diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_ARM_STD/lib_peripheral_mbed_arm.ar b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_ARM_STD/lib_peripheral_mbed_arm.ar
index 156f86a576..6d7383f16e 100644
Binary files a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_ARM_STD/lib_peripheral_mbed_arm.ar and b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_ARM_STD/lib_peripheral_mbed_arm.ar differ
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a
index 44b1a3c34f..7b2963eb35 100644
Binary files a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a and b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_GCC_ARM/lib_peripheral_mbed_gcc.a differ
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_IAR/lib_peripheral_mbed_iar.a b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_IAR/lib_peripheral_mbed_iar.a
index 84af9c1399..3c0932dcf8 100644
Binary files a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_IAR/lib_peripheral_mbed_iar.a and b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/device/TOOLCHAIN_IAR/lib_peripheral_mbed_iar.a differ
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/us_ticker.c b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/us_ticker.c
index 40cb05c136..81bff2a2fa 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/us_ticker.c
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_MCU_RTL8195A/us_ticker.c
@@ -97,7 +97,7 @@ void us_ticker_set_interrupt(timestamp_t timestamp)
 
     HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
     HalTimerOpExt.HalTimerReLoad((u32)TimerAdapter.TimerId, TimerAdapter.TimerLoadValueUs);
-    //HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
+    HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
     HalTimerOp.HalTimerEn((u32)TimerAdapter.TimerId);
 }
 
@@ -107,7 +107,7 @@ void us_ticker_fire_interrupt(void)
 
     HalTimerOp.HalTimerDis((u32)TimerAdapter.TimerId);
     HalTimerOpExt.HalTimerReLoad((u32)TimerAdapter.TimerId, TimerAdapter.TimerLoadValueUs);
-    //HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
+    HalTimerOpExt.HalTimerSync(SYS_TIM_ID);
     HalTimerOp.HalTimerEn((u32)TimerAdapter.TimerId);
 }
 
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
index d152487eab..a16f443979 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/hal_timer.h
@@ -1,14 +1,10 @@
-/*******************************************************************************
- *Copyright (c) 2013-2016 Realtek Semiconductor Corp, All Rights Reserved
- * SPDX-License-Identifier: LicenseRef-PBL
- * 
- * Licensed under the Permissive Binary License, Version 1.0 (the "License"); 
- * you may not use this file except in compliance with the License.
- * 
- * You may obtain a copy of the License at https://www.mbed.com/licenses/PBL-1.0
- * 
- * See the License for the specific language governing permissions and limitations under the License.
- *******************************************************************************
+/*
+ *  Routines to access hardware
+ *
+ *  Copyright (c) 2013 Realtek Semiconductor Corp.
+ *
+ *  This module is a confidential and proprietary property of RealTek and
+ *  possession or use of this module requires written permission of RealTek.
  */
 
 #ifndef _HAL_TIMER_H_
@@ -54,6 +50,7 @@ typedef struct _HAL_TIMER_OP_EXT_ {
 	PHAL_TIMER_OP phal_timer_op_rom;
 	VOID (*HalTimerIrqEn)(u32 TimerId);
 	VOID (*HalTimerReLoad)(u32 TimerId, u32 LoadUs);
+	VOID (*HalTimerSync)(u32 TimerId);
 }HAL_TIMER_OP_EXT, *PHAL_TIMER_OP_EXT;
 
 #ifdef CONFIG_TIMER_MODULE
@@ -105,5 +102,6 @@ void
 HalTimerDeInit(
     void *Data
 );
+
 #endif  // #ifdef CONFIG_RELEASE_BUILD_LIBRARIES
 #endif
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/rtl8195a/rtl8195a_timer.h b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/rtl8195a/rtl8195a_timer.h
index caf8223d11..f8ad6fd821 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/rtl8195a/rtl8195a_timer.h
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/sdk/soc/realtek/8195a/fwlib/rtl8195a/rtl8195a_timer.h
@@ -89,6 +89,11 @@ HalTimerReLoadRtl8195a_Patch(
     IN  u32 LoadUs
 );
 
+VOID
+HalTimerSyncRtl8195a(
+    IN  u32 TimerId
+);
+
 u32
 HalTimerReadCountRtl8195a_Patch(
     IN  u32 TimerId
@@ -119,6 +124,11 @@ HalTimerDisRtl8195a_Patch(
     IN  u32 TimerId
 );
 
+VOID
+HalTimerSyncRtl8195a(
+    IN  u32 TimerId
+);
+
 VOID
 HalTimerDeInitRtl8195a_Patch(
     IN  VOID    *Data