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 1a0dd93f1..758894718 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
@@ -101,6 +101,10 @@ UINT8 sf_mcu_write_multi(UINT8 reg[], UINT8 data[], UINT32 num)
     {
         printf("W_addr[%d]=0x%02x\n", reg[i], data[i]);
     }
+    printf("\n");
+    fflush(NULL);
+    system("sync");
+    sf_sleep_ms(100);
 	if(0 <= sf_commu_set_mcu_many(reg, data, &pnum))
 	{
         // for(i = 0; i < num; i++)