +312,10 @@ void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
   ep->CFG |= USBD_CFG_CSTALL_Msk;
 }
 
-void USBD_IRQHandler(void)
+void dcd_irq_handler(uint8_t rhport)
 {
+  (void) rhport;
+
   uint32_t status = USBD->INTSTS;
 #ifdef SUPPORT_LPM
   uint32_t state = USBD->ATTR & 0x300f;
@@ -440,10 +442,4 @@ void USBD_IRQHandler(void)
   USBD->INTSTS = status & enabled_irqs;
 }
 
-void dcd_irq_handler(uint8_t rhport)
-{
-  (void) rhport;
-  USBD_IRQHandler();
-}
-
 #endif
diff --git a/src/portable/nuvoton/nuc505/dcd_nuc505.c b/src/portable/nuvoton/nuc505/dcd_nuc505.c
index c448577ae..bb010a408 100644
--- a/src/portable/nuvoton/nuc505/dcd_nuc505.c
+++ b/src/portable/nuvoton/nuc505/dcd_nuc505.c
@@ -430,8 +430,10 @@ void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
   }
 }
 
-void USBD_IRQHandler(void)
+void dcd_irq_handler(uint8_t rhport)
 {
+  (void) rhport;
+
   uint32_t status = USBD->GINTSTS;
 
   /* USB interrupt */
@@ -641,10 +643,4 @@ void USBD_IRQHandler(void)
   }
 }
 
-void dcd_irq_handler(uint8_t rhport)
-{
-  (void) rhport;
-  USBD_IRQHandler();
-}
-
 #endif