diff --git a/dts/arm/st/h7/stm32h743.dtsi b/dts/arm/st/h7/stm32h743.dtsi
new file mode 100644
index 00000000000..97d3c64b7ee
--- /dev/null
+++ b/dts/arm/st/h7/stm32h743.dtsi
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2020 Teslabs Engineering S.L.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <st/h7/stm32h7.dtsi>
+
+/ {
+	/* system data RAM accessible over over AXI bus */
+	sram0: memory@24000000 {
+		compatible = "mmio-sram";
+		reg = <0x24000000 DT_SIZE_K(512)>;
+	};
+
+	dtcm: memory@20000000 {
+		compatible = "arm,dtcm";
+		reg = <0x20000000 DT_SIZE_K(128)>;
+	};
+};
diff --git a/dts/arm/st/h7/stm32h743Xi.dtsi b/dts/arm/st/h7/stm32h743Xi.dtsi
new file mode 100644
index 00000000000..490185ae2a5
--- /dev/null
+++ b/dts/arm/st/h7/stm32h743Xi.dtsi
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2020 Teslabs Engineering S.L.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <mem.h>
+#include <st/h7/stm32h743.dtsi>
+
+/ {
+	soc {
+		flash-controller@52002000 {
+			flash0: flash@8000000 {
+				reg = <0x08000000 DT_SIZE_K(2048)>;
+			};
+		};
+	};
+};