초보적인 ARM 질문...

#include<aduc7026.h>
 
#define DEFPORT0 0x60UL
#define DEFPORT1 0xFCUL
 
void IRQ_Handler(void) __irq;		 
 
int main(void)
{
        unsigned long i = 0; 
        IRQEN = 0x0;
        IRQCLR = 0xFFFFFFFF;
 
        // CD Config
        POWKEY1 = 0x01;
        POWCON = 0;// Active mode, 41.78 MHz. CD=0, Bellow
        POWKEY2 = 0xF4;
 
        // Set Timer1
        T1LD = 26112	// Counter Value
        // CD=0, CLK/16 ==> (41.78Mhz/16)*26112 = 10mS 
        T1CON = 0xC4;	// Enabled,Periodic,Binary and CLK/16
        IRQEN = GP_TIMER_BIT;	
        while (1){
               i++;
        }
 
}// end main
 
void IRQ_Handler(void) __irq		// IRQ routine
{				
        T1CLRI = 0;
        return ;			
}