diff --git a/boot/zephyr/boards/b_u585i_iot02a.conf b/boot/zephyr/boards/b_u585i_iot02a.conf
new file mode 100644
index 000000000..bb252da95
--- /dev/null
+++ b/boot/zephyr/boards/b_u585i_iot02a.conf
@@ -0,0 +1,4 @@
+CONFIG_BOOT_DIRECT_XIP=y
+CONFIG_STM32_MEMMAP=y
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=1024
diff --git a/boot/zephyr/boards/b_u585i_iot02a.overlay b/boot/zephyr/boards/b_u585i_iot02a.overlay
new file mode 100644
index 000000000..4bc051c46
--- /dev/null
+++ b/boot/zephyr/boards/b_u585i_iot02a.overlay
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2025 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * Define the device, controller and partition to be the external memory
+ * for running the application in external NOR from MCUboot
+ */
+
+/delete-node/ &slot0_partition;
+/delete-node/ &slot1_partition;
+/delete-node/ &scratch_partition;
+/delete-node/ &storage_partition;
+
+&mx25lm51245 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		slot0_partition: partition@0 {
+			label = "image-0";
+			reg = <0x00000000 DT_SIZE_K(416)>;
+		};
+		slot1_partition: partition@68000 {
+			label = "image-1";
+			reg = <0x00068000 DT_SIZE_K(416)>;
+		};
+		scratch_partition: partition@d0000 {
+			label = "image-scratch";
+			reg = <0x000d00000 DT_SIZE_K(64)>;
+		};
+		storage_partition: partition@e0000 {
+			label = "storage";
+			reg = <0x000e0000 DT_SIZE_K(64)>;
+		};	};
+};
+
diff --git a/boot/zephyr/boards/nucleo_h7s3l8.conf b/boot/zephyr/boards/nucleo_h7s3l8.conf
new file mode 100644
index 000000000..93013ed9a
--- /dev/null
+++ b/boot/zephyr/boards/nucleo_h7s3l8.conf
@@ -0,0 +1,4 @@
+CONFIG_BOOT_DIRECT_XIP=y
+CONFIG_STM32_MEMMAP=y
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=4096
diff --git a/boot/zephyr/boards/stm32h573i_dk.conf b/boot/zephyr/boards/stm32h573i_dk.conf
new file mode 100644
index 000000000..93013ed9a
--- /dev/null
+++ b/boot/zephyr/boards/stm32h573i_dk.conf
@@ -0,0 +1,4 @@
+CONFIG_BOOT_DIRECT_XIP=y
+CONFIG_STM32_MEMMAP=y
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=4096
diff --git a/boot/zephyr/boards/stm32h750b_dk.conf b/boot/zephyr/boards/stm32h750b_dk.conf
new file mode 100644
index 000000000..068bb7700
--- /dev/null
+++ b/boot/zephyr/boards/stm32h750b_dk.conf
@@ -0,0 +1,4 @@
+CONFIG_BOOT_DIRECT_XIP=y
+CONFIG_STM32_MEMMAP=y
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=256
diff --git a/boot/zephyr/boards/stm32h7s78_dk.conf b/boot/zephyr/boards/stm32h7s78_dk.conf
new file mode 100644
index 000000000..93013ed9a
--- /dev/null
+++ b/boot/zephyr/boards/stm32h7s78_dk.conf
@@ -0,0 +1,4 @@
+CONFIG_BOOT_DIRECT_XIP=y
+CONFIG_STM32_MEMMAP=y
+CONFIG_BOOT_MAX_IMG_SECTORS_AUTO=n
+CONFIG_BOOT_MAX_IMG_SECTORS=4096
diff --git a/boot/zephyr/flash_map_extended.c b/boot/zephyr/flash_map_extended.c
index 3b95b1fd7..f6a9087d9 100644
--- a/boot/zephyr/flash_map_extended.c
+++ b/boot/zephyr/flash_map_extended.c
@@ -20,7 +20,23 @@
 
 BOOT_LOG_MODULE_DECLARE(mcuboot);
 
-#if (!defined(CONFIG_XTENSA) && DT_HAS_CHOSEN(zephyr_flash_controller))
+#if defined(CONFIG_STM32_MEMMAP)
+/* MEMORY MAPPED for XiP on external NOR flash takes the sspi-nor or ospi-nor or qspi-nor device */
+#define FLASH_DEVICE_ID SPI_FLASH_0_ID
+#if DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_xspi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_xspi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR_BY_IDX(DT_INST(0, st_stm32_xspi),1)
+#elif DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_ospi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_ospi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR(DT_INST(0, st_stm32_ospi_nor))
+#elif DT_NODE_HAS_STATUS(DT_INST(0, st_stm32_qspi_nor), okay)
+#define FLASH_DEVICE_NODE DT_INST(0, st_stm32_qspi_nor)
+#define FLASH_DEVICE_BASE DT_REG_ADDR(DT_INST(0, st_stm32_qspi_nor))
+#else
+#error "FLASH_DEVICE_NODE could not be determined"
+#endif
+
+#elif (!defined(CONFIG_XTENSA) && DT_HAS_CHOSEN(zephyr_flash_controller))
 #define FLASH_DEVICE_ID SOC_FLASH_0_ID
 #define FLASH_DEVICE_BASE CONFIG_FLASH_BASE_ADDRESS
 #define FLASH_DEVICE_NODE DT_CHOSEN(zephyr_flash_controller)