diff --git a/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
index 282005904f..a2a8abee63 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/lp_ticker.c
@@ -53,6 +53,10 @@ static int ticker_inited = 0;
 void lp_ticker_init(void)
 {
     if (ticker_inited) {
+        /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
+         * ticker interrupt. */
+        lp_ticker_disable_interrupt();
+        lp_ticker_clear_interrupt();
         return;
     }
     ticker_inited = 1;
@@ -88,7 +92,7 @@ void lp_ticker_init(void)
 
     NVIC_EnableIRQ(TIMER_MODINIT.irq_n);
 
-    TIMER_EnableInt(timer_base);
+    TIMER_DisableInt(timer_base);
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 
     TIMER_EnableWakeup(timer_base);
@@ -101,6 +105,33 @@ void lp_ticker_init(void)
     while(! (timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
 }
 
+void lp_ticker_free(void)
+{
+    TIMER_T *timer_base = (TIMER_T *) NU_MODBASE(TIMER_MODINIT.modname);
+
+    /* Stop counting */
+    TIMER_Stop(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Wait for timer to stop counting and unset active flag */
+    while((timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
+
+    /* Disable wakeup */
+    TIMER_DisableWakeup(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Disable interrupt */
+    TIMER_DisableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    NVIC_DisableIRQ(TIMER_MODINIT.irq_n);
+
+    /* Disable IP clock */
+    CLK_DisableModuleClock(TIMER_MODINIT.clkidx);
+
+    ticker_inited = 0;
+}
+
 timestamp_t lp_ticker_read()
 {
     if (! ticker_inited) {
@@ -131,6 +162,9 @@ void lp_ticker_set_interrupt(timestamp_t timestamp)
 
     timer_base->CMP = cmp_timer;
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    TIMER_EnableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 }
 
 void lp_ticker_disable_interrupt(void)
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
index a09360608e..83c43fe13c 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
@@ -53,6 +53,10 @@ static int ticker_inited = 0;
 void lp_ticker_init(void)
 {
     if (ticker_inited) {
+        /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
+         * ticker interrupt. */
+        lp_ticker_disable_interrupt();
+        lp_ticker_clear_interrupt();
         return;
     }
     ticker_inited = 1;
@@ -88,7 +92,7 @@ void lp_ticker_init(void)
 
     NVIC_EnableIRQ(TIMER_MODINIT.irq_n);
 
-    TIMER_EnableInt(timer_base);
+    TIMER_DisableInt(timer_base);
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 
     TIMER_EnableWakeup(timer_base);
@@ -101,6 +105,33 @@ void lp_ticker_init(void)
     while(! (timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
 }
 
+void lp_ticker_free(void)
+{
+    TIMER_T *timer_base = (TIMER_T *) NU_MODBASE(TIMER_MODINIT.modname);
+
+    /* Stop counting */
+    TIMER_Stop(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Wait for timer to stop counting and unset active flag */
+    while((timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
+
+    /* Disable wakeup */
+    TIMER_DisableWakeup(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Disable interrupt */
+    TIMER_DisableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    NVIC_DisableIRQ(TIMER_MODINIT.irq_n);
+
+    /* Disable IP clock */
+    CLK_DisableModuleClock(TIMER_MODINIT.clkidx);
+
+    ticker_inited = 0;
+}
+
 timestamp_t lp_ticker_read()
 {
     if (! ticker_inited) {
@@ -131,6 +162,9 @@ void lp_ticker_set_interrupt(timestamp_t timestamp)
 
     timer_base->CMP = cmp_timer;
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    TIMER_EnableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 }
 
 void lp_ticker_disable_interrupt(void)
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
index 6355531d33..451834ed55 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c
@@ -55,6 +55,10 @@ static int ticker_inited = 0;
 void lp_ticker_init(void)
 {
     if (ticker_inited) {
+        /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
+         * ticker interrupt. */
+        lp_ticker_disable_interrupt();
+        lp_ticker_clear_interrupt();
         return;
     }
     ticker_inited = 1;
@@ -92,7 +96,7 @@ void lp_ticker_init(void)
 
     NVIC_EnableIRQ(TIMER_MODINIT.irq_n);
 
-    TIMER_EnableInt(timer_base);
+    TIMER_DisableInt(timer_base);
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 
     TIMER_EnableWakeup(timer_base);
@@ -105,6 +109,33 @@ void lp_ticker_init(void)
     while(! (timer_base->CTL & TIMER_CTL_TMR_ACT_Msk));
 }
 
+void lp_ticker_free(void)
+{
+    TIMER_T *timer_base = (TIMER_T *) NU_MODBASE(TIMER_MODINIT.modname);
+
+    /* Stop counting */
+    TIMER_Stop(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Wait for timer to stop counting and unset active flag */
+    while((timer_base->CTL & TIMER_CTL_TMR_ACT_Msk));
+
+    /* Disable wakeup */
+    TIMER_DisableWakeup(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Disable interrupt */
+    TIMER_DisableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    NVIC_DisableIRQ(TIMER_MODINIT.irq_n);
+
+    /* Disable IP clock */
+    CLK_DisableModuleClock(TIMER_MODINIT.clkidx);
+
+    ticker_inited = 0;
+}
+
 timestamp_t lp_ticker_read()
 {
     if (! ticker_inited) {
@@ -135,6 +166,9 @@ void lp_ticker_set_interrupt(timestamp_t timestamp)
 
     timer_base->CMPR = cmp_timer;
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    TIMER_EnableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 }
 
 void lp_ticker_disable_interrupt(void)
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c b/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
index 08ce7f8989..015e7caf2b 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/lp_ticker.c
@@ -53,6 +53,10 @@ static int ticker_inited = 0;
 void lp_ticker_init(void)
 {
     if (ticker_inited) {
+        /* By HAL spec, ticker_init allows the ticker to keep counting and disables the
+         * ticker interrupt. */
+        lp_ticker_disable_interrupt();
+        lp_ticker_clear_interrupt();
         return;
     }
     ticker_inited = 1;
@@ -87,7 +91,7 @@ void lp_ticker_init(void)
 
     NVIC_EnableIRQ(TIMER_MODINIT.irq_n);
 
-    TIMER_EnableInt(timer_base);
+    TIMER_DisableInt(timer_base);
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 
     TIMER_EnableWakeup(timer_base);
@@ -100,6 +104,33 @@ void lp_ticker_init(void)
     while(! (timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
 }
 
+void lp_ticker_free(void)
+{
+    TIMER_T *timer_base = (TIMER_T *) NU_MODBASE(TIMER_MODINIT.modname);
+
+    /* Stop counting */
+    TIMER_Stop(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Wait for timer to stop counting and unset active flag */
+    while((timer_base->CTL & TIMER_CTL_ACTSTS_Msk));
+
+    /* Disable wakeup */
+    TIMER_DisableWakeup(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    /* Disable interrupt */
+    TIMER_DisableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    NVIC_DisableIRQ(TIMER_MODINIT.irq_n);
+
+    /* Disable IP clock */
+    CLK_DisableModuleClock(TIMER_MODINIT.clkidx);
+
+    ticker_inited = 0;
+}
+
 timestamp_t lp_ticker_read()
 {
     if (! ticker_inited) {
@@ -130,6 +161,9 @@ void lp_ticker_set_interrupt(timestamp_t timestamp)
 
     timer_base->CMP = cmp_timer;
     wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
+
+    TIMER_EnableInt(timer_base);
+    wait_us((NU_US_PER_SEC / NU_TMRCLK_PER_SEC) * 3);
 }
 
 void lp_ticker_disable_interrupt(void)
diff --git a/targets/targets.json b/targets/targets.json
index 3c730b8968..979d1b3423 100755
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -3844,7 +3844,7 @@
         },
         "inherits": ["Target"],
         "macros_add": ["MBEDTLS_CONFIG_HW_SUPPORT"],
-        "device_has": ["USTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG", "CAN", "FLASH", "EMAC"],
+        "device_has": ["USTICKER", "LPTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG", "CAN", "FLASH", "EMAC"],
         "release_versions": ["5"],
         "device_name": "NUC472HI8AE",
         "bootloader_supported": true,
@@ -3915,7 +3915,7 @@
         },
         "inherits": ["Target"],
         "progen": {"target": "numaker-pfm-m453"},
-        "device_has": ["USTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "CAN", "FLASH"],
+        "device_has": ["USTICKER", "LPTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "CAN", "FLASH"],
         "release_versions": ["2", "5"],
         "device_name": "M453VG6AE",
         "bootloader_supported": true
@@ -3946,7 +3946,7 @@
         },
         "inherits": ["Target"],
         "macros": ["CMSIS_VECTAB_VIRTUAL", "CMSIS_VECTAB_VIRTUAL_HEADER_FILE=\"cmsis_nvic.h\"","MBED_FAULT_HANDLER_DISABLED"],
-        "device_has": ["USTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH"],
+        "device_has": ["USTICKER", "LPTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH"],
         "release_versions": ["5"],
         "device_name": "NANO130KE3BN"
     },
@@ -4113,7 +4113,7 @@
         },
         "inherits": ["Target"],
         "macros_add": ["MBEDTLS_CONFIG_HW_SUPPORT"],
-        "device_has": ["USTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG", "FLASH", "CAN", "EMAC"],
+        "device_has": ["USTICKER", "LPTICKER", "RTC", "ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "STDIO_MESSAGES", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "TRNG", "FLASH", "CAN", "EMAC"],
         "release_versions": ["5"],
         "device_name": "M487JIDAE",
         "bootloader_supported": true,