PSoC4 half high level output?

Hi:

  I use Cy8C4124 as an I2C slave device. if master don't read anything after 30 secounds. CY8C4124 will go to stop mode.most times are fine but some times, i find all of output pin of CY8C4124 is high level output. it is not 3.3V, but is 1.7V.

  I don't know why. please help me. thank you very much.

my code you can see below:

int main()
{
    
    CySysPmUnfreezeIo();
    CyGlobalIntEnable; /* Enable global interrupts. */

    I2CM_Start();
    EZI2C_EzI2CSetBuffer1(BUFFER_SIZE, READ_ONLY_OFFSET, ezI2cBuffer);
    EZI2C_Start();

    ReadfromBattary();
    
    Test_Write(1);
    CyDelay(10);
    Test_Write(0);
    CyDelay(1000);
    Test_Write(1);
    
    Timer_1_Start();
    TimerISR_StartEx(timer_isr); // Do use this one! 
    /* Place your initialization/startup code here (e.g. MyInst_Start()) */

    while(1)
    {}
}

void TimerISR( void )
{
    sleepcount++;
    if(timecount>=500000)
    {
    timecount=0;
    Test_Write(1);    
    ReadfromBattary();   
    }
    else
    {
    timecount++;
    read_flag=0;  
    Test1_Write(0);  
    Test_Write(0);
    }
    if(sleepcount>=5000000)
    {
    sleepcount=0;

    I2CM_Stop();    
    EZI2C_Stop();    
    Timer_1_Stop();
    
    CySysPmSetWakeupPolarity(CY_PM_STOP_WAKEUP_ACTIVE_HIGH); 
    
    CySysPmStop();

    }
    
}