diff --git a/boards/arm/stm32h747i_disco/Kconfig.defconfig b/boards/arm/stm32h747i_disco/Kconfig.defconfig
index a59bc7d894b..fad160560b4 100644
--- a/boards/arm/stm32h747i_disco/Kconfig.defconfig
+++ b/boards/arm/stm32h747i_disco/Kconfig.defconfig
@@ -50,6 +50,7 @@ endif # STM32H7_DUAL_CORE
 
 if UART_CONSOLE
 
+# Change this to assign UART_1 (console) to M4 core
 config UART_1
 	default y if BOARD_STM32H747I_DISCO_M7
 
@@ -57,6 +58,7 @@ endif # UART_CONSOLE
 
 if SERIAL
 
+# Change this to assign UART_8 to M4 core
 config UART_8
 	default y if BOARD_STM32H747I_DISCO_M7
 
diff --git a/boards/arm/stm32h747i_disco/stm32h747i_disco_m4.dts b/boards/arm/stm32h747i_disco/stm32h747i_disco_m4.dts
index 3b0e865597b..6a10686ca62 100644
--- a/boards/arm/stm32h747i_disco/stm32h747i_disco_m4.dts
+++ b/boards/arm/stm32h747i_disco/stm32h747i_disco_m4.dts
@@ -41,3 +41,13 @@
 		sw0 = &joy_center;
 	};
 };
+
+&usart1 {
+	current-speed = <115200>;
+	/* status = "okay"; */
+};
+
+&uart8 {
+	current-speed = <115200>;
+	/* status = "okay"; */
+};
diff --git a/boards/arm/stm32h747i_disco/stm32h747i_disco_m4_defconfig b/boards/arm/stm32h747i_disco/stm32h747i_disco_m4_defconfig
index 9e362108d8c..57612947f69 100644
--- a/boards/arm/stm32h747i_disco/stm32h747i_disco_m4_defconfig
+++ b/boards/arm/stm32h747i_disco/stm32h747i_disco_m4_defconfig
@@ -14,3 +14,11 @@ CONFIG_GPIO=y
 
 # clock configuration
 CONFIG_CLOCK_CONTROL=y
+
+# By default SERIAL peripherals are assigned to m7
+
+# enable uart driver
+#CONFIG_SERIAL=y
+# console
+#CONFIG_CONSOLE=y
+#CONFIG_UART_CONSOLE=y
diff --git a/boards/arm/stm32h747i_disco/stm32h747i_disco_m7_defconfig b/boards/arm/stm32h747i_disco/stm32h747i_disco_m7_defconfig
index cd8ad076121..cbd8a7758b6 100644
--- a/boards/arm/stm32h747i_disco/stm32h747i_disco_m7_defconfig
+++ b/boards/arm/stm32h747i_disco/stm32h747i_disco_m7_defconfig
@@ -30,9 +30,10 @@ CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
 CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=4
 CONFIG_CLOCK_STM32_PLL_R_DIVISOR=2
 
+# Disable following to assign serial ports to m4 core
+
 # enable uart driver
 CONFIG_SERIAL=y
-
 # console
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y