/* --- STC12C5Axx Series MCU Power-Down wakeup by INT0 Demo --------*/


#include "reg51.h"
#include "intrins.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)
    {
        INT0 = 1;                   //ready read INT0 port
        while (!INT0);              //check INT0
        _nop_();
        _nop_();
        PCON = 0x02;                //MCU power down
        _nop_();
        _nop_();
        P1++;
    }
}