diff --git a/demo/lowpower/Makefile b/demo/lowpower/Makefile
new file mode 100644
index 0000000..ebc5114
--- /dev/null
+++ b/demo/lowpower/Makefile
@@ -0,0 +1,34 @@
+## ----------------------------------------------------------- ##
+## Don't touch the next line unless you know what you're doing.##
+## ----------------------------------------------------------- ##
+
+# Name of the module
+LOCAL_NAME := demo/lowpower
+
+# List of submodules which contain code we need to include in the final lib
+LOCAL_API_DEPENDS := \
+
+LOCAL_ADD_INCLUDE := include\
+                    include/std_inc \
+                    include/api_inc \
+
+
+# Set this to any non-null string to signal a module which 
+# generates a binary (must contain a "main" entry point). 
+# If left null, only a library will be generated.
+IS_ENTRY_POINT := no
+
+## ------------------------------------ ##
+## 	Add your custom flags here          ##
+## ------------------------------------ ##
+MYCFLAGS += 
+
+## ------------------------------------- ##
+##	List all your sources here           ##
+## ------------------------------------- ##
+C_SRC := ${notdir ${wildcard src/*.c}}
+
+## ------------------------------------- ##
+##  Do Not touch below this line         ##
+## ------------------------------------- ##
+include ${SOFT_WORKDIR}/platform/compilation/cust_rules.mk
\ No newline at end of file
diff --git a/demo/lowpower/src/demo_lp.c b/demo/lowpower/src/demo_lp.c
new file mode 100644
index 0000000..e839b07
--- /dev/null
+++ b/demo/lowpower/src/demo_lp.c
@@ -0,0 +1,146 @@
+
+#include "stdbool.h"
+#include "stdint.h"
+#include "stdio.h"
+#include "string.h"
+
+#include "api_os.h"
+#include "api_debug.h"
+#include "api_event.h"
+#include "api_hal_pm.h"
+#include "api_key.h"
+#include "time.h"
+
+
+#define MAIN_TASK_STACK_SIZE    (2048 * 2)
+#define MAIN_TASK_PRIORITY      0
+#define MAIN_TASK_NAME          "Main Test Task"
+
+#define SECOND_TASK_STACK_SIZE    (2048 * 2)
+#define SECOND_TASK_PRIORITY      1
+#define SECOND_TASK_NAME          "Second Test Task"
+
+static HANDLE mainTaskHandle = NULL;
+
+
+void LoopTest()
+{
+    uint32_t i = 0;
+    volatile uint32_t j = 0;
+
+    clock_t timeStart = clock();
+    for(;i<0x00ff0000;++i)
+    {
+        j = i + 10;
+    }
+    clock_t timeEnd   = clock();
+    Trace(2,"loop test spent time:%d",(int)((timeEnd-timeStart)/CLOCKS_PER_MSEC));
+}
+
+void OnTimer(void* param)
+{
+    static int i=0;
+
+    if(i < 4)
+        OS_StartCallbackTimer(mainTaskHandle,20000,OnTimer,NULL);
+
+    if(i == 0)
+    {
+        Trace(1,"High Performance");
+        PM_SetSysMinFreq(PM_SYS_FREQ_312M);
+        LoopTest();
+    }
+    else if(i == 1)
+    {
+        Trace(1,"Performance 178M");
+        PM_SetSysMinFreq(PM_SYS_FREQ_178M);
+        LoopTest();
+    }
+    else if(i == 2)
+    {
+        Trace(1,"Performance 78M");
+        PM_SetSysMinFreq(PM_SYS_FREQ_78M);
+        LoopTest();
+    }
+    else if(i == 3)
+    {
+        Trace(1,"Performance 13M");
+        PM_SetSysMinFreq(PM_SYS_FREQ_13M);
+        LoopTest();
+    }
+    else if( i == 4 )
+    {
+        Trace(1,"sleep mode");
+        PM_SleepMode(true);
+        LoopTest();
+    }
+    ++i;
+}
+
+
+
+void EventDispatch(API_Event_t* pEvent)
+{
+    switch(pEvent->id)
+    {
+        case API_EVENT_ID_NO_SIMCARD:
+            Trace(10,"!!NO SIM CARD%d!!!!",pEvent->param1);
+            break;
+
+        case API_EVENT_ID_SYSTEM_READY:
+            Trace(1,"system initialize complete");
+            // PM_Test__();
+            break;
+
+        case API_EVENT_ID_NETWORK_REGISTERED_HOME:
+        case API_EVENT_ID_NETWORK_REGISTERED_ROAMING:
+            Trace(2,"network register success");
+            OnTimer(NULL);
+            break;
+
+        case API_EVENT_ID_POWER_ON:
+            Trace(1,"Power on ,cause:0x%02x",pEvent->param1);
+            break;
+
+        case API_EVENT_ID_KEY_DOWN:
+            Trace(1,"key down, key:0x%02x",pEvent->param1);
+            if(pEvent->param1 == KEY_POWER)
+            {
+                Trace(1,"power key press down now");
+            }
+            break;
+        case API_EVENT_ID_KEY_UP:
+            Trace(1,"key release, key:0x%02x",pEvent->param1);
+            if(pEvent->param1 == KEY_POWER)
+            {
+                Trace(1,"power key release now");
+            }
+            break;
+        default:
+            break;
+    }
+}
+
+
+void MainTask(void *pData)
+{
+    API_Event_t* event=NULL;
+
+    while(1)
+    {
+        if(OS_WaitEvent(mainTaskHandle, (void**)&event, OS_TIME_OUT_WAIT_FOREVER))
+        {
+            EventDispatch(event);
+            OS_Free(event->pParam1);
+            OS_Free(event->pParam2);
+            OS_Free(event);
+        }
+    }
+}
+
+void lowpower_Main()
+{
+    mainTaskHandle = OS_CreateTask(MainTask,
+        NULL, NULL, MAIN_TASK_STACK_SIZE, MAIN_TASK_PRIORITY, 0, 0, MAIN_TASK_NAME);
+    OS_SetUserMainHandle(&mainTaskHandle);
+}
diff --git a/include/api_hal_pm.h b/include/api_hal_pm.h
index ef0e3ff..60ab222 100644
--- a/include/api_hal_pm.h
+++ b/include/api_hal_pm.h
@@ -40,5 +40,8 @@ typedef enum{
 #define PM_Restart          CSDK_FUNC(PM_Restart)
 #define PowerEnable         CSDK_FUNC(PM_PowerEnable)
 
+// void PM_SetSysMinFreq(PM_Sys_Freq_t freq);
+#define PM_SetSysMinFreq    CSDK_FUNC(PM_SetSysMinFreq)
+
 #endif