STC89C53RC datasheet(13/165 Pages) STC

13 / 165 page

void main (void)

{

unsigned char

j = 0;

unsigned char

wakeup_counter = 0;

//clear interrupt wakeup counter variable wakeup_counter

Begin_LED = 0;

//system start-up LED

INT_System_init ( );

//Interrupt system initialization

while(1)

{

P2 = wakeup_counter;

wakeup_counter++;

for(j=0; j<2; j++)

{

Normal_Work_Flashing( );

//System normal work

}

Is_Power_Down = 1;

//Set this bit before go into Power-down mode

PCON

= 0x02;

//after this instruction, MCU will be in power-down mode

//external clock stop

_nop_( );

}

void INT_System_init (void)

{

IT0

= 0;

/* External interrupt 0, low electrical level triggered */

IT0

= 1;

/* External interrupt 0, negative edge triggered */

EX0

= 1;

/* Enable external interrupt 0

IT1

= 0;

/* External interrupt 1, low electrical level triggered */

IT1

= 1;

/* External interrupt 1, negative edge triggered */

EX1

= 1;

/* Enable external interrupt 1

= 1;

/* Set Global Enable bit

}

void INT0_Routine (void) interrupt 0

{

if (Is_Power_Down)

{

//Is_Power_Down ==1;

/* Power-Down wakeup on INT0 */

Is_Power_Down = 0;

Is_Power_Down_LED_INT0 = 0;

/*open external interrupt 0 Power-Down wake-up LED indicator */

while (Power_Down_Wakeup_Pin_INT0 == 0)

{

/* wait higher */

}

Is_Power_Down_LED_INT0 = 1;

/* close external interrupt 0 Power-Down wake-up LED indicator */

}

STC89C53RC データシート(PDF) 13 Page - STCmicro Technology Co,.Ltd

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STC89C53RC データシート(PDF) 13 Page - STCmicro Technology Co,.Ltd

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