diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g431xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g431xx.h
index 100406bf34..605669a2c7 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g431xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g431xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g441xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g441xx.h
index a1e3d44efa..3ca377a23c 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g441xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g441xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g471xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g471xx.h
index 9a3fe226de..00b93f5839 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g471xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g471xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g473xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g473xx.h
index 3d33331519..debfe8d295 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g473xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g473xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g474xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g474xx.h
index 46563790fa..50696cde6c 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g474xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g474xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g483xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g483xx.h
index c1bf5ab7fa..2fc1efaf71 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g483xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g483xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g484xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g484xx.h
index 402b8e3c43..088ae0aea3 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g484xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g484xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g491xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g491xx.h
index f5927aa4f2..e7c3cb532f 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g491xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g491xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4a1xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4a1xx.h
index feae9f28e1..aa2261724c 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4a1xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4a1xx.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4xx.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4xx.h
index 65d3559e0a..eb3c7430d2 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4xx.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32g4xx.h
@@ -8,8 +8,8 @@
   *          is using in the C source code, usually in main.c. This file contains:
   *           - Configuration section that allows to select:
   *              - The STM32G4xx device used in the target application
-  *              - To use or not the peripheral’s drivers in application code(i.e.
-  *                code will be based on direct access to peripheral’s registers
+  *              - To use or not the peripheral's drivers in application code(i.e.
+  *                code will be based on direct access to peripheral's registers
   *                rather than drivers API), this option is controlled by
   *                "#define USE_HAL_DRIVER"
   *
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32gbk1cb.h b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32gbk1cb.h
index 76781724fa..b09e705b7f 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32gbk1cb.h
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/CMSIS/stm32gbk1cb.h
@@ -7,7 +7,7 @@
   *          This file contains:
   *           - Data structures and the address mapping for all peripherals
   *           - Peripheral's registers declarations and bits definition
-  *           - Macros to access peripheral’s registers hardware
+  *           - Macros to access peripheral's registers hardware
   *
   ******************************************************************************
   * @attention
diff --git a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/STM32G4xx_HAL_Driver/stm32g4xx_hal_wwdg.c b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/STM32G4xx_HAL_Driver/stm32g4xx_hal_wwdg.c
index 43ae8593e1..96d74e2446 100644
--- a/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/STM32G4xx_HAL_Driver/stm32g4xx_hal_wwdg.c
+++ b/targets/TARGET_STM/TARGET_STM32G4/STM32Cube_FW/STM32G4xx_HAL_Driver/stm32g4xx_hal_wwdg.c
@@ -40,7 +40,7 @@
         (++) max time (mS) = 1000 * (Counter - 0x40) / WWDG clock
     (+) Typical values:
         (++) Counter min (T[5;0] = 0x00) at 170MHz (PCLK1) with zero prescaler:
-             max timeout before reset: approximately 24.09µs
+             max timeout before reset: approximately 24.09us
         (++) Counter max (T[5;0] = 0x3F) at 170MHz (PCLK1) with prescaler
              dividing by 128:
              max timeout before reset: approximately 197.38ms