diff --git a/APP/system_init.c b/APP/system_init.c
index 3d3deae..589aefa 100644
--- a/APP/system_init.c
+++ b/APP/system_init.c
@@ -143,15 +143,15 @@ void Data_Init(void)
     /* data clear */
     data_clear((uint32_t)__ram_data_start, (uint32_t)__ram_data_end);
     data_clear((uint32_t)__bss_start, (uint32_t)__bss_end);
-    data_clear((uint32_t)__ram_ncache_data_start, (uint32_t)__ram_ncache_data_end);
-    data_clear((uint32_t)__ncache_bss_start, (uint32_t)__ncache_bss_end);
+//    data_clear((uint32_t)__ram_ncache_data_start, (uint32_t)__ram_ncache_data_end);
+//    data_clear((uint32_t)__ncache_bss_start, (uint32_t)__ncache_bss_end);
 
-    data_clear((uint32_t)__itcm_start, (uint32_t)__itcm_end);
-    data_clear((uint32_t)__xcp_start, (uint32_t)__xcp_end);
+//    data_clear((uint32_t)__itcm_start, (uint32_t)__itcm_end);
+//    data_clear((uint32_t)__xcp_start, (uint32_t)__xcp_end);
 
     /* data copy */
     data_copy((uint32_t)__rom_data_start, (uint32_t)__ram_data_start, (uint32_t)__ram_data_end);
-    data_copy((uint32_t)__rom_ncache_data_start, (uint32_t)__ram_ncache_data_start, (uint32_t)__ram_ncache_data_end);
+//    data_copy((uint32_t)__rom_ncache_data_start, (uint32_t)__ram_ncache_data_start, (uint32_t)__ram_ncache_data_end);
 
 #elif defined(__ICCARM__)
     #pragma section=".data"