void RTC_Init(void)
{
    RTC_Startup_Set();

    CIIR = 0;
    AMR = 0;

    ALSEC = 0;
    ALMIN = 0;
    ALHOUR = 0;
    ALDOM = 0;
    ALDOW = 0;
    ALDOY = 0;
    ALMON = 0;
    ALYEAR = 0;

    // initialize the interrupt vector
    VICIntSelect &= ~(1<<VIC_RTC);
    VICVectAddr4 = (unsigned long)RTC_Handler;
    VICVectCntl4 = (1<<VIC_CHNL_ENABLE_BIT) | VIC_RTC;
    VICIntEnable |= (1<<VIC_RTC);
    ALHOUR = RTC_SYNC_WITCH_FM_31256_TIME;         //Установим час периодической синхронизации с FM31256

    PREINT = (unsigned short)(PCLK/32768)-1;
    PREFRAC = PCLK - ((PREINT + 1) * 32768);

    CCR = (1<<CCR_CLKEN_BIT);
}