STC12LE5616AD datasheet(154/377 Pages) STC

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6.7.3 Programs of P3.4/T0 Interrupt(falling edge) used to wake up PD mode

1. C program

/*-----------------------------------------------------------------------------------------------------------------------------*/

/* --- STC MCU International Limited --------------------------------------------------------------------------------*/

/* --- STC 1T Series MCU Power-Down wakeup by T0 Demo ----------------------------------------------------*/

/* ---This Interrupt will borrow Timer 0 interrupt request bit TF0 and Timer 0 interrupt vector address ----*/

/* ---So Timer 0 function should be disabled when this Interrupt is enabled -------------------------------------*/

/* ---The enable bit of this Interrupt is T0_PIN_IE / WAKE_CLKO.4 in WAKE_CLKO register -----------*/

/* 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"

sfr WAKE_CLKO = 0x8f;

//External interrupt0 service routine

void t0int( ) interrupt 1

//T0 interrupt, interrupt 1 (location at 000BH)

{

}

void main()

{

WAKE_CLKO = 0x10;

//enable P3.4/T0/

P3.4/T0/INT falling edge wakeup MCU

//from power-down mode

//T0_PIN_IE (WAKE_CLKO.4) = 1

//ET0 = 1;

//enable T0 interrupt

EA = 1;

//open global interrupt switch

while (1)

{

T0 = 1;

//ready read T0 port

while (!T0);

//check T0

_nop_();

PCON = 0x02;

//MCU power down

_nop_();

P1++;

}

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STC12LE5616AD Datasheet(PDF) 154 Page - STCmicro Technology Co,.Ltd

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