diff --git a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/stm32h743xI.sct b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/stm32h743xI.sct
index 6310a0cb42..be31314ac4 100644
--- a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/stm32h743xI.sct
+++ b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_ARM_STD/stm32h743xI.sct
@@ -28,9 +28,6 @@
 ; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-; STM32F767ZI: 2048KB FLASH (0x200000) + 128KB DTCM RAM (0x20000)
-; 166 vectors = 664 bytes (0x298) to be reserved in RAM
-
 #if !defined(MBED_APP_START)
   #define MBED_APP_START 0x08000000
 #endif
@@ -45,8 +42,8 @@
 
 #define Stack_Size MBED_BOOT_STACK_SIZE
 
-#define MBED_RAM_START              0x20000000
-#define MBED_RAM_SIZE               0x20000
+#define MBED_RAM_START              0x24000000
+#define MBED_RAM_SIZE               0x80000
 #define MBED_VECTTABLE_RAM_START    (MBED_RAM_START)
 #define MBED_VECTTABLE_RAM_SIZE     0x298
 #define MBED_CRASH_REPORT_RAM_START (MBED_VECTTABLE_RAM_START + MBED_VECTTABLE_RAM_SIZE)
@@ -61,7 +58,7 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
    *(InRoot$$Sections)
    .ANY (+RO)
   }
-  
+
   RW_m_crash_data MBED_CRASH_REPORT_RAM_START EMPTY MBED_CRASH_REPORT_RAM_SIZE { ; RW data
   }
 
@@ -71,4 +68,18 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
 
   ARM_LIB_STACK (MBED_RAM0_START+MBED_RAM0_SIZE) EMPTY -Stack_Size { ; stack
   }
+
+  RW_DMARxDscrTab 0x30040000 0x60 {
+    *(.RxDecripSection)
+  }
+  RW_DMATxDscrTab 0x30040100 0x140 {
+    *(.TxDecripSection)
+  }
+  RW_Rx_Buffb 0x30040400 0x1800 {
+    *(.RxArraySection)
+  }
+  RW_Eth_Ram 0x30044000 0x4000 {
+    *(.ethusbram)
+  }
+
 }
diff --git a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_GCC_ARM/STM32H743xI.ld b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_GCC_ARM/STM32H743xI.ld
index 4351303f53..12dfa9020c 100644
--- a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_GCC_ARM/STM32H743xI.ld
+++ b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_GCC_ARM/STM32H743xI.ld
@@ -18,8 +18,12 @@ M_CRASH_DATA_RAM_SIZE = 0x100;
 
 MEMORY
 { 
-  FLASH (rx) : ORIGIN = MBED_APP_START, LENGTH = MBED_APP_SIZE
-  RAM (rwx)  : ORIGIN = 0x20000298, LENGTH = 128K - 0x298
+  FLASH (rx)     : ORIGIN = MBED_APP_START, LENGTH = MBED_APP_SIZE
+  DTCMRAM (rwx)  : ORIGIN = 0x20000000, LENGTH = 128K
+  RAM (xrw)      : ORIGIN = 0x24000298, LENGTH = 512K - 0x298  /* end = 0x24080000 */
+  RAM_D2 (xrw)   : ORIGIN = 0x30000000, LENGTH = 288K
+  RAM_D3 (xrw)   : ORIGIN = 0x38000000, LENGTH = 64K
+  ITCMRAM (xrw)  : ORIGIN = 0x00000000, LENGTH = 64K
 }
 
 /* Linker script to place sections and symbol values. Should be used together
@@ -180,4 +184,19 @@ SECTIONS
 
     /* Check if data + heap + stack exceeds RAM limit */
     ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+
+    .lwip_sec (NOLOAD) : {
+        . = ABSOLUTE(0x30040000);
+        *(.RxDecripSection) 
+        
+        . = ABSOLUTE(0x30040100);
+        *(.TxDecripSection)
+        
+        . = ABSOLUTE(0x30040400);
+        *(.RxArraySection) 
+
+        . = ABSOLUTE(0x30044000);
+        *(.ethusbram) 
+
+    } >RAM_D2 AT> FLASH
 }
diff --git a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_IAR/stm32h743xI.icf b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_IAR/stm32h743xI.icf
index 23cfdbc51c..cd92feee9c 100644
--- a/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_IAR/stm32h743xI.icf
+++ b/targets/TARGET_STM/TARGET_STM32H7/TARGET_STM32H743xI/device/TOOLCHAIN_IAR/stm32h743xI.icf
@@ -7,15 +7,15 @@ define symbol __intvec_start__     = MBED_APP_START;
 define symbol __region_ROM_start__ = MBED_APP_START;
 define symbol __region_ROM_end__   = MBED_APP_START + MBED_APP_SIZE - 1;
 
-// 128KB DTCM RAM (0x20000)
+// 512KB RAM (0x80000)
 // Vector table dynamic copy: 166 vectors = 664 bytes (0x298) reserved
 // Crash data area: 256 bytes (0x100) reserved
-define symbol __NVIC_start__                  = 0x20000000;
-define symbol __NVIC_end__                    = 0x20000297;
-define symbol __region_CRASH_DATA_RAM_start__ = 0x20000298; // Aligned on 8 bytes
-define symbol __region_CRASH_DATA_RAM_end__   = 0x20000397;
-define symbol __region_RAM_start__            = 0x20000398; // Aligned on 8 bytes
-define symbol __region_RAM_end__              = 0x20000000 + 0x20000 - 1;
+define symbol __NVIC_start__                  = 0x24000000;
+define symbol __NVIC_end__                    = 0x24000297;
+define symbol __region_CRASH_DATA_RAM_start__ = 0x24000298; // Aligned on 8 bytes
+define symbol __region_CRASH_DATA_RAM_end__   = 0x24000397;
+define symbol __region_RAM_start__            = 0x24000398; // Aligned on 8 bytes
+define symbol __region_RAM_end__              = 0x24000000 + 0x80000 - 1;
 
 // Memory regions
 define memory mem with size = 4G;
@@ -23,6 +23,10 @@ define region ROM_region = mem:[from __region_ROM_start__ to __region_ROM_end__]
 define region RAM_region = mem:[from __region_RAM_start__ to __region_RAM_end__];
 define region CRASH_DATA_RAM_region = mem:[from __region_CRASH_DATA_RAM_start__ to __region_CRASH_DATA_RAM_end__];
 
+// Memory region used for ethernet
+define region eth_mem_region = mem:[from 0x30044000 to 0x30048000 ];
+place in eth_mem_region	{ section .ethusbram };
+
 // Crash data symbols
 define exported symbol __CRASH_DATA_RAM_START__ = __region_CRASH_DATA_RAM_start__;
 define exported symbol __CRASH_DATA_RAM_END__ = __region_CRASH_DATA_RAM_end__;