diff --git a/Include/stm32l5xx.h b/Include/stm32l5xx.h
index 62b102c..66cfe20 100644
--- a/Include/stm32l5xx.h
+++ b/Include/stm32l5xx.h
@@ -150,6 +150,61 @@
 
 #define MODIFY_REG(REG, CLEARMASK, SETMASK)  WRITE_REG((REG), (((READ_REG(REG)) & (~(CLEARMASK))) | (SETMASK)))
 
+/* Use of CMSIS compiler intrinsics for register exclusive access */
+/* Atomic 32-bit register access macro to set one or several bits */
+#define ATOMIC_SET_BIT(REG, BIT)                             \
+  do {                                                       \
+    uint32_t val;                                            \
+    do {                                                     \
+      val = __LDREXW((__IO uint32_t *)&(REG)) | (BIT);       \
+    } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U); \
+  } while(0)
+
+/* Atomic 32-bit register access macro to clear one or several bits */
+#define ATOMIC_CLEAR_BIT(REG, BIT)                           \
+  do {                                                       \
+    uint32_t val;                                            \
+    do {                                                     \
+      val = __LDREXW((__IO uint32_t *)&(REG)) & ~(BIT);      \
+    } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U); \
+  } while(0)
+
+/* Atomic 32-bit register access macro to clear and set one or several bits */
+#define ATOMIC_MODIFY_REG(REG, CLEARMSK, SETMASK)                          \
+  do {                                                                     \
+    uint32_t val;                                                          \
+    do {                                                                   \
+      val = (__LDREXW((__IO uint32_t *)&(REG)) & ~(CLEARMSK)) | (SETMASK); \
+    } while ((__STREXW(val,(__IO uint32_t *)&(REG))) != 0U);               \
+  } while(0)
+
+/* Atomic 16-bit register access macro to set one or several bits */
+#define ATOMIC_SETH_BIT(REG, BIT)                            \
+  do {                                                       \
+    uint16_t val;                                            \
+    do {                                                     \
+      val = __LDREXH((__IO uint16_t *)&(REG)) | (BIT);       \
+    } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U); \
+  } while(0)
+
+/* Atomic 16-bit register access macro to clear one or several bits */
+#define ATOMIC_CLEARH_BIT(REG, BIT)                          \
+  do {                                                       \
+    uint16_t val;                                            \
+    do {                                                     \
+      val = __LDREXH((__IO uint16_t *)&(REG)) & ~(BIT);      \
+    } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U); \
+  } while(0)
+
+/* Atomic 16-bit register access macro to clear and set one or several bits */
+#define ATOMIC_MODIFYH_REG(REG, CLEARMSK, SETMASK)                         \
+  do {                                                                     \
+    uint16_t val;                                                          \
+    do {                                                                   \
+      val = (__LDREXH((__IO uint16_t *)&(REG)) & ~(CLEARMSK)) | (SETMASK); \
+    } while ((__STREXH(val,(__IO uint16_t *)&(REG))) != 0U);               \
+  } while(0)
+
 #define POSITION_VAL(VAL)     (__CLZ(__RBIT(VAL)))
 
 
diff --git a/README.md b/README.md
index 6885106..21ba891 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@
 Tag v1.0.2 | Tag v5.4.0_cm33 | Tag v1.2.0 (and following, if any, till next CMSIS tag)
 Tag v1.0.3 | Tag v5.6.0_cm33 | Tag v1.3.0 (and following, if any, till next CMSIS tag)
 Tag v1.0.4 | Tag v5.6.0_cm33 | Tag v1.4.0 (and following, if any, till next CMSIS tag)
+
 The full **STM32CubeL5** MCU package is available [here](https://github.com/STMicroelectronics/STM32CubeL5).
 
 ## Troubleshooting