diff --git a/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/inc/bl702_ef_ctrl.h b/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/inc/bl702_ef_ctrl.h
index 0e77122e..81739155 100644
--- a/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/inc/bl702_ef_ctrl.h
+++ b/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/inc/bl702_ef_ctrl.h
@@ -39,7 +39,6 @@
 #include "bl702_common.h"
 #include "ef_ctrl_reg.h"
 
-
 /** @addtogroup  BL702_Peripheral_Driver
  *  @{
  */
@@ -276,7 +275,8 @@ BL_Err_Type EF_Ctrl_Read_MAC_Address_Opt(uint8_t slot, uint8_t mac[8], uint8_t r
 BL_Err_Type EF_Ctrl_Read_Chip_ID(uint8_t id[8]);
 /*----------*/
 BL_Err_Type EF_Ctrl_Get_Chip_PIDVID(uint16_t pid[1], uint16_t vid[1]);
-uint64_t    EF_Ctrl_Get_Key_Slot_w0w1();
+uint32_t    EF_Ctrl_Get_Key_Slot_w0();
+uint32_t    EF_Ctrl_Get_Key_Slot_w1();
 BL_Err_Type EF_Ctrl_Get_Customer_PIDVID(uint16_t pid[1], uint16_t vid[1]);
 /*----------*/
 void        EF_Ctrl_Read_Device_Info(Efuse_Device_Info_Type *deviceInfo);
diff --git a/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/src/bl702_ef_ctrl.c b/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/src/bl702_ef_ctrl.c
index f2d5337e..01d99173 100644
--- a/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/src/bl702_ef_ctrl.c
+++ b/source/Core/BSP/Magic/bl_mcu_sdk/drivers/bl702_driver/std_drv/src/bl702_ef_ctrl.c
@@ -1065,16 +1065,19 @@ BL_Err_Type EF_Ctrl_Get_Chip_PIDVID(uint16_t pid[1], uint16_t vid[1]) {
   return SUCCESS;
 }
 
-uint64_t EF_Ctrl_Get_Key_Slot_w0w1() {
-  uint64_t tmpVal;
+uint32_t EF_Ctrl_Get_Key_Slot_w0() {
 
   /* Trigger read data from efuse */
   EF_CTRL_LOAD_BEFORE_READ_R0;
 
-  tmpVal = BL_RD_REG(EF_DATA_BASE, EF_DATA_0_EF_KEY_SLOT_4_W0);
-  tmpVal |= ((uint64_t)BL_RD_REG(EF_DATA_BASE, EF_DATA_0_EF_KEY_SLOT_4_W1)) << 32;
+  return BL_RD_REG(EF_DATA_BASE, EF_DATA_0_EF_KEY_SLOT_4_W0);
+}
+uint32_t EF_Ctrl_Get_Key_Slot_w1() {
 
-  return tmpVal;
+  /* Trigger read data from efuse */
+  EF_CTRL_LOAD_BEFORE_READ_R0;
+
+  return BL_RD_REG(EF_DATA_BASE, EF_DATA_0_EF_KEY_SLOT_4_W1);
 }
 
 /****************************************************************************