diff --git a/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu_reg.c b/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu_reg.c
index 60210d0fd..bb01e71d9 100755
--- a/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu_reg.c
+++ b/code/application/source/sf_app/code/source/systemMng/sf_commu_mcu_reg.c
@@ -167,7 +167,16 @@ unsigned char sf_mcu_power_on_para_get (MCUParam_t attrId)
         mcuReg[i++] = START_MODE;
         mcuReg[i++] = LUMINANCE_L;
         mcuReg[i++] = LUMINANCE_H;
-        sf_mcu_read_multi(mcuReg, mcuData, i);
+        if(FAIL == sf_mcu_read_multi(mcuReg, mcuData, i))
+        {
+            if(startflag)
+            {
+                startflag = 0;
+                i = 0;
+                sf_sleep_ms(200);
+                goto SF_CHK_STARTMODE;
+            }
+        }
         i = 0;
         McuSubVersion = mcuData[i++];
         
@@ -182,12 +191,6 @@ unsigned char sf_mcu_power_on_para_get (MCUParam_t attrId)
     	IRSHTTER = (dataTemp2 << 8) | dataTemp1;
 	}
 
-    if((startMode != startModetmp) && (startflag))
-    {
-        startflag = 0;
-        sf_sleep_ms(200);
-        goto SF_CHK_STARTMODE;
-    }
 	printf(" start mode = %d IRSHTTER = %d McuVersion:%d.%d.%d\n", startMode, IRSHTTER, (McuVersion>>8)&0xFF, McuVersion & 0xFF, McuSubVersion);
     sf_mcu_rtc_get(&time);
     if(startMode == startModetmp)