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89S4051 Power Down Mode.

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gauravkothari23

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HI all,
I am using 89S4051 MCR. to make a small project..
my only question is how can i use idle mode in 89S4051.
i Tried Writing the code:
Code: 
#include<reg51.h>
#include<stdio.h>

sbit ledon=P1^6;

unsigned char ex0_isr_counter = 0;

void ex0_isr (void) interrupt  0
{
	 ex0_isr_counter++;
}
	
void main()
{	
	  ledon=1;
	  EA = 1;		   
	  EX0 = 1;
	  IE0=1;
	  PCON |= 0x01;
	  ledon=0;
}
it exits idle mode but within a second it again enter the idle mode.
i have a led connected to it.. which gets on after the idle mode is exited..
but the led gets off within a sec which stats that it has again entered the idle mode
 

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