diff --git a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/IAR/Config/FreeRTOSConfig.h b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/IAR/Config/FreeRTOSConfig.h
index a9414990c9..b90c057dcb 100644
--- a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/IAR/Config/FreeRTOSConfig.h
+++ b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/IAR/Config/FreeRTOSConfig.h
@@ -134,27 +134,17 @@
 #ifdef __NVIC_PRIO_BITS
 	#define configPRIO_BITS								__NVIC_PRIO_BITS
 #else
-	#define configPRIO_BITS								3	 /* 8 priority levels. */
+	#define configPRIO_BITS								2	 /* 4 priority levels. */
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority"
  * function. */
-#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x07
-
-/* The highest interrupt priority that can be used by any interrupt service
- * routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT
- * CALL INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A
- * HIGHER PRIORITY THAN THIS! (higher priorities are lower numeric values). */
-#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x03
 
 /* Interrupt priorities used by the kernel port layer itself.  These are generic
  * to all Cortex-M ports, and do not rely on any particular library functions. */
 #define configKERNEL_INTERRUPT_PRIORITY					( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
 
-/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
- * See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
-#define configMAX_SYSCALL_INTERRUPT_PRIORITY			( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
-
 /* The #ifdef guards against the file being included from IAR assembly files. */
 #ifndef __IASMARM__
 
diff --git a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/Keil/Config/FreeRTOSConfig.h b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/Keil/Config/FreeRTOSConfig.h
index 95ad221f7d..2245ff5dca 100644
--- a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/Keil/Config/FreeRTOSConfig.h
+++ b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects/Keil/Config/FreeRTOSConfig.h
@@ -129,27 +129,17 @@ extern uint32_t SystemCoreClock;
 #ifdef __NVIC_PRIO_BITS
 	#define configPRIO_BITS								__NVIC_PRIO_BITS
 #else
-	#define configPRIO_BITS								3	 /* 8 priority levels. */
+	#define configPRIO_BITS								2	 /* 4 priority levels. */
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority"
  * function. */
-#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x07
-
-/* The highest interrupt priority that can be used by any interrupt service
- * routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT
- * CALL INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A
- * HIGHER PRIORITY THAN THIS! (higher priorities are lower numeric values). */
-#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x03
 
 /* Interrupt priorities used by the kernel port layer itself.  These are generic
  * to all Cortex-M ports, and do not rely on any particular library functions. */
 #define configKERNEL_INTERRUPT_PRIORITY					( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
 
-/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
- * See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
-#define configMAX_SYSCALL_INTERRUPT_PRIORITY			( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
-
 /* The #ifdef guards against the file being included from IAR assembly files. */
 #ifndef __IASMARM__
 
diff --git a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/IAR/Config/FreeRTOSConfig.h b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/IAR/Config/FreeRTOSConfig.h
index 3234ed6845..5ba1772145 100644
--- a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/IAR/Config/FreeRTOSConfig.h
+++ b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/IAR/Config/FreeRTOSConfig.h
@@ -135,27 +135,17 @@
 #ifdef __NVIC_PRIO_BITS
 	#define configPRIO_BITS								__NVIC_PRIO_BITS
 #else
-	#define configPRIO_BITS								3	 /* 8 priority levels. */
+	#define configPRIO_BITS								2	 /* 4 priority levels. */
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority"
  * function. */
-#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x07
-
-/* The highest interrupt priority that can be used by any interrupt service
- * routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT
- * CALL INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A
- * HIGHER PRIORITY THAN THIS! (higher priorities are lower numeric values). */
-#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x03
 
 /* Interrupt priorities used by the kernel port layer itself.  These are generic
  * to all Cortex-M ports, and do not rely on any particular library functions. */
 #define configKERNEL_INTERRUPT_PRIORITY					( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
 
-/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
- * See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
-#define configMAX_SYSCALL_INTERRUPT_PRIORITY			( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
-
 /* The #ifdef guards against the file being included from IAR assembly files. */
 #ifndef __IASMARM__
 
diff --git a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/Keil/Config/FreeRTOSConfig.h b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/Keil/Config/FreeRTOSConfig.h
index c8c02affee..ee4d24ca6f 100644
--- a/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/Keil/Config/FreeRTOSConfig.h
+++ b/FreeRTOS/Demo/CORTEX_MPU_M23_Nuvoton_NuMaker_PFM_M2351_IAR_GCC/Projects_NTZ/Keil/Config/FreeRTOSConfig.h
@@ -130,27 +130,17 @@ extern uint32_t SystemCoreClock;
 #ifdef __NVIC_PRIO_BITS
 	#define configPRIO_BITS								__NVIC_PRIO_BITS
 #else
-	#define configPRIO_BITS								3	 /* 8 priority levels. */
+	#define configPRIO_BITS								2	 /* 4 priority levels. */
 #endif
 
 /* The lowest interrupt priority that can be used in a call to a "set priority"
  * function. */
-#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x07
-
-/* The highest interrupt priority that can be used by any interrupt service
- * routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT
- * CALL INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A
- * HIGHER PRIORITY THAN THIS! (higher priorities are lower numeric values). */
-#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5
+#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0x03
 
 /* Interrupt priorities used by the kernel port layer itself.  These are generic
  * to all Cortex-M ports, and do not rely on any particular library functions. */
 #define configKERNEL_INTERRUPT_PRIORITY					( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
 
-/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
- * See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
-#define configMAX_SYSCALL_INTERRUPT_PRIORITY			( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << ( 8 - configPRIO_BITS ) )
-
 /* The #ifdef guards against the file being included from IAR assembly files. */
 #ifndef __IASMARM__