diff --git a/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_IAR/M487.icf b/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_IAR/M487.icf
index 3efed8ee84..3608845ad3 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_IAR/M487.icf
+++ b/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_IAR/M487.icf
@@ -9,11 +9,12 @@ define symbol __ICFEDIT_intvec_start__ = MBED_APP_START;
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__ = MBED_APP_START;
 define symbol __ICFEDIT_region_ROM_end__   = MBED_APP_START + MBED_APP_SIZE - 1;
-define symbol __ICFEDIT_region_IRAM_start__ = 0x20000000;
+define symbol __region_CRASH_DATA_RAM_start__  = 0x20000000;
+define symbol __region_CRASH_DATA_RAM_end__  = 0x200000FF;
+define symbol __ICFEDIT_region_IRAM_start__ = 0x20000100;
 define symbol __ICFEDIT_region_IRAM_end__   = 0x20028000 - 1;
 /*-Sizes-*/
 define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_crash_data__ = 0x100;
 define symbol __ICFEDIT_size_intvec__ = (4 * (16 + 96));
 define symbol __ICFEDIT_size_heap__   = 0x10000;
 /**** End of ICF editor section. ###ICF###*/
@@ -22,16 +23,16 @@ define symbol __ICFEDIT_size_heap__   = 0x10000;
 define memory mem with size = 4G;
 define region ROM_region   = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__];
 define region IRAM_region  = mem:[from __ICFEDIT_region_IRAM_start__  to __ICFEDIT_region_IRAM_end__];
+define region CRASH_DATA_RAM_region = mem:[from __region_CRASH_DATA_RAM_start__ to __region_CRASH_DATA_RAM_end__];
 
 define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
 define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };
 /* NOTE: Vector table base requires to be aligned to the power of vector table size. Give a safe value here. */
 define block IRAMVEC   with alignment = 1024, size = __ICFEDIT_size_intvec__          { };
-define block CRASH_DATA_RAM   with alignment = 8, size = __ICFEDIT_size_crash_data__          { };
 
 /* Define Crash Data Symbols */
-define exported symbol __CRASH_DATA_RAM_START__ = __ICFEDIT_region_IRAM_start__ + __ICFEDIT_size_cstack__ + __ICFEDIT_size_intvec__;
-define exported symbol __CRASH_DATA_RAM_END__ = __ICFEDIT_region_IRAM_start__ + __ICFEDIT_size_cstack__ + __ICFEDIT_size_intvec__ + __ICFEDIT_size_crash_data__;
+define exported symbol __CRASH_DATA_RAM_START__ = __region_CRASH_DATA_RAM_start__;
+define exported symbol __CRASH_DATA_RAM_END__ = __region_CRASH_DATA_RAM_end__;
 
 initialize by copy { readwrite };
 do not initialize  { section .noinit };
@@ -41,6 +42,5 @@ place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
 place in ROM_region   { readonly };
 place at start of IRAM_region   { block CSTACK };
 place in IRAM_region   { block IRAMVEC };
-place in IRAM_region   { block CRASH_DATA_RAM };
 place in IRAM_region   { readwrite };
 place in IRAM_region   { block HEAP };
\ No newline at end of file