STC出的官方验证的，外部中断唤醒
/*------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------------------------------------*/
/* --- STC12C5Axx Series MCU Power-Down wakeup by INT0 Demo --------*/
/* If you want to use the program or the program referenced in the */
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#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++;
}
}
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