/* --- STC12C5Axx Series MCU Power-Down wakeup by T1 Demo ----------*/


#include "reg51.h"
#include "intrins.h"

sfr WAKE_CLKO = 0x8f;

//External interrupt0 service routine
void t1int() interrupt 3           //(location at 001BH)
{
}

void main()
{
    WAKE_CLKO = 0x20;               //enable T1 falling edge wakeup MCU from power-down mode
    ET1 = 1;                        //enable T1 interrupt
    EA = 1;                         //open global interrupt switch

    while (1)
    {
        T1 = 1;                     //ready read T1 port
        while (!T1);                //check T1
        _nop_();
        _nop_();
        PCON = 0x02;                //MCU power down
        _nop_();
        _nop_();
        P1++;
    }
}