/* --- STC12C5Axx Series MCU Ext0(Falling edge) Demo ---------------*/



#include "reg51.h"

//External interrupt0 service routine
void exint0() interrupt 0           //(location at 0003H)
{
}

void main()
{
    IT0 = 1;                        //set INT0 int type (1:Falling 0:Low level)
    EX0 = 1;                        //enable INT0 interrupt
    EA = 1;                         //open global interrupt switch
    
    while (1);
}