diff --git a/targets/TARGET_NUVOTON/TARGET_M451/can_api.c b/targets/TARGET_NUVOTON/TARGET_M451/can_api.c
index ba43d93b0b..2625298a78 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/can_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/can_api.c
@@ -69,7 +69,7 @@
     PA0 = 0x00;
     PA1 = 0x00;   
 
-    CAN_Open((CAN_T *)obj->can, 500000, CAN_NORMAL_MODE);
+    CAN_Open((CAN_T *)NU_MODBASE(obj->can), 500000, CAN_NORMAL_MODE);
     
     can_filter(obj, 0, 0, CANStandard, 0);
  }
@@ -91,9 +91,9 @@ void can_free(can_t *obj)
 
 int can_frequency(can_t *obj, int hz)
 {
-    CAN_SetBaudRate((CAN_T *)obj->can, hz);
+    CAN_SetBaudRate((CAN_T *)NU_MODBASE(obj->can), hz);
     
-    return CAN_GetCANBitRate((CAN_T *)obj->can);
+    return CAN_GetCANBitRate((CAN_T *)NU_MODBASE(obj->can));
 }
 
 static void can_irq(CANName name, int id) 
@@ -154,7 +154,7 @@ void can_irq_init(can_t *obj, can_irq_handler handler, uint32_t id)
 
 void can_irq_free(can_t *obj)
 {
-    CAN_DisableInt((CAN_T *)obj->can, (CAN_CON_IE_Msk|CAN_CON_SIE_Msk|CAN_CON_EIE_Msk));
+    CAN_DisableInt((CAN_T *)NU_MODBASE(obj->can), (CAN_CON_IE_Msk|CAN_CON_SIE_Msk|CAN_CON_EIE_Msk));
     
     can_irq_ids[obj->index] = 0;
     
@@ -163,8 +163,9 @@ void can_irq_free(can_t *obj)
 
 void can_irq_set(can_t *obj, CanIrqType irq, uint32_t enable)
 {
+    CAN_T *can_base = (CAN_T *) NU_MODBASE(obj->can);
     
-    CAN_EnterInitMode((CAN_T*)obj->can, ((enable != 0 )? CAN_CON_IE_Msk :0) );
+    CAN_EnterInitMode(can_base, ((enable != 0 )? CAN_CON_IE_Msk :0) );
     
     
     switch (irq)
@@ -172,15 +173,15 @@ void can_irq_set(can_t *obj, CanIrqType irq, uint32_t enable)
         case IRQ_ERROR:
         case IRQ_BUS:
         case IRQ_PASSIVE:
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_EIE_Msk;
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_SIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_EIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_SIE_Msk;
             break;
         
         case IRQ_RX:
         case IRQ_TX:
         case IRQ_OVERRUN:
         case IRQ_WAKEUP:
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_SIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_SIE_Msk;
             break;
         
         default:
@@ -188,7 +189,7 @@ void can_irq_set(can_t *obj, CanIrqType irq, uint32_t enable)
     
     }
 
-    CAN_LeaveInitMode((CAN_T*)obj->can);
+    CAN_LeaveInitMode(can_base);
     
     NVIC_SetVector(CAN0_IRQn, (uint32_t)&CAN0_IRQHandler);
     NVIC_EnableIRQ(CAN0_IRQn);
@@ -205,14 +206,14 @@ int can_write(can_t *obj, CAN_Message msg, int cc)
     CMsg.DLC = msg.len;
     memcpy((void *)&CMsg.Data[0],(const void *)&msg.data[0], (unsigned int)8);
 
-    return CAN_Transmit((CAN_T *)(obj->can), cc, &CMsg);
+    return CAN_Transmit((CAN_T *)NU_MODBASE(obj->can), cc, &CMsg);
 }
 
 int can_read(can_t *obj, CAN_Message *msg, int handle)
 {
     STR_CANMSG_T CMsg;
 
-    if(!CAN_Receive((CAN_T *)(obj->can), handle, &CMsg))
+    if(!CAN_Receive((CAN_T *)NU_MODBASE(obj->can), handle, &CMsg))
     return 0;
         
     msg->format = (CANFormat)CMsg.IdType;
@@ -226,32 +227,34 @@ int can_read(can_t *obj, CAN_Message *msg, int handle)
 
 int can_mode(can_t *obj, CanMode mode)
 {
+    CAN_T *can_base = (CAN_T *) NU_MODBASE(obj->can);
+    
     int success = 0;
     switch (mode)
     {
         case MODE_RESET:
-            CAN_LeaveTestMode((CAN_T*)obj->can);
+            CAN_LeaveTestMode(can_base);
             success = 1;
             break;
         
         case MODE_NORMAL:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_BASIC_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_BASIC_Msk);
             success = 1;
             break;
         
         case MODE_SILENT:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_SILENT_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_SILENT_Msk);
             success = 1;
             break;
         
         case MODE_TEST_LOCAL:
         case MODE_TEST_GLOBAL:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_LBACK_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_LBACK_Msk);
             success = 1;
             break;
         
         case MODE_TEST_SILENT:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_SILENT_Msk | CAN_TEST_LBACK_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_SILENT_Msk | CAN_TEST_LBACK_Msk);
             success = 1;
             break;
         
@@ -267,7 +270,7 @@ int can_mode(can_t *obj, CanMode mode)
 
 int can_filter(can_t *obj, uint32_t id, uint32_t mask, CANFormat format, int32_t handle)
 {
-    return CAN_SetRxMsg((CAN_T *)(obj->can), handle , (uint32_t)format, id);
+    return CAN_SetRxMsg((CAN_T *)NU_MODBASE(obj->can), handle , (uint32_t)format, id);
 }
 
 
@@ -285,19 +288,19 @@ void can_reset(can_t *obj)
 
 unsigned char can_rderror(can_t *obj)
 {
-    CAN_T *can = (CAN_T *)(obj->can); 
+    CAN_T *can = (CAN_T *)NU_MODBASE(obj->can); 
     return ((can->ERR>>8)&0xFF);
 }
 
 unsigned char can_tderror(can_t *obj)
 {
-    CAN_T *can = (CAN_T *)(obj->can);
+    CAN_T *can = (CAN_T *)NU_MODBASE(obj->can);
     return ((can->ERR)&0xFF);
 }
 
 void can_monitor(can_t *obj, int silent)
 {
-    CAN_EnterTestMode((CAN_T *)(obj->can), CAN_TEST_SILENT_Msk);
+    CAN_EnterTestMode((CAN_T *)NU_MODBASE(obj->can), CAN_TEST_SILENT_Msk);
 }
  
 #endif // DEVICE_CAN
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/serial_api.c b/targets/TARGET_NUVOTON/TARGET_M451/serial_api.c
index 93c9df8a1b..472ffe0657 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/serial_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/serial_api.c
@@ -255,7 +255,7 @@ void serial_free(serial_t *obj)
 
 void serial_baud(serial_t *obj, int baudrate) {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     obj->serial.baudrate = baudrate;
     UART_Open((UART_T *) NU_MODBASE(obj->serial.uart), baudrate);
@@ -263,7 +263,7 @@ void serial_baud(serial_t *obj, int baudrate) {
 
 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     // TODO: Assert for not supported parity and data bits
     obj->serial.databits = data_bits;
@@ -325,7 +325,7 @@ void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, Pi
 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
 {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
     MBED_ASSERT(modinit != NULL);
@@ -515,7 +515,7 @@ int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx
                             // NUC472: End of source address
                             // M451: Start of source address
             PDMA_SAR_INC,   // Source address incremental
-            (uint32_t) obj->serial.uart,    // Destination address
+            (uint32_t) NU_MODBASE(obj->serial.uart),    // Destination address
             PDMA_DAR_FIX);  // Destination address fixed
         PDMA_SetBurstType(obj->serial.dma_chn_id_tx, 
             PDMA_REQ_SINGLE,    // Single mode
@@ -572,7 +572,7 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
             (rx_width == 8) ? PDMA_WIDTH_8 : (rx_width == 16) ? PDMA_WIDTH_16 : PDMA_WIDTH_32, 
             rx_length);
         PDMA_SetTransferAddr(obj->serial.dma_chn_id_rx,
-            (uint32_t) obj->serial.uart,    // Source address
+            (uint32_t) NU_MODBASE(obj->serial.uart),    // Source address
             PDMA_SAR_FIX,   // Source address fixed
             (uint32_t) rx,  // NOTE: 
                             // NUC472: End of destination address
@@ -593,7 +593,7 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
 void serial_tx_abort_asynch(serial_t *obj)
 {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     if (obj->serial.dma_usage_tx != DMA_USAGE_NEVER) {
         if (obj->serial.dma_chn_id_tx != DMA_ERROR_OUT_OF_CHANNELS) {
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/can_api.c b/targets/TARGET_NUVOTON/TARGET_NUC472/can_api.c
index 0f8fd1c295..ad4d30582b 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/can_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/can_api.c
@@ -75,7 +75,7 @@
     PA2 = 0x00;
     PA3 = 0x00; 
 
-    CAN_Open((CAN_T *)obj->can, 500000, CAN_NORMAL_MODE);
+    CAN_Open((CAN_T *)NU_MODBASE(obj->can), 500000, CAN_NORMAL_MODE);
     
     can_filter(obj, 0, 0, CANStandard, 0);
  }
@@ -97,9 +97,9 @@ void can_free(can_t *obj)
 
 int can_frequency(can_t *obj, int hz)
 {
-    CAN_SetBaudRate((CAN_T *)obj->can, hz);
+    CAN_SetBaudRate((CAN_T *)NU_MODBASE(obj->can), hz);
     
-    return CAN_GetCANBitRate((CAN_T *)obj->can);
+    return CAN_GetCANBitRate((CAN_T *)NU_MODBASE(obj->can));
 }
 
 static void can_irq(CANName name, int id) 
@@ -188,7 +188,7 @@ void can_irq_init(can_t *obj, can_irq_handler handler, uint32_t id)
 
 void can_irq_free(can_t *obj)
 {
-    CAN_DisableInt((CAN_T *)obj->can, (CAN_CON_IE_Msk|CAN_CON_SIE_Msk|CAN_CON_EIE_Msk));
+    CAN_DisableInt((CAN_T *)NU_MODBASE(obj->can), (CAN_CON_IE_Msk|CAN_CON_SIE_Msk|CAN_CON_EIE_Msk));
     
     can_irq_ids[obj->index] = 0;
     
@@ -202,25 +202,26 @@ void can_irq_free(can_t *obj)
 
 void can_irq_set(can_t *obj, CanIrqType irq, uint32_t enable)
 {
+    CAN_T *can_base = (CAN_T *) NU_MODBASE(obj->can);
     
-    CAN_EnterInitMode((CAN_T*)obj->can);
+    CAN_EnterInitMode((CAN_T*)can_base);
     
-    ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON ) | ((enable != 0 )? CAN_CON_IE_Msk :0);
+    ((CAN_T *)can_base)->CON = (((CAN_T *)can_base)->CON ) | ((enable != 0 )? CAN_CON_IE_Msk :0);
     
     switch (irq)
     {
         case IRQ_ERROR:
         case IRQ_BUS:
         case IRQ_PASSIVE:
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_EIE_Msk;
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_SIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_EIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_SIE_Msk;
             break;
         
         case IRQ_RX:
         case IRQ_TX:
         case IRQ_OVERRUN:
         case IRQ_WAKEUP:
-            ((CAN_T *)(obj->can))->CON = (((CAN_T *)(obj->can))->CON) |CAN_CON_SIE_Msk;
+            can_base->CON = can_base->CON |CAN_CON_SIE_Msk;
             break;
         
         default:
@@ -228,7 +229,7 @@ void can_irq_set(can_t *obj, CanIrqType irq, uint32_t enable)
     
     }
 
-    CAN_LeaveInitMode((CAN_T*)obj->can);
+    CAN_LeaveInitMode(can_base);
     
     if(!obj->index)
     {
@@ -253,14 +254,14 @@ int can_write(can_t *obj, CAN_Message msg, int cc)
     CMsg.DLC = msg.len;
     memcpy((void *)&CMsg.Data[0],(const void *)&msg.data[0], (unsigned int)8);
 
-    return CAN_Transmit((CAN_T *)(obj->can), cc, &CMsg);
+    return CAN_Transmit((CAN_T *)NU_MODBASE(obj->can), cc, &CMsg);
 }
 
 int can_read(can_t *obj, CAN_Message *msg, int handle)
 {
     STR_CANMSG_T CMsg;
 
-    if(!CAN_Receive((CAN_T *)(obj->can), handle, &CMsg))
+    if(!CAN_Receive((CAN_T *)NU_MODBASE(obj->can), handle, &CMsg))
     return 0;
         
     msg->format = (CANFormat)CMsg.IdType;
@@ -274,32 +275,34 @@ int can_read(can_t *obj, CAN_Message *msg, int handle)
 
 int can_mode(can_t *obj, CanMode mode)
 {
+    CAN_T *can_base = (CAN_T *) NU_MODBASE(obj->can);
+    
     int success = 0;
     switch (mode)
     {
         case MODE_RESET:
-            CAN_LeaveTestMode((CAN_T*)obj->can);
+            CAN_LeaveTestMode(can_base);
             success = 1;
             break;
         
         case MODE_NORMAL:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_BASIC_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_BASIC_Msk);
             success = 1;
             break;
         
         case MODE_SILENT:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_SILENT_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_SILENT_Msk);
             success = 1;
             break;
         
         case MODE_TEST_LOCAL:
         case MODE_TEST_GLOBAL:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_LBACK_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_LBACK_Msk);
             success = 1;
             break;
         
         case MODE_TEST_SILENT:
-            CAN_EnterTestMode((CAN_T*)(obj->can), CAN_TEST_SILENT_Msk | CAN_TEST_LBACK_Msk);
+            CAN_EnterTestMode(can_base, CAN_TEST_SILENT_Msk | CAN_TEST_LBACK_Msk);
             success = 1;
             break;
         
@@ -315,7 +318,7 @@ int can_mode(can_t *obj, CanMode mode)
 
 int can_filter(can_t *obj, uint32_t id, uint32_t mask, CANFormat format, int32_t handle)
 {
-    return CAN_SetRxMsg((CAN_T *)(obj->can), handle , (uint32_t)format, id);
+    return CAN_SetRxMsg((CAN_T *)NU_MODBASE(obj->can), handle , (uint32_t)format, id);
 }
 
 
@@ -333,19 +336,19 @@ void can_reset(can_t *obj)
 
 unsigned char can_rderror(can_t *obj)
 {
-    CAN_T *can = (CAN_T *)(obj->can); 
+    CAN_T *can = (CAN_T *)NU_MODBASE(obj->can); 
     return ((can->ERR>>8)&0xFF);
 }
 
 unsigned char can_tderror(can_t *obj)
 {
-    CAN_T *can = (CAN_T *)(obj->can);
+    CAN_T *can = (CAN_T *)NU_MODBASE(obj->can);
     return ((can->ERR)&0xFF);
 }
 
 void can_monitor(can_t *obj, int silent)
 {
-    CAN_EnterTestMode((CAN_T *)(obj->can), CAN_TEST_SILENT_Msk);
+    CAN_EnterTestMode((CAN_T *)NU_MODBASE(obj->can), CAN_TEST_SILENT_Msk);
 }
  
 #endif // DEVICE_CAN
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/serial_api.c b/targets/TARGET_NUVOTON/TARGET_NUC472/serial_api.c
index e18938aafe..1426795aa5 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/serial_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/serial_api.c
@@ -285,7 +285,7 @@ void serial_free(serial_t *obj)
 
 void serial_baud(serial_t *obj, int baudrate) {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     obj->serial.baudrate = baudrate;
     UART_Open((UART_T *) NU_MODBASE(obj->serial.uart), baudrate);
@@ -293,7 +293,7 @@ void serial_baud(serial_t *obj, int baudrate) {
 
 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     // TODO: Assert for not supported parity and data bits
     obj->serial.databits = data_bits;
@@ -357,7 +357,7 @@ void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, Pi
 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
 {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     const struct nu_modinit_s *modinit = get_modinit(obj->serial.uart, uart_modinit_tab);
     MBED_ASSERT(modinit != NULL);
@@ -555,7 +555,7 @@ int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx
         PDMA_SetTransferAddr(obj->serial.dma_chn_id_tx, 
             ((uint32_t) tx) + (tx_width / 8) * tx_length,   // NOTE: End of source address
             PDMA_SAR_INC,   // Source address incremental
-            (uint32_t) obj->serial.uart,    // Destination address
+            (uint32_t) NU_MODBASE(obj->serial.uart),    // Destination address
             PDMA_DAR_FIX);  // Destination address fixed
         PDMA_SetBurstType(obj->serial.dma_chn_id_tx, 
             PDMA_REQ_SINGLE,    // Single mode
@@ -612,7 +612,7 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
             (rx_width == 8) ? PDMA_WIDTH_8 : (rx_width == 16) ? PDMA_WIDTH_16 : PDMA_WIDTH_32, 
             rx_length);
         PDMA_SetTransferAddr(obj->serial.dma_chn_id_rx,
-            (uint32_t) obj->serial.uart,    // Source address
+            (uint32_t) NU_MODBASE(obj->serial.uart),    // Source address
             PDMA_SAR_FIX,   // Source address fixed
             ((uint32_t) rx) + (rx_width / 8) * rx_length,   // NOTE: End of destination address
             PDMA_DAR_INC);  // Destination address incremental
@@ -631,7 +631,7 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
 void serial_tx_abort_asynch(serial_t *obj)
 {
     // Flush Tx FIFO. Otherwise, output data may get lost on this change.
-    while (! UART_IS_TX_EMPTY(((UART_T *) obj->serial.uart)));
+    while (! UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart))));
     
     if (obj->serial.dma_usage_tx != DMA_USAGE_NEVER) {
         if (obj->serial.dma_chn_id_tx != DMA_ERROR_OUT_OF_CHANNELS) {