diff --git a/Documentation/platforms/arm/stm32h7/boards/stm32h745i-disco/index.rst b/Documentation/platforms/arm/stm32h7/boards/stm32h745i-disco/index.rst
index 8c98ba46200..ca103ecf94e 100644
--- a/Documentation/platforms/arm/stm32h7/boards/stm32h745i-disco/index.rst
+++ b/Documentation/platforms/arm/stm32h7/boards/stm32h745i-disco/index.rst
@@ -1,3 +1,43 @@
 ===================
 ST STM32H745I-DISCO
 ===================
+
+Dual core support
+-----------------
+
+It is recommended to use CMake to build firmware consisting of multiple images.
+The commands to build ``nsh_xxx`` configurations are as follows::
+
+  cmake -B build_cm7 -DBOARD_CONFIG=stm32h745i-disco:nsh_cm7 -GNinja
+  cmake -B build_cm4 -DBOARD_CONFIG=stm32h745i-disco:nsh_cm4 -GNinja
+
+  cmake --build build_cm7
+  cmake --build build_cm4
+
+Serial console
+--------------
+
+The STM32H745I-DISCO board's ST-LINK interface is connected to USART3, which
+is used as the serial console for the Cortex-M7 core by default. The
+connections for USART3 are as follows:
+
+================= ====
+USART3 Signal     Pin
+================= ====
+USART3_RX         PB11
+USART3_TX         PB10
+================= ====
+
+When using the nsh_xxx configuration, UART7 is assigned to the Cortex-M4 core.
+The UART7 connections can be accessed via the Arduino connector on the board:
+
+================= =================
+UART7 Signal      Pin
+================= =================
+UART7_RX          PA8 (Arduino D10)
+UART7_TX          PB4 (Arduino D5)
+================= =================
+
+This allows the Cortex-M4 core to utilize a separate serial interface, making
+it possible to debug or interact with both cores simultaneously through
+different UART interfaces.
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