diff --git a/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c b/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c
index abb16e6226..ab1e2e84de 100644
--- a/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c
+++ b/targets/TARGET_NUVOTON/TARGET_M251/device/StdDriver/src/m251_pwm.c
@@ -138,7 +138,7 @@ uint32_t PWM_ConfigCaptureChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u
  *                - PWM1 : PWM Group 1
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
@@ -155,7 +155,7 @@ uint32_t PWM_ConfigOutputChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u3
  *                - PWM1 : PWM Group 1
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency = u32Frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure PWM frequency may affect
@@ -221,10 +221,10 @@ uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u
 
     if (u32DutyCycle)
     {
-        if (u32DutyCycle >= 100UL)
+        if (u32DutyCycle >= 10000UL)
             PWM_SET_CMR(pwm, u32ChannelNum, u16CNR);
         else
-            PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1UL) / 100UL);
+            PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1UL) / 10000UL);
 
         (pwm)->WGCTL0 &= ~((PWM_WGCTL0_PRDPCTL0_Msk | PWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum << 1UL));
         (pwm)->WGCTL0 |= (PWM_OUTPUT_LOW << ((u32ChannelNum << 1UL) + PWM_WGCTL0_PRDPCTL0_Pos));
diff --git a/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c
index 4ce8c93d86..8bf50a261b 100644
--- a/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M251/pwmout_api.c
@@ -195,10 +195,10 @@ static void pwmout_config(pwmout_t *obj, int start)
 
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
     pwm_base->POLCTL |= 1 << (PWM_POLCTL_PINV0_Pos + chn);
 
     if (start) {
diff --git a/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c b/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c
index 05a0fba84c..03d46758f7 100644
--- a/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c
+++ b/targets/TARGET_NUVOTON/TARGET_M261/device/StdDriver/m261_epwm.c
@@ -117,7 +117,7 @@ uint32_t EPWM_ConfigCaptureChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
  *                - EPWM1 : EPWM Group 1
  * @param[in] u32ChannelNum EPWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure EPWM frequency may affect
  *       existing frequency of other channel.
@@ -136,7 +136,7 @@ uint32_t EPWM_ConfigOutputChannel(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_t
  *                - EPWM1 : EPWM Group 1
  * @param[in] u32ChannelNum EPWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure EPWM frequency may affect
@@ -183,7 +183,7 @@ uint32_t EPWM_ConfigOutputChannel2(EPWM_T *epwm, uint32_t u32ChannelNum, uint32_
 
     u32CNR = u32CNR - 1U;
     EPWM_SET_CNR(epwm, u32ChannelNum, u32CNR);
-    EPWM_SET_CMR(epwm, u32ChannelNum, u32DutyCycle * (u32CNR + 1UL) / 100UL);
+    EPWM_SET_CMR(epwm, u32ChannelNum, u32DutyCycle * (u32CNR + 1UL) / 10000UL);
 
     (epwm)->WGCTL0 = ((epwm)->WGCTL0 & ~((EPWM_WGCTL0_PRDPCTL0_Msk | EPWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum << 1))) | \
                      (EPWM_OUTPUT_HIGH << (u32ChannelNum << 1UL << EPWM_WGCTL0_ZPCTL0_Pos));
diff --git a/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c
index 0030b39ff0..ef07b168e5 100644
--- a/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M261/pwmout_api.c
@@ -195,10 +195,10 @@ static void pwmout_config(pwmout_t *obj, int start)
 
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
     pwm_base->POLCTL |= 1 << (EPWM_POLCTL_PINV0_Pos + chn);
 
     if (start) {
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c b/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c
index 56ca231859..a85e8527fb 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/device/StdDriver/m451_pwm.c
@@ -97,7 +97,7 @@ uint32_t PWM_ConfigCaptureChannel(PWM_T *pwm, uint32_t u32ChannelNum, uint32_t u
  *                - PWM1 : PWM Group 1
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
@@ -115,7 +115,7 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency = u32Frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
@@ -178,7 +178,7 @@ uint32_t PWM_ConfigOutputChannel2(PWM_T *pwm,
     PWM_SET_CNR(pwm, u32ChannelNum, --u16CNR);
     if(u32DutyCycle)
     {
-        PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1) / 100 - 1);
+        PWM_SET_CMR(pwm, u32ChannelNum, u32DutyCycle * (u16CNR + 1) / 10000 - 1);
         (pwm)->WGCTL0 &= ~((PWM_WGCTL0_PRDPCTL0_Msk | PWM_WGCTL0_ZPCTL0_Msk) << (u32ChannelNum * 2));
         (pwm)->WGCTL0 |= (PWM_OUTPUT_LOW << (u32ChannelNum * 2 + PWM_WGCTL0_PRDPCTL0_Pos));
         (pwm)->WGCTL1 &= ~((PWM_WGCTL1_CMPDCTL0_Msk | PWM_WGCTL1_CMPUCTL0_Msk) << (u32ChannelNum * 2));
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c
index e3089d9874..74323159d4 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c
@@ -195,7 +195,7 @@ static void pwmout_config(pwmout_t *obj)
     uint32_t chn = NU_MODSUBINDEX(obj->pwm);
     // NOTE: Support period < 1s
     //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
 }
 
 const PinMap *pwmout_pinmap()
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c b/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c
index 7fd269b1cb..156117afd4 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/device/StdDriver/nano100_pwm.c
@@ -28,7 +28,7 @@
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
@@ -46,7 +46,7 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
@@ -136,7 +136,7 @@ uint32_t PWM_ConfigOutputChannel2 (PWM_T *pwm,
         *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CM_Msk;
     else {
         *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CM_Msk;
-        *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= ((u32DutyCycle * (u16CNR + 1) / 100 - 1) << PWM_DUTY_CM_Pos);
+        *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= ((u32DutyCycle * (u16CNR + 1) / 10000 - 1) << PWM_DUTY_CM_Pos);
     }
     *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) &= ~PWM_DUTY_CN_Msk;
     *(__IO uint32_t *) (&pwm->DUTY0 + 3 * u32ChannelNum) |= u16CNR;
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c
index c6ad54e1f9..8ba1f40dd4 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/pwmout_api.c
@@ -198,10 +198,10 @@ static void pwmout_config(pwmout_t *obj)
     uint32_t chn = NU_MODSUBINDEX(obj->pwm);
     // NOTE: Support period < 1s
     // NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
-    //       1. Inverse duty cycle (100 - duty)
+    //       1. Inverse duty cycle (10000 - duty)
     //       2. Inverse PWM output polarity
     //       This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - (obj->pulsewidth_us * 100 / obj->period_us), obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 10000 - (obj->pulsewidth_us * 10000 / obj->period_us), obj->period_us);
 }
 
 const PinMap *pwmout_pinmap()
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_pwm.c b/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_pwm.c
index 33757730a4..4f21b57815 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_pwm.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/device/StdDriver/nuc472_pwm.c
@@ -28,7 +28,7 @@
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
  *       existing frequency of other channel.
@@ -46,7 +46,7 @@ uint32_t PWM_ConfigOutputChannel (PWM_T *pwm,
  * @param[in] pwm The base address of PWM module
  * @param[in] u32ChannelNum PWM channel number. Valid values are between 0~5
  * @param[in] u32Frequency Target generator frequency = u32Frequency / u32Frequency2
- * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 100. 10 means 10%, 20 means 20%...
+ * @param[in] u32DutyCycle Target generator duty cycle percentage. Valid range are between 0 ~ 10000. 1000 means 10%, 2000 means 20%...
  * @param[in] u32Frequency2 Target generator frequency = u32Frequency / u32Frequency2
  * @return Nearest frequency clock in nano second
  * @note Since every two channels, (0 & 1), (2 & 3), (4 & 5), shares a prescaler. Call this API to configure PWM frequency may affect
@@ -185,7 +185,7 @@ uint32_t PWM_ConfigOutputChannel2 (PWM_T *pwm,
     if(u32DutyCycle == 0)
         pwm->CMPDAT[u32ChannelNum] = 0;
     else
-        pwm->CMPDAT[u32ChannelNum] = u32DutyCycle * (u16CNR + 1) / 100 - 1;
+        pwm->CMPDAT[u32ChannelNum] = u32DutyCycle * (u16CNR + 1) / 10000 - 1;
     pwm->PERIOD[u32ChannelNum] = u16CNR;
 
     return(i);
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c b/targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c
index c1891bfc1f..aa81799abe 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/pwmout_api.c
@@ -219,7 +219,7 @@ static void pwmout_config(pwmout_t *obj)
     uint32_t chn = NU_MODSUBINDEX(obj->pwm);
     // NOTE: Support period < 1s
     //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
-    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
+    PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 10000 / obj->period_us, obj->period_us);
 }
 
 const PinMap *pwmout_pinmap()