diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/device/RDA5981_nvic_virtual.h b/targets/TARGET_RDA/TARGET_UNO_91H/device/RDA5981_nvic_virtual.h
index 439c9c3ae8..0100cb897e 100644
--- a/targets/TARGET_RDA/TARGET_UNO_91H/device/RDA5981_nvic_virtual.h
+++ b/targets/TARGET_RDA/TARGET_UNO_91H/device/RDA5981_nvic_virtual.h
@@ -39,7 +39,7 @@ extern "C" {
 __NO_RETURN __STATIC_INLINE void __RDA5981_SystemReset(void)
 {
 	
-  rda_ccfg_ckrst () ;
+  //rda_ccfg_ckrst () ;
   __DSB();                                                          /* Ensure all outstanding memory accesses included
                                                                        buffered write are completed before reset */
   SCB->AIRCR  = (uint32_t)((0x5FAUL << SCB_AIRCR_VECTKEY_Pos)    |
diff --git a/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c b/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c
index f91a5d03e5..ce8c5eb251 100644
--- a/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c
+++ b/targets/TARGET_RDA/TARGET_UNO_91H/rda_ccfg_api.c
@@ -211,7 +211,7 @@ int rda_ccfg_boot(void)
     }
     /*close usb polling*/
     RDA_GPIO->CTRL &= ~(0x01UL << 12);
-    rda_ccfg_ck();
+    //rda_ccfg_ck();
     /* Set flash clock */
     rda_ccfg_spifck();
     /* Set aon timer clock source */