diff --git a/bsp/stm32/stm32f427-robomaster-a/README.md b/bsp/stm32/stm32f427-robomaster-a/README.md
index 9b288d5048..bba5febd73 100644
--- a/bsp/stm32/stm32f427-robomaster-a/README.md
+++ b/bsp/stm32/stm32f427-robomaster-a/README.md
@@ -22,7 +22,7 @@ RoboMaster开发板套件是一款面向机器人DIY的开源主控套件。开
 
 该开发板常用 **板载资源** 如下：
 
-- MCU：STM32f427IIH6，主频 180MHz，2048KB FLASH ，128KB RAM
+- MCU：STM32f427IIH6，主频 180MHz，2048KB FLASH ，256KB RAM(含64KB CCM RAM未使用)
 - 常用外设
   - LED：2个，D10（红色，PE11），D9（绿色，PE14）
   - 按键：1个，KEY（PB2）
diff --git a/bsp/stm32/stm32f427-robomaster-a/board/board.h b/bsp/stm32/stm32f427-robomaster-a/board/board.h
index 57c8e4a954..4c74f95682 100644
--- a/bsp/stm32/stm32f427-robomaster-a/board/board.h
+++ b/bsp/stm32/stm32f427-robomaster-a/board/board.h
@@ -25,7 +25,7 @@ extern "C" {
 #define STM32_FLASH_SIZE               (2048 * 1024)
 #define STM32_FLASH_END_ADDRESS        ((uint32_t)(STM32_FLASH_START_ADRESS + STM32_FLASH_SIZE))
 
-#define STM32_SRAM1_SIZE               (128)
+#define STM32_SRAM1_SIZE               (192)
 #define STM32_SRAM1_START              (0x20000000)
 #define STM32_SRAM1_END                (STM32_SRAM1_START + STM32_SRAM1_SIZE * 1024)
 
diff --git a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.icf b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.icf
index a481a85ff3..03094ef488 100644
--- a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.icf
+++ b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.icf
@@ -6,8 +6,10 @@ define symbol __ICFEDIT_intvec_start__ = 0x08000000;
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__    = 0x08000000;
 define symbol __ICFEDIT_region_ROM_end__      = 0x081FFFFF;
-define symbol __ICFEDIT_region_RAM_start__    = 0x20000000;
-define symbol __ICFEDIT_region_RAM_end__      = 0x2001FFFF;
+define symbol __ICFEDIT_region_RAM1_start__   = 0x20000000;
+define symbol __ICFEDIT_region_RAM1_end__     = 0x2002FFFF;
+define symbol __ICFEDIT_region_RAM2_start__   = 0x10000000;
+define symbol __ICFEDIT_region_RAM2_end__     = 0x1000FFFF;
 
 /*-Sizes-*/
 define symbol __ICFEDIT_size_cstack__ = 0x0400;
diff --git a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.lds b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.lds
index 9d870aef5e..739d488555 100644
--- a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.lds
+++ b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.lds
@@ -6,7 +6,8 @@
 MEMORY
 {
     ROM (rx) : ORIGIN = 0x08000000, LENGTH = 2048k /* 2048KB flash */
-    RAM (rw) : ORIGIN = 0x20000000, LENGTH =  128k  /* 128KB sram */
+    RAM1 (rw) : ORIGIN = 0x20000000, LENGTH =  192k /* 192K sram */
+    RAM2 (rw) : ORIGIN = 0x10000000, LENGTH =   64k /* 64K sram */
 }
 ENTRY(Reset_Handler)
 _system_stack_size = 0x200;
@@ -88,7 +89,7 @@ SECTIONS
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
-    } > RAM
+    } > RAM1
 
     .stack : 
     {
@@ -97,7 +98,7 @@ SECTIONS
         . = . + _system_stack_size;
         . = ALIGN(4);
         _estack = .;
-    } > RAM
+    } > RAM1
 
     __bss_start = .;
     .bss :
@@ -115,7 +116,7 @@ SECTIONS
         _ebss = . ;
         
         *(.bss.init)
-    } > RAM
+    } > RAM1
     __bss_end = .;
 
     _end = .;
diff --git a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.sct b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.sct
index b4e850d630..aca2546c3a 100644
--- a/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.sct
+++ b/bsp/stm32/stm32f427-robomaster-a/board/linker_scripts/link.sct
@@ -8,8 +8,10 @@ LR_IROM1 0x08000000 0x00200000  {    ; load region size_region
    *(InRoot$$Sections)
    .ANY (+RO)
   }
-  RW_IRAM1 0x20000000 0x00020000  {  ; RW data
+  RW_IRAM1 0x20000000 0x00030000  {  ; RW data
+   .ANY (+RW +ZI)
+  }
+  RW_IRAM2 0x10000000 0x00010000  {  ; RW data
    .ANY (+RW +ZI)
   }
 }
-