diff --git a/targets/TARGET_NUVOTON/TARGET_M2351/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M2351/lp_ticker.c
index 8e0daf379f..d7b4eb6e47 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2351/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M2351/lp_ticker.c
@@ -101,8 +101,6 @@ void lp_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         lp_ticker_disable_interrupt();
-        lp_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -203,6 +201,10 @@ timestamp_t lp_ticker_read()
 
 void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    lp_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_M2351/us_ticker.c b/targets/TARGET_NUVOTON/TARGET_M2351/us_ticker.c
index a8034561fc..9a336110c7 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2351/us_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M2351/us_ticker.c
@@ -75,8 +75,6 @@ void us_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         us_ticker_disable_interrupt();
-        us_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -159,6 +157,10 @@ uint32_t us_ticker_read()
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    us_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
index 5a09e84a3d..98e8631e4e 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
@@ -76,8 +76,6 @@ void lp_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         lp_ticker_disable_interrupt();
-        lp_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -166,6 +164,10 @@ timestamp_t lp_ticker_read()
 
 void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    lp_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/us_ticker.c b/targets/TARGET_NUVOTON/TARGET_M451/us_ticker.c
index 0fadea09de..66e9a97c42 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/us_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/us_ticker.c
@@ -52,8 +52,6 @@ void us_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         us_ticker_disable_interrupt();
-        us_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -124,6 +122,10 @@ uint32_t us_ticker_read()
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    us_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
index 1811c72dfc..04b88e8a61 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
@@ -76,8 +76,6 @@ void lp_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         lp_ticker_disable_interrupt();
-        lp_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -166,6 +164,10 @@ timestamp_t lp_ticker_read()
 
 void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    lp_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/us_ticker.c b/targets/TARGET_NUVOTON/TARGET_M480/us_ticker.c
index 1441cf26b3..715857241d 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/us_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/us_ticker.c
@@ -52,8 +52,6 @@ void us_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         us_ticker_disable_interrupt();
-        us_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -124,6 +122,10 @@ uint32_t us_ticker_read()
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    us_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
index c2faafc856..fc249fc38e 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
@@ -78,8 +78,6 @@ void lp_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         lp_ticker_disable_interrupt();
-        lp_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -170,6 +168,10 @@ timestamp_t lp_ticker_read()
 
 void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    lp_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/us_ticker.c b/targets/TARGET_NUVOTON/TARGET_NANO100/us_ticker.c
index 0c5160d839..f1bf49467e 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/us_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/us_ticker.c
@@ -54,8 +54,6 @@ void us_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         us_ticker_disable_interrupt();
-        us_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -126,6 +124,10 @@ uint32_t us_ticker_read()
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    us_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
index 1f55c08ca2..c7972dcabd 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
@@ -76,8 +76,6 @@ void lp_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         lp_ticker_disable_interrupt();
-        lp_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -165,6 +163,10 @@ timestamp_t lp_ticker_read()
 
 void lp_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    lp_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/us_ticker.c b/targets/TARGET_NUVOTON/TARGET_NUC472/us_ticker.c
index 03e58bac60..a135a7585a 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/us_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/us_ticker.c
@@ -52,8 +52,6 @@ void us_ticker_init(void)
         /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
          * ticker interrupt. */
         us_ticker_disable_interrupt();
-        us_ticker_clear_interrupt();
-        NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
         return;
     }
     ticker_inited = 1;
@@ -123,6 +121,10 @@ uint32_t us_ticker_read()
 
 void us_ticker_set_interrupt(timestamp_t timestamp)
 {
+    /* Clear any previously pending interrupts */
+    us_ticker_clear_interrupt();
+    NVIC_ClearPendingIRQ(TIMER_MODINIT.irq_n);
+
     /* In continuous mode, counter will be reset to zero with the following sequence: 
      * 1. Stop counting
      * 2. Configure new CMP value