RAM_FUNC    
void cpu_io_irq(void) __irq  
{
    unsigned int status = AT91C_BASE_PIOA->PIO_ISR;
    // MY<
//    unsigned int     mask = AT91C_BASE_AIC->AIC_IMR; // MASK iNTERRUPT
//    unsigned short tempFMR = AT91C_BASE_MC->MC_FMR;
    // MY>
    status &= AT91C_BASE_PIOA->PIO_IMR;

    // MY<
//    AT91C_BASE_AIC->AIC_IDCR = 0xFFFFFFFF; /// DISABLE ALL INTERRUPT
    // MY>


    if(status & REM_INPUT_PIN)
    {
        rem_interupt();    
    }


    if(status & PWM_PIN_FUSE)
    {
    //    pwm_interupt();
    }
    // MY<
//    AT91C_BASE_MC->MC_FMR = tempFMR;
//    AT91C_BASE_AIC->AIC_IECR = mask;
    // MY>
    AT91C_BASE_AIC->AIC_EOICR =  status;
}

void init_io(void)
{
    /// PWM
    AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;

    /// Interupt
    AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91C_ID_PIOA );

    AT91C_BASE_SYS->PIOA_PPUDR    =        REM_INPUT_PIN | PWM_PIN_FUSE;
    AT91C_BASE_PIOA->PIO_IFER     =        REM_INPUT_PIN | PWM_PIN_FUSE;

    AT91F_PIO_CfgInput(AT91C_BASE_PIOA, REM_INPUT_PIN|PWM_PIN_FUSE);
    AT91F_AIC_ConfigureIt (AT91C_BASE_AIC, AT91C_ID_PIOA, AT91C_AIC_PRIOR_HIGHEST,AT91C_AIC_SRCTYPE_EXT_NEGATIVE_EDGE, (void (*)() )cpu_io_irq);
    AT91F_PIO_InterruptEnable(AT91C_BASE_PIOA,REM_INPUT_PIN|PWM_PIN_FUSE);
    AT91F_AIC_EnableIt (AT91C_BASE_AIC, AT91C_ID_PIOA);
}